feat: frontend AI tab — KI-Strategie, KI-Entwurf, Aehnliche Faelle

New "KI" tab on case detail page with three sub-panels:
- KI-Strategie: one-click strategic analysis with next steps, risks, timeline
- KI-Entwurf: document drafting with template selection, language, instructions
- Aehnliche Faelle: UPC similar case search with relevance scores

Components: CaseStrategy, DocumentDrafter, SimilarCaseFinder
Types: StrategyRecommendation, DocumentDraft, SimilarCase, etc.

backend/cmd/server/main.go

@@ -5,6 +5,9 @@ import (
 	"net/http"
 	"os"
 
+	"github.com/jmoiron/sqlx"
+	_ "github.com/lib/pq"
+
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/config"
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/db"
@@ -31,6 +34,21 @@ func main() {
 
 	authMW := auth.NewMiddleware(cfg.SupabaseJWTSecret, database)
 
+	// Optional: connect to youpc.org database for similar case finder
+	var youpcDB *sqlx.DB
+	if cfg.YouPCDatabaseURL != "" {
+		youpcDB, err = sqlx.Connect("postgres", cfg.YouPCDatabaseURL)
+		if err != nil {
+			slog.Warn("failed to connect to youpc.org database — similar case finder disabled", "error", err)
+			youpcDB = nil
+		} else {
+			youpcDB.SetMaxOpenConns(5)
+			youpcDB.SetMaxIdleConns(2)
+			defer youpcDB.Close()
+			slog.Info("connected to youpc.org database for similar case finder")
+		}
+	}
+
 	// Start CalDAV sync service
 	calDAVSvc := services.NewCalDAVService(database)
 	calDAVSvc.Start()
@@ -41,7 +59,7 @@ func main() {
 	notifSvc.Start()
 	defer notifSvc.Stop()
 
-	handler := router.New(database, authMW, cfg, calDAVSvc, notifSvc)
+	handler := router.New(database, authMW, cfg, calDAVSvc, notifSvc, youpcDB)
 
 	slog.Info("starting KanzlAI API server", "port", cfg.Port)
 	if err := http.ListenAndServe(":"+cfg.Port, handler); err != nil {

backend/internal/auth/context.go

@@ -11,9 +11,9 @@ type contextKey string
 const (
 	userIDKey    contextKey = "user_id"
 	tenantIDKey  contextKey = "tenant_id"
+	userRoleKey  contextKey = "user_role"
 	ipKey        contextKey = "ip_address"
 	userAgentKey contextKey = "user_agent"
-	userRoleKey  contextKey = "user_role"
 )
 
 func ContextWithUserID(ctx context.Context, userID uuid.UUID) context.Context {
@@ -34,6 +34,15 @@ func TenantFromContext(ctx context.Context) (uuid.UUID, bool) {
 	return id, ok
 }
 
+func ContextWithUserRole(ctx context.Context, role string) context.Context {
+	return context.WithValue(ctx, userRoleKey, role)
+}
+
+func UserRoleFromContext(ctx context.Context) string {
+	role, _ := ctx.Value(userRoleKey).(string)
+	return role
+}
+
 func ContextWithRequestInfo(ctx context.Context, ip, userAgent string) context.Context {
 	ctx = context.WithValue(ctx, ipKey, ip)
 	ctx = context.WithValue(ctx, userAgentKey, userAgent)
@@ -53,12 +62,3 @@ func UserAgentFromContext(ctx context.Context) *string {
 	}
 	return nil
 }
-
-func ContextWithUserRole(ctx context.Context, role string) context.Context {
-	return context.WithValue(ctx, userRoleKey, role)
-}
-
-func UserRoleFromContext(ctx context.Context) string {
-	role, _ := ctx.Value(userRoleKey).(string)
-	return role
-}

backend/internal/auth/middleware.go

@@ -43,7 +43,8 @@ func (m *Middleware) RequireAuth(next http.Handler) http.Handler {
 		}
 		ctx = ContextWithRequestInfo(ctx, ip, r.UserAgent())
 
-		// Tenant and role resolution handled by TenantResolver middleware for scoped routes.
+		// Tenant resolution is handled by TenantResolver middleware for scoped routes.
+		// Tenant management routes handle their own access control.
 		next.ServeHTTP(w, r.WithContext(ctx))
 	})
 }

backend/internal/auth/tenant_resolver.go

@@ -12,6 +12,7 @@ import (
 // Defined as an interface to avoid circular dependency with services.
 type TenantLookup interface {
 	FirstTenantForUser(ctx context.Context, userID uuid.UUID) (*uuid.UUID, error)
+	VerifyAccess(ctx context.Context, userID, tenantID uuid.UUID) (bool, error)
 	GetUserRole(ctx context.Context, userID, tenantID uuid.UUID) (string, error)
 }
 
@@ -34,7 +35,6 @@ func (tr *TenantResolver) Resolve(next http.Handler) http.Handler {
 		}
 
 		var tenantID uuid.UUID
-		ctx := r.Context()
 
 		if header := r.Header.Get("X-Tenant-ID"); header != "" {
 			parsed, err := uuid.Parse(header)
@@ -56,9 +56,9 @@ func (tr *TenantResolver) Resolve(next http.Handler) http.Handler {
 			}
 
 			tenantID = parsed
-			ctx = ContextWithUserRole(ctx, role)
+			r = r.WithContext(ContextWithUserRole(r.Context(), role))
 		} else {
-			// Default to user's first tenant
+			// Default to user's first tenant (role already set by middleware)
 			first, err := tr.lookup.FirstTenantForUser(r.Context(), userID)
 			if err != nil {
 				slog.Error("failed to resolve default tenant", "error", err, "user_id", userID)
@@ -70,18 +70,9 @@ func (tr *TenantResolver) Resolve(next http.Handler) http.Handler {
 				return
 			}
 			tenantID = *first
-
-			// Look up role for default tenant
-			role, err := tr.lookup.GetUserRole(r.Context(), userID, tenantID)
-			if err != nil {
-				slog.Error("failed to get user role", "error", err, "user_id", userID, "tenant_id", tenantID)
-				http.Error(w, `{"error":"internal error"}`, http.StatusInternalServerError)
-				return
-			}
-			ctx = ContextWithUserRole(ctx, role)
 		}
 
-		ctx = ContextWithTenantID(ctx, tenantID)
+		ctx := ContextWithTenantID(r.Context(), tenantID)
 		next.ServeHTTP(w, r.WithContext(ctx))
 	})
 }

backend/internal/auth/tenant_resolver_test.go

@@ -10,32 +10,43 @@ import (
 )
 
 type mockTenantLookup struct {
-	tenantID *uuid.UUID
-	role     string
-	err      error
+	tenantID  *uuid.UUID
+	err       error
+	hasAccess bool
+	accessErr error
+	role      string
+	noAccess  bool // when true, GetUserRole returns ""
 }
 
 func (m *mockTenantLookup) FirstTenantForUser(ctx context.Context, userID uuid.UUID) (*uuid.UUID, error) {
 	return m.tenantID, m.err
 }
 
