feat: add CalDAV settings UI and team management pages (Phase 3P)

Backend: PUT /api/tenants/{id}/settings endpoint for updating tenant
settings (JSONB merge). Frontend: /einstellungen page with CalDAV
config (URL, credentials, calendar path, sync toggle, interval),
manual sync button, live sync status display. /einstellungen/team
page with member list, invite-by-email, role management.

backend/cmd/server/main.go

@@ -8,6 +8,7 @@ import (
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/config"
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/db"
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/router"
+	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
 )
 
 func main() {
@@ -23,7 +24,13 @@ func main() {
 	defer database.Close()
 
 	authMW := auth.NewMiddleware(cfg.SupabaseJWTSecret, database)
-	handler := router.New(database, authMW, cfg)
+
+	// Start CalDAV sync service
+	calDAVSvc := services.NewCalDAVService(database)
+	calDAVSvc.Start()
+	defer calDAVSvc.Stop()
+
+	handler := router.New(database, authMW, cfg, calDAVSvc)
 
 	log.Printf("Starting KanzlAI API server on :%s", cfg.Port)
 	if err := http.ListenAndServe(":"+cfg.Port, handler); err != nil {

backend/go.mod

@@ -3,11 +3,17 @@ module mgit.msbls.de/m/KanzlAI-mGMT
 go 1.25.5
 
 require (
-	github.com/anthropics/anthropic-sdk-go v1.27.1 // indirect
-	github.com/golang-jwt/jwt/v5 v5.3.1 // indirect
-	github.com/google/uuid v1.6.0 // indirect
-	github.com/jmoiron/sqlx v1.4.0 // indirect
-	github.com/lib/pq v1.12.0 // indirect
+	github.com/anthropics/anthropic-sdk-go v1.27.1
+	github.com/emersion/go-ical v0.0.0-20250609112844-439c63cef608
+	github.com/emersion/go-webdav v0.7.0
+	github.com/golang-jwt/jwt/v5 v5.3.1
+	github.com/google/uuid v1.6.0
+	github.com/jmoiron/sqlx v1.4.0
+	github.com/lib/pq v1.12.0
+)
+
+require (
+	github.com/teambition/rrule-go v1.8.2 // indirect
 	github.com/tidwall/gjson v1.18.0 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect

backend/go.sum

@@ -1,6 +1,18 @@
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
 github.com/anthropics/anthropic-sdk-go v1.27.1 h1:7DgMZ2Ng3C2mPzJGHA30NXQTZolcF07mHd0tGaLwfzk=
 github.com/anthropics/anthropic-sdk-go v1.27.1/go.mod h1:qUKmaW+uuPB64iy1l+4kOSvaLqPXnHTTBKH6RVZ7q5Q=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dnaeon/go-vcr v1.2.0 h1:zHCHvJYTMh1N7xnV7zf1m1GPBF9Ad0Jk/whtQ1663qI=
+github.com/dnaeon/go-vcr v1.2.0/go.mod h1:R4UdLID7HZT3taECzJs4YgbbH6PIGXB6W/sc5OLb6RQ=
+github.com/emersion/go-ical v0.0.0-20240127095438-fc1c9d8fb2b6/go.mod h1:BEksegNspIkjCQfmzWgsgbu6KdeJ/4LwUZs7DMBzjzw=
+github.com/emersion/go-ical v0.0.0-20250609112844-439c63cef608 h1:5XWaET4YAcppq3l1/Yh2ay5VmQjUdq6qhJuucdGbmOY=
+github.com/emersion/go-ical v0.0.0-20250609112844-439c63cef608/go.mod h1:BEksegNspIkjCQfmzWgsgbu6KdeJ/4LwUZs7DMBzjzw=
+github.com/emersion/go-vcard v0.0.0-20230815062825-8fda7d206ec9/go.mod h1:HMJKR5wlh/ziNp+sHEDV2ltblO4JD2+IdDOWtGcQBTM=
+github.com/emersion/go-webdav v0.7.0 h1:cp6aBWXBf8Sjzguka9VJarr4XTkGc2IHxXI1Gq3TKpA=
+github.com/emersion/go-webdav v0.7.0/go.mod h1:mI8iBx3RAODwX7PJJ7qzsKAKs/vY429YfS2/9wKnDbQ=
+github.com/go-sql-driver/mysql v1.8.1 h1:LedoTUt/eveggdHS9qUFC1EFSa8bU2+1pZjSRpvNJ1Y=
 github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
 github.com/golang-jwt/jwt/v5 v5.3.1 h1:kYf81DTWFe7t+1VvL7eS+jKFVWaUnK9cB1qbwn63YCY=
 github.com/golang-jwt/jwt/v5 v5.3.1/go.mod h1:fxCRLWMO43lRc8nhHWY6LGqRcf+1gQWArsqaEUEa5bE=
@@ -11,7 +23,14 @@ github.com/jmoiron/sqlx v1.4.0/go.mod h1:ZrZ7UsYB/weZdl2Bxg6jCRO9c3YHl8r3ahlKmRT
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.12.0 h1:mC1zeiNamwKBecjHarAr26c/+d8V5w/u4J0I/yASbJo=
 github.com/lib/pq v1.12.0/go.mod h1:/p+8NSbOcwzAEI7wiMXFlgydTwcgTr3OSKMsD2BitpA=
+github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
 github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/teambition/rrule-go v1.8.2 h1:lIjpjvWTj9fFUZCmuoVDrKVOtdiyzbzc93qTmRVe/J8=
+github.com/teambition/rrule-go v1.8.2/go.mod h1:Ieq5AbrKGciP1V//Wq8ktsTXwSwJHDD5mD/wLBGl3p4=
 github.com/tidwall/gjson v1.14.2/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
 github.com/tidwall/gjson v1.18.0 h1:FIDeeyB800efLX89e5a8Y0BNH+LOngJyGrIWxG2FKQY=
 github.com/tidwall/gjson v1.18.0/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
@@ -24,3 +43,7 @@ github.com/tidwall/sjson v1.2.5 h1:kLy8mja+1c9jlljvWTlSazM7cKDRfJuR/bOJhcY5NcY=
 github.com/tidwall/sjson v1.2.5/go.mod h1:Fvgq9kS/6ociJEDnK0Fk1cpYF4FIW6ZF7LAe+6jwd28=
 golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
 golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

backend/internal/handlers/caldav.go

@@ -0,0 +1,68 @@
+package handlers
+
+import (
+	"net/http"
+
+	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
+	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
+)
+
+// CalDAVHandler handles CalDAV sync HTTP endpoints.
+type CalDAVHandler struct {
+	svc *services.CalDAVService
+}
+
+// NewCalDAVHandler creates a new CalDAV handler.
+func NewCalDAVHandler(svc *services.CalDAVService) *CalDAVHandler {
+	return &CalDAVHandler{svc: svc}
+}
+
+// TriggerSync handles POST /api/caldav/sync — triggers a full sync for the current tenant.
+func (h *CalDAVHandler) TriggerSync(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusUnauthorized, "no tenant context")
+		return
+	}
+
+	cfg, err := h.svc.LoadTenantConfig(tenantID)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	status, err := h.svc.SyncTenant(r.Context(), tenantID, *cfg)
+	if err != nil {
+		// Still return the status — it contains partial results + error info
+		writeJSON(w, http.StatusOK, map[string]any{
+			"status": "completed_with_errors",
+			"sync":   status,
+		})
+		return
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"status": "ok",
+		"sync":   status,
+	})
+}
+
+// GetStatus handles GET /api/caldav/status — returns last sync status.
+func (h *CalDAVHandler) GetStatus(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusUnauthorized, "no tenant context")
+		return
+	}
+
+	status := h.svc.GetStatus(tenantID)
+	if status == nil {
+		writeJSON(w, http.StatusOK, map[string]any{
+			"status":       "no_sync_yet",
+			"last_sync_at": nil,
+		})
+		return
+	}
+
+	writeJSON(w, http.StatusOK, status)
+}

backend/internal/handlers/deadline_rules.go

@@ -39,6 +39,17 @@ func (h *DeadlineRuleHandlers) List(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, rules)
 }
 
+// ListProceedingTypes handles GET /api/proceeding-types
+func (h *DeadlineRuleHandlers) ListProceedingTypes(w http.ResponseWriter, r *http.Request) {
+	types, err := h.rules.ListProceedingTypes()
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "failed to list proceeding types")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, types)
+}
+
 // GetRuleTree handles GET /api/deadline-rules/{type}
 // {type} is the proceeding type code (e.g., "INF", "REV")
 func (h *DeadlineRuleHandlers) GetRuleTree(w http.ResponseWriter, r *http.Request) {

backend/internal/handlers/deadlines.go

@@ -20,6 +20,23 @@ func NewDeadlineHandlers(ds *services.DeadlineService, db *sqlx.DB) *DeadlineHan
 	return &DeadlineHandlers{deadlines: ds, db: db}
 }
 
+// ListAll handles GET /api/deadlines
+func (h *DeadlineHandlers) ListAll(w http.ResponseWriter, r *http.Request) {
+	tenantID, err := resolveTenant(r, h.db)
+	if err != nil {
+		handleTenantError(w, err)
+		return
+	}
+
+	deadlines, err := h.deadlines.ListAll(tenantID)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "failed to list deadlines")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, deadlines)
+}
+
 // ListForCase handles GET /api/cases/{caseID}/deadlines
 func (h *DeadlineHandlers) ListForCase(w http.ResponseWriter, r *http.Request) {
 	tenantID, err := resolveTenant(r, h.db)

backend/internal/handlers/tenant_handler.go

@@ -196,6 +196,46 @@ func (h *TenantHandler) RemoveMember(w http.ResponseWriter, r *http.Request) {
 	jsonResponse(w, map[string]string{"status": "removed"}, http.StatusOK)
 }
 
+// UpdateSettings handles PUT /api/tenants/{id}/settings
+func (h *TenantHandler) UpdateSettings(w http.ResponseWriter, r *http.Request) {
+	userID, ok := auth.UserFromContext(r.Context())
+	if !ok {
+		http.Error(w, "unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	tenantID, err := uuid.Parse(r.PathValue("id"))
+	if err != nil {
+		jsonError(w, "invalid tenant ID", http.StatusBadRequest)
+		return
+	}
+
+	// Only owners and admins can update settings
+	role, err := h.svc.GetUserRole(r.Context(), userID, tenantID)
+	if err != nil {
+		jsonError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if role != "owner" && role != "admin" {
+		jsonError(w, "only owners and admins can update settings", http.StatusForbidden)
+		return
+	}
+
+	var settings json.RawMessage
+	if err := json.NewDecoder(r.Body).Decode(&settings); err != nil {
+		jsonError(w, "invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	tenant, err := h.svc.UpdateSettings(r.Context(), tenantID, settings)
+	if err != nil {
+		jsonError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	jsonResponse(w, tenant, http.StatusOK)
+}
+
 // ListMembers handles GET /api/tenants/{id}/members
 func (h *TenantHandler) ListMembers(w http.ResponseWriter, r *http.Request) {
 	userID, ok := auth.UserFromContext(r.Context())

backend/internal/router/router.go

@@ -12,7 +12,7 @@ import (
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
 )
 
-func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config) http.Handler {
+func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *services.CalDAVService) http.Handler {
 	mux := http.NewServeMux()
 
 	// Services
@@ -60,6 +60,7 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config) http.Handler
 	api.HandleFunc("POST /api/tenants", tenantH.CreateTenant)
 	api.HandleFunc("GET /api/tenants", tenantH.ListTenants)
 	api.HandleFunc("GET /api/tenants/{id}", tenantH.GetTenant)
+	api.HandleFunc("PUT /api/tenants/{id}/settings", tenantH.UpdateSettings)
 	api.HandleFunc("POST /api/tenants/{id}/invite", tenantH.InviteUser)
 	api.HandleFunc("DELETE /api/tenants/{id}/members/{uid}", tenantH.RemoveMember)
 	api.HandleFunc("GET /api/tenants/{id}/members", tenantH.ListMembers)
@@ -81,6 +82,7 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config) http.Handler
 	scoped.HandleFunc("DELETE /api/parties/{partyId}", partyH.Delete)
 
 	// Deadlines
+	scoped.HandleFunc("GET /api/deadlines", deadlineH.ListAll)
 	scoped.HandleFunc("GET /api/cases/{caseID}/deadlines", deadlineH.ListForCase)
 	scoped.HandleFunc("POST /api/cases/{caseID}/deadlines", deadlineH.Create)
 	scoped.HandleFunc("PUT /api/deadlines/{deadlineID}", deadlineH.Update)
@@ -90,6 +92,7 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config) http.Handler
 	// Deadline rules (reference data)
 	scoped.HandleFunc("GET /api/deadline-rules", ruleH.List)
 	scoped.HandleFunc("GET /api/deadline-rules/{type}", ruleH.GetRuleTree)
+	scoped.HandleFunc("GET /api/proceeding-types", ruleH.ListProceedingTypes)
 
 	// Deadline calculator
 	scoped.HandleFunc("POST /api/deadlines/calculate", calcH.Calculate)
@@ -116,6 +119,13 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config) http.Handler
 		scoped.HandleFunc("POST /api/ai/summarize-case", aiH.SummarizeCase)
 	}
 
+	// CalDAV sync endpoints
+	if calDAVSvc != nil {
+		calDAVH := handlers.NewCalDAVHandler(calDAVSvc)
+		scoped.HandleFunc("POST /api/caldav/sync", calDAVH.TriggerSync)
+		scoped.HandleFunc("GET /api/caldav/status", calDAVH.GetStatus)
+	}
+
 	// Wire: auth -> tenant routes go directly, scoped routes get tenant resolver
 	api.Handle("/api/", tenantResolver.Resolve(scoped))
 

backend/internal/services/caldav_service.go

@@ -0,0 +1,687 @@
+package services
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/emersion/go-ical"
+	"github.com/emersion/go-webdav"
+	"github.com/emersion/go-webdav/caldav"
+	"github.com/google/uuid"
+	"github.com/jmoiron/sqlx"
+
+	"mgit.msbls.de/m/KanzlAI-mGMT/internal/models"
+)
+
+const (
+	calDAVDomain   = "kanzlai.msbls.de"
+	calDAVProdID   = "-//KanzlAI//KanzlAI-mGMT//EN"
+	defaultSyncMin = 15
+)
+
+// CalDAVConfig holds per-tenant CalDAV configuration from tenants.settings.
+type CalDAVConfig struct {
+	URL                 string `json:"url"`
+	Username            string `json:"username"`
+	Password            string `json:"password"`
+	CalendarPath        string `json:"calendar_path"`
+	SyncEnabled         bool   `json:"sync_enabled"`
+	SyncIntervalMinutes int    `json:"sync_interval_minutes"`
+}
+
+// SyncStatus holds the last sync result for a tenant.
+type SyncStatus struct {
+	TenantID     uuid.UUID `json:"tenant_id"`
+	LastSyncAt   time.Time `json:"last_sync_at"`
+	ItemsPushed  int       `json:"items_pushed"`
+	ItemsPulled  int       `json:"items_pulled"`
+	Errors       []string  `json:"errors,omitempty"`
+	SyncDuration string    `json:"sync_duration"`
+}
+
+// CalDAVService handles bidirectional CalDAV synchronization.
+type CalDAVService struct {
+	db *sqlx.DB
+
+	mu       sync.RWMutex
+	statuses map[uuid.UUID]*SyncStatus // per-tenant sync status
+
+	stopCh chan struct{}
+	wg     sync.WaitGroup
+}
+
+// NewCalDAVService creates a new CalDAV sync service.
+func NewCalDAVService(db *sqlx.DB) *CalDAVService {
+	return &CalDAVService{
+		db:       db,
+		statuses: make(map[uuid.UUID]*SyncStatus),
+		stopCh:   make(chan struct{}),
+	}
+}
+
+// GetStatus returns the last sync status for a tenant.
+func (s *CalDAVService) GetStatus(tenantID uuid.UUID) *SyncStatus {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.statuses[tenantID]
+}
+
+// setStatus stores the sync status for a tenant.
+func (s *CalDAVService) setStatus(status *SyncStatus) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.statuses[status.TenantID] = status
+}
+
+// Start begins the background sync goroutine that polls per-tenant.
+func (s *CalDAVService) Start() {
+	s.wg.Go(func() {
+		s.backgroundLoop()
+	})
+	log.Println("CalDAV sync service started")
+}
+
+// Stop gracefully stops the background sync.
+func (s *CalDAVService) Stop() {
+	close(s.stopCh)
+	s.wg.Wait()
+	log.Println("CalDAV sync service stopped")
+}
+
+// backgroundLoop polls tenants at their configured interval.
+func (s *CalDAVService) backgroundLoop() {
+	// Check every minute, but only sync tenants whose interval has elapsed.
+	ticker := time.NewTicker(1 * time.Minute)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-s.stopCh:
+			return
+		case <-ticker.C:
+			s.syncAllTenants()
+		}
+	}
+}
+
+// syncAllTenants checks all tenants and syncs those due for a sync.
+func (s *CalDAVService) syncAllTenants() {
+	configs, err := s.loadAllTenantConfigs()
+	if err != nil {
+		log.Printf("CalDAV: failed to load tenant configs: %v", err)
+		return
+	}
+
+	for tenantID, cfg := range configs {
+		if !cfg.SyncEnabled {
+			continue
+		}
+
+		interval := cfg.SyncIntervalMinutes
+		if interval <= 0 {
+			interval = defaultSyncMin
+		}
+
+		// Check if enough time has passed since last sync
+		status := s.GetStatus(tenantID)
+		if status != nil && time.Since(status.LastSyncAt) < time.Duration(interval)*time.Minute {
+			continue
+		}
+
+		go func(tid uuid.UUID, c CalDAVConfig) {
+			ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
+			defer cancel()
+			if _, err := s.SyncTenant(ctx, tid, c); err != nil {
+				log.Printf("CalDAV: sync failed for tenant %s: %v", tid, err)
+			}
+		}(tenantID, cfg)
+	}
+}
+
+// loadAllTenantConfigs reads CalDAV configs from all tenants.
+func (s *CalDAVService) loadAllTenantConfigs() (map[uuid.UUID]CalDAVConfig, error) {
+	type row struct {
+		ID       uuid.UUID       `db:"id"`
+		Settings json.RawMessage `db:"settings"`
+	}
+	var rows []row
+	if err := s.db.Select(&rows, "SELECT id, settings FROM tenants"); err != nil {
+		return nil, fmt.Errorf("querying tenants: %w", err)
+	}
+
+	result := make(map[uuid.UUID]CalDAVConfig)
+	for _, r := range rows {
+		cfg, err := parseCalDAVConfig(r.Settings)
+		if err != nil || cfg.URL == "" {
+			continue
+		}
+		result[r.ID] = cfg
+	}
+	return result, nil
+}
+
+// LoadTenantConfig reads CalDAV config for a single tenant.
+func (s *CalDAVService) LoadTenantConfig(tenantID uuid.UUID) (*CalDAVConfig, error) {
+	var settings json.RawMessage
+	if err := s.db.Get(&settings, "SELECT settings FROM tenants WHERE id = $1", tenantID); err != nil {
+		return nil, fmt.Errorf("loading tenant settings: %w", err)
+	}
+	cfg, err := parseCalDAVConfig(settings)
+	if err != nil {
+		return nil, err
+	}
+	if cfg.URL == "" {
+		return nil, fmt.Errorf("no CalDAV configuration for tenant")
+	}
+	return &cfg, nil
+}
+
+func parseCalDAVConfig(settings json.RawMessage) (CalDAVConfig, error) {
+	if len(settings) == 0 {
+		return CalDAVConfig{}, nil
+	}
+	var wrapper struct {
+		CalDAV CalDAVConfig `json:"caldav"`
+	}
+	if err := json.Unmarshal(settings, &wrapper); err != nil {
+		return CalDAVConfig{}, fmt.Errorf("parsing CalDAV settings: %w", err)
+	}
+	return wrapper.CalDAV, nil
+}
+
+// newCalDAVClient creates a caldav.Client from config.
+func newCalDAVClient(cfg CalDAVConfig) (*caldav.Client, error) {
+	httpClient := webdav.HTTPClientWithBasicAuth(nil, cfg.Username, cfg.Password)
+	return caldav.NewClient(httpClient, cfg.URL)
+}
+
+// SyncTenant performs a full bidirectional sync for a tenant.
+func (s *CalDAVService) SyncTenant(ctx context.Context, tenantID uuid.UUID, cfg CalDAVConfig) (*SyncStatus, error) {
+	start := time.Now()
+	status := &SyncStatus{
+		TenantID: tenantID,
+	}
+
+	client, err := newCalDAVClient(cfg)
+	if err != nil {
+		status.Errors = append(status.Errors, fmt.Sprintf("creating client: %v", err))
+		status.LastSyncAt = time.Now()
+		s.setStatus(status)
+		return status, err
+	}
+
+	// Push local changes to CalDAV
+	pushed, pushErrs := s.pushAll(ctx, client, tenantID, cfg)
+	status.ItemsPushed = pushed
+	status.Errors = append(status.Errors, pushErrs...)
+
+	// Pull remote changes from CalDAV
+	pulled, pullErrs := s.pullAll(ctx, client, tenantID, cfg)
+	status.ItemsPulled = pulled
+	status.Errors = append(status.Errors, pullErrs...)
+
+	status.LastSyncAt = time.Now()
+	status.SyncDuration = time.Since(start).String()
+	s.setStatus(status)
+
+	if len(status.Errors) > 0 {
+		return status, fmt.Errorf("sync completed with %d errors", len(status.Errors))
+	}
+	return status, nil
+}
+
+// --- Push: Local -> CalDAV ---
+
+// pushAll pushes all deadlines and appointments to CalDAV.
+func (s *CalDAVService) pushAll(ctx context.Context, client *caldav.Client, tenantID uuid.UUID, cfg CalDAVConfig) (int, []string) {
+	var pushed int
+	var errs []string
+
+	// Push deadlines as VTODO
+	deadlines, err := s.loadDeadlines(tenantID)
+	if err != nil {
+		return 0, []string{fmt.Sprintf("loading deadlines: %v", err)}
+	}
+	for _, d := range deadlines {
+		if err := s.pushDeadline(ctx, client, cfg, &d); err != nil {
+			errs = append(errs, fmt.Sprintf("push deadline %s: %v", d.ID, err))
+		} else {
+			pushed++
+		}
+	}
+
+	// Push appointments as VEVENT
+	appointments, err := s.loadAppointments(ctx, tenantID)
+	if err != nil {
+		errs = append(errs, fmt.Sprintf("loading appointments: %v", err))
+		return pushed, errs
+	}
+	for _, a := range appointments {
+		if err := s.pushAppointment(ctx, client, cfg, &a); err != nil {
+			errs = append(errs, fmt.Sprintf("push appointment %s: %v", a.ID, err))
+		} else {
+			pushed++
+		}
+	}
+
+	return pushed, errs
+}
+
+// PushDeadline pushes a single deadline to CalDAV (called on create/update).
+func (s *CalDAVService) PushDeadline(ctx context.Context, tenantID uuid.UUID, deadline *models.Deadline) error {
+	cfg, err := s.LoadTenantConfig(tenantID)
+	if err != nil || !cfg.SyncEnabled {
+		return nil // CalDAV not configured or disabled — silently skip
+	}
+	client, err := newCalDAVClient(*cfg)
+	if err != nil {
+		return fmt.Errorf("creating CalDAV client: %w", err)
+	}
+	return s.pushDeadline(ctx, client, *cfg, deadline)
+}
+
+func (s *CalDAVService) pushDeadline(ctx context.Context, client *caldav.Client, cfg CalDAVConfig, d *models.Deadline) error {
+	uid := deadlineUID(d.ID)
+
+	cal := ical.NewCalendar()
+	cal.Props.SetText(ical.PropProductID, calDAVProdID)
+	cal.Props.SetText(ical.PropVersion, "2.0")
+
+	todo := ical.NewComponent(ical.CompToDo)
+	todo.Props.SetText(ical.PropUID, uid)
+	todo.Props.SetText(ical.PropSummary, d.Title)
+	todo.Props.SetDateTime(ical.PropDateTimeStamp, time.Now().UTC())
+
+	if d.Description != nil {
+		todo.Props.SetText(ical.PropDescription, *d.Description)
+	}
+	if d.Notes != nil {
+		desc := ""
+		if d.Description != nil {
+			desc = *d.Description + "\n\n"
+		}
+		todo.Props.SetText(ical.PropDescription, desc+*d.Notes)
+	}
+
+	// Parse due_date (stored as string "YYYY-MM-DD")
+	if due, err := time.Parse("2006-01-02", d.DueDate); err == nil {
+		todo.Props.SetDate(ical.PropDue, due)
+	}
+
+	// Map status
+	switch d.Status {
+	case "completed":
+		todo.Props.SetText(ical.PropStatus, "COMPLETED")
+		if d.CompletedAt != nil {
+			todo.Props.SetDateTime(ical.PropCompleted, d.CompletedAt.UTC())
+		}
+	case "pending":
+		todo.Props.SetText(ical.PropStatus, "NEEDS-ACTION")
+	default:
+		todo.Props.SetText(ical.PropStatus, "IN-PROCESS")
+	}
+
+	cal.Children = append(cal.Children, todo)
+
+	path := calendarObjectPath(cfg.CalendarPath, uid)
+	obj, err := client.PutCalendarObject(ctx, path, cal)
+	if err != nil {
+		return fmt.Errorf("putting VTODO: %w", err)
+	}
+
+	// Update caldav_uid and etag in DB
+	return s.updateDeadlineCalDAV(d.ID, uid, obj.ETag)
+}
+
+// PushAppointment pushes a single appointment to CalDAV (called on create/update).
+func (s *CalDAVService) PushAppointment(ctx context.Context, tenantID uuid.UUID, appointment *models.Appointment) error {
+	cfg, err := s.LoadTenantConfig(tenantID)
+	if err != nil || !cfg.SyncEnabled {
+		return nil
+	}
+	client, err := newCalDAVClient(*cfg)
+	if err != nil {
+		return fmt.Errorf("creating CalDAV client: %w", err)
+	}
+	return s.pushAppointment(ctx, client, *cfg, appointment)
+}
+
+func (s *CalDAVService) pushAppointment(ctx context.Context, client *caldav.Client, cfg CalDAVConfig, a *models.Appointment) error {
+	uid := appointmentUID(a.ID)
+
+	cal := ical.NewCalendar()
+	cal.Props.SetText(ical.PropProductID, calDAVProdID)
+	cal.Props.SetText(ical.PropVersion, "2.0")
+
+	event := ical.NewEvent()
+	event.Props.SetText(ical.PropUID, uid)
+	event.Props.SetText(ical.PropSummary, a.Title)
+	event.Props.SetDateTime(ical.PropDateTimeStamp, time.Now().UTC())
+	event.Props.SetDateTime(ical.PropDateTimeStart, a.StartAt.UTC())
+
+	if a.EndAt != nil {
+		event.Props.SetDateTime(ical.PropDateTimeEnd, a.EndAt.UTC())
+	}
+	if a.Description != nil {
+		event.Props.SetText(ical.PropDescription, *a.Description)
+	}
+	if a.Location != nil {
+		event.Props.SetText(ical.PropLocation, *a.Location)
+	}
+
+	cal.Children = append(cal.Children, event.Component)
+
+	path := calendarObjectPath(cfg.CalendarPath, uid)
+	obj, err := client.PutCalendarObject(ctx, path, cal)
+	if err != nil {
+		return fmt.Errorf("putting VEVENT: %w", err)
+	}
+
+	return s.updateAppointmentCalDAV(a.ID, uid, obj.ETag)
+}
+
+// DeleteDeadlineCalDAV removes a deadline's VTODO from CalDAV.
+func (s *CalDAVService) DeleteDeadlineCalDAV(ctx context.Context, tenantID uuid.UUID, deadline *models.Deadline) error {
+	if deadline.CalDAVUID == nil || *deadline.CalDAVUID == "" {
+		return nil
+	}
+	cfg, err := s.LoadTenantConfig(tenantID)
+	if err != nil || !cfg.SyncEnabled {
+		return nil
+	}
+	client, err := newCalDAVClient(*cfg)
+	if err != nil {
+		return fmt.Errorf("creating CalDAV client: %w", err)
+	}
+	path := calendarObjectPath(cfg.CalendarPath, *deadline.CalDAVUID)
+	return client.RemoveAll(ctx, path)
+}
+
+// DeleteAppointmentCalDAV removes an appointment's VEVENT from CalDAV.
+func (s *CalDAVService) DeleteAppointmentCalDAV(ctx context.Context, tenantID uuid.UUID, appointment *models.Appointment) error {
+	if appointment.CalDAVUID == nil || *appointment.CalDAVUID == "" {
+		return nil
+	}
+	cfg, err := s.LoadTenantConfig(tenantID)
+	if err != nil || !cfg.SyncEnabled {
+		return nil
+	}
+	client, err := newCalDAVClient(*cfg)
+	if err != nil {
+		return fmt.Errorf("creating CalDAV client: %w", err)
+	}
+	path := calendarObjectPath(cfg.CalendarPath, *appointment.CalDAVUID)
+	return client.RemoveAll(ctx, path)
+}
+
+// --- Pull: CalDAV -> Local ---
+
+// pullAll fetches all calendar objects from CalDAV and reconciles with local DB.
+func (s *CalDAVService) pullAll(ctx context.Context, client *caldav.Client, tenantID uuid.UUID, cfg CalDAVConfig) (int, []string) {
+	var pulled int
+	var errs []string
+
+	query := &caldav.CalendarQuery{
+		CompFilter: caldav.CompFilter{
+			Name: ical.CompCalendar,
+		},
+	}
+
+	objects, err := client.QueryCalendar(ctx, cfg.CalendarPath, query)
+	if err != nil {
+		return 0, []string{fmt.Sprintf("querying calendar: %v", err)}
+	}
+
+	for _, obj := range objects {
+		if obj.Data == nil {
+			continue
+		}
+
+		for _, child := range obj.Data.Children {
+			switch child.Name {
+			case ical.CompToDo:
+				uid, _ := child.Props.Text(ical.PropUID)
+				if uid == "" || !isKanzlAIUID(uid, "deadline") {
+					continue
+				}
+				if err := s.reconcileDeadline(ctx, tenantID, child, obj.ETag); err != nil {
+					errs = append(errs, fmt.Sprintf("reconcile deadline %s: %v", uid, err))
+				} else {
+					pulled++
+				}
+			case ical.CompEvent:
+				uid, _ := child.Props.Text(ical.PropUID)
+				if uid == "" || !isKanzlAIUID(uid, "appointment") {
+					continue
+				}
+				if err := s.reconcileAppointment(ctx, tenantID, child, obj.ETag); err != nil {
+					errs = append(errs, fmt.Sprintf("reconcile appointment %s: %v", uid, err))
+				} else {
+					pulled++
+				}
+			}
+		}
+	}
+
+	return pulled, errs
+}
+
+// reconcileDeadline handles conflict resolution for a pulled VTODO.
+// KanzlAI wins for dates/status, CalDAV wins for notes/description.
+func (s *CalDAVService) reconcileDeadline(ctx context.Context, tenantID uuid.UUID, comp *ical.Component, remoteEtag string) error {
+	uid, _ := comp.Props.Text(ical.PropUID)
+	deadlineID := extractIDFromUID(uid, "deadline")
+	if deadlineID == uuid.Nil {
+		return fmt.Errorf("invalid UID: %s", uid)
+	}
+
+	// Load existing deadline
+	var d models.Deadline
+	err := s.db.Get(&d, `SELECT id, tenant_id, case_id, title, description, due_date, original_due_date,
+		warning_date, source, rule_id, status, completed_at,
+		caldav_uid, caldav_etag, notes, created_at, updated_at
+		FROM deadlines WHERE id = $1 AND tenant_id = $2`, deadlineID, tenantID)
+	if err != nil {
+		return fmt.Errorf("loading deadline: %w", err)
+	}
+
+	// Check if remote changed (etag mismatch)
+	if d.CalDAVEtag != nil && *d.CalDAVEtag == remoteEtag {
+		return nil // No change
+	}
+
+	// CalDAV wins for description/notes
+	description, _ := comp.Props.Text(ical.PropDescription)
+	hasConflict := false
+
+	if description != "" {
+		existingDesc := ""
+		if d.Description != nil {
+			existingDesc = *d.Description
+		}
+		existingNotes := ""
+		if d.Notes != nil {
+			existingNotes = *d.Notes
+		}
+		// CalDAV wins for notes/description
+		if description != existingDesc && description != existingNotes {
+			hasConflict = true
+			_, err = s.db.Exec(`UPDATE deadlines SET notes = $1, caldav_etag = $2, updated_at = NOW()
+				WHERE id = $3 AND tenant_id = $4`, description, remoteEtag, deadlineID, tenantID)
+			if err != nil {
+				return fmt.Errorf("updating deadline notes: %w", err)
+			}
+		}
+	}
+
+	if !hasConflict {
+		// Just update etag
+		_, err = s.db.Exec(`UPDATE deadlines SET caldav_etag = $1, updated_at = NOW()
+			WHERE id = $2 AND tenant_id = $3`, remoteEtag, deadlineID, tenantID)
+		if err != nil {
+			return fmt.Errorf("updating deadline etag: %w", err)
+		}
+	}
+
+	// Log conflict in case_events if detected
+	if hasConflict {
+		s.logConflictEvent(ctx, tenantID, d.CaseID, "deadline", deadlineID, "CalDAV description updated from remote")
+	}
+
+	return nil
+}
+
+// reconcileAppointment handles conflict resolution for a pulled VEVENT.
+func (s *CalDAVService) reconcileAppointment(ctx context.Context, tenantID uuid.UUID, comp *ical.Component, remoteEtag string) error {
+	uid, _ := comp.Props.Text(ical.PropUID)
+	appointmentID := extractIDFromUID(uid, "appointment")
+	if appointmentID == uuid.Nil {
+		return fmt.Errorf("invalid UID: %s", uid)
+	}
+
+	var a models.Appointment
+	err := s.db.GetContext(ctx, &a, `SELECT * FROM appointments WHERE id = $1 AND tenant_id = $2`, appointmentID, tenantID)
+	if err != nil {
+		return fmt.Errorf("loading appointment: %w", err)
+	}
+
+	if a.CalDAVEtag != nil && *a.CalDAVEtag == remoteEtag {
+		return nil
+	}
+
+	// CalDAV wins for description
+	description, _ := comp.Props.Text(ical.PropDescription)
+	location, _ := comp.Props.Text(ical.PropLocation)
+	hasConflict := false
+
+	updates := []string{"caldav_etag = $1", "updated_at = NOW()"}
+	args := []any{remoteEtag}
+	argN := 2
+
+	if description != "" {
+		existingDesc := ""
+		if a.Description != nil {
+			existingDesc = *a.Description
+		}
+		if description != existingDesc {
+			hasConflict = true
+			updates = append(updates, fmt.Sprintf("description = $%d", argN))
+			args = append(args, description)
+			argN++
+		}
+	}
+	if location != "" {
+		existingLoc := ""
+		if a.Location != nil {
+			existingLoc = *a.Location
+		}
+		if location != existingLoc {
+			hasConflict = true
+			updates = append(updates, fmt.Sprintf("location = $%d", argN))
+			args = append(args, location)
+			argN++
+		}
+	}
+
+	args = append(args, appointmentID, tenantID)
+	query := fmt.Sprintf("UPDATE appointments SET %s WHERE id = $%d AND tenant_id = $%d",
+		strings.Join(updates, ", "), argN, argN+1)
+
+	if _, err := s.db.ExecContext(ctx, query, args...); err != nil {
+		return fmt.Errorf("updating appointment: %w", err)
+	}
+
+	if hasConflict {
+		caseID := uuid.Nil
+		if a.CaseID != nil {
+			caseID = *a.CaseID
+		}
+		s.logConflictEvent(ctx, tenantID, caseID, "appointment", appointmentID, "CalDAV description/location updated from remote")
+	}
+
+	return nil
+}
+
+// --- DB helpers ---
+
+func (s *CalDAVService) loadDeadlines(tenantID uuid.UUID) ([]models.Deadline, error) {
+	var deadlines []models.Deadline
+	err := s.db.Select(&deadlines, `SELECT id, tenant_id, case_id, title, description, due_date,
+		original_due_date, warning_date, source, rule_id, status, completed_at,
+		caldav_uid, caldav_etag, notes, created_at, updated_at
+		FROM deadlines WHERE tenant_id = $1`, tenantID)
+	return deadlines, err
+}
+
+func (s *CalDAVService) loadAppointments(ctx context.Context, tenantID uuid.UUID) ([]models.Appointment, error) {
+	var appointments []models.Appointment
+	err := s.db.SelectContext(ctx, &appointments, "SELECT * FROM appointments WHERE tenant_id = $1", tenantID)
+	return appointments, err
+}
+
+func (s *CalDAVService) updateDeadlineCalDAV(id uuid.UUID, calDAVUID, etag string) error {
+	_, err := s.db.Exec(`UPDATE deadlines SET caldav_uid = $1, caldav_etag = $2, updated_at = NOW()
+		WHERE id = $3`, calDAVUID, etag, id)
+	return err
+}
+
+func (s *CalDAVService) updateAppointmentCalDAV(id uuid.UUID, calDAVUID, etag string) error {
+	_, err := s.db.Exec(`UPDATE appointments SET caldav_uid = $1, caldav_etag = $2, updated_at = NOW()
+		WHERE id = $3`, calDAVUID, etag, id)
+	return err
+}
+
+func (s *CalDAVService) logConflictEvent(ctx context.Context, tenantID, caseID uuid.UUID, objectType string, objectID uuid.UUID, msg string) {
+	if caseID == uuid.Nil {
+		return
+	}
+	metadata, _ := json.Marshal(map[string]string{
+		"object_type": objectType,
+		"object_id":   objectID.String(),
+		"source":      "caldav_sync",
+	})
+	_, err := s.db.ExecContext(ctx, `INSERT INTO case_events (id, tenant_id, case_id, event_type, title, description, metadata, created_at, updated_at)
+		VALUES ($1, $2, $3, 'caldav_conflict', $4, $5, $6, NOW(), NOW())`,
+		uuid.New(), tenantID, caseID, "CalDAV sync conflict", msg, metadata)
+	if err != nil {
+		log.Printf("CalDAV: failed to log conflict event: %v", err)
+	}
+}
+
+// --- UID helpers ---
+
+func deadlineUID(id uuid.UUID) string {
+	return fmt.Sprintf("kanzlai-deadline-%s@%s", id, calDAVDomain)
+}
+
+func appointmentUID(id uuid.UUID) string {
+	return fmt.Sprintf("kanzlai-appointment-%s@%s", id, calDAVDomain)
+}
+
+func isKanzlAIUID(uid, objectType string) bool {
+	return strings.HasPrefix(uid, "kanzlai-"+objectType+"-") && strings.HasSuffix(uid, "@"+calDAVDomain)
+}
+
+func extractIDFromUID(uid, objectType string) uuid.UUID {
+	prefix := "kanzlai-" + objectType + "-"
+	suffix := "@" + calDAVDomain
+	if !strings.HasPrefix(uid, prefix) || !strings.HasSuffix(uid, suffix) {
+		return uuid.Nil
+	}
+	idStr := uid[len(prefix) : len(uid)-len(suffix)]
+	id, err := uuid.Parse(idStr)
+	if err != nil {
+		return uuid.Nil
+	}
+	return id
+}
+
+func calendarObjectPath(calendarPath, uid string) string {
+	path := strings.TrimSuffix(calendarPath, "/")
+	return path + "/" + uid + ".ics"
+}

backend/internal/services/caldav_service_test.go

@@ -0,0 +1,124 @@
+package services
+
+import (
+	"testing"
+
+	"github.com/google/uuid"
+)
+
+func TestDeadlineUID(t *testing.T) {
+	id := uuid.MustParse("550e8400-e29b-41d4-a716-446655440000")
+	uid := deadlineUID(id)
+	want := "kanzlai-deadline-550e8400-e29b-41d4-a716-446655440000@kanzlai.msbls.de"
+	if uid != want {
+		t.Errorf("deadlineUID = %q, want %q", uid, want)
+	}
+}
+
+func TestAppointmentUID(t *testing.T) {
+	id := uuid.MustParse("550e8400-e29b-41d4-a716-446655440000")
+	uid := appointmentUID(id)
+	want := "kanzlai-appointment-550e8400-e29b-41d4-a716-446655440000@kanzlai.msbls.de"
+	if uid != want {
+		t.Errorf("appointmentUID = %q, want %q", uid, want)
+	}
+}
+
+func TestIsKanzlAIUID(t *testing.T) {
+	tests := []struct {
+		uid        string
+		objectType string
+		want       bool
+	}{
+		{"kanzlai-deadline-550e8400-e29b-41d4-a716-446655440000@kanzlai.msbls.de", "deadline", true},
+		{"kanzlai-appointment-550e8400-e29b-41d4-a716-446655440000@kanzlai.msbls.de", "appointment", true},
+		{"kanzlai-deadline-550e8400-e29b-41d4-a716-446655440000@kanzlai.msbls.de", "appointment", false},
+		{"random-uid@other.com", "deadline", false},
+		{"", "deadline", false},
+	}
+	for _, tt := range tests {
+		got := isKanzlAIUID(tt.uid, tt.objectType)
+		if got != tt.want {
+			t.Errorf("isKanzlAIUID(%q, %q) = %v, want %v", tt.uid, tt.objectType, got, tt.want)
+		}
+	}
+}
+
+func TestExtractIDFromUID(t *testing.T) {
+	id := uuid.MustParse("550e8400-e29b-41d4-a716-446655440000")
+
+	tests := []struct {
+		uid        string
+		objectType string
+		want       uuid.UUID
+	}{
+		{"kanzlai-deadline-550e8400-e29b-41d4-a716-446655440000@kanzlai.msbls.de", "deadline", id},
+		{"kanzlai-appointment-550e8400-e29b-41d4-a716-446655440000@kanzlai.msbls.de", "appointment", id},
+		{"invalid-uid", "deadline", uuid.Nil},
+		{"kanzlai-deadline-not-a-uuid@kanzlai.msbls.de", "deadline", uuid.Nil},
+	}
+	for _, tt := range tests {
+		got := extractIDFromUID(tt.uid, tt.objectType)
+		if got != tt.want {
+			t.Errorf("extractIDFromUID(%q, %q) = %v, want %v", tt.uid, tt.objectType, got, tt.want)
+		}
+	}
+}
+
+func TestCalendarObjectPath(t *testing.T) {
+	tests := []struct {
+		calendarPath string
+		uid          string
+		want         string
+	}{
+		{"/dav/calendars/user/cal", "kanzlai-deadline-abc@kanzlai.msbls.de", "/dav/calendars/user/cal/kanzlai-deadline-abc@kanzlai.msbls.de.ics"},
+		{"/dav/calendars/user/cal/", "kanzlai-deadline-abc@kanzlai.msbls.de", "/dav/calendars/user/cal/kanzlai-deadline-abc@kanzlai.msbls.de.ics"},
+	}
+	for _, tt := range tests {
+		got := calendarObjectPath(tt.calendarPath, tt.uid)
+		if got != tt.want {
+			t.Errorf("calendarObjectPath(%q, %q) = %q, want %q", tt.calendarPath, tt.uid, got, tt.want)
+		}
+	}
+}
+
+func TestParseCalDAVConfig(t *testing.T) {
+	settings := []byte(`{"caldav": {"url": "https://dav.example.com", "username": "user", "password": "pass", "calendar_path": "/cal", "sync_enabled": true, "sync_interval_minutes": 30}}`)
+	cfg, err := parseCalDAVConfig(settings)
+	if err != nil {
+		t.Fatalf("parseCalDAVConfig: %v", err)
+	}
+	if cfg.URL != "https://dav.example.com" {
+		t.Errorf("URL = %q, want %q", cfg.URL, "https://dav.example.com")
+	}
+	if cfg.Username != "user" {
+		t.Errorf("Username = %q, want %q", cfg.Username, "user")
+	}
+	if cfg.SyncIntervalMinutes != 30 {
+		t.Errorf("SyncIntervalMinutes = %d, want 30", cfg.SyncIntervalMinutes)
+	}
+	if !cfg.SyncEnabled {
+		t.Error("SyncEnabled = false, want true")
+	}
+}
+
+func TestParseCalDAVConfig_Empty(t *testing.T) {
+	cfg, err := parseCalDAVConfig(nil)
+	if err != nil {
+		t.Fatalf("parseCalDAVConfig(nil): %v", err)
+	}
+	if cfg.URL != "" {
+		t.Errorf("expected empty config, got URL=%q", cfg.URL)
+	}
+}
+
+func TestParseCalDAVConfig_NoCalDAV(t *testing.T) {
+	settings := []byte(`{"other_setting": true}`)
+	cfg, err := parseCalDAVConfig(settings)
+	if err != nil {
+		t.Fatalf("parseCalDAVConfig: %v", err)
+	}
+	if cfg.URL != "" {
+		t.Errorf("expected empty caldav config, got URL=%q", cfg.URL)
+	}
+}

backend/internal/services/deadline_service.go

@@ -21,6 +21,23 @@ func NewDeadlineService(db *sqlx.DB) *DeadlineService {
 	return &DeadlineService{db: db}
 }
 
+// ListAll returns all deadlines for a tenant, ordered by due_date
+func (s *DeadlineService) ListAll(tenantID uuid.UUID) ([]models.Deadline, error) {
+	query := `SELECT id, tenant_id, case_id, title, description, due_date, original_due_date,
+	                 warning_date, source, rule_id, status, completed_at,
+	                 caldav_uid, caldav_etag, notes, created_at, updated_at
+	          FROM deadlines
+	          WHERE tenant_id = $1
+	          ORDER BY due_date ASC`
+
+	var deadlines []models.Deadline
+	err := s.db.Select(&deadlines, query, tenantID)
+	if err != nil {
+		return nil, fmt.Errorf("listing all deadlines: %w", err)
+	}
+	return deadlines, nil
+}
+
 // ListForCase returns all deadlines for a case, scoped to tenant
 func (s *DeadlineService) ListForCase(tenantID, caseID uuid.UUID) ([]models.Deadline, error) {
 	query := `SELECT id, tenant_id, case_id, title, description, due_date, original_due_date,

backend/internal/services/tenant_service.go

@@ -3,6 +3,7 @@ package services
 import (
 	"context"
 	"database/sql"
+	"encoding/json"
 	"fmt"
 
 	"github.com/google/uuid"
@@ -173,6 +174,21 @@ func (s *TenantService) InviteByEmail(ctx context.Context, tenantID uuid.UUID, e
 	return &ut, nil
 }
 
+// UpdateSettings merges new settings into the tenant's existing settings JSONB.
+func (s *TenantService) UpdateSettings(ctx context.Context, tenantID uuid.UUID, settings json.RawMessage) (*models.Tenant, error) {
+	var tenant models.Tenant
+	err := s.db.QueryRowxContext(ctx,
+		`UPDATE tenants SET settings = COALESCE(settings, '{}'::jsonb) || $1::jsonb, updated_at = NOW()
+		 WHERE id = $2
+		 RETURNING id, name, slug, settings, created_at, updated_at`,
+		settings, tenantID,
+	).StructScan(&tenant)
+	if err != nil {
+		return nil, fmt.Errorf("update settings: %w", err)
+	}
+	return &tenant, nil
+}
+
 // RemoveMember removes a user from a tenant. Cannot remove the last owner.
 func (s *TenantService) RemoveMember(ctx context.Context, tenantID, userID uuid.UUID) error {
 	// Check if the user being removed is an owner

frontend/bun.lock

@@ -13,6 +13,7 @@
         "next": "15.5.14",
         "react": "19.1.0",
         "react-dom": "19.1.0",
+        "react-dropzone": "^15.0.0",
         "sonner": "^2.0.7",
       },
       "devDependencies": {
@@ -315,6 +316,8 @@
 
     "async-function": ["async-function@1.0.0", "", {}, "sha512-hsU18Ae8CDTR6Kgu9DYf0EbCr/a5iGL0rytQDobUcdpYOKokk8LEjVphnXkDkgpi0wYVsqrXuP0bZxJaTqdgoA=="],
 
+    "attr-accept": ["attr-accept@2.2.5", "", {}, "sha512-0bDNnY/u6pPwHDMoF0FieU354oBi0a8rD9FcsLwzcGWbc8KS8KPIi7y+s13OlVY+gMWc/9xEMUgNE6Qm8ZllYQ=="],
+
     "available-typed-arrays": ["available-typed-arrays@1.0.7", "", { "dependencies": { "possible-typed-array-names": "^1.0.0" } }, "sha512-wvUjBtSGN7+7SjNpq/9M2Tg350UZD3q62IFZLbRAR1bSMlCo1ZaeW+BJ+D090e4hIIZLBcTDWe4Mh4jvUDajzQ=="],
 
     "axe-core": ["axe-core@4.11.1", "", {}, "sha512-BASOg+YwO2C+346x3LZOeoovTIoTrRqEsqMa6fmfAV0P+U9mFr9NsyOEpiYvFjbc64NMrSswhV50WdXzdb/Z5A=="],
@@ -445,6 +448,8 @@
 
     "file-entry-cache": ["file-entry-cache@8.0.0", "", { "dependencies": { "flat-cache": "^4.0.0" } }, "sha512-XXTUwCvisa5oacNGRP9SfNtYBNAMi+RPwBFmblZEF7N7swHYQS6/Zfk7SRwx4D5j3CH211YNRco1DEMNVfZCnQ=="],
 
+    "file-selector": ["file-selector@2.1.2", "", { "dependencies": { "tslib": "^2.7.0" } }, "sha512-QgXo+mXTe8ljeqUFaX3QVHc5osSItJ/Km+xpocx0aSqWGMSCf6qYs/VnzZgS864Pjn5iceMRFigeAV7AfTlaig=="],
+
     "fill-range": ["fill-range@7.1.1", "", { "dependencies": { "to-regex-range": "^5.0.1" } }, "sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg=="],
 
     "find-up": ["find-up@5.0.0", "", { "dependencies": { "locate-path": "^6.0.0", "path-exists": "^4.0.0" } }, "sha512-78/PXT1wlLLDgTzDs7sjq9hzz0vXD+zn+7wypEe4fXQxCmdmqfGsEPQxmiCSQI3ajFV91bVSsvNtrJRiW6nGng=="],
@@ -695,6 +700,8 @@
 
     "react-dom": ["react-dom@19.1.0", "", { "dependencies": { "scheduler": "^0.26.0" }, "peerDependencies": { "react": "^19.1.0" } }, "sha512-Xs1hdnE+DyKgeHJeJznQmYMIBG3TKIHJJT95Q58nHLSrElKlGQqDTR2HQ9fx5CN/Gk6Vh/kupBTDLU11/nDk/g=="],
 
+    "react-dropzone": ["react-dropzone@15.0.0", "", { "dependencies": { "attr-accept": "^2.2.4", "file-selector": "^2.1.0", "prop-types": "^15.8.1" }, "peerDependencies": { "react": ">= 16.8 || 18.0.0" } }, "sha512-lGjYV/EoqEjEWPnmiSvH4v5IoIAwQM2W4Z1C0Q/Pw2xD0eVzKPS359BQTUMum+1fa0kH2nrKjuavmTPOGhpLPg=="],
+
     "react-is": ["react-is@16.13.1", "", {}, "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ=="],
 
     "reflect.getprototypeof": ["reflect.getprototypeof@1.0.10", "", { "dependencies": { "call-bind": "^1.0.8", "define-properties": "^1.2.1", "es-abstract": "^1.23.9", "es-errors": "^1.3.0", "es-object-atoms": "^1.0.0", "get-intrinsic": "^1.2.7", "get-proto": "^1.0.1", "which-builtin-type": "^1.2.1" } }, "sha512-00o4I+DVrefhv+nX0ulyi3biSHCPDe+yLv5o/p6d/UVlirijB8E16FtfwSAi4g3tcqrQ4lRAqQSoFEZJehYEcw=="],

frontend/package.json

@@ -17,6 +17,7 @@
     "next": "15.5.14",
     "react": "19.1.0",
     "react-dom": "19.1.0",
+    "react-dropzone": "^15.0.0",
     "sonner": "^2.0.7"
   },
   "devDependencies": {

frontend/src/app/(app)/ai/extract/page.tsx

@@ -0,0 +1,142 @@
+"use client";
+
+import { useState } from "react";
+import { useQuery } from "@tanstack/react-query";
+import { useRouter } from "next/navigation";
+import { toast } from "sonner";
+import { Brain } from "lucide-react";
+import { api } from "@/lib/api";
+import type {
+  Case,
+  ExtractedDeadline,
+  ExtractionResponse,
+  PaginatedResponse,
+} from "@/lib/types";
+import { ExtractionForm } from "@/components/ai/ExtractionForm";
+import { ExtractionResults } from "@/components/ai/ExtractionResults";
+
+export default function AIExtractPage() {
+  const router = useRouter();
+  const [selectedCaseId, setSelectedCaseId] = useState("");
+  const [isExtracting, setIsExtracting] = useState(false);
+  const [isAdopting, setIsAdopting] = useState(false);
+  const [results, setResults] = useState<ExtractedDeadline[] | null>(null);
+
+  const { data: casesData } = useQuery({
+    queryKey: ["cases"],
+    queryFn: () => api.get<PaginatedResponse<Case>>("/api/cases"),
+  });
+
+  const cases = casesData?.data ?? [];
+
+  async function handleExtract(file: File | null, text: string) {
+    setIsExtracting(true);
+    setResults(null);
+
+    try {
+      let response: ExtractionResponse;
+
+      if (file) {
+        const formData = new FormData();
+        formData.append("file", file);
+        response = await api.postFormData<ExtractionResponse>(
+          "/api/ai/extract-deadlines",
+          formData,
+        );
+      } else {
+        response = await api.post<ExtractionResponse>(
+          "/api/ai/extract-deadlines",
+          { text },
+        );
+      }
+
+      setResults(response.deadlines);
+
+      if (response.count === 0) {
+        toast.info("Keine Fristen im Dokument gefunden.");
+      } else {
+        toast.success(`${response.count} Frist(en) erkannt.`);
+      }
+    } catch (err: unknown) {
+      const message =
+        err && typeof err === "object" && "error" in err
+          ? (err as { error: string }).error
+          : "Analyse fehlgeschlagen";
+      toast.error(message);
+    } finally {
+      setIsExtracting(false);
+    }
+  }
+
+  async function handleAdopt(deadlines: ExtractedDeadline[]) {
+    if (!selectedCaseId) return;
+    setIsAdopting(true);
+
+    try {
+      const promises = deadlines.map((d) =>
+        api.post(`/api/cases/${selectedCaseId}/deadlines`, {
+          title: d.title,
+          due_date: d.due_date ?? "",
+          source: "ai_extraction",
+          notes: [
+            d.rule_reference ? `Rechtsgrundlage: ${d.rule_reference}` : "",
+            d.source_quote ? `Quelle: "${d.source_quote}"` : "",
+            `Konfidenz: ${Math.round(d.confidence * 100)}%`,
+          ]
+            .filter(Boolean)
+            .join("\n"),
+        }),
+      );
+
+      await Promise.all(promises);
+      toast.success(
+        `${deadlines.length} Frist(en) erfolgreich übernommen.`,
+      );
+      router.push(`/cases/${selectedCaseId}`);
+    } catch (err: unknown) {
+      const message =
+        err && typeof err === "object" && "error" in err
+          ? (err as { error: string }).error
+          : "Übernahme fehlgeschlagen";
+      toast.error(message);
+    } finally {
+      setIsAdopting(false);
+    }
+  }
+
+  return (
+    <div className="animate-fade-in mx-auto max-w-4xl">
+      <div className="mb-6 flex items-center gap-3">
+        <Brain className="h-5 w-5 text-neutral-500" />
+        <div>
+          <h1 className="text-lg font-semibold text-neutral-900">
+            AI Fristenanalyse
+          </h1>
+          <p className="text-sm text-neutral-500">
+            Fristen automatisch aus Dokumenten extrahieren
+          </p>
+        </div>
+      </div>
+
+      <div className="rounded-lg border border-neutral-200 bg-white p-4 sm:p-6">
+        <ExtractionForm
+          cases={cases}
+          selectedCaseId={selectedCaseId}
+          onCaseChange={setSelectedCaseId}
+          onExtract={handleExtract}
+          isLoading={isExtracting}
+        />
+      </div>
+
+      {results !== null && (
+        <div className="animate-fade-in mt-6 rounded-lg border border-neutral-200 bg-white p-4 sm:p-6">
+          <ExtractionResults
+            deadlines={results}
+            onAdopt={handleAdopt}
+            isAdopting={isAdopting}
+          />
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/app/(app)/cases/[id]/page.tsx