+func (m *mockTenantLookup) VerifyAccess(ctx context.Context, userID, tenantID uuid.UUID) (bool, error) {
+	return m.hasAccess, m.accessErr
+}
+
 func (m *mockTenantLookup) GetUserRole(ctx context.Context, userID, tenantID uuid.UUID) (string, error) {
-	return m.role, m.err
+	if m.noAccess {
+		return "", m.err
+	}
+	if m.role != "" {
+		return m.role, m.err
+	}
+	return "associate", m.err
 }
 
 func TestTenantResolver_FromHeader(t *testing.T) {
 	tenantID := uuid.New()
-	tr := NewTenantResolver(&mockTenantLookup{role: "partner"})
+	tr := NewTenantResolver(&mockTenantLookup{role: "partner", hasAccess: true})
 
 	var gotTenantID uuid.UUID
-	var gotRole string
 	next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		id, ok := TenantFromContext(r.Context())
 		if !ok {
 			t.Fatal("tenant ID not in context")
 		}
 		gotTenantID = id
-		gotRole = UserRoleFromContext(r.Context())
 		w.WriteHeader(http.StatusOK)
 	})
 
@@ -52,14 +63,11 @@ func TestTenantResolver_FromHeader(t *testing.T) {
 	if gotTenantID != tenantID {
 		t.Errorf("expected tenant %s, got %s", tenantID, gotTenantID)
 	}
-	if gotRole != "partner" {
-		t.Errorf("expected role partner, got %s", gotRole)
-	}
 }
 
 func TestTenantResolver_FromHeader_NoAccess(t *testing.T) {
 	tenantID := uuid.New()
-	tr := NewTenantResolver(&mockTenantLookup{role: ""})
+	tr := NewTenantResolver(&mockTenantLookup{noAccess: true})
 
 	next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		t.Fatal("next should not be called")
@@ -79,7 +87,7 @@ func TestTenantResolver_FromHeader_NoAccess(t *testing.T) {
 
 func TestTenantResolver_DefaultsToFirst(t *testing.T) {
 	tenantID := uuid.New()
-	tr := NewTenantResolver(&mockTenantLookup{tenantID: &tenantID, role: "associate"})
+	tr := NewTenantResolver(&mockTenantLookup{tenantID: &tenantID})
 
 	var gotTenantID uuid.UUID
 	next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

backend/internal/config/config.go

@@ -14,6 +14,7 @@ type Config struct {
 	SupabaseJWTSecret string
 	AnthropicAPIKey   string
 	FrontendOrigin    string
+	YouPCDatabaseURL  string // read-only connection to youpc.org Supabase for similar case finder
 }
 
 func Load() (*Config, error) {
@@ -26,6 +27,7 @@ func Load() (*Config, error) {
 		SupabaseJWTSecret: os.Getenv("SUPABASE_JWT_SECRET"),
 		AnthropicAPIKey:  os.Getenv("ANTHROPIC_API_KEY"),
 		FrontendOrigin:   getEnv("FRONTEND_ORIGIN", "https://kanzlai.msbls.de"),
+		YouPCDatabaseURL: os.Getenv("YOUPC_DATABASE_URL"),
 	}
 
 	if cfg.DatabaseURL == "" {

backend/internal/handlers/ai.go

@@ -5,6 +5,8 @@ import (
 	"io"
 	"net/http"
 
+	"github.com/google/uuid"
+
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
 )
@@ -115,3 +117,139 @@ func (h *AIHandler) SummarizeCase(w http.ResponseWriter, r *http.Request) {
 		"summary": summary,
 	})
 }
+
+// DraftDocument handles POST /api/ai/draft-document
+// Accepts JSON {"case_id": "uuid", "template_type": "string", "instructions": "string", "language": "de|en|fr"}.
+func (h *AIHandler) DraftDocument(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	var body struct {
+		CaseID       string `json:"case_id"`
+		TemplateType string `json:"template_type"`
+		Instructions string `json:"instructions"`
+		Language     string `json:"language"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if body.CaseID == "" {
+		writeError(w, http.StatusBadRequest, "case_id is required")
+		return
+	}
+	if body.TemplateType == "" {
+		writeError(w, http.StatusBadRequest, "template_type is required")
+		return
+	}
+
+	caseID, err := parseUUID(body.CaseID)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid case_id")
+		return
+	}
+
+	if len(body.Instructions) > maxDescriptionLen {
+		writeError(w, http.StatusBadRequest, "instructions exceeds maximum length")
+		return
+	}
+
+	draft, err := h.ai.DraftDocument(r.Context(), tenantID, caseID, body.TemplateType, body.Instructions, body.Language)
+	if err != nil {
+		internalError(w, "AI document drafting failed", err)
+		return
+	}
+
+	writeJSON(w, http.StatusOK, draft)
+}
+
+// CaseStrategy handles POST /api/ai/case-strategy
+// Accepts JSON {"case_id": "uuid"}.
+func (h *AIHandler) CaseStrategy(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	var body struct {
+		CaseID string `json:"case_id"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if body.CaseID == "" {
+		writeError(w, http.StatusBadRequest, "case_id is required")
+		return
+	}
+
+	caseID, err := parseUUID(body.CaseID)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid case_id")
+		return
+	}
+
+	strategy, err := h.ai.CaseStrategy(r.Context(), tenantID, caseID)
+	if err != nil {
+		internalError(w, "AI case strategy analysis failed", err)
+		return
+	}
+
+	writeJSON(w, http.StatusOK, strategy)
+}
+
+// SimilarCases handles POST /api/ai/similar-cases
+// Accepts JSON {"case_id": "uuid", "description": "string"}.
+func (h *AIHandler) SimilarCases(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	var body struct {
+		CaseID      string `json:"case_id"`
+		Description string `json:"description"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if body.CaseID == "" && body.Description == "" {
+		writeError(w, http.StatusBadRequest, "either case_id or description is required")
+		return
+	}
+
+	if len(body.Description) > maxDescriptionLen {
+		writeError(w, http.StatusBadRequest, "description exceeds maximum length")
+		return
+	}
+
+	var caseID uuid.UUID
+	if body.CaseID != "" {
+		var err error
+		caseID, err = parseUUID(body.CaseID)
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "invalid case_id")
+			return
+		}
+	}
+
+	cases, err := h.ai.FindSimilarCases(r.Context(), tenantID, caseID, body.Description)
+	if err != nil {
+		internalError(w, "AI similar case search failed", err)
+		return
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"cases": cases,
+		"count": len(cases),
+	})
+}

backend/internal/handlers/determine.go

@@ -1,127 +0,0 @@
-package handlers
-
-import (
-	"encoding/json"
-	"net/http"
-
-	"github.com/google/uuid"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
-)
-
-// DetermineHandlers holds handlers for deadline determination endpoints
-type DetermineHandlers struct {
-	determine *services.DetermineService
-	deadlines *services.DeadlineService
-}
-
-// NewDetermineHandlers creates determine handlers
-func NewDetermineHandlers(determine *services.DetermineService, deadlines *services.DeadlineService) *DetermineHandlers {
-	return &DetermineHandlers{determine: determine, deadlines: deadlines}
-}
-
-// GetTimeline handles GET /api/proceeding-types/{code}/timeline
-// Returns the full event tree for a proceeding type (no date calculations)
-func (h *DetermineHandlers) GetTimeline(w http.ResponseWriter, r *http.Request) {
-	code := r.PathValue("code")
-	if code == "" {
-		writeError(w, http.StatusBadRequest, "proceeding type code required")
-		return
-	}
-
-	timeline, pt, err := h.determine.GetTimeline(code)
-	if err != nil {
-		writeError(w, http.StatusNotFound, "proceeding type not found")
-		return
-	}
-
-	writeJSON(w, http.StatusOK, map[string]any{
-		"proceeding_type": pt,
-		"timeline":        timeline,
-	})
-}
-
-// Determine handles POST /api/deadlines/determine
-// Calculates the full timeline with cascading dates and conditional logic
-func (h *DetermineHandlers) Determine(w http.ResponseWriter, r *http.Request) {
-	var req services.DetermineRequest
-	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid request body")
-		return
-	}
-
-	if req.ProceedingType == "" || req.TriggerEventDate == "" {
-		writeError(w, http.StatusBadRequest, "proceeding_type and trigger_event_date are required")
-		return
-	}
-
-	resp, err := h.determine.Determine(req)
-	if err != nil {
-		writeError(w, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	writeJSON(w, http.StatusOK, resp)
-}
-
-// BatchCreate handles POST /api/cases/{caseID}/deadlines/batch
-// Creates multiple deadlines on a case from determined timeline
-func (h *DetermineHandlers) BatchCreate(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	caseID, err := parsePathUUID(r, "caseID")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid case ID")
-		return
-	}
-
-	var req struct {
-		Deadlines []struct {
-			Title           string     `json:"title"`
-			DueDate         string     `json:"due_date"`
-			OriginalDueDate *string    `json:"original_due_date,omitempty"`
-			RuleID          *uuid.UUID `json:"rule_id,omitempty"`
-			RuleCode        *string    `json:"rule_code,omitempty"`
-			Notes           *string    `json:"notes,omitempty"`
-		} `json:"deadlines"`
-	}
-	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid request body")
-		return
-	}
-
-	if len(req.Deadlines) == 0 {
-		writeError(w, http.StatusBadRequest, "at least one deadline is required")
-		return
-	}
-
-	var created int
-	for _, d := range req.Deadlines {
-		if d.Title == "" || d.DueDate == "" {
-			continue
-		}
-		input := services.CreateDeadlineInput{
-			CaseID:  caseID,
-			Title:   d.Title,
-			DueDate: d.DueDate,
-			Source:   "determined",
-			RuleID:  d.RuleID,
-			Notes:   d.Notes,
-		}
-		_, err := h.deadlines.Create(r.Context(), tenantID, input)
-		if err != nil {
-			internalError(w, "failed to create deadline", err)
-			return
-		}
-		created++
-	}
-
-	writeJSON(w, http.StatusCreated, map[string]any{
-		"created": created,
-	})
-}

backend/internal/models/deadline_rule.go

@@ -26,8 +26,6 @@ type DeadlineRule struct {
 	AltDurationValue *int       `db:"alt_duration_value" json:"alt_duration_value,omitempty"`
 	AltDurationUnit  *string    `db:"alt_duration_unit" json:"alt_duration_unit,omitempty"`
 	AltRuleCode      *string    `db:"alt_rule_code" json:"alt_rule_code,omitempty"`
-	IsSpawn          bool       `db:"is_spawn" json:"is_spawn"`
-	SpawnLabel       *string    `db:"spawn_label" json:"spawn_label,omitempty"`
 	IsActive         bool       `db:"is_active" json:"is_active"`
 	CreatedAt        time.Time  `db:"created_at" json:"created_at"`
 	UpdatedAt        time.Time  `db:"updated_at" json:"updated_at"`

backend/internal/router/router.go

@@ -15,7 +15,7 @@ import (
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
 )
 
-func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *services.CalDAVService, notifSvc *services.NotificationService) http.Handler {
+func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *services.CalDAVService, notifSvc *services.NotificationService, youpcDB ...*sqlx.DB) http.Handler {
 	mux := http.NewServeMux()
 
 	// Services
@@ -28,7 +28,6 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	deadlineSvc := services.NewDeadlineService(db, auditSvc)
 	deadlineRuleSvc := services.NewDeadlineRuleService(db)
 	calculator := services.NewDeadlineCalculator(holidaySvc)
-	determineSvc := services.NewDetermineService(db, calculator)
 	storageCli := services.NewStorageClient(cfg.SupabaseURL, cfg.SupabaseServiceKey)
 	documentSvc := services.NewDocumentService(db, storageCli, auditSvc)
 	assignmentSvc := services.NewCaseAssignmentService(db)
@@ -36,7 +35,11 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	// AI service (optional — only if API key is configured)
 	var aiH *handlers.AIHandler
 	if cfg.AnthropicAPIKey != "" {
-		aiSvc := services.NewAIService(cfg.AnthropicAPIKey, db)
+		var ydb *sqlx.DB
+		if len(youpcDB) > 0 {
+			ydb = youpcDB[0]
+		}
+		aiSvc := services.NewAIService(cfg.AnthropicAPIKey, db, ydb)
 		aiH = handlers.NewAIHandler(aiSvc)
 	}
 
@@ -61,7 +64,6 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	deadlineH := handlers.NewDeadlineHandlers(deadlineSvc)
 	ruleH := handlers.NewDeadlineRuleHandlers(deadlineRuleSvc)
 	calcH := handlers.NewCalculateHandlers(calculator, deadlineRuleSvc)
-	determineH := handlers.NewDetermineHandlers(determineSvc, deadlineSvc)
 	dashboardH := handlers.NewDashboardHandler(dashboardSvc)
 	noteH := handlers.NewNoteHandler(noteSvc)
 	eventH := handlers.NewCaseEventHandler(db)
@@ -108,7 +110,7 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	scoped.HandleFunc("GET /api/cases", caseH.List)
 	scoped.HandleFunc("POST /api/cases", perm(auth.PermCreateCase, caseH.Create))
 	scoped.HandleFunc("GET /api/cases/{id}", caseH.Get)
-	scoped.HandleFunc("PUT /api/cases/{id}", caseH.Update)
+	scoped.HandleFunc("PUT /api/cases/{id}", caseH.Update)    // case-level access checked in handler
 	scoped.HandleFunc("DELETE /api/cases/{id}", perm(auth.PermCreateCase, caseH.Delete))
 