@@ -6,11 +6,19 @@ import { api } from "@/lib/api";
 import type { Case, CaseEvent, Party, Deadline, Document } from "@/lib/types";
 import { CaseTimeline } from "@/components/cases/CaseTimeline";
 import { PartyList } from "@/components/cases/PartyList";
-import { ArrowLeft, Clock, FileText, Users, Activity } from "lucide-react";
+import {
+  ArrowLeft,
+  Clock,
+  FileText,
+  Users,
+  Activity,
+  AlertTriangle,
+} from "lucide-react";
 import { format } from "date-fns";
 import { de } from "date-fns/locale";
 import Link from "next/link";
 import { useState } from "react";
+import { Skeleton } from "@/components/ui/Skeleton";
 
 interface CaseDetail extends Case {
   parties: Party[];
@@ -25,6 +33,13 @@ const STATUS_BADGE: Record<string, string> = {
   archived: "bg-neutral-100 text-neutral-400",
 };
 
+const STATUS_LABEL: Record<string, string> = {
+  active: "Aktiv",
+  pending: "Anhängig",
+  closed: "Geschlossen",
+  archived: "Archiviert",
+};
+
 const TABS = [
   { key: "timeline", label: "Verlauf", icon: Activity },
   { key: "deadlines", label: "Fristen", icon: Clock },
@@ -34,11 +49,43 @@ const TABS = [
 
 type TabKey = (typeof TABS)[number]["key"];
 
+function CaseDetailSkeleton() {
+  return (
+    <div>
+      <Skeleton className="h-4 w-28" />
+      <div className="mt-4 flex items-start justify-between">
+        <div>
+          <Skeleton className="h-6 w-48" />
+          <Skeleton className="mt-2 h-4 w-64" />
+        </div>
+        <div className="space-y-1">
+          <Skeleton className="h-3 w-24" />
+          <Skeleton className="h-3 w-24" />
+        </div>
+      </div>
+      <div className="mt-6 flex gap-4 border-b border-neutral-200 pb-2.5">
+        {[1, 2, 3, 4].map((i) => (
+          <Skeleton key={i} className="h-4 w-20" />
+        ))}
+      </div>
+      <div className="mt-6 space-y-3">
+        {[1, 2, 3].map((i) => (
+          <Skeleton key={i} className="h-14 rounded-md" />
+        ))}
+      </div>
+    </div>
+  );
+}
+
 export default function CaseDetailPage() {
   const { id } = useParams<{ id: string }>();
   const [activeTab, setActiveTab] = useState<TabKey>("timeline");
 
-  const { data: caseDetail, isLoading } = useQuery({
+  const {
+    data: caseDetail,
+    isLoading,
+    error,
+  } = useQuery({
     queryKey: ["case", id],
     queryFn: () => api.get<CaseDetail>(`/cases/${id}`),
   });
@@ -59,17 +106,28 @@ export default function CaseDetailPage() {
   });
 
   if (isLoading) {
-    return (
-      <div className="py-12 text-center text-sm text-neutral-400">
-        Laden...
-      </div>
-    );
+    return <CaseDetailSkeleton />;
   }
 
-  if (!caseDetail) {
+  if (error || !caseDetail) {
     return (
-      <div className="py-12 text-center text-sm text-neutral-400">
-        Akte nicht gefunden.
+      <div className="py-12 text-center">
+        <div className="mx-auto mb-3 w-fit rounded-xl bg-red-50 p-3">
+          <AlertTriangle className="h-6 w-6 text-red-500" />
+        </div>
+        <p className="text-sm font-medium text-neutral-900">
+          Akte nicht gefunden
+        </p>
+        <p className="mt-1 text-sm text-neutral-500">
+          Die Akte existiert nicht oder Sie haben keine Berechtigung.
+        </p>
+        <Link
+          href="/cases"
+          className="mt-4 inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
+        >
+          <ArrowLeft className="h-3.5 w-3.5" />
+          Zurück zu Akten
+        </Link>
       </div>
     );
   }
@@ -78,28 +136,28 @@ export default function CaseDetailPage() {
   const documents = documentsData ?? [];
 
   return (
-    <div>
+    <div className="animate-fade-in">
       <Link
         href="/cases"
-        className="mb-4 inline-flex items-center gap-1 text-sm text-neutral-500 hover:text-neutral-700"
+        className="mb-4 inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
       >
         <ArrowLeft className="h-3.5 w-3.5" />
-        Zuruck zu Akten
+        Zurück zu Akten
       </Link>
 
-      <div className="flex items-start justify-between">
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-start sm:justify-between">
         <div>
-          <div className="flex items-center gap-3">
+          <div className="flex flex-wrap items-center gap-3">
             <h1 className="text-lg font-semibold text-neutral-900">
               {caseDetail.title}
             </h1>
             <span
               className={`inline-block rounded-full px-2 py-0.5 text-xs font-medium ${STATUS_BADGE[caseDetail.status] ?? "bg-neutral-100 text-neutral-500"}`}
             >
-              {caseDetail.status}
+              {STATUS_LABEL[caseDetail.status] ?? caseDetail.status}
             </span>
           </div>
-          <div className="mt-1 flex gap-4 text-sm text-neutral-500">
+          <div className="mt-1 flex flex-wrap gap-x-4 gap-y-1 text-sm text-neutral-500">
             <span>Az. {caseDetail.case_number}</span>
             {caseDetail.case_type && <span>{caseDetail.case_type}</span>}
             {caseDetail.court && <span>{caseDetail.court}</span>}
@@ -129,12 +187,12 @@ export default function CaseDetailPage() {
       )}
 
       <div className="mt-6 border-b border-neutral-200">
-        <nav className="-mb-px flex gap-4">
+        <nav className="-mb-px flex gap-1 overflow-x-auto sm:gap-4">
           {TABS.map((tab) => (
             <button
               key={tab.key}
               onClick={() => setActiveTab(tab.key)}
-              className={`inline-flex items-center gap-1.5 border-b-2 px-1 pb-2.5 text-sm font-medium transition-colors ${
+              className={`inline-flex shrink-0 items-center gap-1.5 border-b-2 px-1 pb-2.5 text-sm font-medium transition-colors ${
                 activeTab === tab.key
                   ? "border-neutral-900 text-neutral-900"
                   : "border-transparent text-neutral-400 hover:text-neutral-600"
@@ -181,9 +239,14 @@ export default function CaseDetailPage() {
 function DeadlinesList({ deadlines }: { deadlines: Deadline[] }) {
   if (deadlines.length === 0) {
     return (
-      <p className="py-8 text-center text-sm text-neutral-400">
-        Keine Fristen vorhanden.
-      </p>
+      <div className="flex flex-col items-center py-8 text-center">
+        <div className="rounded-xl bg-neutral-100 p-3">
+          <Clock className="h-5 w-5 text-neutral-400" />
+        </div>
+        <p className="mt-2 text-sm text-neutral-500">
+          Keine Fristen vorhanden.
+        </p>
+      </div>
     );
   }
 
@@ -193,12 +256,18 @@ function DeadlinesList({ deadlines }: { deadlines: Deadline[] }) {
     overdue: "bg-red-50 text-red-700",
   };
 
+  const DEADLINE_STATUS_LABEL: Record<string, string> = {
+    pending: "Offen",
+    completed: "Erledigt",
+    overdue: "Überfällig",
+  };
+
   return (
     <div className="space-y-2">
       {deadlines.map((d) => (
         <div
           key={d.id}
-          className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-3"
+          className="flex flex-col gap-2 rounded-md border border-neutral-200 bg-white px-4 py-3 sm:flex-row sm:items-center sm:justify-between"
         >
           <div>
             <p className="text-sm font-medium text-neutral-900">{d.title}</p>
@@ -212,9 +281,9 @@ function DeadlinesList({ deadlines }: { deadlines: Deadline[] }) {
             <span
               className={`rounded-full px-2 py-0.5 text-xs font-medium ${DEADLINE_STATUS[d.status] ?? "bg-neutral-100 text-neutral-500"}`}
             >
-              {d.status}
+              {DEADLINE_STATUS_LABEL[d.status] ?? d.status}
             </span>
-            <span className="text-sm text-neutral-500">
+            <span className="whitespace-nowrap text-sm text-neutral-500">
               {format(new Date(d.due_date), "d. MMM yyyy", { locale: de })}
             </span>
           </div>
@@ -227,9 +296,14 @@ function DeadlinesList({ deadlines }: { deadlines: Deadline[] }) {
 function DocumentsList({ documents }: { documents: Document[] }) {
   if (documents.length === 0) {
     return (
-      <p className="py-8 text-center text-sm text-neutral-400">
-        Keine Dokumente vorhanden.
-      </p>
+      <div className="flex flex-col items-center py-8 text-center">
+        <div className="rounded-xl bg-neutral-100 p-3">
+          <FileText className="h-5 w-5 text-neutral-400" />
+        </div>
+        <p className="mt-2 text-sm text-neutral-500">
+          Keine Dokumente vorhanden.
+        </p>
+      </div>
     );
   }
 
@@ -256,7 +330,7 @@ function DocumentsList({ documents }: { documents: Document[] }) {
           </div>
           <a
             href={`/api/documents/${doc.id}`}
-            className="text-sm text-neutral-500 hover:text-neutral-700"
+            className="text-sm text-neutral-500 transition-colors hover:text-neutral-700"
           >
             Herunterladen
           </a>

frontend/src/app/(app)/cases/new/page.tsx

@@ -26,19 +26,19 @@ export default function NewCasePage() {
   });
 
   return (
-    <div className="mx-auto max-w-2xl">
+    <div className="animate-fade-in mx-auto max-w-2xl">
       <Link
         href="/cases"
-        className="mb-4 inline-flex items-center gap-1 text-sm text-neutral-500 hover:text-neutral-700"
+        className="mb-4 inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
       >
         <ArrowLeft className="h-3.5 w-3.5" />
-        Zuruck zu Akten
+        Zurück zu Akten
       </Link>
       <h1 className="text-lg font-semibold text-neutral-900">Neue Akte</h1>
       <p className="mt-0.5 text-sm text-neutral-500">
         Neue Akte im System anlegen
       </p>
-      <div className="mt-6 rounded-md border border-neutral-200 bg-white p-6">
+      <div className="mt-6 rounded-md border border-neutral-200 bg-white p-4 sm:p-6">
         <CaseForm
           onSubmit={(data) => mutation.mutate(data)}
           isSubmitting={mutation.isPending}

frontend/src/app/(app)/cases/page.tsx

@@ -5,13 +5,15 @@ import { api } from "@/lib/api";
 import type { Case } from "@/lib/types";
 import Link from "next/link";
 import { useSearchParams, useRouter } from "next/navigation";
-import { Plus, Search } from "lucide-react";
+import { Plus, Search, FolderOpen } from "lucide-react";
 import { useState } from "react";
+import { SkeletonTable } from "@/components/ui/Skeleton";
+import { EmptyState } from "@/components/ui/EmptyState";
 
 const STATUS_OPTIONS = [
   { value: "", label: "Alle Status" },
   { value: "active", label: "Aktiv" },
-  { value: "pending", label: "Anhangig" },
+  { value: "pending", label: "Anhängig" },
   { value: "closed", label: "Geschlossen" },
   { value: "archived", label: "Archiviert" },
 ];
@@ -20,9 +22,9 @@ const TYPE_OPTIONS = [
   { value: "", label: "Alle Typen" },
   { value: "INF", label: "Verletzungsklage" },
   { value: "REV", label: "Widerruf" },
-  { value: "CCR", label: "Einstweilige Verfugung" },
+  { value: "CCR", label: "Einstweilige Verfügung" },
   { value: "APP", label: "Berufung" },
-  { value: "PI", label: "Vorlaufiger Rechtsschutz" },
+  { value: "PI", label: "Vorläufiger Rechtsschutz" },
   { value: "ZPO_CIVIL", label: "ZPO Zivilverfahren" },
 ];
 
@@ -33,6 +35,16 @@ const STATUS_BADGE: Record<string, string> = {
   archived: "bg-neutral-100 text-neutral-400",
 };
 
+const STATUS_LABEL: Record<string, string> = {
+  active: "Aktiv",
+  pending: "Anhängig",
+  closed: "Geschlossen",
+  archived: "Archiviert",
+};
+
+const inputClass =
+  "rounded-md border border-neutral-200 bg-white px-2.5 py-1.5 text-sm outline-none transition-colors focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
+
 export default function CasesPage() {
   const router = useRouter();
   const searchParams = useSearchParams();
@@ -59,24 +71,24 @@ export default function CasesPage() {
   const cases = data?.cases ?? [];
 
   return (
-    <div>
-      <div className="flex items-center justify-between">
+    <div className="animate-fade-in">
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
         <div>
           <h1 className="text-lg font-semibold text-neutral-900">Akten</h1>
           <p className="mt-0.5 text-sm text-neutral-500">
-            {data ? `${data.total} Akten` : "Laden..."}
+            {data ? `${data.total} Akten` : "\u00A0"}
           </p>
         </div>
         <Link
           href="/cases/new"
-          className="inline-flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white hover:bg-neutral-800"
+          className="inline-flex w-fit items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
         >
           <Plus className="h-4 w-4" />
           Neue Akte
         </Link>
       </div>
 
-      <div className="mt-4 flex items-center gap-3">
+      <div className="mt-4 flex flex-col gap-3 sm:flex-row sm:items-center">
         <div className="relative flex-1">
           <Search className="absolute left-2.5 top-1/2 h-4 w-4 -translate-y-1/2 text-neutral-400" />
           <input
@@ -84,86 +96,113 @@ export default function CasesPage() {
             placeholder="Suchen nach Aktenzeichen, Titel..."
             value={search}
             onChange={(e) => setSearch(e.target.value)}
-            className="w-full rounded-md border border-neutral-200 bg-white py-1.5 pl-9 pr-3 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+            className={`w-full pl-9 pr-3 ${inputClass}`}
           />
         </div>
-        <select
-          value={status}
-          onChange={(e) => setStatus(e.target.value)}
-          className="rounded-md border border-neutral-200 bg-white px-2.5 py-1.5 text-sm outline-none focus:border-neutral-400"
-        >
-          {STATUS_OPTIONS.map((o) => (
-            <option key={o.value} value={o.value}>
-              {o.label}
-            </option>
-          ))}
-        </select>
-        <select
-          value={type}
-          onChange={(e) => setType(e.target.value)}
-          className="rounded-md border border-neutral-200 bg-white px-2.5 py-1.5 text-sm outline-none focus:border-neutral-400"
-        >
-          {TYPE_OPTIONS.map((o) => (
-            <option key={o.value} value={o.value}>
-              {o.label}
-            </option>
-          ))}
-        </select>
+        <div className="flex gap-3">
+          <select
+            value={status}
+            onChange={(e) => setStatus(e.target.value)}
+            className={inputClass}
+          >
+            {STATUS_OPTIONS.map((o) => (
+              <option key={o.value} value={o.value}>
+                {o.label}
+              </option>
+            ))}
+          </select>
+          <select
+            value={type}
+            onChange={(e) => setType(e.target.value)}
+            className={inputClass}
+          >
+            {TYPE_OPTIONS.map((o) => (
+              <option key={o.value} value={o.value}>
+                {o.label}
+              </option>
+            ))}
+          </select>
+        </div>
       </div>
 
       <div className="mt-4">
         {isLoading ? (
-          <div className="py-12 text-center text-sm text-neutral-400">
-            Laden...
-          </div>
+          <SkeletonTable rows={5} />
         ) : cases.length === 0 ? (
-          <div className="py-12 text-center text-sm text-neutral-400">
-            Keine Akten gefunden.
-          </div>
+          <EmptyState
+            icon={FolderOpen}
+            title="Keine Akten gefunden"
+            description={
+              search || status || type
+                ? "Versuchen Sie andere Suchkriterien."
+                : "Erstellen Sie Ihre erste Akte, um loszulegen."
+            }
+            action={
+              !search && !status && !type ? (
+                <Link
+                  href="/cases/new"
+                  className="inline-flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
+                >
+                  <Plus className="h-4 w-4" />
+                  Neue Akte anlegen
+                </Link>
+              ) : undefined
+            }
+          />
         ) : (
-          <div className="overflow-hidden rounded-md border border-neutral-200 bg-white">
-            <table className="w-full text-sm">
-              <thead>
-                <tr className="border-b border-neutral-100 text-left text-xs font-medium uppercase tracking-wider text-neutral-400">
-                  <th className="px-4 py-2.5">Aktenzeichen</th>
-                  <th className="px-4 py-2.5">Titel</th>
-                  <th className="px-4 py-2.5">Typ</th>
-                  <th className="px-4 py-2.5">Gericht</th>
-                  <th className="px-4 py-2.5">Status</th>
-                  <th className="px-4 py-2.5">Erstellt</th>
-                </tr>
-              </thead>
-              <tbody className="divide-y divide-neutral-100">
-                {cases.map((c) => (
-                  <tr
-                    key={c.id}
-                    onClick={() => router.push(`/cases/${c.id}`)}
-                    className="cursor-pointer hover:bg-neutral-50"
-                  >
-                    <td className="px-4 py-2.5 font-medium text-neutral-900">
-                      {c.case_number}
-                    </td>
-                    <td className="px-4 py-2.5 text-neutral-700">{c.title}</td>
-                    <td className="px-4 py-2.5 text-neutral-500">
-                      {c.case_type ?? "-"}
-                    </td>
-                    <td className="px-4 py-2.5 text-neutral-500">
-                      {c.court ?? "-"}
-                    </td>
-                    <td className="px-4 py-2.5">
-                      <span
-                        className={`inline-block rounded-full px-2 py-0.5 text-xs font-medium ${STATUS_BADGE[c.status] ?? "bg-neutral-100 text-neutral-500"}`}
+          <div className="-mx-4 overflow-x-auto sm:mx-0">
+            <div className="min-w-[640px] sm:min-w-0">
+              <div className="overflow-hidden rounded-md border border-neutral-200 bg-white">
+                <table className="w-full text-sm">
+                  <thead>
+                    <tr className="border-b border-neutral-100 text-left text-xs font-medium uppercase tracking-wider text-neutral-400">
+                      <th className="px-4 py-2.5">Aktenzeichen</th>
+                      <th className="px-4 py-2.5">Titel</th>
+                      <th className="hidden px-4 py-2.5 md:table-cell">Typ</th>
+                      <th className="hidden px-4 py-2.5 lg:table-cell">
+                        Gericht
+                      </th>
+                      <th className="px-4 py-2.5">Status</th>
+                      <th className="hidden px-4 py-2.5 sm:table-cell">
+                        Erstellt
+                      </th>
+                    </tr>
+                  </thead>
+                  <tbody className="divide-y divide-neutral-100">
+                    {cases.map((c) => (
+                      <tr
+                        key={c.id}
+                        onClick={() => router.push(`/cases/${c.id}`)}
+                        className="cursor-pointer transition-colors hover:bg-neutral-50"
                       >
-                        {c.status}
-                      </span>
-                    </td>
-                    <td className="px-4 py-2.5 text-neutral-400">
-                      {new Date(c.created_at).toLocaleDateString("de-DE")}
-                    </td>
-                  </tr>
-                ))}
-              </tbody>
-            </table>
+                        <td className="whitespace-nowrap px-4 py-2.5 font-medium text-neutral-900">
+                          {c.case_number}
+                        </td>
+                        <td className="max-w-[200px] truncate px-4 py-2.5 text-neutral-700">
+                          {c.title}
+                        </td>
+                        <td className="hidden px-4 py-2.5 text-neutral-500 md:table-cell">
+                          {c.case_type ?? "-"}
+                        </td>
+                        <td className="hidden px-4 py-2.5 text-neutral-500 lg:table-cell">
+                          {c.court ?? "-"}
+                        </td>
+                        <td className="px-4 py-2.5">
+                          <span
+                            className={`inline-block rounded-full px-2 py-0.5 text-xs font-medium ${STATUS_BADGE[c.status] ?? "bg-neutral-100 text-neutral-500"}`}
+                          >
+                            {STATUS_LABEL[c.status] ?? c.status}
+                          </span>
+                        </td>
+                        <td className="hidden whitespace-nowrap px-4 py-2.5 text-neutral-400 sm:table-cell">
+                          {new Date(c.created_at).toLocaleDateString("de-DE")}
+                        </td>
+                      </tr>
+                    ))}
+                  </tbody>
+                </table>
+              </div>
+            </div>
           </div>
         )}
       </div>

frontend/src/app/(app)/dashboard/page.tsx

@@ -0,0 +1,100 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { DashboardData } from "@/lib/types";
+import { DeadlineTrafficLights } from "@/components/dashboard/DeadlineTrafficLights";
+import { CaseOverviewGrid } from "@/components/dashboard/CaseOverviewGrid";
+import { UpcomingTimeline } from "@/components/dashboard/UpcomingTimeline";
+import { AISummaryCard } from "@/components/dashboard/AISummaryCard";
+import { QuickActions } from "@/components/dashboard/QuickActions";
+import { Skeleton, SkeletonCard } from "@/components/ui/Skeleton";
+import { AlertTriangle, RefreshCw } from "lucide-react";
+
+function DashboardSkeleton() {
+  return (
+    <div className="mx-auto max-w-6xl space-y-6">
+      <div>
+        <Skeleton className="h-5 w-28" />
+        <Skeleton className="mt-2 h-3.5 w-52" />
+      </div>
+      <div className="grid grid-cols-1 gap-4 sm:grid-cols-3">
+        {[1, 2, 3].map((i) => (
+          <Skeleton key={i} className="h-28 rounded-xl" />
+        ))}
+      </div>
+      <div className="grid grid-cols-1 gap-6 lg:grid-cols-3">
+        <div className="lg:col-span-2">
+          <SkeletonCard className="min-h-[200px]" />
+        </div>
+        <div className="space-y-6">
+          <SkeletonCard />
+          <SkeletonCard />
+          <SkeletonCard />
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default function DashboardPage() {
+  const { data, isLoading, error, refetch } = useQuery({
+    queryKey: ["dashboard"],
+    queryFn: () => api.get<DashboardData>("/dashboard"),
+    refetchInterval: 60_000,
+  });
+
+  if (isLoading) {
+    return <DashboardSkeleton />;
+  }
+
+  if (error || !data) {
+    return (
+      <div className="mx-auto max-w-md py-16 text-center">
+        <div className="mx-auto mb-3 rounded-xl bg-red-50 p-3 w-fit">
+          <AlertTriangle className="h-6 w-6 text-red-500" />
+        </div>
+        <h2 className="text-sm font-medium text-neutral-900">
+          Dashboard konnte nicht geladen werden
+        </h2>
+        <p className="mt-1 text-sm text-neutral-500">
+          Bitte versuchen Sie es erneut oder prüfen Sie Ihre Verbindung.
+        </p>
+        <button
+          onClick={() => refetch()}
+          className="mt-4 inline-flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
+        >
+          <RefreshCw className="h-3.5 w-3.5" />
+          Erneut laden
+        </button>
+      </div>
+    );
+  }
+
+  return (
+    <div className="animate-fade-in mx-auto max-w-6xl space-y-6">
+      <div>
+        <h1 className="text-lg font-semibold text-neutral-900">Dashboard</h1>
+        <p className="mt-0.5 text-sm text-neutral-500">
+          Fristenübersicht und Kanzlei-Status
+        </p>
+      </div>
+
+      <DeadlineTrafficLights data={data.deadline_summary} />
+
+      <div className="grid grid-cols-1 gap-6 lg:grid-cols-3">
+        <div className="lg:col-span-2">
+          <UpcomingTimeline
+            deadlines={data.upcoming_deadlines}
+            appointments={data.upcoming_appointments}
+          />
+        </div>
+        <div className="space-y-6">
+          <CaseOverviewGrid data={data.case_summary} />
+          <AISummaryCard data={data} />
+          <QuickActions />
+        </div>
+      </div>
+    </div>
+  );
+}

frontend/src/app/(app)/einstellungen/page.tsx

@@ -0,0 +1,116 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { Settings, Calendar, Users } from "lucide-react";
+import Link from "next/link";
+import { api } from "@/lib/api";
+import type { Tenant } from "@/lib/types";
+import { CalDAVSettings } from "@/components/settings/CalDAVSettings";
+import { SkeletonCard } from "@/components/ui/Skeleton";
+import { EmptyState } from "@/components/ui/EmptyState";
+
+export default function EinstellungenPage() {
+  const tenantId =
+    typeof window !== "undefined"
+      ? localStorage.getItem("kanzlai_tenant_id")
+      : null;
+
+  const {
+    data: tenant,
+    isLoading,
+    error,
+    refetch,
+  } = useQuery({
+    queryKey: ["tenant-current", tenantId],
+    queryFn: () => api.get<Tenant>(`/api/tenants/${tenantId}`),
+    enabled: !!tenantId,
+  });
+
+  return (
+    <div className="mx-auto max-w-3xl space-y-6 p-4 sm:p-6">
+      <div className="flex items-center justify-between">
+        <h1 className="text-lg font-semibold text-neutral-900">
+          Einstellungen
+        </h1>
+        <Link
+          href="/einstellungen/team"
+          className="inline-flex items-center gap-1.5 rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm font-medium text-neutral-700 hover:bg-neutral-50"
+        >
+          <Users className="h-3.5 w-3.5" />
+          Team verwalten
+        </Link>
+      </div>
+
+      {/* Tenant Info */}
+      {isLoading ? (
+        <>
+          <SkeletonCard />
+          <SkeletonCard />
+        </>
+      ) : error ? (
+        <EmptyState
+          icon={Settings}
+          title="Fehler beim Laden"
+          description="Einstellungen konnten nicht geladen werden."
+          action={
+            <button
+              onClick={() => refetch()}
+              className="rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white hover:bg-neutral-800"
+            >
+              Erneut versuchen
+            </button>
+          }
+        />
+      ) : tenant ? (
+        <>
+          {/* Kanzlei Info */}
+          <section className="rounded-xl border border-neutral-200 bg-white p-5">
+            <div className="flex items-center gap-2.5 border-b border-neutral-100 pb-3">
+              <Settings className="h-4 w-4 text-neutral-500" />
+              <h2 className="text-sm font-semibold text-neutral-900">
+                Kanzlei
+              </h2>
+            </div>
+            <div className="mt-4 grid gap-3 sm:grid-cols-2">
+              <div>
+                <p className="text-xs text-neutral-500">Name</p>
+                <p className="text-sm font-medium text-neutral-900">
+                  {tenant.name}
+                </p>
+              </div>
+              <div>
+                <p className="text-xs text-neutral-500">Slug</p>
+                <p className="text-sm font-medium text-neutral-900">
+                  {tenant.slug}
+                </p>
+              </div>
+              <div>
+                <p className="text-xs text-neutral-500">Erstellt am</p>
+                <p className="text-sm text-neutral-700">
+                  {new Date(tenant.created_at).toLocaleDateString("de-DE", {
+                    day: "2-digit",
+                    month: "2-digit",
+                    year: "numeric",
+                  })}
+                </p>
+              </div>
+            </div>
+          </section>
+
+          {/* CalDAV Settings */}
+          <section className="rounded-xl border border-neutral-200 bg-white p-5">
+            <div className="flex items-center gap-2.5 border-b border-neutral-100 pb-3">
+              <Calendar className="h-4 w-4 text-neutral-500" />
+              <h2 className="text-sm font-semibold text-neutral-900">
+                CalDAV-Synchronisierung
+              </h2>
+            </div>
+            <div className="mt-4">
+              <CalDAVSettings tenant={tenant} />
+            </div>
+          </section>
+        </>
+      ) : null}
+    </div>
+  );
+}

frontend/src/app/(app)/einstellungen/team/page.tsx

@@ -0,0 +1,40 @@
+"use client";
+
+import Link from "next/link";
+import { ArrowLeft, Users } from "lucide-react";
+import { TeamSettings } from "@/components/settings/TeamSettings";
+
+export default function TeamPage() {
+  return (
+    <div className="mx-auto max-w-3xl space-y-6 p-4 sm:p-6">
+      <div className="flex items-center gap-3">
+        <Link
+          href="/einstellungen"
+          className="rounded-md p-1.5 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+        >
+          <ArrowLeft className="h-4 w-4" />
+        </Link>
+        <div className="flex items-center gap-2.5">
+          <Users className="h-4 w-4 text-neutral-500" />
+          <h1 className="text-lg font-semibold text-neutral-900">
+            Team verwalten
+          </h1>
+        </div>
+      </div>
+
+      <section className="rounded-xl border border-neutral-200 bg-white p-5">
+        <div className="border-b border-neutral-100 pb-3">
+          <h2 className="text-sm font-semibold text-neutral-900">
+            Mitglieder
+          </h2>
+          <p className="mt-0.5 text-xs text-neutral-500">
+            Benutzer einladen und Rollen verwalten
+          </p>
+        </div>
+        <div className="mt-4">
+          <TeamSettings />
+        </div>
+      </section>
+    </div>
+  );
+}

frontend/src/app/(app)/fristen/page.tsx

@@ -0,0 +1,73 @@
+"use client";
+
+import { DeadlineList } from "@/components/deadlines/DeadlineList";
+import { DeadlineCalendarView } from "@/components/deadlines/DeadlineCalendarView";
+import { useQuery } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { Deadline } from "@/lib/types";
+import { Calendar, List, Calculator } from "lucide-react";
+import Link from "next/link";
+import { useState } from "react";
+
+type ViewMode = "list" | "calendar";
+
+export default function FristenPage() {
+  const [view, setView] = useState<ViewMode>("list");
+
+  const { data: deadlines } = useQuery({
+    queryKey: ["deadlines"],
+    queryFn: () => api.get<Deadline[]>("/api/deadlines"),
+  });
+
+  return (
+    <div className="animate-fade-in space-y-4">
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
+        <div>
+          <h1 className="text-lg font-semibold text-neutral-900">Fristen</h1>
+          <p className="mt-0.5 text-sm text-neutral-500">
+            Alle Fristen im Überblick
+          </p>
+        </div>
+        <div className="flex items-center gap-2">
+          <Link
+            href="/fristen/rechner"
+            className="flex items-center gap-1.5 rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm text-neutral-700 transition-colors hover:bg-neutral-50"
+          >
+            <Calculator className="h-3.5 w-3.5" />
+            Fristenrechner
+          </Link>
+          <div className="flex rounded-md border border-neutral-200 bg-white">
+            <button
+              onClick={() => setView("list")}
+              className={`flex items-center gap-1 rounded-l-md px-2.5 py-1.5 text-sm transition-colors ${
+                view === "list"
+                  ? "bg-neutral-100 font-medium text-neutral-900"
+                  : "text-neutral-500 hover:text-neutral-700"
+              }`}
+            >
+              <List className="h-3.5 w-3.5" />
+              Liste
+            </button>
+            <button
+              onClick={() => setView("calendar")}
+              className={`flex items-center gap-1 rounded-r-md px-2.5 py-1.5 text-sm transition-colors ${
+                view === "calendar"
+                  ? "bg-neutral-100 font-medium text-neutral-900"
+                  : "text-neutral-500 hover:text-neutral-700"
+              }`}
+            >
+              <Calendar className="h-3.5 w-3.5" />
+              Kalender
+            </button>
+          </div>
+        </div>
+      </div>
+
+      {view === "list" ? (
+        <DeadlineList />
+      ) : (
+        <DeadlineCalendarView deadlines={deadlines || []} />
+      )}
+    </div>
+  );
+}

frontend/src/app/(app)/fristen/rechner/page.tsx

@@ -0,0 +1,28 @@
+"use client";
+
+import { DeadlineCalculator } from "@/components/deadlines/DeadlineCalculator";
+import { ArrowLeft } from "lucide-react";
+import Link from "next/link";
+
+export default function FristenrechnerPage() {
+  return (
+    <div className="animate-fade-in space-y-4">
+      <div>
+        <Link
+          href="/fristen"
+          className="mb-2 inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
+        >
+          <ArrowLeft className="h-3.5 w-3.5" />
+          Zurück zu Fristen
+        </Link>
+        <h1 className="text-lg font-semibold text-neutral-900">
+          Fristenrechner
+        </h1>
+        <p className="mt-0.5 text-sm text-neutral-500">
+          Berechnen Sie Fristen basierend auf Verfahrensart und Auslösedatum
+        </p>
+      </div>
+      <DeadlineCalculator />
+    </div>
+  );
+}

frontend/src/app/(app)/layout.tsx

@@ -13,7 +13,7 @@ export default function AppLayout({
       <Sidebar />
       <div className="flex flex-1 flex-col overflow-hidden">
         <Header />
-        <main className="flex-1 overflow-y-auto p-6">{children}</main>
+        <main className="flex-1 overflow-y-auto p-4 sm:p-6">{children}</main>
       </div>
     </div>
   );

frontend/src/app/(app)/page.tsx

@@ -1,10 +1,5 @@
-export default function DashboardPage() {
-  return (
-    <div>
-      <h1 className="text-lg font-semibold text-neutral-900">Dashboard</h1>
-      <p className="mt-1 text-sm text-neutral-500">
-        Willkommen bei KanzlAI
-      </p>
-    </div>
-  );
+import { redirect } from "next/navigation";
+
+export default function RootPage() {
+  redirect("/dashboard");
 }

frontend/src/app/(app)/termine/page.tsx

@@ -0,0 +1,99 @@
+"use client";
+
+import { AppointmentList } from "@/components/appointments/AppointmentList";
+import { AppointmentCalendar } from "@/components/appointments/AppointmentCalendar";
+import { AppointmentModal } from "@/components/appointments/AppointmentModal";
+import { useQuery } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { Appointment } from "@/lib/types";
+import { Calendar, List, Plus } from "lucide-react";
+import { useState } from "react";
+
+type ViewMode = "list" | "calendar";
+
+export default function TerminePage() {
+  const [view, setView] = useState<ViewMode>("list");
+  const [modalOpen, setModalOpen] = useState(false);
+  const [editingAppointment, setEditingAppointment] = useState<Appointment | null>(null);
+
+  const { data: appointments } = useQuery({
+    queryKey: ["appointments"],
+    queryFn: () => api.get<Appointment[]>("/api/appointments"),
+  });
+
+  function handleEdit(appointment: Appointment) {
+    setEditingAppointment(appointment);
+    setModalOpen(true);
+  }
+
+  function handleCreate() {
+    setEditingAppointment(null);
+    setModalOpen(true);
+  }
+
+  function handleClose() {
+    setModalOpen(false);
+    setEditingAppointment(null);
+  }
+
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <div>
+          <h1 className="text-lg font-semibold text-neutral-900">Termine</h1>
+          <p className="mt-0.5 text-sm text-neutral-500">
+            Alle Termine im Uberblick
+          </p>
+        </div>
+        <div className="flex items-center gap-2">
+          <button
+            onClick={handleCreate}
+            className="flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white hover:bg-neutral-800"
+          >
+            <Plus className="h-3.5 w-3.5" />
+            Neuer Termin
+          </button>
+          <div className="flex rounded-md border border-neutral-200 bg-white">
+            <button
+              onClick={() => setView("list")}
+              className={`flex items-center gap-1 rounded-l-md px-2.5 py-1.5 text-sm transition-colors ${
+                view === "list"
+                  ? "bg-neutral-100 font-medium text-neutral-900"
+                  : "text-neutral-500 hover:text-neutral-700"
+              }`}
+            >
+              <List className="h-3.5 w-3.5" />
+              Liste
+            </button>
+            <button
+              onClick={() => setView("calendar")}
+              className={`flex items-center gap-1 rounded-r-md px-2.5 py-1.5 text-sm transition-colors ${
+                view === "calendar"
+                  ? "bg-neutral-100 font-medium text-neutral-900"
+                  : "text-neutral-500 hover:text-neutral-700"
+              }`}
+            >
+              <Calendar className="h-3.5 w-3.5" />
+              Kalender
+            </button>
+          </div>
+        </div>
+      </div>
+
+      {view === "list" ? (
+        <AppointmentList onEdit={handleEdit} />
+      ) : (
+        <AppointmentCalendar
+          appointments={appointments || []}
+          onAppointmentClick={handleEdit}
+        />
+      )}
+
+      <AppointmentModal
+        open={modalOpen}
+        onClose={handleClose}
+        appointment={editingAppointment}
+      />
+    </div>
+  );
+}

frontend/src/app/globals.css

@@ -9,3 +9,59 @@ body {
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
 }
+
+/* Focus-visible ring for accessibility */
+*:focus-visible {
+  outline: 2px solid #404040;
+  outline-offset: 2px;
+  border-radius: 4px;
+}
+
+input:focus-visible,
+select:focus-visible,
+textarea:focus-visible {
+  outline: none;
+}
+
+@keyframes count-up {
+  0% {
+    transform: translateY(8px);
+    opacity: 0;
+  }
+  100% {
+    transform: translateY(0);
+    opacity: 1;
+  }
+}
+
+.animate-count-up {
+  animation: count-up 0.3s ease-out;
+}
+
+@keyframes fade-in {
+  0% {
+    opacity: 0;
+    transform: translateY(4px);
+  }
+  100% {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.animate-fade-in {
+  animation: fade-in 0.2s ease-out;
+}
+
+@keyframes slide-in-left {
+  0% {
+    transform: translateX(-100%);
+  }
+  100% {
+    transform: translateX(0);
+  }
+}
+
+.animate-slide-in-left {
+  animation: slide-in-left 0.2s ease-out;
+}

frontend/src/components/ai/ExtractionForm.tsx

@@ -0,0 +1,172 @@
+"use client";
+
+import { useCallback, useState } from "react";
+import { useDropzone } from "react-dropzone";
+import { Upload, FileText, X, Loader2 } from "lucide-react";
+import type { Case } from "@/lib/types";
+
+interface ExtractionFormProps {
+  cases: Case[];
+  selectedCaseId: string;
+  onCaseChange: (caseId: string) => void;
+  onExtract: (file: File | null, text: string) => void;
+  isLoading: boolean;
+}
+
+const inputClass =
+  "w-full rounded-md border border-neutral-200 bg-white px-3 py-2 text-sm text-neutral-900 outline-none transition-colors focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
+
+export function ExtractionForm({
+  cases,
+  selectedCaseId,
+  onCaseChange,
+  onExtract,
+  isLoading,
+}: ExtractionFormProps) {
+  const [file, setFile] = useState<File | null>(null);
+  const [text, setText] = useState("");
+
+  const onDrop = useCallback((acceptedFiles: File[]) => {
+    if (acceptedFiles.length > 0) {
+      setFile(acceptedFiles[0]);
+      setText("");
+    }
+  }, []);
+
+  const { getRootProps, getInputProps, isDragActive } = useDropzone({
+    onDrop,
+    accept: { "application/pdf": [".pdf"] },
+    maxFiles: 1,
+    disabled: isLoading,
+  });
+
+  function removeFile() {
+    setFile(null);
+  }
+
+  function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!selectedCaseId || (!file && !text.trim())) return;
+    onExtract(file, text.trim());
+  }
+
+  const hasInput = file !== null || text.trim().length > 0;
+
+  return (
+    <form onSubmit={handleSubmit} className="space-y-5">
+      {/* Case selector */}
+      <div>
+        <label
+          htmlFor="case-select"
+          className="mb-1.5 block text-sm font-medium text-neutral-700"
+        >
+          Akte
+        </label>
+        <select
+          id="case-select"
+          value={selectedCaseId}
+          onChange={(e) => onCaseChange(e.target.value)}
+          className={inputClass}
+          disabled={isLoading}
+        >
+          <option value="">Akte auswählen...</option>
+          {cases.map((c) => (
+            <option key={c.id} value={c.id}>
+              {c.case_number} - {c.title}
+            </option>
+          ))}
+        </select>
+      </div>
+
+      {/* PDF dropzone */}
+      <div>
+        <label className="mb-1.5 block text-sm font-medium text-neutral-700">
+          PDF hochladen
+        </label>
+        {file ? (
+          <div className="flex items-center gap-3 rounded-md border border-neutral-200 bg-neutral-50 px-4 py-3">
+            <FileText className="h-5 w-5 shrink-0 text-neutral-500" />
+            <div className="min-w-0 flex-1">
+              <p className="truncate text-sm font-medium text-neutral-900">
+                {file.name}
+              </p>
+              <p className="text-xs text-neutral-500">
+                {(file.size / 1024).toFixed(0)} KB
+              </p>
+            </div>
+            <button
+              type="button"
+              onClick={removeFile}
+              disabled={isLoading}
+              className="rounded p-1 text-neutral-400 transition-colors hover:bg-neutral-200 hover:text-neutral-600"
+            >
+              <X className="h-4 w-4" />
+            </button>
+          </div>
+        ) : (
+          <div
+            {...getRootProps()}
+            className={`cursor-pointer rounded-md border-2 border-dashed px-6 py-8 text-center transition-colors ${
+              isDragActive
+                ? "border-neutral-500 bg-neutral-50"
+                : "border-neutral-300 hover:border-neutral-400"
+            } ${isLoading ? "pointer-events-none opacity-50" : ""}`}
+          >
+            <input {...getInputProps()} />
+            <Upload className="mx-auto h-8 w-8 text-neutral-400" />
+            <p className="mt-2 text-sm text-neutral-600">
+              PDF hierher ziehen oder{" "}
+              <span className="font-medium text-neutral-900">durchsuchen</span>
+            </p>
+            <p className="mt-1 text-xs text-neutral-400">Nur PDF-Dateien</p>
+          </div>
+        )}
+      </div>
+
+      {/* Divider */}
+      <div className="flex items-center gap-3">
+        <div className="h-px flex-1 bg-neutral-200" />
+        <span className="text-xs text-neutral-400">oder</span>
+        <div className="h-px flex-1 bg-neutral-200" />
+      </div>
+
+      {/* Text input */}
+      <div>
+        <label
+          htmlFor="text-input"
+          className="mb-1.5 block text-sm font-medium text-neutral-700"
+        >
+          Text eingeben
+        </label>
+        <textarea
+          id="text-input"
+          value={text}
+          onChange={(e) => {
+            setText(e.target.value);
+            if (e.target.value.trim()) setFile(null);
+          }}
+          placeholder="Gerichtsschriftsatz, Beschluss oder sonstigen Text hier einfügen..."
+          rows={6}
+          disabled={isLoading}
+          className={`${inputClass} resize-y placeholder:text-neutral-400 disabled:opacity-50`}
+        />
+      </div>
+
+      {/* Submit */}
+      <button
+        type="submit"
+        disabled={isLoading || !hasInput || !selectedCaseId}
+        className="inline-flex items-center gap-2 rounded-md bg-neutral-900 px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:cursor-not-allowed disabled:opacity-50"
+      >
+        {isLoading ? (
+          <>
+            <Loader2 className="h-4 w-4 animate-spin" />
+            Analysiere...
+          </>
+        ) : (
+          "Analysieren"
+        )}
+      </button>
+    </form>
+  );
+}

frontend/src/components/ai/ExtractionResults.tsx

@@ -0,0 +1,292 @@
+"use client";
+
+import { useState } from "react";
+import { Trash2, Check, Pencil, X, Loader2, Brain } from "lucide-react";
+import type { ExtractedDeadline } from "@/lib/types";
+
+interface ExtractionResultsProps {
+  deadlines: ExtractedDeadline[];
+  onAdopt: (deadlines: ExtractedDeadline[]) => void;
+  isAdopting: boolean;
+}
+
+function confidenceColor(confidence: number): string {
+  if (confidence >= 0.8) return "bg-green-100 text-green-800";
+  if (confidence >= 0.5) return "bg-yellow-100 text-yellow-800";
+  return "bg-red-100 text-red-800";
+}
+
+function confidenceLabel(confidence: number): string {
+  if (confidence >= 0.8) return "Hoch";
+  if (confidence >= 0.5) return "Mittel";
+  return "Niedrig";
+}
+
+const editInputClass =
+  "w-full rounded border border-neutral-300 px-2 py-1 text-sm outline-none transition-colors focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
+
+export function ExtractionResults({
+  deadlines: initialDeadlines,
+  onAdopt,
+  isAdopting,
+}: ExtractionResultsProps) {
+  const [deadlines, setDeadlines] = useState(initialDeadlines);
+  const [editingIndex, setEditingIndex] = useState<number | null>(null);
+  const [editForm, setEditForm] = useState<ExtractedDeadline | null>(null);
+
+  function removeDeadline(index: number) {
+    setDeadlines((prev) => prev.filter((_, i) => i !== index));
+  }
+
+  function startEdit(index: number) {
+    setEditingIndex(index);
+    setEditForm({ ...deadlines[index] });
+  }
+
+  function cancelEdit() {
+    setEditingIndex(null);
+    setEditForm(null);
+  }
+
+  function saveEdit() {
+    if (editingIndex === null || !editForm) return;
+    setDeadlines((prev) =>
+      prev.map((d, i) => (i === editingIndex ? editForm : d)),
+    );
+    setEditingIndex(null);
+    setEditForm(null);
+  }
+
+  if (deadlines.length === 0) {
+    return (
+      <div className="flex flex-col items-center py-8 text-center">
+        <div className="rounded-xl bg-neutral-100 p-3">
+          <Brain className="h-5 w-5 text-neutral-400" />
+        </div>
+        <p className="mt-2 text-sm text-neutral-500">
+          Keine Fristen gefunden. Alle extrahierten Fristen wurden entfernt.
+        </p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-4">
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
+        <h3 className="text-sm font-medium text-neutral-900">
+          {deadlines.length} Frist{deadlines.length !== 1 ? "en" : ""} erkannt
+        </h3>
+        <button
+          onClick={() => onAdopt(deadlines)}
+          disabled={isAdopting || deadlines.length === 0}
+          className="inline-flex items-center gap-2 rounded-md bg-neutral-900 px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:cursor-not-allowed disabled:opacity-50"
+        >
+          {isAdopting ? (
+            <>
+              <Loader2 className="h-4 w-4 animate-spin" />
+              Übernehme...
+            </>
+          ) : (
+            <>
+              <Check className="h-4 w-4" />
+              Fristen übernehmen
+            </>
+          )}
+        </button>
+      </div>
+
+      {/* Mobile: card layout, Desktop: table */}
+      <div className="hidden overflow-hidden rounded-md border border-neutral-200 sm:block">
+        <table className="w-full text-sm">
+          <thead>
+            <tr className="border-b border-neutral-200 bg-neutral-50">
+              <th className="px-4 py-2.5 text-left font-medium text-neutral-700">
+                Frist
+              </th>
+              <th className="px-4 py-2.5 text-left font-medium text-neutral-700">
+                Fälligkeitsdatum
+              </th>
+              <th className="px-4 py-2.5 text-left font-medium text-neutral-700">
+                Rechtsgrundlage
+              </th>
+              <th className="px-4 py-2.5 text-left font-medium text-neutral-700">
+                Konfidenz
+              </th>
+              <th className="hidden px-4 py-2.5 text-left font-medium text-neutral-700 lg:table-cell">
+                Quellenangabe
+              </th>
+              <th className="px-4 py-2.5 text-right font-medium text-neutral-700">
+                Aktionen
+              </th>
+            </tr>
+          </thead>
+          <tbody>
+            {deadlines.map((d, i) => (
+              <tr
+                key={i}
+                className="border-b border-neutral-100 transition-colors last:border-b-0 hover:bg-neutral-50"
+              >
+                {editingIndex === i && editForm ? (
+                  <>
+                    <td className="px-4 py-2">
+                      <input
+                        value={editForm.title}
+                        onChange={(e) =>
+                          setEditForm({ ...editForm, title: e.target.value })
+                        }
+                        className={editInputClass}
+                      />
+                    </td>
+                    <td className="px-4 py-2">
+                      <input
+                        type="date"
+                        value={editForm.due_date ?? ""}
+                        onChange={(e) =>
+                          setEditForm({
+                            ...editForm,
+                            due_date: e.target.value || null,
+                          })
+                        }
+                        className={editInputClass}
+                      />
+                    </td>
+                    <td className="px-4 py-2">
+                      <input
+                        value={editForm.rule_reference}
+                        onChange={(e) =>
+                          setEditForm({
+                            ...editForm,
+                            rule_reference: e.target.value,
+                          })
+                        }
+                        className={editInputClass}
+                      />
+                    </td>
+                    <td className="px-4 py-2">
+                      <span
+                        className={`inline-block rounded-full px-2 py-0.5 text-xs font-medium ${confidenceColor(editForm.confidence)}`}
+                      >
+                        {confidenceLabel(editForm.confidence)}
+                      </span>
+                    </td>
+                    <td className="hidden px-4 py-2 text-xs text-neutral-500 lg:table-cell">
+                      {editForm.source_quote}
+                    </td>
+                    <td className="px-4 py-2 text-right">
+                      <div className="flex items-center justify-end gap-1">
+                        <button
+                          onClick={saveEdit}
+                          className="rounded p-1 text-green-600 transition-colors hover:bg-green-50"
+                          title="Speichern"
+                        >
+                          <Check className="h-4 w-4" />
+                        </button>
+                        <button
+                          onClick={cancelEdit}
+                          className="rounded p-1 text-neutral-400 transition-colors hover:bg-neutral-100"
+                          title="Abbrechen"
+                        >
+                          <X className="h-4 w-4" />
+                        </button>
+                      </div>
+                    </td>
+                  </>
+                ) : (
+                  <>
+                    <td className="px-4 py-2.5 font-medium text-neutral-900">
+                      {d.title}
+                    </td>
+                    <td className="px-4 py-2.5 text-neutral-700">
+                      {d.due_date
+                        ? new Date(d.due_date).toLocaleDateString("de-DE")
+                        : `${d.duration_value} ${d.duration_unit}`}
+                    </td>
+                    <td className="px-4 py-2.5 text-neutral-600">
+                      {d.rule_reference || "-"}
+                    </td>
+                    <td className="px-4 py-2.5">
+                      <span
+                        className={`inline-block rounded-full px-2 py-0.5 text-xs font-medium ${confidenceColor(d.confidence)}`}
+                      >
+                        {confidenceLabel(d.confidence)}{" "}
+                        {Math.round(d.confidence * 100)}%
+                      </span>
+                    </td>
+                    <td className="hidden max-w-48 truncate px-4 py-2.5 text-xs text-neutral-500 lg:table-cell">
+                      {d.source_quote || "-"}
+                    </td>
+                    <td className="px-4 py-2.5 text-right">
+                      <div className="flex items-center justify-end gap-1">
+                        <button
+                          onClick={() => startEdit(i)}
+                          className="rounded p-1 text-neutral-400 transition-colors hover:bg-neutral-100 hover:text-neutral-600"
+                          title="Bearbeiten"
+                        >
+                          <Pencil className="h-3.5 w-3.5" />
+                        </button>
+                        <button
+                          onClick={() => removeDeadline(i)}
+                          className="rounded p-1 text-neutral-400 transition-colors hover:bg-red-50 hover:text-red-600"
+                          title="Entfernen"
+                        >
+                          <Trash2 className="h-3.5 w-3.5" />
+                        </button>
+                      </div>
+                    </td>
+                  </>
+                )}
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+
+      {/* Mobile card layout */}
+      <div className="space-y-3 sm:hidden">
+        {deadlines.map((d, i) => (
+          <div
+            key={i}
+            className="rounded-md border border-neutral-200 bg-white p-4"
+          >
+            <div className="flex items-start justify-between gap-2">
+              <p className="text-sm font-medium text-neutral-900">{d.title}</p>
+              <div className="flex shrink-0 items-center gap-1">
+                <button
+                  onClick={() => startEdit(i)}
+                  className="rounded p-1 text-neutral-400 transition-colors hover:bg-neutral-100 hover:text-neutral-600"
+                >
+                  <Pencil className="h-3.5 w-3.5" />
+                </button>
+                <button
+                  onClick={() => removeDeadline(i)}
+                  className="rounded p-1 text-neutral-400 transition-colors hover:bg-red-50 hover:text-red-600"
+                >
+                  <Trash2 className="h-3.5 w-3.5" />
+                </button>
+              </div>
+            </div>
+            <div className="mt-2 flex flex-wrap gap-2 text-xs text-neutral-500">
+              <span>
+                {d.due_date
+                  ? new Date(d.due_date).toLocaleDateString("de-DE")
+                  : `${d.duration_value} ${d.duration_unit}`}
+              </span>
+              {d.rule_reference && (
+                <>
+                  <span>·</span>
+                  <span>{d.rule_reference}</span>
+                </>
+              )}
+              <span
+                className={`rounded-full px-2 py-0.5 font-medium ${confidenceColor(d.confidence)}`}
+              >
+                {confidenceLabel(d.confidence)} {Math.round(d.confidence * 100)}
+                %
+              </span>
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