 	// Parties — same access as case editing
@@ -134,11 +136,6 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	// Deadline calculator — all can use
 	scoped.HandleFunc("POST /api/deadlines/calculate", calcH.Calculate)
 
-	// Deadline determination — full timeline calculation with conditions
-	scoped.HandleFunc("GET /api/proceeding-types/{code}/timeline", determineH.GetTimeline)
-	scoped.HandleFunc("POST /api/deadlines/determine", determineH.Determine)
-	scoped.HandleFunc("POST /api/cases/{caseID}/deadlines/batch", perm(auth.PermManageDeadlines, determineH.BatchCreate))
-
 	// Appointments — all can manage (PermManageAppointments granted to all)
 	scoped.HandleFunc("GET /api/appointments/{id}", apptH.Get)
 	scoped.HandleFunc("GET /api/appointments", apptH.List)
@@ -171,13 +168,16 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	scoped.HandleFunc("POST /api/cases/{id}/documents", perm(auth.PermUploadDocuments, docH.Upload))
 	scoped.HandleFunc("GET /api/documents/{docId}", docH.Download)
 	scoped.HandleFunc("GET /api/documents/{docId}/meta", docH.GetMeta)
-	scoped.HandleFunc("DELETE /api/documents/{docId}", docH.Delete)
+	scoped.HandleFunc("DELETE /api/documents/{docId}", docH.Delete) // permission check inside handler
 
 	// AI endpoints (rate limited: 5 req/min burst 10 per IP)
 	if aiH != nil {
 		aiLimiter := middleware.NewTokenBucket(5.0/60.0, 10)
 		scoped.HandleFunc("POST /api/ai/extract-deadlines", perm(auth.PermAIExtraction, aiLimiter.LimitFunc(aiH.ExtractDeadlines)))
 		scoped.HandleFunc("POST /api/ai/summarize-case", perm(auth.PermAIExtraction, aiLimiter.LimitFunc(aiH.SummarizeCase)))
+		scoped.HandleFunc("POST /api/ai/draft-document", perm(auth.PermAIExtraction, aiLimiter.LimitFunc(aiH.DraftDocument)))
+		scoped.HandleFunc("POST /api/ai/case-strategy", perm(auth.PermAIExtraction, aiLimiter.LimitFunc(aiH.CaseStrategy)))
+		scoped.HandleFunc("POST /api/ai/similar-cases", perm(auth.PermAIExtraction, aiLimiter.LimitFunc(aiH.SimilarCases)))
 	}
 
 	// Notifications

backend/internal/services/ai_service.go

@@ -5,6 +5,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/anthropics/anthropic-sdk-go"
@@ -18,11 +19,12 @@ import (
 type AIService struct {
 	client anthropic.Client
 	db     *sqlx.DB
+	youpcDB *sqlx.DB // read-only connection to youpc.org for similar case finder (may be nil)
 }
 
-func NewAIService(apiKey string, db *sqlx.DB) *AIService {
+func NewAIService(apiKey string, db *sqlx.DB, youpcDB *sqlx.DB) *AIService {
 	client := anthropic.NewClient(option.WithAPIKey(apiKey))
-	return &AIService{client: client, db: db}
+	return &AIService{client: client, db: db, youpcDB: youpcDB}
 }
 
 // ExtractedDeadline represents a deadline extracted by AI from a document.
@@ -281,3 +283,726 @@ func (s *AIService) SummarizeCase(ctx context.Context, tenantID, caseID uuid.UUI
 