frontend/src/components/appointments/AppointmentCalendar.tsx

@@ -0,0 +1,160 @@
+"use client";
+
+import type { Appointment } from "@/lib/types";
+import {
+  format,
+  startOfMonth,
+  endOfMonth,
+  startOfWeek,
+  endOfWeek,
+  eachDayOfInterval,
+  isSameMonth,
+  isToday,
+  parseISO,
+  addMonths,
+  subMonths,
+} from "date-fns";
+import { de } from "date-fns/locale";
+import { ChevronLeft, ChevronRight } from "lucide-react";
+import { useState, useMemo } from "react";
+
+const TYPE_DOT_COLORS: Record<string, string> = {
+  hearing: "bg-blue-500",
+  meeting: "bg-violet-500",
+  consultation: "bg-emerald-500",
+  deadline_hearing: "bg-amber-500",
+  other: "bg-neutral-400",
+};
+
+interface AppointmentCalendarProps {
+  appointments: Appointment[];
+  onDayClick?: (date: string) => void;
+  onAppointmentClick?: (appointment: Appointment) => void;
+}
+
+export function AppointmentCalendar({
+  appointments,
+  onDayClick,
+  onAppointmentClick,
+}: AppointmentCalendarProps) {
+  const [currentMonth, setCurrentMonth] = useState(new Date());
+
+  const monthStart = startOfMonth(currentMonth);
+  const monthEnd = endOfMonth(currentMonth);
+  const calStart = startOfWeek(monthStart, { weekStartsOn: 1 });
+  const calEnd = endOfWeek(monthEnd, { weekStartsOn: 1 });
+  const days = eachDayOfInterval({ start: calStart, end: calEnd });
+
+  const appointmentsByDay = useMemo(() => {
+    const map = new Map<string, Appointment[]>();
+    for (const a of appointments) {
+      const key = a.start_at.slice(0, 10);
+      const existing = map.get(key) || [];
+      existing.push(a);
+      map.set(key, existing);
+    }
+    return map;
+  }, [appointments]);
+
+  const weekDays = ["Mo", "Di", "Mi", "Do", "Fr", "Sa", "So"];
+
+  return (
+    <div className="rounded-lg border border-neutral-200 bg-white">
+      {/* Header */}
+      <div className="flex items-center justify-between border-b border-neutral-200 px-4 py-3">
+        <button
+          onClick={() => setCurrentMonth(subMonths(currentMonth, 1))}
+          className="rounded-md p-1 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+        >
+          <ChevronLeft className="h-4 w-4" />
+        </button>
+        <span className="text-sm font-medium text-neutral-900">
+          {format(currentMonth, "MMMM yyyy", { locale: de })}
+        </span>
+        <button
+          onClick={() => setCurrentMonth(addMonths(currentMonth, 1))}
+          className="rounded-md p-1 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+        >
+          <ChevronRight className="h-4 w-4" />
+        </button>
+      </div>
+
+      {/* Weekday labels */}
+      <div className="grid grid-cols-7 border-b border-neutral-100">
+        {weekDays.map((d) => (
+          <div key={d} className="px-2 py-2 text-center text-xs font-medium text-neutral-400">
+            {d}
+          </div>
+        ))}
+      </div>
+
+      {/* Days grid */}
+      <div className="grid grid-cols-7">
+        {days.map((day, i) => {
+          const key = format(day, "yyyy-MM-dd");
+          const dayAppointments = appointmentsByDay.get(key) || [];
+          const inMonth = isSameMonth(day, currentMonth);
+          const today = isToday(day);
+
+          return (
+            <div
+              key={i}
+              onClick={() => onDayClick?.(key)}
+              className={`min-h-[5rem] cursor-pointer border-b border-r border-neutral-100 p-1.5 transition-colors hover:bg-neutral-50 ${
+                !inMonth ? "bg-neutral-50/50" : ""
+              }`}
+            >
+              <div
+                className={`mb-1 text-right text-xs ${
+                  today
+                    ? "font-bold text-neutral-900"
+                    : inMonth
+                      ? "text-neutral-600"
+                      : "text-neutral-300"
+                }`}
+              >
+                {today ? (
+                  <span className="inline-flex h-5 w-5 items-center justify-center rounded-full bg-neutral-900 text-white">
+                    {format(day, "d")}
+                  </span>
+                ) : (
+                  format(day, "d")
+                )}
+              </div>
+              <div className="space-y-0.5">
+                {dayAppointments.slice(0, 3).map((appt) => {
+                  const dotColor =
+                    TYPE_DOT_COLORS[appt.appointment_type ?? "other"] ?? TYPE_DOT_COLORS.other;
+                  return (
+                    <div
+                      key={appt.id}
+                      onClick={(e) => {
+                        e.stopPropagation();
+                        onAppointmentClick?.(appt);
+                      }}
+                      className="flex items-center gap-1 truncate rounded px-0.5 hover:bg-neutral-100"
+                      title={`${format(parseISO(appt.start_at), "HH:mm")} ${appt.title}`}
+                    >
+                      <div className={`h-1.5 w-1.5 shrink-0 rounded-full ${dotColor}`} />
+                      <span className="truncate text-[10px] text-neutral-700">
+                        <span className="font-medium">
+                          {format(parseISO(appt.start_at), "HH:mm")}
+                        </span>{" "}
+                        {appt.title}
+                      </span>
+                    </div>
+                  );
+                })}
+                {dayAppointments.length > 3 && (
+                  <div className="text-[10px] text-neutral-400">
+                    +{dayAppointments.length - 3} mehr
+                  </div>
+                )}
+              </div>
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}

frontend/src/components/appointments/AppointmentList.tsx

@@ -0,0 +1,265 @@
+"use client";
+
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { Appointment, Case } from "@/lib/types";
+import { format, parseISO, isToday, isTomorrow, isThisWeek, isPast } from "date-fns";
+import { de } from "date-fns/locale";
+import { Calendar, Filter, MapPin, Trash2 } from "lucide-react";
+import { toast } from "sonner";
+import { useState, useMemo } from "react";
+
+const TYPE_LABELS: Record<string, string> = {
+  hearing: "Verhandlung",
+  meeting: "Besprechung",
+  consultation: "Beratung",
+  deadline_hearing: "Fristanhorung",
+  other: "Sonstiges",
+};
+
+const TYPE_COLORS: Record<string, string> = {
+  hearing: "bg-blue-100 text-blue-700",
+  meeting: "bg-violet-100 text-violet-700",
+  consultation: "bg-emerald-100 text-emerald-700",
+  deadline_hearing: "bg-amber-100 text-amber-700",
+  other: "bg-neutral-100 text-neutral-600",
+};
+
+interface AppointmentListProps {
+  onEdit: (appointment: Appointment) => void;
+}
+
+function groupByDate(appointments: Appointment[]): Map<string, Appointment[]> {
+  const groups = new Map<string, Appointment[]>();
+  for (const a of appointments) {
+    const key = a.start_at.slice(0, 10);
+    const group = groups.get(key) || [];
+    group.push(a);
+    groups.set(key, group);
+  }
+  return groups;
+}
+
+function formatDateLabel(dateStr: string): string {
+  const d = parseISO(dateStr);
+  if (isToday(d)) return "Heute";
+  if (isTomorrow(d)) return "Morgen";
+  return format(d, "EEEE, d. MMMM yyyy", { locale: de });
+}
+
+export function AppointmentList({ onEdit }: AppointmentListProps) {
+  const queryClient = useQueryClient();
+  const [caseFilter, setCaseFilter] = useState("all");
+  const [typeFilter, setTypeFilter] = useState("all");
+
+  const { data: appointments, isLoading } = useQuery({
+    queryKey: ["appointments"],
+    queryFn: () => api.get<Appointment[]>("/api/appointments"),
+  });
+
+  const { data: cases } = useQuery({
+    queryKey: ["cases"],
+    queryFn: () => api.get<{ cases: Case[]; total: number }>("/api/cases"),
+  });
+
+  const deleteMutation = useMutation({
+    mutationFn: (id: string) => api.delete(`/api/appointments/${id}`),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["appointments"] });
+      toast.success("Termin geloscht");
+    },
+    onError: () => toast.error("Fehler beim Loschen"),
+  });
+
+  const caseMap = useMemo(() => {
+    const map = new Map<string, Case>();
+    cases?.cases?.forEach((c) => map.set(c.id, c));
+    return map;
+  }, [cases]);
+
+  const filtered = useMemo(() => {
+    if (!appointments) return [];
+    return appointments
+      .filter((a) => {
+        if (caseFilter !== "all" && a.case_id !== caseFilter) return false;
+        if (typeFilter !== "all" && a.appointment_type !== typeFilter) return false;
+        return true;
+      })
+      .sort((a, b) => a.start_at.localeCompare(b.start_at));
+  }, [appointments, caseFilter, typeFilter]);
+
+  const grouped = useMemo(() => groupByDate(filtered), [filtered]);
+
+  const counts = useMemo(() => {
+    if (!appointments) return { today: 0, thisWeek: 0, total: 0 };
+    let today = 0;
+    let thisWeek = 0;
+    for (const a of appointments) {
+      const d = parseISO(a.start_at);
+      if (isToday(d)) today++;
+      if (isThisWeek(d, { weekStartsOn: 1 })) thisWeek++;
+    }
+    return { today, thisWeek, total: appointments.length };
+  }, [appointments]);
+
+  if (isLoading) {
+    return (
+      <div className="space-y-3">
+        {[1, 2, 3, 4].map((i) => (
+          <div key={i} className="h-16 animate-pulse rounded-lg bg-neutral-100" />
+        ))}
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-4">
+      {/* Summary cards */}
+      <div className="grid grid-cols-3 gap-3">
+        <div className="rounded-lg border border-neutral-200 bg-white p-3">
+          <div className="text-2xl font-semibold text-neutral-900">{counts.today}</div>
+          <div className="text-xs text-neutral-500">Heute</div>
+        </div>
+        <div className="rounded-lg border border-neutral-200 bg-white p-3">
+          <div className="text-2xl font-semibold text-neutral-900">{counts.thisWeek}</div>
+          <div className="text-xs text-neutral-500">Diese Woche</div>
+        </div>
+        <div className="rounded-lg border border-neutral-200 bg-white p-3">
+          <div className="text-2xl font-semibold text-neutral-900">{counts.total}</div>
+          <div className="text-xs text-neutral-500">Gesamt</div>
+        </div>
+      </div>
+
+      {/* Filters */}
+      <div className="flex items-center gap-3">
+        <div className="flex items-center gap-1.5 text-sm text-neutral-500">
+          <Filter className="h-3.5 w-3.5" />
+          <span>Filter:</span>
+        </div>
+        <select
+          value={typeFilter}
+          onChange={(e) => setTypeFilter(e.target.value)}
+          className="rounded-md border border-neutral-200 bg-white px-2.5 py-1 text-sm text-neutral-700"
+        >
+          <option value="all">Alle Typen</option>
+          {Object.entries(TYPE_LABELS).map(([value, label]) => (
+            <option key={value} value={value}>
+              {label}
+            </option>
+          ))}
+        </select>
+        {cases?.cases && cases.cases.length > 0 && (
+          <select
+            value={caseFilter}
+            onChange={(e) => setCaseFilter(e.target.value)}
+            className="rounded-md border border-neutral-200 bg-white px-2.5 py-1 text-sm text-neutral-700"
+          >
+            <option value="all">Alle Akten</option>
+            {cases.cases.map((c) => (
+              <option key={c.id} value={c.id}>
+                {c.case_number} — {c.title}
+              </option>
+            ))}
+          </select>
+        )}
+      </div>
+
+      {/* Grouped list */}
+      {filtered.length === 0 ? (
+        <div className="rounded-lg border border-neutral-200 bg-white p-8 text-center">
+          <Calendar className="mx-auto h-8 w-8 text-neutral-300" />
+          <p className="mt-2 text-sm text-neutral-500">Keine Termine gefunden</p>
+        </div>
+      ) : (
+        <div className="space-y-4">
+          {Array.from(grouped.entries()).map(([dateKey, dayAppointments]) => {
+            const dateIsPast = isPast(parseISO(dateKey + "T23:59:59"));
+            return (
+              <div key={dateKey}>
+                <div className={`mb-2 text-xs font-medium uppercase tracking-wider ${dateIsPast ? "text-neutral-400" : "text-neutral-600"}`}>
+                  {formatDateLabel(dateKey)}
+                </div>
+                <div className="space-y-1.5">
+                  {dayAppointments.map((appt) => {
+                    const caseInfo = appt.case_id ? caseMap.get(appt.case_id) : null;
+                    const typeBadge = appt.appointment_type
+                      ? TYPE_COLORS[appt.appointment_type] ?? TYPE_COLORS.other
+                      : null;
+                    const typeLabel = appt.appointment_type
+                      ? TYPE_LABELS[appt.appointment_type] ?? appt.appointment_type
+                      : null;
+
+                    return (
+                      <div
+                        key={appt.id}
+                        onClick={() => onEdit(appt)}
+                        className={`flex cursor-pointer items-start gap-3 rounded-lg border px-4 py-3 transition-colors hover:bg-neutral-50 ${
+                          dateIsPast
+                            ? "border-neutral-150 bg-neutral-50/50"
+                            : "border-neutral-200 bg-white"
+                        }`}
+                      >
+                        <div className="shrink-0 pt-0.5 text-center">
+                          <div className="text-xs font-medium text-neutral-900">
+                            {format(parseISO(appt.start_at), "HH:mm")}
+                          </div>
+                          {appt.end_at && (
+                            <div className="text-[10px] text-neutral-400">
+                              {format(parseISO(appt.end_at), "HH:mm")}
+                            </div>
+                          )}
+                        </div>
+                        <div className="min-w-0 flex-1">
+                          <div className="flex items-center gap-2">
+                            <span className={`truncate text-sm font-medium ${dateIsPast ? "text-neutral-500" : "text-neutral-900"}`}>
+                              {appt.title}
+                            </span>
+                            {typeBadge && typeLabel && (
+                              <span className={`shrink-0 rounded px-1.5 py-0.5 text-xs font-medium ${typeBadge}`}>
+                                {typeLabel}
+                              </span>
+                            )}
+                          </div>
+                          <div className="mt-0.5 flex items-center gap-2 text-xs text-neutral-500">
+                            {appt.location && (
+                              <span className="flex items-center gap-0.5">
+                                <MapPin className="h-3 w-3" />
+                                {appt.location}
+                              </span>
+                            )}
+                            {appt.location && caseInfo && <span>·</span>}
+                            {caseInfo && (
+                              <span className="truncate">
+                                {caseInfo.case_number} — {caseInfo.title}
+                              </span>
+                            )}
+                          </div>
+                          {appt.description && (
+                            <p className="mt-1 truncate text-xs text-neutral-400">
+                              {appt.description}
+                            </p>
+                          )}
+                        </div>
+                        <button
+                          onClick={(e) => {
+                            e.stopPropagation();
+                            deleteMutation.mutate(appt.id);
+                          }}
+                          disabled={deleteMutation.isPending}
+                          title="Loschen"
+                          className="shrink-0 rounded-md p-1.5 text-neutral-300 hover:bg-red-50 hover:text-red-500"
+                        >
+                          <Trash2 className="h-3.5 w-3.5" />
+                        </button>
+                      </div>
+                    );
+                  })}
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/appointments/AppointmentModal.tsx

@@ -0,0 +1,280 @@
+"use client";
+
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { Appointment, Case } from "@/lib/types";
+import { format, parseISO } from "date-fns";
+import { X } from "lucide-react";
+import { toast } from "sonner";
+import { useEffect, useState } from "react";
+
+const APPOINTMENT_TYPES = [
+  { value: "hearing", label: "Verhandlung" },
+  { value: "meeting", label: "Besprechung" },
+  { value: "consultation", label: "Beratung" },
+  { value: "deadline_hearing", label: "Fristanhorung" },
+  { value: "other", label: "Sonstiges" },
+];
+
+interface AppointmentModalProps {
+  open: boolean;
+  onClose: () => void;
+  appointment?: Appointment | null;
+}
+
+function toLocalDatetime(iso: string): string {
+  const d = parseISO(iso);
+  return format(d, "yyyy-MM-dd'T'HH:mm");
+}
+
+export function AppointmentModal({ open, onClose, appointment }: AppointmentModalProps) {
+  const queryClient = useQueryClient();
+  const isEdit = !!appointment;
+
+  const [title, setTitle] = useState("");
+  const [description, setDescription] = useState("");
+  const [startAt, setStartAt] = useState("");
+  const [endAt, setEndAt] = useState("");
+  const [location, setLocation] = useState("");
+  const [appointmentType, setAppointmentType] = useState("");
+  const [caseId, setCaseId] = useState("");
+
+  const { data: cases } = useQuery({
+    queryKey: ["cases"],
+    queryFn: () => api.get<{ cases: Case[]; total: number }>("/api/cases"),
+  });
+
+  useEffect(() => {
+    if (appointment) {
+      setTitle(appointment.title);
+      setDescription(appointment.description ?? "");
+      setStartAt(toLocalDatetime(appointment.start_at));
+      setEndAt(appointment.end_at ? toLocalDatetime(appointment.end_at) : "");
+      setLocation(appointment.location ?? "");
+      setAppointmentType(appointment.appointment_type ?? "");
+      setCaseId(appointment.case_id ?? "");
+    } else {
+      setTitle("");
+      setDescription("");
+      setStartAt("");
+      setEndAt("");
+      setLocation("");
+      setAppointmentType("");
+      setCaseId("");
+    }
+  }, [appointment]);
+
+  const createMutation = useMutation({
+    mutationFn: (body: Record<string, unknown>) =>
+      api.post<Appointment>("/api/appointments", body),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["appointments"] });
+      queryClient.invalidateQueries({ queryKey: ["dashboard"] });
+      toast.success("Termin erstellt");
+      onClose();
+    },
+    onError: () => toast.error("Fehler beim Erstellen des Termins"),
+  });
+
+  const updateMutation = useMutation({
+    mutationFn: (body: Record<string, unknown>) =>
+      api.put<Appointment>(`/api/appointments/${appointment!.id}`, body),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["appointments"] });
+      queryClient.invalidateQueries({ queryKey: ["dashboard"] });
+      toast.success("Termin aktualisiert");
+      onClose();
+    },
+    onError: () => toast.error("Fehler beim Aktualisieren des Termins"),
+  });
+
+  const deleteMutation = useMutation({
+    mutationFn: () => api.delete(`/api/appointments/${appointment!.id}`),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["appointments"] });
+      queryClient.invalidateQueries({ queryKey: ["dashboard"] });
+      toast.success("Termin geloscht");
+      onClose();
+    },
+    onError: () => toast.error("Fehler beim Loschen des Termins"),
+  });
+
+  function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!title.trim() || !startAt) return;
+
+    const body: Record<string, unknown> = {
+      title: title.trim(),
+      start_at: new Date(startAt).toISOString(),
+    };
+    if (description.trim()) body.description = description.trim();
+    if (endAt) body.end_at = new Date(endAt).toISOString();
+    if (location.trim()) body.location = location.trim();
+    if (appointmentType) body.appointment_type = appointmentType;
+    if (caseId) body.case_id = caseId;
+
+    if (isEdit) {
+      updateMutation.mutate(body);
+    } else {
+      createMutation.mutate(body);
+    }
+  }
+
+  const isPending = createMutation.isPending || updateMutation.isPending;
+
+  if (!open) return null;
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/30">
+      <div className="w-full max-w-lg rounded-lg border border-neutral-200 bg-white shadow-lg">
+        <div className="flex items-center justify-between border-b border-neutral-200 px-5 py-3">
+          <h2 className="text-sm font-semibold text-neutral-900">
+            {isEdit ? "Termin bearbeiten" : "Neuer Termin"}
+          </h2>
+          <button
+            onClick={onClose}
+            className="rounded-md p-1 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+          >
+            <X className="h-4 w-4" />
+          </button>
+        </div>
+
+        <form onSubmit={handleSubmit} className="space-y-4 p-5">
+          <div>
+            <label className="mb-1 block text-xs font-medium text-neutral-600">
+              Titel *
+            </label>
+            <input
+              type="text"
+              value={title}
+              onChange={(e) => setTitle(e.target.value)}
+              required
+              className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+              placeholder="z.B. Mundliche Verhandlung"
+            />
+          </div>
+
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="mb-1 block text-xs font-medium text-neutral-600">
+                Beginn *
+              </label>
+              <input
+                type="datetime-local"
+                value={startAt}
+                onChange={(e) => setStartAt(e.target.value)}
+                required
+                className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+              />
+            </div>
+            <div>
+              <label className="mb-1 block text-xs font-medium text-neutral-600">
+                Ende
+              </label>
+              <input
+                type="datetime-local"
+                value={endAt}
+                onChange={(e) => setEndAt(e.target.value)}
+                className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+              />
+            </div>
+          </div>
+
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="mb-1 block text-xs font-medium text-neutral-600">
+                Typ
+              </label>
+              <select
+                value={appointmentType}
+                onChange={(e) => setAppointmentType(e.target.value)}
+                className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400"
+              >
+                <option value="">Kein Typ</option>
+                {APPOINTMENT_TYPES.map((t) => (
+                  <option key={t.value} value={t.value}>
+                    {t.label}
+                  </option>
+                ))}
+              </select>
+            </div>
+            <div>
+              <label className="mb-1 block text-xs font-medium text-neutral-600">
+                Akte
+              </label>
+              <select
+                value={caseId}
+                onChange={(e) => setCaseId(e.target.value)}
+                className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400"
+              >
+                <option value="">Keine Akte</option>
+                {cases?.cases?.map((c) => (
+                  <option key={c.id} value={c.id}>
+                    {c.case_number} — {c.title}
+                  </option>
+                ))}
+              </select>
+            </div>
+          </div>
+
+          <div>
+            <label className="mb-1 block text-xs font-medium text-neutral-600">
+              Ort
+            </label>
+            <input
+              type="text"
+              value={location}
+              onChange={(e) => setLocation(e.target.value)}
+              className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+              placeholder="z.B. UPC Munchen, Saal 3"
+            />
+          </div>
+
+          <div>
+            <label className="mb-1 block text-xs font-medium text-neutral-600">
+              Beschreibung
+            </label>
+            <textarea
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              rows={3}
+              className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+              placeholder="Optionale Notizen zum Termin"
+            />
+          </div>
+
+          <div className="flex items-center justify-between pt-2">
+            <div>
+              {isEdit && (
+                <button
+                  type="button"
+                  onClick={() => deleteMutation.mutate()}
+                  disabled={deleteMutation.isPending}
+                  className="rounded-md px-3 py-1.5 text-sm text-red-600 hover:bg-red-50"
+                >
+                  Loschen
+                </button>
+              )}
+            </div>
+            <div className="flex items-center gap-2">
+              <button
+                type="button"
+                onClick={onClose}
+                className="rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm text-neutral-700 hover:bg-neutral-50"
+              >
+                Abbrechen
+              </button>
+              <button
+                type="submit"
+                disabled={isPending || !title.trim() || !startAt}
+                className="rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white hover:bg-neutral-800 disabled:opacity-50"
+              >
+                {isPending ? "Speichern..." : isEdit ? "Aktualisieren" : "Erstellen"}
+              </button>
+            </div>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}

frontend/src/components/cases/CaseForm.tsx

@@ -3,12 +3,12 @@
 import { useState } from "react";
 
 const TYPE_OPTIONS = [
-  { value: "", label: "-- Typ wahlen --" },
+  { value: "", label: "-- Typ wählen --" },
   { value: "INF", label: "Verletzungsklage (INF)" },
   { value: "REV", label: "Widerruf (REV)" },
-  { value: "CCR", label: "Einstweilige Verfugung (CCR)" },
+  { value: "CCR", label: "Einstweilige Verfügung (CCR)" },
   { value: "APP", label: "Berufung (APP)" },
-  { value: "PI", label: "Vorlaufiger Rechtsschutz (PI)" },
+  { value: "PI", label: "Vorläufiger Rechtsschutz (PI)" },
   { value: "ZPO_CIVIL", label: "ZPO Zivilverfahren" },
 ];
 
@@ -43,8 +43,23 @@ export function CaseForm({
     status: initialData?.status ?? "active",
   });
 
+  const [errors, setErrors] = useState<Partial<Record<keyof CaseFormData, string>>>({});
+
+  function validate(): boolean {
+    const newErrors: Partial<Record<keyof CaseFormData, string>> = {};
+    if (!form.case_number.trim()) {
+      newErrors.case_number = "Aktenzeichen ist erforderlich";
+    }
+    if (!form.title.trim()) {
+      newErrors.title = "Titel ist erforderlich";
+    }
+    setErrors(newErrors);
+    return Object.keys(newErrors).length === 0;
+  }
+
   function handleSubmit(e: React.FormEvent) {
     e.preventDefault();
+    if (!validate()) return;
     const data: CaseFormData = {
       ...form,
       case_type: form.case_type || undefined,
@@ -56,26 +71,31 @@ export function CaseForm({
 
   function update(field: keyof CaseFormData, value: string) {
     setForm((prev) => ({ ...prev, [field]: value }));
+    if (errors[field]) {
+      setErrors((prev) => ({ ...prev, [field]: undefined }));
+    }
   }
 
   const inputClass =
-    "w-full rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
+    "w-full rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm outline-none transition-colors focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
 
   return (
     <form onSubmit={handleSubmit} className="space-y-4">
-      <div className="grid grid-cols-2 gap-4">
+      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
         <div>
           <label className="mb-1 block text-sm font-medium text-neutral-700">
             Aktenzeichen *
           </label>
           <input
             type="text"
-            required
             value={form.case_number}
             onChange={(e) => update("case_number", e.target.value)}
             placeholder="z.B. 2026/001"
-            className={inputClass}
+            className={`${inputClass} ${errors.case_number ? "border-red-300 focus:border-red-400 focus:ring-red-400" : ""}`}
           />
+          {errors.case_number && (
+            <p className="mt-1 text-xs text-red-600">{errors.case_number}</p>
+          )}
         </div>
         <div>
           <label className="mb-1 block text-sm font-medium text-neutral-700">
@@ -87,7 +107,7 @@ export function CaseForm({
             className={inputClass}
           >
             <option value="active">Aktiv</option>
-            <option value="pending">Anhangig</option>
+            <option value="pending">Anhängig</option>
             <option value="closed">Geschlossen</option>
           </select>
         </div>
@@ -99,15 +119,17 @@ export function CaseForm({
         </label>
         <input
           type="text"
-          required
           value={form.title}
           onChange={(e) => update("title", e.target.value)}
           placeholder="Bezeichnung der Akte"
-          className={inputClass}
+          className={`${inputClass} ${errors.title ? "border-red-300 focus:border-red-400 focus:ring-red-400" : ""}`}
         />
+        {errors.title && (
+          <p className="mt-1 text-xs text-red-600">{errors.title}</p>
+        )}
       </div>
 
-      <div className="grid grid-cols-2 gap-4">
+      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
         <div>
           <label className="mb-1 block text-sm font-medium text-neutral-700">
             Verfahrensart
@@ -132,7 +154,7 @@ export function CaseForm({
             type="text"
             value={form.court}
             onChange={(e) => update("court", e.target.value)}
-            placeholder="z.B. UPC Munich Central Division"
+            placeholder="z.B. UPC München Zentralkammer"
             className={inputClass}
           />
         </div>
@@ -155,7 +177,7 @@ export function CaseForm({
         <button
           type="submit"
           disabled={isSubmitting}
-          className="rounded-md bg-neutral-900 px-4 py-1.5 text-sm font-medium text-white hover:bg-neutral-800 disabled:opacity-50"
+          className="rounded-md bg-neutral-900 px-4 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:opacity-50"
         >
           {isSubmitting ? "Speichern..." : submitLabel}
         </button>

frontend/src/components/cases/CaseTimeline.tsx

@@ -3,6 +3,7 @@
 import type { CaseEvent } from "@/lib/types";
 import { format } from "date-fns";
 import { de } from "date-fns/locale";
+import { Activity } from "lucide-react";
 
 const EVENT_ICONS: Record<string, string> = {
   case_created: "bg-emerald-500",
@@ -20,9 +21,14 @@ interface CaseTimelineProps {
 export function CaseTimeline({ events }: CaseTimelineProps) {
   if (events.length === 0) {
     return (
-      <p className="py-8 text-center text-sm text-neutral-400">
-        Keine Ereignisse vorhanden.
-      </p>
+      <div className="flex flex-col items-center py-8 text-center">
+        <div className="rounded-xl bg-neutral-100 p-3">
+          <Activity className="h-5 w-5 text-neutral-400" />
+        </div>
+        <p className="mt-2 text-sm text-neutral-500">
+          Keine Ereignisse vorhanden.
+        </p>
+      </div>
     );
   }
 

frontend/src/components/cases/PartyList.tsx

@@ -5,7 +5,7 @@ import { useState } from "react";
 import { toast } from "sonner";
 import { api } from "@/lib/api";
 import type { Party } from "@/lib/types";
-import { Plus, Trash2, X } from "lucide-react";
+import { Plus, Trash2, X, Users } from "lucide-react";
 
 interface PartyListProps {
   caseId: string;
@@ -19,13 +19,16 @@ interface PartyFormData {
 }
 
 const ROLE_OPTIONS = [
-  "Klager",
+  "Kläger",
   "Beklagter",
   "Nebenintervenient",
   "Patentinhaber",
   "Streithelfer",
 ];
 
+const inputClass =
+  "w-full rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm outline-none transition-colors focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
+
 export function PartyList({ caseId, parties }: PartyListProps) {
   const queryClient = useQueryClient();
   const [showForm, setShowForm] = useState(false);
@@ -44,11 +47,11 @@ export function PartyList({ caseId, parties }: PartyListProps) {
       }),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ["case", caseId] });
-      toast.success("Partei hinzugefugt");
+      toast.success("Partei hinzugefügt");
       setShowForm(false);
       setForm({ name: "", role: "", representative: "" });
     },
-    onError: () => toast.error("Fehler beim Hinzufugen"),
+    onError: () => toast.error("Fehler beim Hinzufügen"),
   });
 
   const deleteMutation = useMutation({
@@ -60,9 +63,6 @@ export function PartyList({ caseId, parties }: PartyListProps) {
     onError: () => toast.error("Fehler beim Entfernen"),
   });
 
-  const inputClass =
-    "w-full rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
-
   return (
     <div>
       <div className="flex items-center justify-between">
@@ -72,25 +72,37 @@ export function PartyList({ caseId, parties }: PartyListProps) {
         {!showForm && (
           <button
             onClick={() => setShowForm(true)}
-            className="inline-flex items-center gap-1 text-sm text-neutral-500 hover:text-neutral-700"
+            className="inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
           >
             <Plus className="h-3.5 w-3.5" />
-            Hinzufugen
+            Hinzufügen
           </button>
         )}
       </div>
 
       {parties.length === 0 && !showForm && (
-        <p className="mt-4 py-4 text-center text-sm text-neutral-400">
-          Keine Parteien vorhanden.
-        </p>
+        <div className="mt-4 flex flex-col items-center py-6 text-center">
+          <div className="rounded-xl bg-neutral-100 p-3">
+            <Users className="h-5 w-5 text-neutral-400" />
+          </div>
+          <p className="mt-2 text-sm text-neutral-500">
+            Keine Parteien vorhanden.
+          </p>
+          <button
+            onClick={() => setShowForm(true)}
+            className="mt-3 inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
+          >
+            <Plus className="h-3.5 w-3.5" />
+            Erste Partei hinzufügen
+          </button>
+        </div>
       )}
 
       <div className="mt-3 space-y-2">
         {parties.map((party) => (
           <div
             key={party.id}
-            className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-2.5"
+            className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-2.5 transition-colors hover:bg-neutral-50"
           >
             <div>
               <p className="text-sm font-medium text-neutral-900">
@@ -105,7 +117,7 @@ export function PartyList({ caseId, parties }: PartyListProps) {
             </div>
             <button
               onClick={() => deleteMutation.mutate(party.id)}
-              className="rounded p-1 text-neutral-300 hover:bg-neutral-100 hover:text-red-500"
+              className="rounded p-1 text-neutral-300 transition-colors hover:bg-neutral-100 hover:text-red-500"
               title="Partei entfernen"
             >
               <Trash2 className="h-3.5 w-3.5" />
@@ -122,7 +134,7 @@ export function PartyList({ caseId, parties }: PartyListProps) {
             </span>
             <button
               onClick={() => setShowForm(false)}
-              className="text-neutral-400 hover:text-neutral-600"
+              className="text-neutral-400 transition-colors hover:text-neutral-600"
             >
               <X className="h-4 w-4" />
             </button>
@@ -130,19 +142,22 @@ export function PartyList({ caseId, parties }: PartyListProps) {
           <form
             onSubmit={(e) => {
               e.preventDefault();
+              if (!form.name.trim()) {
+                toast.error("Bitte Namen eingeben");
+                return;
+              }
               addMutation.mutate(form);
             }}
             className="mt-3 space-y-3"
           >
             <input
               type="text"
-              required
               placeholder="Name der Partei"
               value={form.name}
               onChange={(e) => setForm({ ...form, name: e.target.value })}
               className={inputClass}
             />
-            <div className="grid grid-cols-2 gap-3">
+            <div className="grid grid-cols-1 gap-3 sm:grid-cols-2">
               <select
                 value={form.role}
                 onChange={(e) => setForm({ ...form, role: e.target.value })}
@@ -169,9 +184,9 @@ export function PartyList({ caseId, parties }: PartyListProps) {
               <button
                 type="submit"
                 disabled={addMutation.isPending}
-                className="rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white hover:bg-neutral-800 disabled:opacity-50"
+                className="rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:opacity-50"
               >
-                {addMutation.isPending ? "..." : "Hinzufugen"}
+                {addMutation.isPending ? "Speichern..." : "Hinzufügen"}
               </button>
             </div>
           </form>

frontend/src/components/dashboard/AISummaryCard.tsx

@@ -0,0 +1,70 @@
+"use client";
+
+import { Sparkles } from "lucide-react";
+import type { DashboardData } from "@/lib/types";
+
+interface Props {
+  data: DashboardData;
+}
+
+function generateSummary(data: DashboardData): string {
+  const parts: string[] = [];
+  const { deadline_summary: ds, case_summary: cs, upcoming_deadlines: ud } = data;
+
+  // Deadline urgency
+  if (ds.overdue_count > 0) {
+    parts.push(
+      `${ds.overdue_count} Frist${ds.overdue_count > 1 ? "en" : ""} ${ds.overdue_count > 1 ? "sind" : "ist"} überfällig und ${ds.overdue_count > 1 ? "erfordern" : "erfordert"} sofortige Aufmerksamkeit.`,
+    );
+  }
+
+  if (ds.due_this_week > 0) {
+    parts.push(
+      `${ds.due_this_week} Frist${ds.due_this_week > 1 ? "en laufen" : " läuft"} diese Woche ab.`,
+    );
+  }
+
+  // Highlight most critical upcoming deadline
+  if (ud.length > 0) {
+    const next = ud[0];
+    parts.push(
+      `Die nächste Frist ist "${next.title}" in Akte ${next.case_number}.`,
+    );
+  }
+
+  // Case activity
+  if (cs.new_this_month > 0) {
+    parts.push(
+      `${cs.new_this_month} neue Akte${cs.new_this_month > 1 ? "n" : ""} diesen Monat bei ${cs.active_count} aktiven Verfahren.`,
+    );
+  } else {
+    parts.push(`${cs.active_count} aktive Verfahren.`);
+  }
+
+  // All good
+  if (ds.overdue_count === 0 && ds.due_this_week === 0) {
+    parts.unshift("Alle Fristen sind im Zeitplan.");
+  }
+
+  return parts.join(" ");
+}
+
+export function AISummaryCard({ data }: Props) {
+  const summary = generateSummary(data);
+
+  return (
+    <div className="rounded-xl border border-neutral-200 bg-white p-5">
+      <div className="flex items-center gap-2">
+        <div className="rounded-md bg-violet-50 p-1.5">
+          <Sparkles className="h-4 w-4 text-violet-500" />
+        </div>
+        <h2 className="text-sm font-semibold text-neutral-900">
+          KI-Zusammenfassung
+        </h2>
+      </div>
+      <p className="mt-3 text-sm leading-relaxed text-neutral-700">
+        {summary}
+      </p>
+    </div>
+  );
+}

frontend/src/components/dashboard/CaseOverviewGrid.tsx

@@ -0,0 +1,55 @@
+"use client";
+
+import { FolderOpen, FolderPlus, Archive } from "lucide-react";
+import type { CaseSummary } from "@/lib/types";
+
+interface Props {
+  data: CaseSummary;
+}
+
+export function CaseOverviewGrid({ data }: Props) {
+  const items = [
+    {
+      label: "Aktive Akten",
+      value: data.active_count,
+      icon: FolderOpen,
+      color: "text-blue-600",
+      bg: "bg-blue-50",
+    },
+    {
+      label: "Neu (Monat)",
+      value: data.new_this_month,
+      icon: FolderPlus,
+      color: "text-violet-600",
+      bg: "bg-violet-50",
+    },
+    {
+      label: "Abgeschlossen",
+      value: data.closed_count,
+      icon: Archive,
+      color: "text-neutral-500",
+      bg: "bg-neutral-50",
+    },
+  ];
+
+  return (
+    <div className="rounded-xl border border-neutral-200 bg-white p-5">
+      <h2 className="text-sm font-semibold text-neutral-900">Aktenübersicht</h2>
+      <div className="mt-4 space-y-3">
+        {items.map((item) => (
+          <div key={item.label} className="flex items-center justify-between">
+            <div className="flex items-center gap-2.5">
+              <div className={`rounded-md p-1.5 ${item.bg}`}>
+                <item.icon className={`h-4 w-4 ${item.color}`} />
+              </div>
+              <span className="text-sm text-neutral-600">{item.label}</span>
+            </div>
+            <span className="text-lg font-semibold tabular-nums text-neutral-900">
+              {item.value}
+            </span>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

frontend/src/components/dashboard/DeadlineTrafficLights.tsx

@@ -0,0 +1,105 @@
+"use client";
+
+import { useEffect, useRef } from "react";
+import { AlertTriangle, Clock, CheckCircle } from "lucide-react";
+import type { DeadlineSummary } from "@/lib/types";
+
+function AnimatedCount({ value }: { value: number }) {
+  const ref = useRef<HTMLSpanElement>(null);
+  const prevValue = useRef(value);
+
+  useEffect(() => {
+    const el = ref.current;
+    if (!el || prevValue.current === value) return;
+
+    el.classList.remove("animate-count-up");
+    void el.offsetWidth;
+    el.classList.add("animate-count-up");
+    prevValue.current = value;
+  }, [value]);
+
+  return (
+    <span ref={ref} className="inline-block tabular-nums">
+      {value}
+    </span>
+  );
+}
+
+interface Props {
+  data: DeadlineSummary;
+  onFilter?: (filter: "overdue" | "this_week" | "ok") => void;
+}
+
+export function DeadlineTrafficLights({ data, onFilter }: Props) {
+  const cards = [
+    {
+      key: "overdue" as const,
+      label: "Überfällig",
+      count: data.overdue_count,
+      icon: AlertTriangle,
+      bg: "bg-red-50",
+      border: "border-red-200",
+      iconColor: "text-red-500",
+      countColor: "text-red-700",
+      labelColor: "text-red-600",
+      ring: data.overdue_count > 0 ? "ring-2 ring-red-300 ring-offset-1" : "",
+      pulse: data.overdue_count > 0,
+    },
+    {
+      key: "this_week" as const,
+      label: "Diese Woche",
+      count: data.due_this_week,
+      icon: Clock,
+      bg: "bg-amber-50",
+      border: "border-amber-200",
+      iconColor: "text-amber-500",
+      countColor: "text-amber-700",
+      labelColor: "text-amber-600",
+      ring: "",
+      pulse: false,
+    },
+    {
+      key: "ok" as const,
+      label: "Im Zeitplan",
+      count: data.ok_count + data.due_next_week,
+      icon: CheckCircle,
+      bg: "bg-emerald-50",
+      border: "border-emerald-200",
+      iconColor: "text-emerald-500",
+      countColor: "text-emerald-700",
+      labelColor: "text-emerald-600",
+      ring: "",
+      pulse: false,
+    },
+  ];
+
+  return (
+    <div className="grid grid-cols-1 gap-4 sm:grid-cols-3">
+      {cards.map((card) => (
+        <button
+          key={card.key}
+          onClick={() => onFilter?.(card.key)}
+          className={`group relative overflow-hidden rounded-xl border ${card.border} ${card.bg} ${card.ring} p-6 text-left transition-all hover:shadow-md active:scale-[0.98]`}
+        >
+          {card.pulse && (
+            <span className="absolute right-4 top-4 flex h-3 w-3">
+              <span className="absolute inline-flex h-full w-full animate-ping rounded-full bg-red-400 opacity-75" />
+              <span className="relative inline-flex h-3 w-3 rounded-full bg-red-500" />
+            </span>
+          )}
+          <div className="flex items-center gap-3">
+            <div className={`rounded-lg p-2 ${card.bg}`}>
+              <card.icon className={`h-5 w-5 ${card.iconColor}`} />
+            </div>
+            <span className={`text-sm font-medium ${card.labelColor}`}>
+              {card.label}
+            </span>
+          </div>
+          <div className={`mt-4 text-4xl font-bold tracking-tight ${card.countColor}`}>
+            <AnimatedCount value={card.count} />
+          </div>
+        </button>
+      ))}
+    </div>
+  );
+}

frontend/src/components/dashboard/QuickActions.tsx

@@ -0,0 +1,53 @@
+"use client";
+
+import Link from "next/link";
+import { FolderPlus, Clock, Sparkles, CalendarSync } from "lucide-react";
+
+const actions = [
+  {
+    label: "Neue Akte",
+    href: "/cases/new",
+    icon: FolderPlus,
+    color: "text-blue-600 bg-blue-50 hover:bg-blue-100",
+  },
+  {
+    label: "Frist eintragen",
+    href: "/fristen",
+    icon: Clock,
+    color: "text-amber-600 bg-amber-50 hover:bg-amber-100",
+  },
+  {
+    label: "AI Analyse",
+    href: "/ai/extract",
+    icon: Sparkles,
+    color: "text-violet-600 bg-violet-50 hover:bg-violet-100",
+  },
+  {
+    label: "CalDAV Sync",
+    href: "/einstellungen",
+    icon: CalendarSync,
+    color: "text-emerald-600 bg-emerald-50 hover:bg-emerald-100",
+  },
+];
+
+export function QuickActions() {
+  return (
+    <div className="rounded-xl border border-neutral-200 bg-white p-5">
+      <h2 className="text-sm font-semibold text-neutral-900">
+        Schnellzugriff
+      </h2>
+      <div className="mt-3 grid grid-cols-2 gap-2">
+        {actions.map((action) => (
+          <Link
+            key={action.label}
+            href={action.href}
+            className={`flex items-center gap-2 rounded-lg px-3 py-2.5 text-sm font-medium transition-colors ${action.color}`}
+          >
+            <action.icon className="h-4 w-4" />
+            {action.label}
+          </Link>
+        ))}
+      </div>
+    </div>
+  );
+}

frontend/src/components/dashboard/UpcomingTimeline.tsx

@@ -0,0 +1,134 @@
+"use client";
+
+import { format, parseISO, isToday, isTomorrow } from "date-fns";
+import { de } from "date-fns/locale";
+import { Clock, Calendar, MapPin } from "lucide-react";
+import type { UpcomingDeadline, UpcomingAppointment } from "@/lib/types";
+
+interface Props {
+  deadlines: UpcomingDeadline[];
+  appointments: UpcomingAppointment[];
+}
+
+type TimelineItem =
+  | { type: "deadline"; date: Date; data: UpcomingDeadline }
+  | { type: "appointment"; date: Date; data: UpcomingAppointment };
+
+function formatDayLabel(date: Date): string {
+  if (isToday(date)) return "Heute";
+  if (isTomorrow(date)) return "Morgen";
+  return format(date, "EEEE, d. MMM", { locale: de });
+}
+
+export function UpcomingTimeline({ deadlines, appointments }: Props) {
+  const items: TimelineItem[] = [
+    ...deadlines.map((d) => ({
+      type: "deadline" as const,
+      date: parseISO(d.due_date),
+      data: d,
+    })),
+    ...appointments.map((a) => ({
+      type: "appointment" as const,
+      date: parseISO(a.start_at),
+      data: a,
+    })),
+  ].sort((a, b) => a.date.getTime() - b.date.getTime());
+
+  // Group by day
+  const grouped = new Map<string, TimelineItem[]>();
+  for (const item of items) {
+    const key = format(item.date, "yyyy-MM-dd");
+    const group = grouped.get(key) ?? [];
+    group.push(item);
+    grouped.set(key, group);
+  }
+
+  const empty = items.length === 0;
+
+  return (
+    <div className="rounded-xl border border-neutral-200 bg-white p-5">
+      <h2 className="text-sm font-semibold text-neutral-900">
+        Nächste 7 Tage
+      </h2>
+      {empty ? (
+        <p className="mt-6 text-center text-sm text-neutral-400">
+          Keine anstehenden Termine oder Fristen
+        </p>
+      ) : (
+        <div className="mt-4 space-y-5">
+          {Array.from(grouped.entries()).map(([dateKey, dayItems]) => (
+            <div key={dateKey}>
+              <p className="text-xs font-medium uppercase tracking-wider text-neutral-400">
+                {formatDayLabel(dayItems[0].date)}
+              </p>
+              <div className="mt-2 space-y-2">
+                {dayItems.map((item, i) => (
+                  <TimelineEntry key={`${item.type}-${i}`} item={item} />
+                ))}
+              </div>
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
+
+function TimelineEntry({ item }: { item: TimelineItem }) {
+  if (item.type === "deadline") {
+    const d = item.data;
+    return (
+      <div className="flex items-start gap-3 rounded-lg border border-neutral-100 bg-neutral-50/50 px-3 py-2.5">
+        <div className="mt-0.5 rounded-md bg-amber-50 p-1">
+          <Clock className="h-3.5 w-3.5 text-amber-500" />
+        </div>
+        <div className="min-w-0 flex-1">
+          <p className="truncate text-sm font-medium text-neutral-900">
+            {d.title}
+          </p>
+          <p className="mt-0.5 truncate text-xs text-neutral-500">
+            {d.case_number} · {d.case_title}
+          </p>
+        </div>
+        <span className="shrink-0 text-xs font-medium text-amber-600">
+          Frist
+        </span>
+      </div>
+    );
+  }
+
+  const a = item.data;
+  return (
+    <div className="flex items-start gap-3 rounded-lg border border-neutral-100 bg-neutral-50/50 px-3 py-2.5">
+      <div className="mt-0.5 rounded-md bg-blue-50 p-1">
+        <Calendar className="h-3.5 w-3.5 text-blue-500" />
+      </div>
+      <div className="min-w-0 flex-1">
+        <p className="truncate text-sm font-medium text-neutral-900">
+          {a.title}
+        </p>
+        <div className="mt-0.5 flex items-center gap-2 text-xs text-neutral-500">
+          <span>{format(item.date, "HH:mm")} Uhr</span>
+          {a.location && (
+            <>
+              <span className="text-neutral-300">·</span>
+              <span className="flex items-center gap-0.5 truncate">
+                <MapPin className="h-3 w-3" />
+                {a.location}
+              </span>
+            </>
+          )}
+          {a.case_number && (
+            <>
+              <span className="text-neutral-300">·</span>
+              <span>{a.case_number}</span>
+            </>
+          )}
+        </div>
+      </div>
+      <span className="shrink-0 text-xs font-medium text-blue-600">
+        Termin
+      </span>
+    </div>
+  );
+}

frontend/src/components/deadlines/DeadlineCalculator.tsx

@@ -0,0 +1,209 @@
+"use client";
+
+import { useQuery, useMutation } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type {
+  ProceedingType,
+  CalculateResponse,
+  CalculatedDeadline,
+} from "@/lib/types";
+import { format, parseISO, isPast, isThisWeek } from "date-fns";
+import { de } from "date-fns/locale";
+import {
+  Calculator,
+  Calendar,
+  ArrowRight,
+  AlertTriangle,
+} from "lucide-react";
+import { useState } from "react";
+
+function getTimelineUrgency(dueDate: string): "red" | "amber" | "green" {
+  const due = parseISO(dueDate);
+  if (isPast(due)) return "red";
+  if (isThisWeek(due, { weekStartsOn: 1 })) return "amber";
+  return "green";
+}
+
+const dotColors = {
+  red: "bg-red-500",
+  amber: "bg-amber-500",
+  green: "bg-green-500",
+};
+
+const inputClass =
+  "w-full rounded-md border border-neutral-200 bg-white px-3 py-2 text-sm text-neutral-900 outline-none transition-colors focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400";
+
+export function DeadlineCalculator() {
+  const [proceedingType, setProceedingType] = useState("");
+  const [triggerDate, setTriggerDate] = useState("");
+
+  const { data: proceedingTypes, isLoading: typesLoading } = useQuery({
+    queryKey: ["proceeding-types"],
+    queryFn: () => api.get<ProceedingType[]>("/api/proceeding-types"),
+  });
+
+  const calculateMutation = useMutation({
+    mutationFn: (params: {
+      proceeding_type: string;
+      trigger_event_date: string;
+    }) => api.post<CalculateResponse>("/api/deadlines/calculate", params),
+  });
+
+  function handleCalculate(e: React.FormEvent) {
+    e.preventDefault();
+    if (!proceedingType || !triggerDate) return;
+    calculateMutation.mutate({
+      proceeding_type: proceedingType,
+      trigger_event_date: triggerDate,
+    });
+  }
+
+  const results = calculateMutation.data;
+
+  return (
+    <div className="space-y-6">
+      {/* Input form */}
+      <form
+        onSubmit={handleCalculate}
+        className="rounded-lg border border-neutral-200 bg-white p-5"
+      >
+        <div className="flex items-center gap-2 text-sm font-medium text-neutral-900">
+          <Calculator className="h-4 w-4" />
+          Fristenberechnung
+        </div>
+        <div className="mt-4 grid gap-4 sm:grid-cols-3">
+          <div>
+            <label className="mb-1 block text-xs font-medium text-neutral-500">
+              Verfahrensart
+            </label>
+            <select
+              value={proceedingType}
+              onChange={(e) => setProceedingType(e.target.value)}
+              disabled={typesLoading}
+              className={inputClass}
+            >
+              <option value="">Bitte wählen...</option>
+              {proceedingTypes?.map((pt) => (
+                <option key={pt.id} value={pt.code}>
+                  {pt.name} ({pt.code})
+                </option>
+              ))}
+            </select>
+          </div>
+          <div>
+            <label className="mb-1 block text-xs font-medium text-neutral-500">
+              Auslösedatum
+            </label>
+            <input
+              type="date"
+              value={triggerDate}
+              onChange={(e) => setTriggerDate(e.target.value)}
+              className={inputClass}
+            />
+          </div>
+          <div className="flex items-end">
+            <button
+              type="submit"
+              disabled={
+                !proceedingType ||
+                !triggerDate ||
+                calculateMutation.isPending
+              }
+              className="flex w-full items-center justify-center gap-2 rounded-md bg-neutral-900 px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:cursor-not-allowed disabled:opacity-50"
+            >
+              {calculateMutation.isPending ? "Berechne..." : "Berechnen"}
+              <ArrowRight className="h-3.5 w-3.5" />
+            </button>
+          </div>
+        </div>
+      </form>
+
+      {/* Error */}
+      {calculateMutation.isError && (
+        <div className="flex items-center gap-2 rounded-lg border border-red-200 bg-red-50 px-4 py-3 text-sm text-red-700">
+          <AlertTriangle className="h-4 w-4 shrink-0" />
+          Fehler bei der Berechnung. Bitte Eingaben prüfen.
+        </div>
+      )}
+
+      {/* Results */}
+      {results && results.deadlines && (
+        <div className="animate-fade-in space-y-3">
+          <div className="flex items-center justify-between">
+            <h3 className="text-sm font-medium text-neutral-900">
+              Berechnete Fristen
+            </h3>
+            <span className="text-xs text-neutral-500">
+              {results.deadlines.length} Fristen ab{" "}
+              {format(parseISO(results.trigger_event_date), "dd. MMM yyyy", {
+                locale: de,
+              })}
+            </span>
+          </div>
+
+          {/* Timeline */}
+          <div className="relative rounded-lg border border-neutral-200 bg-white">
+            {results.deadlines.map((d: CalculatedDeadline, i: number) => {
+              const urgency = getTimelineUrgency(d.due_date);
+              const isLast = i === results.deadlines.length - 1;
+
+              return (
+                <div
+                  key={d.rule_id}
+                  className={`flex gap-3 px-4 py-3 ${!isLast ? "border-b border-neutral-100" : ""}`}
+                >
+                  <div className="flex flex-col items-center pt-1">
+                    <div
+                      className={`h-2.5 w-2.5 shrink-0 rounded-full ${dotColors[urgency]}`}
+                    />
+                    {!isLast && (
+                      <div className="mt-1 w-px flex-1 bg-neutral-200" />
+                    )}
+                  </div>
+                  <div className="min-w-0 flex-1">
+                    <div className="flex flex-col gap-1 sm:flex-row sm:items-start sm:justify-between sm:gap-2">
+                      <span className="text-sm font-medium text-neutral-900">
+                        {d.title}
+                      </span>
+                      <span className="shrink-0 text-sm font-medium tabular-nums text-neutral-700">
+                        {format(parseISO(d.due_date), "dd.MM.yyyy")}
+                      </span>
+                    </div>
+                    <div className="mt-0.5 flex flex-wrap items-center gap-2 text-xs text-neutral-500">
+                      {d.rule_code && <span>{d.rule_code}</span>}
+                      {d.was_adjusted && (
+                        <>
+                          {d.rule_code && <span>·</span>}
+                          <span className="text-amber-600">
+                            Angepasst (Original:{" "}
+                            {format(
+                              parseISO(d.original_due_date),
+                              "dd.MM.yyyy",
+                            )}
+                            )
+                          </span>
+                        </>
+                      )}
+                    </div>
+                  </div>
+                </div>
+              );
+            })}
+          </div>
+        </div>
+      )}
+
+      {/* Empty state */}
+      {!results && !calculateMutation.isPending && (
+        <div className="flex flex-col items-center rounded-lg border border-dashed border-neutral-300 bg-white px-6 py-12 text-center">
+          <div className="rounded-xl bg-neutral-100 p-3">
+            <Calendar className="h-6 w-6 text-neutral-400" />
+          </div>
+          <p className="mt-3 text-sm text-neutral-500">
+            Verfahrensart und Auslösedatum wählen, um Fristen zu berechnen
+          </p>
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/deadlines/DeadlineCalendarView.tsx