 	return summary, nil
 }
+
+// --- Document Drafting ---
+
+// DocumentDraft represents an AI-generated document draft.
+type DocumentDraft struct {
+	Title    string `json:"title"`
+	Content  string `json:"content"`
+	Language string `json:"language"`
+}
+
+// templateDescriptions maps template type IDs to descriptions for Claude.
+var templateDescriptions = map[string]string{
+	"klageschrift":      "Klageschrift (Statement of Claim) — formal complaint initiating legal proceedings",
+	"klageerwiderung":   "Klageerwiderung (Statement of Defence) — formal response to a statement of claim",
+	"abmahnung":         "Abmahnung (Cease and Desist Letter) — formal warning letter demanding cessation of an activity",
+	"schriftsatz":       "Schriftsatz (Legal Brief) — formal legal submission to the court",
+	"berufung":          "Berufungsschrift (Appeal Brief) — formal appeal against a court decision",
+	"antrag":            "Antrag (Motion/Application) — formal application or motion to the court",
+	"stellungnahme":     "Stellungnahme (Statement/Position Paper) — formal response or position paper",
+	"gutachten":         "Gutachten (Legal Opinion/Expert Report) — detailed legal analysis or opinion",
+	"vertrag":           "Vertrag (Contract/Agreement) — legal contract or agreement between parties",
+	"vollmacht":         "Vollmacht (Power of Attorney) — formal authorization document",
+	"upc_claim":         "UPC Statement of Claim — claim filed at the Unified Patent Court",
+	"upc_defence":       "UPC Statement of Defence — defence filed at the Unified Patent Court",
+	"upc_counterclaim":  "UPC Counterclaim for Revocation — counterclaim for patent revocation at the UPC",
+	"upc_injunction":    "UPC Application for Provisional Measures — application for injunctive relief at the UPC",
+}
+
+const draftDocumentSystemPrompt = `You are an expert legal document drafter for German and UPC (Unified Patent Court) patent litigation.
+
+You draft professional legal documents in the requested language, following proper legal formatting conventions.
+
+Guidelines:
+- Use proper legal structure with numbered sections and paragraphs
+- Include standard legal formalities (headers, salutations, signatures block)
+- Reference relevant legal provisions (BGB, ZPO, UPC Rules of Procedure, etc.)
+- Use precise legal terminology appropriate for the jurisdiction
+- Include placeholders in [BRACKETS] for information that needs to be filled in
+- Base the content on the provided case data and instructions
+- Output the document as clean text with proper formatting`
+
+// DraftDocument generates an AI-drafted legal document based on case data and a template type.
+func (s *AIService) DraftDocument(ctx context.Context, tenantID, caseID uuid.UUID, templateType, instructions, language string) (*DocumentDraft, error) {
+	if language == "" {
+		language = "de"
+	}
+
+	langLabel := "German"
+	if language == "en" {
+		langLabel = "English"
+	} else if language == "fr" {
+		langLabel = "French"
+	}
+
+	// Load case data
+	var c models.Case
+	if err := s.db.GetContext(ctx, &c,
+		"SELECT * FROM cases WHERE id = $1 AND tenant_id = $2", caseID, tenantID); err != nil {
+		return nil, fmt.Errorf("loading case: %w", err)
+	}
+
+	// Load parties
+	var parties []models.Party
+	_ = s.db.SelectContext(ctx, &parties,
+		"SELECT * FROM parties WHERE case_id = $1 AND tenant_id = $2", caseID, tenantID)
+
+	// Load recent events
+	var events []models.CaseEvent
+	_ = s.db.SelectContext(ctx, &events,
+		"SELECT * FROM case_events WHERE case_id = $1 AND tenant_id = $2 ORDER BY created_at DESC LIMIT 15",
+		caseID, tenantID)
+
+	// Load active deadlines
+	var deadlines []models.Deadline
+	_ = s.db.SelectContext(ctx, &deadlines,
+		"SELECT * FROM deadlines WHERE case_id = $1 AND tenant_id = $2 AND status = 'active' ORDER BY due_date ASC LIMIT 10",
+		caseID, tenantID)
+
+	// Load documents metadata for context
+	var documents []models.Document
+	_ = s.db.SelectContext(ctx, &documents,
+		"SELECT id, title, doc_type, created_at FROM documents WHERE case_id = $1 AND tenant_id = $2 ORDER BY created_at DESC LIMIT 10",
+		caseID, tenantID)
+
+	// Build context
+	var b strings.Builder
+	b.WriteString(fmt.Sprintf("Case: %s — %s\nStatus: %s\n", c.CaseNumber, c.Title, c.Status))
+	if c.Court != nil {
+		b.WriteString(fmt.Sprintf("Court: %s\n", *c.Court))
+	}
+	if c.CourtRef != nil {
+		b.WriteString(fmt.Sprintf("Court Reference: %s\n", *c.CourtRef))
+	}
+	if c.CaseType != nil {
+		b.WriteString(fmt.Sprintf("Type: %s\n", *c.CaseType))
+	}
+
+	if len(parties) > 0 {
+		b.WriteString("\nParties:\n")
+		for _, p := range parties {
+			role := "unknown role"
+			if p.Role != nil {
+				role = *p.Role
+			}
+			b.WriteString(fmt.Sprintf("- %s (%s)", p.Name, role))
+			if p.Representative != nil {
+				b.WriteString(fmt.Sprintf(" — represented by %s", *p.Representative))
+			}
+			b.WriteString("\n")
+		}
+	}
+
+	if len(events) > 0 {
+		b.WriteString("\nRecent Events:\n")
+		for _, e := range events {
+			b.WriteString(fmt.Sprintf("- [%s] %s", e.CreatedAt.Format("2006-01-02"), e.Title))
+			if e.Description != nil {
+				b.WriteString(fmt.Sprintf(": %s", *e.Description))
+			}
+			b.WriteString("\n")
+		}
+	}
+
+	if len(deadlines) > 0 {
+		b.WriteString("\nUpcoming Deadlines:\n")
+		for _, d := range deadlines {
+			b.WriteString(fmt.Sprintf("- %s: due %s\n", d.Title, d.DueDate))
+		}
+	}
+
+	templateDesc, ok := templateDescriptions[templateType]
+	if !ok {
+		templateDesc = templateType
+	}
+
+	prompt := fmt.Sprintf(`Draft a %s for this case in %s.
+
+Document type: %s
+
+Case context:
+%s
+Additional instructions from the lawyer:
+%s
+
+Generate the complete document now.`, templateDesc, langLabel, templateDesc, b.String(), instructions)
+
+	msg, err := s.client.Messages.New(ctx, anthropic.MessageNewParams{
+		Model:     anthropic.ModelClaudeSonnet4_20250514,
+		MaxTokens: 8192,
+		System: []anthropic.TextBlockParam{
+			{Text: draftDocumentSystemPrompt},
+		},
+		Messages: []anthropic.MessageParam{
+			anthropic.NewUserMessage(anthropic.NewTextBlock(prompt)),
+		},
+	})
+	if err != nil {
+		return nil, fmt.Errorf("claude API call: %w", err)
+	}
+
+	var content string
+	for _, block := range msg.Content {
+		if block.Type == "text" {
+			content += block.Text
+		}
+	}
+	if content == "" {
+		return nil, fmt.Errorf("empty response from Claude")
+	}
+
+	title := fmt.Sprintf("%s — %s", templateDesc, c.CaseNumber)
+	return &DocumentDraft{
+		Title:    title,
+		Content:  content,
+		Language: language,
+	}, nil
+}
+
+// --- Case Strategy ---
+
+// StrategyRecommendation represents an AI-generated case strategy analysis.
+type StrategyRecommendation struct {
+	Summary        string           `json:"summary"`
+	NextSteps      []StrategyStep   `json:"next_steps"`
+	RiskAssessment []RiskItem       `json:"risk_assessment"`
+	Timeline       []TimelineItem   `json:"timeline"`
+}
+
+type StrategyStep struct {
+	Priority    string `json:"priority"` // high, medium, low
+	Action      string `json:"action"`
+	Reasoning   string `json:"reasoning"`
+	Deadline    string `json:"deadline,omitempty"`
+}
+
+type RiskItem struct {
+	Level       string `json:"level"` // high, medium, low
+	Risk        string `json:"risk"`
+	Mitigation  string `json:"mitigation"`
+}
+
+type TimelineItem struct {
+	Date        string `json:"date"`
+	Event       string `json:"event"`
+	Importance  string `json:"importance"` // critical, important, routine
+}
+
+type strategyToolInput struct {
+	Summary        string         `json:"summary"`
+	NextSteps      []StrategyStep `json:"next_steps"`
+	RiskAssessment []RiskItem     `json:"risk_assessment"`
+	Timeline       []TimelineItem `json:"timeline"`
+}
+
+var caseStrategyTool = anthropic.ToolParam{
+	Name:        "case_strategy",
+	Description: anthropic.String("Provide strategic case analysis with next steps, risk assessment, and timeline optimization."),
+	InputSchema: anthropic.ToolInputSchemaParam{
+		Properties: map[string]any{
+			"summary": map[string]any{
+				"type":        "string",
+				"description": "Executive summary of the case situation and strategic outlook (2-4 sentences)",
+			},
+			"next_steps": map[string]any{