@@ -0,0 +1,154 @@
+"use client";
+
+import type { Deadline } from "@/lib/types";
+import {
+  format,
+  startOfMonth,
+  endOfMonth,
+  startOfWeek,
+  endOfWeek,
+  eachDayOfInterval,
+  isSameMonth,
+  isToday,
+  parseISO,
+  isPast,
+  isThisWeek,
+  addMonths,
+  subMonths,
+} from "date-fns";
+import { de } from "date-fns/locale";
+import { ChevronLeft, ChevronRight } from "lucide-react";
+import { useState, useMemo } from "react";
+
+interface DeadlineCalendarViewProps {
+  deadlines: Deadline[];
+}
+
+function getUrgency(deadline: Deadline): "red" | "amber" | "green" {
+  if (deadline.status === "completed") return "green";
+  const due = parseISO(deadline.due_date);
+  if (isPast(due)) return "red";
+  if (isThisWeek(due, { weekStartsOn: 1 })) return "amber";
+  return "green";
+}
+
+const dotColors = {
+  red: "bg-red-500",
+  amber: "bg-amber-500",
+  green: "bg-green-500",
+};
+
+export function DeadlineCalendarView({ deadlines }: DeadlineCalendarViewProps) {
+  const [currentMonth, setCurrentMonth] = useState(new Date());
+
+  const monthStart = startOfMonth(currentMonth);
+  const monthEnd = endOfMonth(currentMonth);
+  const calStart = startOfWeek(monthStart, { weekStartsOn: 1 });
+  const calEnd = endOfWeek(monthEnd, { weekStartsOn: 1 });
+  const days = eachDayOfInterval({ start: calStart, end: calEnd });
+
+  const deadlinesByDay = useMemo(() => {
+    const map = new Map<string, Deadline[]>();
+    for (const d of deadlines) {
+      if (d.status === "completed") continue;
+      const key = d.due_date.slice(0, 10);
+      const existing = map.get(key) || [];
+      existing.push(d);
+      map.set(key, existing);
+    }
+    return map;
+  }, [deadlines]);
+
+  const weekDays = ["Mo", "Di", "Mi", "Do", "Fr", "Sa", "So"];
+
+  return (
+    <div className="rounded-lg border border-neutral-200 bg-white">
+      {/* Header */}
+      <div className="flex items-center justify-between border-b border-neutral-200 px-4 py-3">
+        <button
+          onClick={() => setCurrentMonth(subMonths(currentMonth, 1))}
+          className="rounded-md p-1 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+        >
+          <ChevronLeft className="h-4 w-4" />
+        </button>
+        <span className="text-sm font-medium text-neutral-900">
+          {format(currentMonth, "MMMM yyyy", { locale: de })}
+        </span>
+        <button
+          onClick={() => setCurrentMonth(addMonths(currentMonth, 1))}
+          className="rounded-md p-1 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+        >
+          <ChevronRight className="h-4 w-4" />
+        </button>
+      </div>
+
+      {/* Weekday labels */}
+      <div className="grid grid-cols-7 border-b border-neutral-100">
+        {weekDays.map((d) => (
+          <div key={d} className="px-2 py-2 text-center text-xs font-medium text-neutral-400">
+            {d}
+          </div>
+        ))}
+      </div>
+
+      {/* Days grid */}
+      <div className="grid grid-cols-7">
+        {days.map((day, i) => {
+          const key = format(day, "yyyy-MM-dd");
+          const dayDeadlines = deadlinesByDay.get(key) || [];
+          const inMonth = isSameMonth(day, currentMonth);
+          const today = isToday(day);
+
+          return (
+            <div
+              key={i}
+              className={`min-h-[4.5rem] border-b border-r border-neutral-100 p-1.5 ${
+                !inMonth ? "bg-neutral-50" : ""
+              }`}
+            >
+              <div
+                className={`mb-1 text-right text-xs ${
+                  today
+                    ? "font-bold text-neutral-900"
+                    : inMonth
+                      ? "text-neutral-600"
+                      : "text-neutral-300"
+                }`}
+              >
+                {today ? (
+                  <span className="inline-flex h-5 w-5 items-center justify-center rounded-full bg-neutral-900 text-white">
+                    {format(day, "d")}
+                  </span>
+                ) : (
+                  format(day, "d")
+                )}
+              </div>
+              <div className="space-y-0.5">
+                {dayDeadlines.slice(0, 3).map((dl) => {
+                  const urgency = getUrgency(dl);
+                  return (
+                    <div
+                      key={dl.id}
+                      className="flex items-center gap-1 truncate"
+                      title={dl.title}
+                    >
+                      <div className={`h-1.5 w-1.5 shrink-0 rounded-full ${dotColors[urgency]}`} />
+                      <span className="truncate text-[10px] text-neutral-700">
+                        {dl.title}
+                      </span>
+                    </div>
+                  );
+                })}
+                {dayDeadlines.length > 3 && (
+                  <div className="text-[10px] text-neutral-400">
+                    +{dayDeadlines.length - 3} mehr
+                  </div>
+                )}
+              </div>
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}

frontend/src/components/deadlines/DeadlineList.tsx

@@ -0,0 +1,288 @@
+"use client";
+
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { Deadline, Case } from "@/lib/types";
+import { format, isPast, isThisWeek, parseISO } from "date-fns";
+import { de } from "date-fns/locale";
+import { Check, Clock, Filter } from "lucide-react";
+import { toast } from "sonner";
+import { useState, useMemo } from "react";
+import { EmptyState } from "@/components/ui/EmptyState";
+
+type StatusFilter = "all" | "pending" | "completed" | "overdue";
+
+function getUrgency(deadline: Deadline): "red" | "amber" | "green" {
+  if (deadline.status === "completed") return "green";
+  const due = parseISO(deadline.due_date);
+  if (isPast(due)) return "red";
+  if (isThisWeek(due, { weekStartsOn: 1 })) return "amber";
+  return "green";
+}
+
+const urgencyConfig = {
+  red: {
+    bg: "bg-red-50",
+    border: "border-red-200",
+    badge: "bg-red-100 text-red-700",
+    dot: "bg-red-500",
+    label: "Überfällig",
+  },
+  amber: {
+    bg: "bg-amber-50",
+    border: "border-amber-200",
+    badge: "bg-amber-100 text-amber-700",
+    dot: "bg-amber-500",
+    label: "Diese Woche",
+  },
+  green: {
+    bg: "bg-white",
+    border: "border-neutral-200",
+    badge: "bg-green-100 text-green-700",
+    dot: "bg-green-500",
+    label: "OK",
+  },
+};
+
+const selectClass =
+  "rounded-md border border-neutral-200 bg-white px-2.5 py-1 text-sm text-neutral-700 transition-colors focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400 outline-none";
+
+export function DeadlineList() {
+  const queryClient = useQueryClient();
+  const [statusFilter, setStatusFilter] = useState<StatusFilter>("all");
+  const [caseFilter, setCaseFilter] = useState<string>("all");
+
+  const { data: deadlines, isLoading } = useQuery({
+    queryKey: ["deadlines"],
+    queryFn: () => api.get<Deadline[]>("/api/deadlines"),
+  });
+
+  const { data: cases } = useQuery({
+    queryKey: ["cases"],
+    queryFn: () => api.get<Case[]>("/api/cases"),
+  });
+
+  const completeMutation = useMutation({
+    mutationFn: (id: string) =>
+      api.patch<Deadline>(`/api/deadlines/${id}/complete`),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["deadlines"] });
+      toast.success("Frist als erledigt markiert");
+    },
+    onError: () => {
+      toast.error("Fehler beim Abschließen der Frist");
+    },
+  });
+
+  const caseMap = useMemo(() => {
+    const map = new Map<string, Case>();
+    cases?.forEach((c) => map.set(c.id, c));
+    return map;
+  }, [cases]);
+
+  const filtered = useMemo(() => {
+    if (!deadlines) return [];
+    return deadlines.filter((d) => {
+      if (statusFilter === "pending" && d.status !== "pending") return false;
+      if (statusFilter === "completed" && d.status !== "completed")
+        return false;
+      if (statusFilter === "overdue") {
+        if (d.status === "completed") return false;
+        if (!isPast(parseISO(d.due_date))) return false;
+      }
+      if (caseFilter !== "all" && d.case_id !== caseFilter) return false;
+      return true;
+    });
+  }, [deadlines, statusFilter, caseFilter]);
+
+  const counts = useMemo(() => {
+    if (!deadlines) return { overdue: 0, thisWeek: 0, ok: 0 };
+    let overdue = 0,
+      thisWeek = 0,
+      ok = 0;
+    for (const d of deadlines) {
+      if (d.status === "completed") continue;
+      const urgency = getUrgency(d);
+      if (urgency === "red") overdue++;
+      else if (urgency === "amber") thisWeek++;
+      else ok++;
+    }
+    return { overdue, thisWeek, ok };
+  }, [deadlines]);
+
+  if (isLoading) {
+    return (
+      <div className="space-y-3">
+        {[1, 2, 3, 4, 5].map((i) => (
+          <div
+            key={i}
+            className="h-16 animate-pulse rounded-lg bg-neutral-100"
+          />
+        ))}
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-4">
+      {/* Summary cards */}
+      <div className="grid grid-cols-3 gap-3">
+        <button
+          onClick={() =>
+            setStatusFilter(statusFilter === "overdue" ? "all" : "overdue")
+          }
+          className={`rounded-lg border p-3 text-left transition-all ${
+            statusFilter === "overdue"
+              ? "border-red-300 bg-red-50 ring-1 ring-red-200"
+              : "border-neutral-200 bg-white hover:bg-neutral-50"
+          }`}
+        >
+          <div className="text-2xl font-semibold tabular-nums text-red-600">
+            {counts.overdue}
+          </div>
+          <div className="text-xs text-neutral-500">Überfällig</div>
+        </button>
+        <button
+          onClick={() =>
+            setStatusFilter(statusFilter === "pending" ? "all" : "pending")
+          }
+          className={`rounded-lg border p-3 text-left transition-all ${
+            statusFilter === "pending"
+              ? "border-amber-300 bg-amber-50 ring-1 ring-amber-200"
+              : "border-neutral-200 bg-white hover:bg-neutral-50"
+          }`}
+        >
+          <div className="text-2xl font-semibold tabular-nums text-amber-600">
+            {counts.thisWeek}
+          </div>
+          <div className="text-xs text-neutral-500">Diese Woche</div>
+        </button>
+        <button
+          onClick={() => setStatusFilter("all")}
+          className={`rounded-lg border p-3 text-left transition-all ${
+            statusFilter === "all"
+              ? "border-green-300 bg-green-50 ring-1 ring-green-200"
+              : "border-neutral-200 bg-white hover:bg-neutral-50"
+          }`}
+        >
+          <div className="text-2xl font-semibold tabular-nums text-green-600">
+            {counts.ok}
+          </div>
+          <div className="text-xs text-neutral-500">OK</div>
+        </button>
+      </div>
+
+      {/* Filters */}
+      <div className="flex flex-wrap items-center gap-3">
+        <div className="flex items-center gap-1.5 text-sm text-neutral-500">
+          <Filter className="h-3.5 w-3.5" />
+          <span>Filter:</span>
+        </div>
+        <select
+          value={statusFilter}
+          onChange={(e) => setStatusFilter(e.target.value as StatusFilter)}
+          className={selectClass}
+        >
+          <option value="all">Alle Status</option>
+          <option value="pending">Offen</option>
+          <option value="completed">Erledigt</option>
+          <option value="overdue">Überfällig</option>
+        </select>
+        {cases && cases.length > 0 && (
+          <select
+            value={caseFilter}
+            onChange={(e) => setCaseFilter(e.target.value)}
+            className={selectClass}
+          >
+            <option value="all">Alle Akten</option>
+            {cases.map((c) => (
+              <option key={c.id} value={c.id}>
+                {c.case_number} — {c.title}
+              </option>
+            ))}
+          </select>
+        )}
+      </div>
+
+      {/* Deadline list */}
+      {filtered.length === 0 ? (
+        <EmptyState
+          icon={Clock}
+          title="Keine Fristen gefunden"
+          description={
+            statusFilter !== "all" || caseFilter !== "all"
+              ? "Versuchen Sie andere Filtereinstellungen."
+              : "Es sind noch keine Fristen vorhanden."
+          }
+        />
+      ) : (
+        <div className="space-y-2">
+          {filtered.map((deadline) => {
+            const urgency = getUrgency(deadline);
+            const config = urgencyConfig[urgency];
+            const caseInfo = caseMap.get(deadline.case_id);
+
+            return (
+              <div
+                key={deadline.id}
+                className={`flex items-center gap-3 rounded-lg border px-4 py-3 transition-colors ${config.bg} ${config.border}`}
+              >
+                <div
+                  className={`h-2.5 w-2.5 shrink-0 rounded-full ${config.dot}`}
+                />
+                <div className="min-w-0 flex-1">
+                  <div className="flex flex-wrap items-center gap-2">
+                    <span className="truncate text-sm font-medium text-neutral-900">
+                      {deadline.title}
+                    </span>
+                    <span
+                      className={`shrink-0 rounded px-1.5 py-0.5 text-xs font-medium ${config.badge}`}
+                    >
+                      {config.label}
+                    </span>
+                    {deadline.status === "completed" && (
+                      <span className="shrink-0 rounded bg-neutral-100 px-1.5 py-0.5 text-xs font-medium text-neutral-500">
+                        Erledigt
+                      </span>
+                    )}
+                  </div>
+                  <div className="mt-0.5 flex flex-wrap items-center gap-2 text-xs text-neutral-500">
+                    <span>
+                      {format(parseISO(deadline.due_date), "dd. MMM yyyy", {
+                        locale: de,
+                      })}
+                    </span>
+                    {caseInfo && (
+                      <>
+                        <span>·</span>
+                        <span className="truncate">
+                          {caseInfo.case_number} — {caseInfo.title}
+                        </span>
+                      </>
+                    )}
+                    {deadline.source !== "manual" && (
+                      <>
+                        <span>·</span>
+                        <span>{deadline.source}</span>
+                      </>
+                    )}
+                  </div>
+                </div>
+                {deadline.status !== "completed" && (
+                  <button
+                    onClick={() => completeMutation.mutate(deadline.id)}
+                    disabled={completeMutation.isPending}
+                    title="Als erledigt markieren"
+                    className="shrink-0 rounded-md p-1.5 text-neutral-400 transition-colors hover:bg-white hover:text-green-600"
+                  >
+                    <Check className="h-4 w-4" />
+                  </button>
+                )}
+              </div>
+            );
+          })}
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/documents/DocumentList.tsx

@@ -0,0 +1,144 @@
+"use client";
+
+import { useState } from "react";
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { FileText, Download, Trash2, Loader2 } from "lucide-react";
+import { format } from "date-fns";
+import { de } from "date-fns/locale";
+import { toast } from "sonner";
+import { api } from "@/lib/api";
+import type { Document } from "@/lib/types";
+
+const DOC_TYPE_BADGE: Record<string, string> = {
+  schriftsatz: "bg-blue-50 text-blue-700",
+  beschluss: "bg-violet-50 text-violet-700",
+  urteil: "bg-emerald-50 text-emerald-700",
+  gutachten: "bg-amber-50 text-amber-700",
+  vertrag: "bg-cyan-50 text-cyan-700",
+  korrespondenz: "bg-neutral-100 text-neutral-600",
+};
+
+interface DocumentListProps {
+  documents: Document[];
+  caseId: string;
+}
+
+export function DocumentList({ documents, caseId }: DocumentListProps) {
+  const [deleteId, setDeleteId] = useState<string | null>(null);
+  const queryClient = useQueryClient();
+
+  const deleteMutation = useMutation({
+    mutationFn: (docId: string) => api.delete(`/documents/${docId}`),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["case-documents", caseId] });
+      queryClient.invalidateQueries({ queryKey: ["case", caseId] });
+      toast.success("Dokument geloescht");
+      setDeleteId(null);
+    },
+    onError: (err) => {
+      const msg =
+        err && typeof err === "object" && "error" in err
+          ? (err as { error: string }).error
+          : "Unbekannter Fehler";
+      toast.error(`Fehler beim Loeschen: ${msg}`);
+      setDeleteId(null);
+    },
+  });
+
+  if (documents.length === 0) {
+    return (
+      <p className="py-8 text-center text-sm text-neutral-400">
+        Keine Dokumente vorhanden.
+      </p>
+    );
+  }
+
+  return (
+    <div className="space-y-2">
+      {documents.map((doc) => (
+        <div
+          key={doc.id}
+          className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-3"
+        >
+          <div className="flex items-center gap-3 min-w-0">
+            <FileText className="h-4 w-4 shrink-0 text-neutral-400" />
+            <div className="min-w-0">
+              <p className="truncate text-sm font-medium text-neutral-900">
+                {doc.title}
+              </p>
+              <div className="mt-0.5 flex flex-wrap items-center gap-2 text-xs text-neutral-400">
+                {doc.doc_type && (
+                  <span
+                    className={`rounded-full px-2 py-0.5 text-xs font-medium ${
+                      DOC_TYPE_BADGE[doc.doc_type.toLowerCase()] ??
+                      "bg-neutral-100 text-neutral-600"
+                    }`}
+                  >
+                    {doc.doc_type}
+                  </span>
+                )}
+                {doc.file_size != null && (
+                  <span>{formatFileSize(doc.file_size)}</span>
+                )}
+                <span>
+                  {format(new Date(doc.created_at), "d. MMM yyyy", {
+                    locale: de,
+                  })}
+                </span>
+              </div>
+            </div>
+          </div>
+
+          <div className="flex items-center gap-1 shrink-0 ml-3">
+            <a
+              href={`/api/documents/${doc.id}`}
+              className="rounded p-1.5 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+              title="Herunterladen"
+            >
+              <Download className="h-4 w-4" />
+            </a>
+
+            {deleteId === doc.id ? (
+              <div className="flex items-center gap-1">
+                <button
+                  type="button"
+                  onClick={() => deleteMutation.mutate(doc.id)}
+                  disabled={deleteMutation.isPending}
+                  className="rounded px-2 py-1 text-xs font-medium text-red-600 hover:bg-red-50"
+                >
+                  {deleteMutation.isPending ? (
+                    <Loader2 className="h-3.5 w-3.5 animate-spin" />
+                  ) : (
+                    "Loeschen"
+                  )}
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setDeleteId(null)}
+                  className="rounded px-2 py-1 text-xs text-neutral-500 hover:bg-neutral-100"
+                >
+                  Abbrechen
+                </button>
+              </div>
+            ) : (
+              <button
+                type="button"
+                onClick={() => setDeleteId(doc.id)}
+                className="rounded p-1.5 text-neutral-400 hover:bg-neutral-100 hover:text-red-500"
+                title="Loeschen"
+              >
+                <Trash2 className="h-4 w-4" />
+              </button>
+            )}
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+}
+
+function formatFileSize(bytes: number): string {
+  if (bytes < 1024) return `${bytes} B`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} KB`;
+  return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
+}

frontend/src/components/documents/DocumentUpload.tsx

@@ -0,0 +1,144 @@
+"use client";
+
+import { useCallback, useState } from "react";
+import { useDropzone } from "react-dropzone";
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { Upload, FileText, X, Loader2 } from "lucide-react";
+import { toast } from "sonner";
+import { api } from "@/lib/api";
+import type { Document } from "@/lib/types";
+
+interface DocumentUploadProps {
+  caseId: string;
+}
+
+export function DocumentUpload({ caseId }: DocumentUploadProps) {
+  const [files, setFiles] = useState<File[]>([]);
+  const queryClient = useQueryClient();
+
+  const uploadMutation = useMutation({
+    mutationFn: async (file: File) => {
+      const formData = new FormData();
+      formData.append("file", file);
+      formData.append("title", file.name);
+      return api.postFormData<Document>(`/cases/${caseId}/documents`, formData);
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["case-documents", caseId] });
+      queryClient.invalidateQueries({ queryKey: ["case", caseId] });
+    },
+  });
+
+  const onDrop = useCallback((acceptedFiles: File[]) => {
+    setFiles((prev) => [...prev, ...acceptedFiles]);
+  }, []);
+
+  const { getRootProps, getInputProps, isDragActive } = useDropzone({
+    onDrop,
+    disabled: uploadMutation.isPending,
+  });
+
+  function removeFile(index: number) {
+    setFiles((prev) => prev.filter((_, i) => i !== index));
+  }
+
+  async function handleUpload() {
+    if (files.length === 0) return;
+
+    let successCount = 0;
+    for (const file of files) {
+      try {
+        await uploadMutation.mutateAsync(file);
+        successCount++;
+      } catch (err) {
+        const msg =
+          err && typeof err === "object" && "error" in err
+            ? (err as { error: string }).error
+            : file.name;
+        toast.error(`Fehler beim Hochladen: ${msg}`);
+      }
+    }
+
+    if (successCount > 0) {
+      toast.success(
+        successCount === 1
+          ? "Dokument hochgeladen"
+          : `${successCount} Dokumente hochgeladen`,
+      );
+      setFiles([]);
+    }
+  }
+
+  return (
+    <div className="space-y-3">
+      <div
+        {...getRootProps()}
+        className={`cursor-pointer rounded-md border-2 border-dashed px-6 py-6 text-center transition-colors ${
+          isDragActive
+            ? "border-neutral-500 bg-neutral-50"
+            : "border-neutral-300 hover:border-neutral-400"
+        } ${uploadMutation.isPending ? "pointer-events-none opacity-50" : ""}`}
+      >
+        <input {...getInputProps()} />
+        <Upload className="mx-auto h-6 w-6 text-neutral-400" />
+        <p className="mt-2 text-sm text-neutral-600">
+          Dateien hierher ziehen oder{" "}
+          <span className="font-medium text-neutral-900">durchsuchen</span>
+        </p>
+        <p className="mt-1 text-xs text-neutral-400">Max. 50 MB pro Datei</p>
+      </div>
+
+      {files.length > 0 && (
+        <div className="space-y-2">
+          {files.map((file, i) => (
+            <div
+              key={`${file.name}-${i}`}
+              className="flex items-center gap-3 rounded-md border border-neutral-200 bg-neutral-50 px-3 py-2"
+            >
+              <FileText className="h-4 w-4 shrink-0 text-neutral-500" />
+              <div className="min-w-0 flex-1">
+                <p className="truncate text-sm text-neutral-900">{file.name}</p>
+                <p className="text-xs text-neutral-400">
+                  {formatFileSize(file.size)}
+                </p>
+              </div>
+              <button
+                type="button"
+                onClick={() => removeFile(i)}
+                disabled={uploadMutation.isPending}
+                className="rounded p-1 text-neutral-400 hover:bg-neutral-200 hover:text-neutral-600"
+              >
+                <X className="h-3.5 w-3.5" />
+              </button>
+            </div>
+          ))}
+
+          <button
+            type="button"
+            onClick={handleUpload}
+            disabled={uploadMutation.isPending}
+            className="inline-flex items-center gap-2 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white hover:bg-neutral-800 disabled:opacity-50"
+          >
+            {uploadMutation.isPending ? (
+              <>
+                <Loader2 className="h-3.5 w-3.5 animate-spin" />
+                Hochladen...
+              </>
+            ) : (
+              <>
+                <Upload className="h-3.5 w-3.5" />
+                {files.length === 1 ? "Hochladen" : `${files.length} Dateien hochladen`}
+              </>
+            )}
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
+
+function formatFileSize(bytes: number): string {
+  if (bytes < 1024) return `${bytes} B`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} KB`;
+  return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
+}

frontend/src/components/layout/Header.tsx

@@ -25,16 +25,19 @@ export function Header() {
 
   return (
     <header className="flex h-14 items-center justify-between border-b border-neutral-200 bg-white px-4">
-      <div />
-      <div className="flex items-center gap-3">
+      {/* Spacer for mobile hamburger */}
+      <div className="w-8 lg:w-0" />
+      <div className="flex items-center gap-2 sm:gap-3">
         <TenantSwitcher />
         {email && (
-          <span className="text-sm text-neutral-500">{email}</span>
+          <span className="hidden text-sm text-neutral-500 sm:inline">
+            {email}
+          </span>
         )}
         <button
           onClick={handleLogout}
           title="Abmelden"
-          className="rounded-md p-1.5 text-neutral-400 hover:bg-neutral-100 hover:text-neutral-600"
+          className="rounded-md p-1.5 text-neutral-400 transition-colors hover:bg-neutral-100 hover:text-neutral-600"
         >
           <LogOut className="h-4 w-4" />
         </button>

frontend/src/components/layout/Sidebar.tsx

@@ -9,36 +9,59 @@ import {
   Calendar,
   Brain,
   Settings,
+  Menu,
+  X,
 } from "lucide-react";
+import { useState, useEffect } from "react";
 
 const navigation = [
-  { name: "Dashboard", href: "/", icon: LayoutDashboard },
+  { name: "Dashboard", href: "/dashboard", icon: LayoutDashboard },
   { name: "Akten", href: "/cases", icon: FolderOpen },
   { name: "Fristen", href: "/fristen", icon: Clock },
   { name: "Termine", href: "/termine", icon: Calendar },
-  { name: "AI Analyse", href: "/ai", icon: Brain },
+  { name: "AI Analyse", href: "/ai/extract", icon: Brain },
   { name: "Einstellungen", href: "/einstellungen", icon: Settings },
 ];
 
 export function Sidebar() {
   const pathname = usePathname();
+  const [mobileOpen, setMobileOpen] = useState(false);
 