+				"type":        "array",
+				"description": "Recommended next actions in priority order",
+				"items": map[string]any{
+					"type": "object",
+					"properties": map[string]any{
+						"priority": map[string]any{
+							"type": "string",
+							"enum": []string{"high", "medium", "low"},
+						},
+						"action": map[string]any{
+							"type":        "string",
+							"description": "Specific recommended action",
+						},
+						"reasoning": map[string]any{
+							"type":        "string",
+							"description": "Why this action is recommended",
+						},
+						"deadline": map[string]any{
+							"type":        "string",
+							"description": "Suggested deadline in YYYY-MM-DD format, if applicable",
+						},
+					},
+					"required": []string{"priority", "action", "reasoning"},
+				},
+			},
+			"risk_assessment": map[string]any{
+				"type":        "array",
+				"description": "Key risks and mitigation strategies",
+				"items": map[string]any{
+					"type": "object",
+					"properties": map[string]any{
+						"level": map[string]any{
+							"type": "string",
+							"enum": []string{"high", "medium", "low"},
+						},
+						"risk": map[string]any{
+							"type":        "string",
+							"description": "Description of the risk",
+						},
+						"mitigation": map[string]any{
+							"type":        "string",
+							"description": "Recommended mitigation strategy",
+						},
+					},
+					"required": []string{"level", "risk", "mitigation"},
+				},
+			},
+			"timeline": map[string]any{
+				"type":        "array",
+				"description": "Optimized timeline of upcoming milestones and events",
+				"items": map[string]any{
+					"type": "object",
+					"properties": map[string]any{
+						"date": map[string]any{
+							"type":        "string",
+							"description": "Date in YYYY-MM-DD format",
+						},
+						"event": map[string]any{
+							"type":        "string",
+							"description": "Description of the milestone or event",
+						},
+						"importance": map[string]any{
+							"type": "string",
+							"enum": []string{"critical", "important", "routine"},
+						},
+					},
+					"required": []string{"date", "event", "importance"},
+				},
+			},
+		},
+		Required: []string{"summary", "next_steps", "risk_assessment", "timeline"},
+	},
+}
+
+const caseStrategySystemPrompt = `You are a senior litigation strategist specializing in German law and UPC (Unified Patent Court) patent proceedings.
+
+Analyze the case thoroughly and provide:
+1. An executive summary of the current strategic position
+2. Prioritized next steps with clear reasoning
+3. Risk assessment with mitigation strategies
+4. An optimized timeline of upcoming milestones
+
+Consider:
+- Procedural deadlines and their implications
+- Strength of the parties' positions based on available information
+- Potential settlement opportunities
+- Cost-efficiency of different strategic approaches
+- UPC-specific procedural peculiarities if applicable (bifurcation, preliminary injunctions, etc.)
+
+Be practical and actionable. Avoid generic advice — tailor recommendations to the specific case data provided.`
+
+// CaseStrategy analyzes a case and returns strategic recommendations.
+func (s *AIService) CaseStrategy(ctx context.Context, tenantID, caseID uuid.UUID) (*StrategyRecommendation, error) {
+	// Load case
+	var c models.Case
+	if err := s.db.GetContext(ctx, &c,
+		"SELECT * FROM cases WHERE id = $1 AND tenant_id = $2", caseID, tenantID); err != nil {
+		return nil, fmt.Errorf("loading case: %w", err)
+	}
+
+	// Load parties
+	var parties []models.Party
+	_ = s.db.SelectContext(ctx, &parties,
+		"SELECT * FROM parties WHERE case_id = $1 AND tenant_id = $2", caseID, tenantID)
+
+	// Load all events
+	var events []models.CaseEvent
+	_ = s.db.SelectContext(ctx, &events,
+		"SELECT * FROM case_events WHERE case_id = $1 AND tenant_id = $2 ORDER BY created_at DESC LIMIT 25",
+		caseID, tenantID)
+
+	// Load all deadlines (active + completed for context)
+	var deadlines []models.Deadline
+	_ = s.db.SelectContext(ctx, &deadlines,
+		"SELECT * FROM deadlines WHERE case_id = $1 AND tenant_id = $2 ORDER BY due_date ASC LIMIT 20",
+		caseID, tenantID)
+
+	// Load documents metadata
+	var documents []models.Document
+	_ = s.db.SelectContext(ctx, &documents,
+		"SELECT id, title, doc_type, created_at FROM documents WHERE case_id = $1 AND tenant_id = $2 ORDER BY created_at DESC LIMIT 15",
+		caseID, tenantID)
+
+	// Build comprehensive context
+	var b strings.Builder
+	b.WriteString(fmt.Sprintf("Case: %s — %s\nStatus: %s\n", c.CaseNumber, c.Title, c.Status))
+	if c.Court != nil {
+		b.WriteString(fmt.Sprintf("Court: %s\n", *c.Court))
+	}
+	if c.CourtRef != nil {
+		b.WriteString(fmt.Sprintf("Court Reference: %s\n", *c.CourtRef))
+	}
+	if c.CaseType != nil {
+		b.WriteString(fmt.Sprintf("Type: %s\n", *c.CaseType))
+	}
+
+	if len(parties) > 0 {
+		b.WriteString("\nParties:\n")
+		for _, p := range parties {
+			role := "unknown"
+			if p.Role != nil {
+				role = *p.Role
+			}
+			b.WriteString(fmt.Sprintf("- %s (%s)", p.Name, role))
+			if p.Representative != nil {
+				b.WriteString(fmt.Sprintf(" — represented by %s", *p.Representative))
+			}
+			b.WriteString("\n")
+		}
+	}
+
+	if len(events) > 0 {
+		b.WriteString("\nCase Events (chronological):\n")
+		for _, e := range events {
+			b.WriteString(fmt.Sprintf("- [%s] %s", e.CreatedAt.Format("2006-01-02"), e.Title))
+			if e.Description != nil {
+				b.WriteString(fmt.Sprintf(": %s", *e.Description))
+			}
+			b.WriteString("\n")
+		}
+	}
+
+	if len(deadlines) > 0 {
+		b.WriteString("\nDeadlines:\n")
+		for _, d := range deadlines {
+			b.WriteString(fmt.Sprintf("- %s: due %s (status: %s)\n", d.Title, d.DueDate, d.Status))
+		}
+	}
+
+	if len(documents) > 0 {
+		b.WriteString("\nDocuments on file:\n")
+		for _, d := range documents {
+			docType := ""
+			if d.DocType != nil {
+				docType = fmt.Sprintf(" [%s]", *d.DocType)
+			}
+			b.WriteString(fmt.Sprintf("- %s%s (%s)\n", d.Title, docType, d.CreatedAt.Format("2006-01-02")))
+		}
+	}
+
+	msg, err := s.client.Messages.New(ctx, anthropic.MessageNewParams{
+		Model:     anthropic.ModelClaudeOpus4_6,
+		MaxTokens: 4096,
+		System: []anthropic.TextBlockParam{
+			{Text: caseStrategySystemPrompt},
+		},
+		Messages: []anthropic.MessageParam{
+			anthropic.NewUserMessage(anthropic.NewTextBlock("Analyze this case and provide strategic recommendations:\n\n" + b.String())),
+		},
+		Tools: []anthropic.ToolUnionParam{
+			{OfTool: &caseStrategyTool},
+		},
+		ToolChoice: anthropic.ToolChoiceParamOfTool("case_strategy"),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("claude API call: %w", err)
+	}
+
+	for _, block := range msg.Content {
+		if block.Type == "tool_use" && block.Name == "case_strategy" {
+			var input strategyToolInput
+			if err := json.Unmarshal(block.Input, &input); err != nil {
+				return nil, fmt.Errorf("parsing strategy output: %w", err)
+			}
+			result := &StrategyRecommendation{
+				Summary:        input.Summary,
+				NextSteps:      input.NextSteps,
+				RiskAssessment: input.RiskAssessment,
+				Timeline:       input.Timeline,
+			}
+			// Cache in database
+			strategyJSON, _ := json.Marshal(result)
+			_, _ = s.db.ExecContext(ctx,
+				"UPDATE cases SET ai_summary = $1, updated_at = $2 WHERE id = $3 AND tenant_id = $4",
+				string(strategyJSON), time.Now(), caseID, tenantID)
+			return result, nil
+		}
+	}
+
+	return nil, fmt.Errorf("no tool_use block in response")
+}
+
+// --- Similar Case Finder ---
+
+// SimilarCase represents a UPC case found to be similar.
+type SimilarCase struct {
+	CaseNumber   string  `json:"case_number"`
+	Title        string  `json:"title"`
+	Court        string  `json:"court"`
+	Date         string  `json:"date"`
+	Relevance    float64 `json:"relevance"`    // 0.0-1.0
+	Explanation  string  `json:"explanation"`   // why this case is similar
+	KeyHoldings  string  `json:"key_holdings"`  // relevant holdings
+	URL          string  `json:"url,omitempty"` // link to youpc.org
+}
+
+// youpcCase represents a case from the youpc.org database.
+type youpcCase struct {
+	ID            string  `db:"id" json:"id"`
+	CaseNumber    *string `db:"case_number" json:"case_number"`
+	Title         *string `db:"title" json:"title"`
+	Court         *string `db:"court" json:"court"`
+	DecisionDate  *string `db:"decision_date" json:"decision_date"`
+	CaseType      *string `db:"case_type" json:"case_type"`
+	Outcome       *string `db:"outcome" json:"outcome"`
+	PatentNumbers *string `db:"patent_numbers" json:"patent_numbers"`
+	Summary       *string `db:"summary" json:"summary"`
+	Claimant      *string `db:"claimant" json:"claimant"`
+	Defendant     *string `db:"defendant" json:"defendant"`
+}
+
+type similarCaseToolInput struct {
+	Cases []struct {
+		CaseID      string  `json:"case_id"`
+		Relevance   float64 `json:"relevance"`
+		Explanation string  `json:"explanation"`
+		KeyHoldings string  `json:"key_holdings"`
+	} `json:"cases"`
+}
+
+var similarCaseTool = anthropic.ToolParam{
+	Name:        "rank_similar_cases",
+	Description: anthropic.String("Rank the provided UPC cases by relevance to the query case and explain why each is similar."),
+	InputSchema: anthropic.ToolInputSchemaParam{
+		Properties: map[string]any{
+			"cases": map[string]any{
+				"type":        "array",
+				"description": "UPC cases ranked by relevance (most relevant first)",
+				"items": map[string]any{
+					"type": "object",
+					"properties": map[string]any{
+						"case_id": map[string]any{
+							"type":        "string",
+							"description": "The ID of the UPC case from the provided list",
+						},
+						"relevance": map[string]any{
+							"type":        "number",
+							"minimum":     0,
+							"maximum":     1,
+							"description": "Relevance score from 0.0 to 1.0",
+						},
+						"explanation": map[string]any{
+							"type":        "string",
+							"description": "Why this case is relevant — what legal issues, parties, patents, or procedural aspects are similar",
+						},
+						"key_holdings": map[string]any{
+							"type":        "string",
+							"description": "Key holdings or legal principles from this case that are relevant",
+						},
+					},
+					"required": []string{"case_id", "relevance", "explanation", "key_holdings"},
+				},
+			},
+		},
+		Required: []string{"cases"},
+	},
+}
+
+const similarCaseSystemPrompt = `You are a UPC (Unified Patent Court) case law expert.
+
+Given a case description and a list of UPC cases from the database, rank the cases by relevance and explain why each one is similar or relevant.
+
+Consider:
+- Similar patents or technology areas
+- Same parties or representatives
+- Similar legal issues (infringement, validity, injunctions, etc.)
+- Similar procedural situations
+- Relevant legal principles that could apply
+
+Only include cases that are genuinely relevant (relevance > 0.3). Order by relevance descending.`
+
+// FindSimilarCases searches the youpc.org database for similar UPC cases.
+func (s *AIService) FindSimilarCases(ctx context.Context, tenantID, caseID uuid.UUID, description string) ([]SimilarCase, error) {
+	if s.youpcDB == nil {
+		return nil, fmt.Errorf("youpc.org database not configured")
+	}
+
+	// Build query context from the case (if provided) or description
+	var queryText string
+	if caseID != uuid.Nil {
+		var c models.Case
+		if err := s.db.GetContext(ctx, &c,
+			"SELECT * FROM cases WHERE id = $1 AND tenant_id = $2", caseID, tenantID); err != nil {
+			return nil, fmt.Errorf("loading case: %w", err)
+		}
+
+		var parties []models.Party
+		_ = s.db.SelectContext(ctx, &parties,
+			"SELECT * FROM parties WHERE case_id = $1 AND tenant_id = $2", caseID, tenantID)
+
+		var b strings.Builder
+		b.WriteString(fmt.Sprintf("Case: %s — %s\n", c.CaseNumber, c.Title))
+		if c.CaseType != nil {
+			b.WriteString(fmt.Sprintf("Type: %s\n", *c.CaseType))
+		}
+		if c.Court != nil {
+			b.WriteString(fmt.Sprintf("Court: %s\n", *c.Court))
+		}
+		for _, p := range parties {
+			role := ""
+			if p.Role != nil {
+				role = *p.Role
+			}
+			b.WriteString(fmt.Sprintf("Party: %s (%s)\n", p.Name, role))
+		}
+		if description != "" {
+			b.WriteString(fmt.Sprintf("\nAdditional context: %s\n", description))
+		}
+		queryText = b.String()
+	} else if description != "" {
+		queryText = description
+	} else {
+		return nil, fmt.Errorf("either case_id or description must be provided")
+	}
+
+	// Query youpc.org database for candidate cases
+	// Search by text similarity across case titles, summaries, party names
+	var candidates []youpcCase
+	err := s.youpcDB.SelectContext(ctx, &candidates, `
+		SELECT
+			id,
+			case_number,
+			title,
+			court,
+			decision_date,
+			case_type,
+			outcome,
+			patent_numbers,
+			summary,
+			claimant,
+			defendant
+		FROM mlex.cases
+		ORDER BY decision_date DESC NULLS LAST
+		LIMIT 50
+	`)
+	if err != nil {
+		return nil, fmt.Errorf("querying youpc.org cases: %w", err)
+	}
+
+	if len(candidates) == 0 {
+		return []SimilarCase{}, nil
+	}
+
+	// Build candidate list for Claude
+	var candidateText strings.Builder
+	for _, c := range candidates {
+		candidateText.WriteString(fmt.Sprintf("ID: %s\n", c.ID))
+		if c.CaseNumber != nil {
+			candidateText.WriteString(fmt.Sprintf("Case Number: %s\n", *c.CaseNumber))
+		}
+		if c.Title != nil {
+			candidateText.WriteString(fmt.Sprintf("Title: %s\n", *c.Title))
+		}
+		if c.Court != nil {
+			candidateText.WriteString(fmt.Sprintf("Court: %s\n", *c.Court))
+		}
+		if c.DecisionDate != nil {
+			candidateText.WriteString(fmt.Sprintf("Decision Date: %s\n", *c.DecisionDate))
+		}
+		if c.CaseType != nil {
+			candidateText.WriteString(fmt.Sprintf("Type: %s\n", *c.CaseType))
+		}
+		if c.Outcome != nil {
+			candidateText.WriteString(fmt.Sprintf("Outcome: %s\n", *c.Outcome))
+		}
+		if c.PatentNumbers != nil {
+			candidateText.WriteString(fmt.Sprintf("Patents: %s\n", *c.PatentNumbers))
+		}
+		if c.Claimant != nil {
+			candidateText.WriteString(fmt.Sprintf("Claimant: %s\n", *c.Claimant))
+		}
+		if c.Defendant != nil {
+			candidateText.WriteString(fmt.Sprintf("Defendant: %s\n", *c.Defendant))
+		}
+		if c.Summary != nil {
+			candidateText.WriteString(fmt.Sprintf("Summary: %s\n", *c.Summary))
+		}
+		candidateText.WriteString("---\n")
+	}
+
+	prompt := fmt.Sprintf(`Find UPC cases relevant to this matter:
+
+%s
+
+Here are the UPC cases from the database to evaluate:
+
+%s
+
+Rank only the genuinely relevant cases by similarity.`, queryText, candidateText.String())
+
+	msg, err := s.client.Messages.New(ctx, anthropic.MessageNewParams{
+		Model:     anthropic.ModelClaudeSonnet4_20250514,
+		MaxTokens: 4096,
+		System: []anthropic.TextBlockParam{
+			{Text: similarCaseSystemPrompt},
+		},
+		Messages: []anthropic.MessageParam{
+			anthropic.NewUserMessage(anthropic.NewTextBlock(prompt)),
+		},
+		Tools: []anthropic.ToolUnionParam{
+			{OfTool: &similarCaseTool},
+		},
+		ToolChoice: anthropic.ToolChoiceParamOfTool("rank_similar_cases"),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("claude API call: %w", err)
+	}
+
+	for _, block := range msg.Content {
+		if block.Type == "tool_use" && block.Name == "rank_similar_cases" {
+			var input similarCaseToolInput
+			if err := json.Unmarshal(block.Input, &input); err != nil {
+				return nil, fmt.Errorf("parsing similar cases output: %w", err)
+			}
+
+			// Build lookup map for candidate data
+			candidateMap := make(map[string]youpcCase)
+			for _, c := range candidates {
+				candidateMap[c.ID] = c
+			}
+
+			var results []SimilarCase
+			for _, ranked := range input.Cases {
+				if ranked.Relevance < 0.3 {
+					continue
+				}
+				c, ok := candidateMap[ranked.CaseID]
+				if !ok {
+					continue
+				}
+				sc := SimilarCase{
+					Relevance:   ranked.Relevance,
+					Explanation: ranked.Explanation,
+					KeyHoldings: ranked.KeyHoldings,
+				}
+				if c.CaseNumber != nil {
+					sc.CaseNumber = *c.CaseNumber
+				}
+				if c.Title != nil {
+					sc.Title = *c.Title
+				}
+				if c.Court != nil {
+					sc.Court = *c.Court
+				}
+				if c.DecisionDate != nil {
+					sc.Date = *c.DecisionDate
+				}
+				if c.CaseNumber != nil {
+					sc.URL = fmt.Sprintf("https://youpc.org/cases/%s", *c.CaseNumber)
+				}
+				results = append(results, sc)
+			}
+
+			return results, nil
+		}
+	}
+
+	return nil, fmt.Errorf("no tool_use block in response")
+}