-  return (
-    <aside className="flex h-full w-56 flex-col border-r border-neutral-200 bg-white">
-      <div className="flex h-14 items-center border-b border-neutral-200 px-4">
+  // Close on route change
+  useEffect(() => {
+    setMobileOpen(false);
+  }, [pathname]);
+
+  // Close on escape
+  useEffect(() => {
+    function onKeyDown(e: KeyboardEvent) {
+      if (e.key === "Escape") setMobileOpen(false);
+    }
+    document.addEventListener("keydown", onKeyDown);
+    return () => document.removeEventListener("keydown", onKeyDown);
+  }, []);
+
+  const navContent = (
+    <>
+      <div className="flex h-14 items-center justify-between border-b border-neutral-200 px-4">
         <span className="text-sm font-semibold text-neutral-900">KanzlAI</span>
+        <button
+          onClick={() => setMobileOpen(false)}
+          className="rounded-md p-1 text-neutral-400 transition-colors hover:bg-neutral-100 hover:text-neutral-600 lg:hidden"
+          aria-label="Menü schließen"
+        >
+          <X className="h-4 w-4" />
+        </button>
       </div>
       <nav className="flex-1 space-y-0.5 p-2">
         {navigation.map((item) => {
           const isActive =
-            item.href === "/"
-              ? pathname === "/"
-              : pathname.startsWith(item.href);
+            pathname === item.href || pathname.startsWith(item.href + "/");
           return (
             <Link
               key={item.href}
               href={item.href}
-              className={`flex items-center gap-2.5 rounded-md px-2.5 py-1.5 text-sm transition-colors ${
+              className={`flex items-center gap-2.5 rounded-md px-2.5 py-2 text-sm transition-colors ${
                 isActive
                   ? "bg-neutral-100 font-medium text-neutral-900"
                   : "text-neutral-600 hover:bg-neutral-50 hover:text-neutral-900"
@@ -50,6 +73,39 @@ export function Sidebar() {
           );
         })}
       </nav>
-    </aside>
+    </>
+  );
+
+  return (
+    <>
+      {/* Mobile hamburger button */}
+      <button
+        onClick={() => setMobileOpen(true)}
+        className="fixed left-3 top-3.5 z-40 rounded-md bg-white p-1.5 shadow-sm ring-1 ring-neutral-200 transition-colors hover:bg-neutral-50 lg:hidden"
+        aria-label="Menü öffnen"
+      >
+        <Menu className="h-5 w-5 text-neutral-700" />
+      </button>
+
+      {/* Mobile overlay */}
+      {mobileOpen && (
+        <div
+          className="fixed inset-0 z-40 bg-black/20 backdrop-blur-sm lg:hidden"
+          onClick={() => setMobileOpen(false)}
+        />
+      )}
+
+      {/* Mobile sidebar */}
+      {mobileOpen && (
+        <aside className="animate-slide-in-left fixed inset-y-0 left-0 z-50 flex w-56 flex-col border-r border-neutral-200 bg-white shadow-lg lg:hidden">
+          {navContent}
+        </aside>
+      )}
+
+      {/* Desktop sidebar */}
+      <aside className="hidden h-full w-56 flex-col border-r border-neutral-200 bg-white lg:flex">
+        {navContent}
+      </aside>
+    </>
   );
 }

frontend/src/components/layout/TenantSwitcher.tsx

@@ -12,17 +12,20 @@ export function TenantSwitcher() {
   const ref = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
-    api.get<TenantWithRole[]>("/tenants").then((data) => {
-      setTenants(data);
-      const savedId = localStorage.getItem("kanzlai_tenant_id");
-      const match = data.find((t) => t.id === savedId) || data[0];
-      if (match) {
-        setCurrent(match);
-        localStorage.setItem("kanzlai_tenant_id", match.id);
-      }
-    }).catch(() => {
-      // Not authenticated or no tenants
-    });
+    api
+      .get<TenantWithRole[]>("/tenants")
+      .then((data) => {
+        setTenants(data);
+        const savedId = localStorage.getItem("kanzlai_tenant_id");
+        const match = data.find((t) => t.id === savedId) || data[0];
+        if (match) {
+          setCurrent(match);
+          localStorage.setItem("kanzlai_tenant_id", match.id);
+        }
+      })
+      .catch(() => {
+        // Not authenticated or no tenants
+      });
   }, []);
 
   useEffect(() => {
@@ -48,14 +51,16 @@ export function TenantSwitcher() {
     <div ref={ref} className="relative">
       <button
         onClick={() => setOpen(!open)}
-        className="flex items-center gap-1.5 rounded-md border border-neutral-200 bg-white px-2.5 py-1.5 text-sm text-neutral-700 hover:bg-neutral-50"
+        className="flex items-center gap-1.5 rounded-md border border-neutral-200 bg-white px-2.5 py-1.5 text-sm text-neutral-700 transition-colors hover:bg-neutral-50"
       >
-        <span className="max-w-[160px] truncate">{current.name}</span>
+        <span className="max-w-[120px] truncate sm:max-w-[160px]">
+          {current.name}
+        </span>
         <ChevronsUpDown className="h-3.5 w-3.5 text-neutral-400" />
       </button>
 
       {open && tenants.length > 1 && (
-        <div className="absolute right-0 top-full z-50 mt-1 w-56 rounded-md border border-neutral-200 bg-white py-1 shadow-lg">
+        <div className="animate-fade-in absolute right-0 top-full z-50 mt-1 w-56 rounded-md border border-neutral-200 bg-white py-1 shadow-lg">
           {tenants.map((tenant) => (
             <button
               key={tenant.id}

frontend/src/components/settings/CalDAVSettings.tsx

@@ -0,0 +1,329 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
+import {
+  RefreshCw,
+  CheckCircle2,
+  AlertCircle,
+  Clock,
+  ArrowUpDown,
+} from "lucide-react";
+import { api } from "@/lib/api";
+import type {
+  Tenant,
+  CalDAVConfig,
+  CalDAVSyncResponse,
+} from "@/lib/types";
+
+const SYNC_INTERVALS = [
+  { value: 5, label: "5 Minuten" },
+  { value: 15, label: "15 Minuten" },
+  { value: 30, label: "30 Minuten" },
+  { value: 60, label: "1 Stunde" },
+  { value: 120, label: "2 Stunden" },
+  { value: 360, label: "6 Stunden" },
+];
+
+const emptyConfig: CalDAVConfig = {
+  url: "",
+  username: "",
+  password: "",
+  calendar_path: "",
+  sync_enabled: false,
+  sync_interval_minutes: 15,
+};
+
+export function CalDAVSettings({ tenant }: { tenant: Tenant }) {
+  const queryClient = useQueryClient();
+  const existing = (tenant.settings as Record<string, unknown>)?.caldav as
+    | Partial<CalDAVConfig>
+    | undefined;
+  const [config, setConfig] = useState<CalDAVConfig>({
+    ...emptyConfig,
+    ...existing,
+  });
+  const [showPassword, setShowPassword] = useState(false);
+
+  // Reset form when tenant changes
+  useEffect(() => {
+    const caldav = (tenant.settings as Record<string, unknown>)?.caldav as
+      | Partial<CalDAVConfig>
+      | undefined;
+    setConfig({ ...emptyConfig, ...caldav });
+  }, [tenant]);
+
+  // Fetch sync status
+  const { data: syncStatus } = useQuery({
+    queryKey: ["caldav-status"],
+    queryFn: () => api.get<CalDAVSyncResponse>("/api/caldav/status"),
+    refetchInterval: 30_000,
+  });
+
+  // Save settings
+  const saveMutation = useMutation({
+    mutationFn: (cfg: CalDAVConfig) => {
+      const tenantId =
+        typeof window !== "undefined"
+          ? localStorage.getItem("kanzlai_tenant_id")
+          : null;
+      return api.put<Tenant>(`/api/tenants/${tenantId}/settings`, {
+        caldav: cfg,
+      });
+    },
+    onSuccess: (updated) => {
+      queryClient.setQueryData(["tenant-current"], updated);
+      toast.success("CalDAV-Einstellungen gespeichert");
+    },
+    onError: () => {
+      toast.error("Fehler beim Speichern der CalDAV-Einstellungen");
+    },
+  });
+
+  // Trigger sync
+  const syncMutation = useMutation({
+    mutationFn: () => api.post<CalDAVSyncResponse>("/api/caldav/sync"),
+    onSuccess: (result) => {
+      queryClient.invalidateQueries({ queryKey: ["caldav-status"] });
+      if (result.status === "ok") {
+        toast.success(
+          `Synchronisierung abgeschlossen: ${result.sync.items_pushed} gesendet, ${result.sync.items_pulled} empfangen`
+        );
+      } else {
+        toast.error("Synchronisierung mit Fehlern abgeschlossen");
+      }
+    },
+    onError: () => {
+      toast.error("Fehler bei der Synchronisierung");
+    },
+  });
+
+  const handleSave = (e: React.FormEvent) => {
+    e.preventDefault();
+    saveMutation.mutate(config);
+  };
+
+  const hasConfig = config.url && config.username && config.password;
+
+  return (
+    <div className="space-y-6">
+      {/* CalDAV Configuration Form */}
+      <form onSubmit={handleSave} className="space-y-4">
+        <div className="grid gap-4 sm:grid-cols-2">
+          <div className="sm:col-span-2">
+            <label className="mb-1 block text-sm font-medium text-neutral-700">
+              CalDAV-Server URL
+            </label>
+            <input
+              type="url"
+              value={config.url}
+              onChange={(e) =>
+                setConfig((c) => ({ ...c, url: e.target.value }))
+              }
+              placeholder="https://dav.example.com/dav"
+              className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+            />
+          </div>
+
+          <div>
+            <label className="mb-1 block text-sm font-medium text-neutral-700">
+              Benutzername
+            </label>
+            <input
+              type="text"
+              value={config.username}
+              onChange={(e) =>
+                setConfig((c) => ({ ...c, username: e.target.value }))
+              }
+              placeholder="user@example.com"
+              className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+            />
+          </div>
+
+          <div>
+            <label className="mb-1 block text-sm font-medium text-neutral-700">
+              Passwort
+            </label>
+            <div className="relative">
+              <input
+                type={showPassword ? "text" : "password"}
+                value={config.password}
+                onChange={(e) =>
+                  setConfig((c) => ({ ...c, password: e.target.value }))
+                }
+                placeholder="••••••••"
+                className="w-full rounded-md border border-neutral-200 px-3 py-1.5 pr-16 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+              />
+              <button
+                type="button"
+                onClick={() => setShowPassword(!showPassword)}
+                className="absolute right-2 top-1/2 -translate-y-1/2 text-xs text-neutral-500 hover:text-neutral-700"
+              >
+                {showPassword ? "Verbergen" : "Anzeigen"}
+              </button>
+            </div>
+          </div>
+
+          <div className="sm:col-span-2">
+            <label className="mb-1 block text-sm font-medium text-neutral-700">
+              Kalender-Pfad
+            </label>
+            <input
+              type="text"
+              value={config.calendar_path}
+              onChange={(e) =>
+                setConfig((c) => ({ ...c, calendar_path: e.target.value }))
+              }
+              placeholder="/dav/calendars/user/default/"
+              className="w-full rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+            />
+            <p className="mt-1 text-xs text-neutral-400">
+              Pfad zum Kalender auf dem CalDAV-Server
+            </p>
+          </div>
+        </div>
+
+        {/* Sync Settings */}
+        <div className="flex flex-col gap-4 border-t border-neutral-200 pt-4 sm:flex-row sm:items-center sm:justify-between">
+          <label className="flex items-center gap-2.5">
+            <input
+              type="checkbox"
+              checked={config.sync_enabled}
+              onChange={(e) =>
+                setConfig((c) => ({ ...c, sync_enabled: e.target.checked }))
+              }
+              className="h-4 w-4 rounded border-neutral-300 text-neutral-900 focus:ring-neutral-400"
+            />
+            <span className="text-sm font-medium text-neutral-700">
+              Automatische Synchronisierung
+            </span>
+          </label>
+
+          <div className="flex items-center gap-2">
+            <label className="text-sm text-neutral-500">Intervall:</label>
+            <select
+              value={config.sync_interval_minutes}
+              onChange={(e) =>
+                setConfig((c) => ({
+                  ...c,
+                  sync_interval_minutes: Number(e.target.value),
+                }))
+              }
+              disabled={!config.sync_enabled}
+              className="rounded-md border border-neutral-200 px-2 py-1 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400 disabled:opacity-50"
+            >
+              {SYNC_INTERVALS.map((opt) => (
+                <option key={opt.value} value={opt.value}>
+                  {opt.label}
+                </option>
+              ))}
+            </select>
+          </div>
+        </div>
+
+        <div className="flex items-center gap-3 border-t border-neutral-200 pt-4">
+          <button
+            type="submit"
+            disabled={saveMutation.isPending}
+            className="rounded-md bg-neutral-900 px-4 py-1.5 text-sm font-medium text-white hover:bg-neutral-800 disabled:opacity-50"
+          >
+            {saveMutation.isPending ? "Speichern..." : "Speichern"}
+          </button>
+
+          {hasConfig && (
+            <button
+              type="button"
+              onClick={() => syncMutation.mutate()}
+              disabled={syncMutation.isPending}
+              className="inline-flex items-center gap-1.5 rounded-md border border-neutral-200 bg-white px-4 py-1.5 text-sm font-medium text-neutral-700 hover:bg-neutral-50 disabled:opacity-50"
+            >
+              <RefreshCw
+                className={`h-3.5 w-3.5 ${syncMutation.isPending ? "animate-spin" : ""}`}
+              />
+              {syncMutation.isPending
+                ? "Synchronisiere..."
+                : "Jetzt synchronisieren"}
+            </button>
+          )}
+        </div>
+      </form>
+
+      {/* Sync Status */}
+      {syncStatus && syncStatus.last_sync_at !== null && (
+        <SyncStatusDisplay data={syncStatus} />
+      )}
+    </div>
+  );
+}
+
+function SyncStatusDisplay({ data }: { data: CalDAVSyncResponse }) {
+  const hasErrors = data.sync?.errors && data.sync.errors.length > 0;
+  const lastSync = data.sync?.last_sync_at
+    ? new Date(data.sync.last_sync_at)
+    : null;
+
+  return (
+    <div
+      className={`rounded-lg border p-4 ${
+        hasErrors
+          ? "border-red-200 bg-red-50"
+          : "border-emerald-200 bg-emerald-50"
+      }`}
+    >
+      <div className="flex items-start gap-3">
+        {hasErrors ? (
+          <AlertCircle className="mt-0.5 h-4 w-4 shrink-0 text-red-600" />
+        ) : (
+          <CheckCircle2 className="mt-0.5 h-4 w-4 shrink-0 text-emerald-600" />
+        )}
+        <div className="min-w-0 flex-1">
+          <p
+            className={`text-sm font-medium ${hasErrors ? "text-red-800" : "text-emerald-800"}`}
+          >
+            {hasErrors
+              ? "Letzte Synchronisierung mit Fehlern"
+              : "Letzte Synchronisierung erfolgreich"}
+          </p>
+
+          <div className="mt-2 flex flex-wrap gap-x-4 gap-y-1 text-xs">
+            {lastSync && (
+              <span className="inline-flex items-center gap-1 text-neutral-600">
+                <Clock className="h-3 w-3" />
+                {lastSync.toLocaleDateString("de-DE", {
+                  day: "2-digit",
+                  month: "2-digit",
+                  year: "numeric",
+                })}{" "}
+                {lastSync.toLocaleTimeString("de-DE", {
+                  hour: "2-digit",
+                  minute: "2-digit",
+                })}
+              </span>
+            )}
+            <span className="inline-flex items-center gap-1 text-neutral-600">
+              <ArrowUpDown className="h-3 w-3" />
+              {data.sync.items_pushed} gesendet, {data.sync.items_pulled}{" "}
+              empfangen
+            </span>
+            {data.sync.sync_duration && (
+              <span className="text-neutral-400">
+                Dauer: {data.sync.sync_duration}
+              </span>
+            )}
+          </div>
+
+          {hasErrors && (
+            <div className="mt-2 space-y-1">
+              {data.sync.errors!.map((err, i) => (
+                <p key={i} className="text-xs text-red-700">
+                  {err}
+                </p>
+              ))}
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}

frontend/src/components/settings/TeamSettings.tsx

@@ -0,0 +1,167 @@
+"use client";
+
+import { useState } from "react";
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
+import { UserPlus, Trash2, Shield, Crown, User } from "lucide-react";
+import { api } from "@/lib/api";
+import type { UserTenant } from "@/lib/types";
+import { Skeleton } from "@/components/ui/Skeleton";
+import { EmptyState } from "@/components/ui/EmptyState";
+
+const ROLE_LABELS: Record<string, { label: string; icon: typeof Crown }> = {
+  owner: { label: "Eigentümer", icon: Crown },
+  admin: { label: "Administrator", icon: Shield },
+  member: { label: "Mitglied", icon: User },
+};
+
+export function TeamSettings() {
+  const queryClient = useQueryClient();
+  const tenantId =
+    typeof window !== "undefined"
+      ? localStorage.getItem("kanzlai_tenant_id")
+      : null;
+
+  const [email, setEmail] = useState("");
+  const [role, setRole] = useState("member");
+
+  const {
+    data: members,
+    isLoading,
+    error,
+  } = useQuery({
+    queryKey: ["tenant-members", tenantId],
+    queryFn: () =>
+      api.get<UserTenant[]>(`/api/tenants/${tenantId}/members`),
+    enabled: !!tenantId,
+  });
+
+  const inviteMutation = useMutation({
+    mutationFn: (data: { email: string; role: string }) =>
+      api.post(`/api/tenants/${tenantId}/invite`, data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["tenant-members"] });
+      setEmail("");
+      setRole("member");
+      toast.success("Benutzer eingeladen");
+    },
+    onError: (err: { error?: string }) => {
+      toast.error(err.error || "Fehler beim Einladen");
+    },
+  });
+
+  const removeMutation = useMutation({
+    mutationFn: (userId: string) =>
+      api.delete(`/api/tenants/${tenantId}/members/${userId}`),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["tenant-members"] });
+      toast.success("Mitglied entfernt");
+    },
+    onError: (err: { error?: string }) => {
+      toast.error(err.error || "Fehler beim Entfernen");
+    },
+  });
+
+  const handleInvite = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (!email.trim()) return;
+    inviteMutation.mutate({ email: email.trim(), role });
+  };
+
+  if (isLoading) {
+    return (
+      <div className="space-y-3">
+        <Skeleton className="h-10 w-full" />
+        <Skeleton className="h-10 w-full" />
+        <Skeleton className="h-10 w-full" />
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <EmptyState
+        icon={User}
+        title="Fehler beim Laden"
+        description="Team-Mitglieder konnten nicht geladen werden."
+      />
+    );
+  }
+
+  return (
+    <div className="space-y-6">
+      {/* Invite Form */}
+      <form onSubmit={handleInvite} className="flex flex-col gap-3 sm:flex-row">
+        <input
+          type="email"
+          value={email}
+          onChange={(e) => setEmail(e.target.value)}
+          placeholder="name@example.com"
+          className="flex-1 rounded-md border border-neutral-200 px-3 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+        />
+        <select
+          value={role}
+          onChange={(e) => setRole(e.target.value)}
+          className="rounded-md border border-neutral-200 px-2 py-1.5 text-sm outline-none focus:border-neutral-400 focus:ring-1 focus:ring-neutral-400"
+        >
+          <option value="member">Mitglied</option>
+          <option value="admin">Administrator</option>
+        </select>
+        <button
+          type="submit"
+          disabled={inviteMutation.isPending || !email.trim()}
+          className="inline-flex items-center gap-1.5 rounded-md bg-neutral-900 px-4 py-1.5 text-sm font-medium text-white hover:bg-neutral-800 disabled:opacity-50"
+        >
+          <UserPlus className="h-3.5 w-3.5" />
+          {inviteMutation.isPending ? "Einladen..." : "Einladen"}
+        </button>
+      </form>
+
+      {/* Members List */}
+      {members && members.length > 0 ? (
+        <div className="overflow-hidden rounded-md border border-neutral-200">
+          {members.map((member, i) => {
+            const roleInfo = ROLE_LABELS[member.role] || ROLE_LABELS.member;
+            const RoleIcon = roleInfo.icon;
+            return (
+              <div
+                key={member.user_id}
+                className={`flex items-center justify-between px-4 py-3 ${
+                  i < members.length - 1 ? "border-b border-neutral-100" : ""
+                }`}
+              >
+                <div className="flex items-center gap-3">
+                  <div className="flex h-8 w-8 items-center justify-center rounded-full bg-neutral-100">
+                    <RoleIcon className="h-4 w-4 text-neutral-500" />
+                  </div>
+                  <div>
+                    <p className="text-sm font-medium text-neutral-900">
+                      {member.user_id.slice(0, 8)}...
+                    </p>
+                    <p className="text-xs text-neutral-500">{roleInfo.label}</p>
+                  </div>
+                </div>
+                {member.role !== "owner" && (
+                  <button
+                    onClick={() => removeMutation.mutate(member.user_id)}
+                    disabled={removeMutation.isPending}
+                    className="rounded-md p-1.5 text-neutral-400 hover:bg-red-50 hover:text-red-600 disabled:opacity-50"
+                    title="Mitglied entfernen"
+                  >
+                    <Trash2 className="h-4 w-4" />
+                  </button>
+                )}
+              </div>
+            );
+          })}
+        </div>
+      ) : (
+        <EmptyState
+          icon={User}
+          title="Noch keine Mitglieder"
+          description="Laden Sie Teammitglieder per E-Mail ein."
+        />
+      )}
+    </div>
+  );
+}

frontend/src/components/ui/EmptyState.tsx

@@ -0,0 +1,28 @@
+import type { LucideIcon } from "lucide-react";
+
+interface EmptyStateProps {
+  icon: LucideIcon;
+  title: string;
+  description?: string;
+  action?: React.ReactNode;
+}
+
+export function EmptyState({
+  icon: Icon,
+  title,
+  description,
+  action,
+}: EmptyStateProps) {
+  return (
+    <div className="flex flex-col items-center justify-center rounded-xl border border-dashed border-neutral-300 bg-white px-6 py-12 text-center">
+      <div className="rounded-xl bg-neutral-100 p-3">
+        <Icon className="h-6 w-6 text-neutral-400" />
+      </div>
+      <h3 className="mt-3 text-sm font-medium text-neutral-900">{title}</h3>
+      {description && (
+        <p className="mt-1 max-w-sm text-sm text-neutral-500">{description}</p>
+      )}
+      {action && <div className="mt-4">{action}</div>}
+    </div>
+  );
+}

frontend/src/components/ui/Skeleton.tsx

@@ -0,0 +1,43 @@
+export function Skeleton({ className = "" }: { className?: string }) {
+  return (
+    <div
+      className={`animate-pulse rounded-md bg-neutral-200/60 ${className}`}
+    />
+  );
+}
+
+export function SkeletonCard({ className = "" }: { className?: string }) {
+  return (
+    <div
+      className={`rounded-xl border border-neutral-200 bg-white p-5 ${className}`}
+    >
+      <Skeleton className="h-4 w-24" />
+      <div className="mt-4 space-y-3">
+        <Skeleton className="h-3 w-full" />
+        <Skeleton className="h-3 w-3/4" />
+        <Skeleton className="h-3 w-1/2" />
+      </div>
+    </div>
+  );
+}
+
+export function SkeletonTable({ rows = 5 }: { rows?: number }) {
+  return (
+    <div className="overflow-hidden rounded-md border border-neutral-200 bg-white">
+      <div className="border-b border-neutral-100 px-4 py-3">
+        <Skeleton className="h-3 w-full" />
+      </div>
+      {Array.from({ length: rows }).map((_, i) => (
+        <div
+          key={i}
+          className="flex items-center gap-4 border-b border-neutral-100 px-4 py-3 last:border-b-0"
+        >
+          <Skeleton className="h-3 w-20" />
+          <Skeleton className="h-3 flex-1" />
+          <Skeleton className="h-3 w-16" />
+          <Skeleton className="h-3 w-12" />
+        </div>
+      ))}
+    </div>
+  );
+}

frontend/src/lib/api.ts

@@ -69,9 +69,51 @@ class ApiClient {
     });
   }
 
+  patch<T>(path: string, body?: unknown) {
+    return this.request<T>(path, {
+      method: "PATCH",
+      body: body ? JSON.stringify(body) : undefined,
+    });
+  }
+
   delete<T>(path: string) {
     return this.request<T>(path, { method: "DELETE" });
   }
+
+  async postFormData<T>(path: string, formData: FormData): Promise<T> {
+    const supabase = createClient();
+    const {
+      data: { session },
+    } = await supabase.auth.getSession();
+
+    const headers: HeadersInit = {};
+    if (session?.access_token) {
+      headers["Authorization"] = `Bearer ${session.access_token}`;
+    }
+    const tenantId = typeof window !== "undefined"
+      ? localStorage.getItem("kanzlai_tenant_id")
+      : null;
+    if (tenantId) {
+      headers["X-Tenant-ID"] = tenantId;
+    }
+
+    const res = await fetch(`${this.baseUrl}${path}`, {
+      method: "POST",
+      headers,
+      body: formData,
+    });
+
+    if (!res.ok) {
+      const body = await res.json().catch(() => ({}));
+      const err: ApiError = {
+        error: body.error || res.statusText,
+        status: res.status,
+      };
+      throw err;
+    }
+
+    return res.json();
+  }
 }
 
 export const api = new ApiClient();

frontend/src/lib/types.ts

@@ -104,6 +104,78 @@ export interface Document {
   updated_at: string;
 }
 
+export interface DeadlineRule {
+  id: string;
+  proceeding_type_id?: number;
+  parent_id?: string;
+  code?: string;
+  name: string;
+  description?: string;
+  primary_party?: string;
+  event_type?: string;
+  is_mandatory: boolean;
+  duration_value: number;
+  duration_unit: string;
+  timing?: string;
+  rule_code?: string;
+  deadline_notes?: string;
+  sequence_order: number;
+}
+
+export interface RuleTreeNode extends DeadlineRule {
+  children?: RuleTreeNode[];
+}
+
+export interface ProceedingType {
+  id: number;
+  code: string;
+  name: string;
+  description?: string;
+  jurisdiction?: string;
+  default_color: string;
+  sort_order: number;
+  is_active: boolean;
+}
+
+export interface CalculatedDeadline {
+  rule_code: string;
+  rule_id: string;
+  title: string;
+  due_date: string;
+  original_due_date: string;
+  was_adjusted: boolean;
+}
+
+export interface CalculateResponse {
+  proceeding_type: string;
+  trigger_event_date: string;
+  deadlines: CalculatedDeadline[];
+}
+
+export interface CalDAVConfig {
+  url: string;
+  username: string;
+  password: string;
+  calendar_path: string;
+  sync_enabled: boolean;
+  sync_interval_minutes: number;
+}
+
+export interface CalDAVSyncStatus {
+  tenant_id: string;
+  last_sync_at: string;
+  items_pushed: number;
+  items_pulled: number;
+  errors?: string[];
+  sync_duration: string;
+}
+
+export interface CalDAVSyncResponse {
+  status: string;
+  sync: CalDAVSyncStatus;
+  last_sync_at?: null;
+}
+
 export interface ApiError {
   error: string;
   status: number;
@@ -115,3 +187,62 @@ export interface PaginatedResponse<T> {
   page: number;
   per_page: number;
 }
+
+// Dashboard types
+
+export interface DeadlineSummary {
+  overdue_count: number;
+  due_this_week: number;
+  due_next_week: number;
+  ok_count: number;
+}
+
+export interface CaseSummary {
+  active_count: number;
+  new_this_month: number;
+  closed_count: number;
+}
+
+export interface UpcomingDeadline {
+  id: string;
+  title: string;
+  due_date: string;
+  case_id: string;
+  case_number: string;
+  case_title: string;
+}
+
+export interface UpcomingAppointment {
+  id: string;
+  title: string;
+  start_at: string;
+  end_at?: string;
+  location?: string;
+  case_id?: string;
+  case_number?: string;
+  case_title?: string;
+}
+
+export interface DashboardData {
+  deadline_summary: DeadlineSummary;
+  case_summary: CaseSummary;
+  upcoming_deadlines: UpcomingDeadline[];
+  upcoming_appointments: UpcomingAppointment[];
+}
+
+// AI Extraction types
+
+export interface ExtractedDeadline {
+  title: string;
+  due_date: string | null;
+  duration_value?: number;
+  duration_unit?: string;
+  rule_reference: string;
+  source_quote: string;
+  confidence: number;
+}
+
+export interface ExtractionResponse {
+  deadlines: ExtractedDeadline[];
+  count: number;
+}