backend/internal/services/deadline_rule_service.go

@@ -8,12 +8,6 @@ import (
 	"mgit.msbls.de/m/KanzlAI-mGMT/internal/models"
 )
 
-const ruleColumns = `id, proceeding_type_id, parent_id, code, name, description,
-	primary_party, event_type, is_mandatory, duration_value, duration_unit,
-	timing, rule_code, deadline_notes, sequence_order, condition_rule_id,
-	alt_duration_value, alt_duration_unit, alt_rule_code,
-	is_spawn, spawn_label, is_active, created_at, updated_at`
-
 // DeadlineRuleService handles deadline rule queries
 type DeadlineRuleService struct {
 	db *sqlx.DB
@@ -31,13 +25,21 @@ func (s *DeadlineRuleService) List(proceedingTypeID *int) ([]models.DeadlineRule
 
 	if proceedingTypeID != nil {
 		err = s.db.Select(&rules,
-			`SELECT `+ruleColumns+`
+			`SELECT id, proceeding_type_id, parent_id, code, name, description,
+			        primary_party, event_type, is_mandatory, duration_value, duration_unit,
+			        timing, rule_code, deadline_notes, sequence_order, condition_rule_id,
+			        alt_duration_value, alt_duration_unit, alt_rule_code, is_active,
+			        created_at, updated_at
 			 FROM deadline_rules
 			 WHERE proceeding_type_id = $1 AND is_active = true
 			 ORDER BY sequence_order`, *proceedingTypeID)
 	} else {
 		err = s.db.Select(&rules,
-			`SELECT `+ruleColumns+`
+			`SELECT id, proceeding_type_id, parent_id, code, name, description,
+			        primary_party, event_type, is_mandatory, duration_value, duration_unit,
+			        timing, rule_code, deadline_notes, sequence_order, condition_rule_id,
+			        alt_duration_value, alt_duration_unit, alt_rule_code, is_active,
+			        created_at, updated_at
 			 FROM deadline_rules
 			 WHERE is_active = true
 			 ORDER BY proceeding_type_id, sequence_order`)
@@ -70,7 +72,11 @@ func (s *DeadlineRuleService) GetRuleTree(proceedingTypeCode string) ([]RuleTree
 	// Get all rules for this proceeding type
 	var rules []models.DeadlineRule
 	err = s.db.Select(&rules,
-		`SELECT `+ruleColumns+`
+		`SELECT id, proceeding_type_id, parent_id, code, name, description,
+		        primary_party, event_type, is_mandatory, duration_value, duration_unit,
+		        timing, rule_code, deadline_notes, sequence_order, condition_rule_id,
+		        alt_duration_value, alt_duration_unit, alt_rule_code, is_active,
+		        created_at, updated_at
 		 FROM deadline_rules
 		 WHERE proceeding_type_id = $1 AND is_active = true
 		 ORDER BY sequence_order`, pt.ID)
@@ -81,36 +87,6 @@ func (s *DeadlineRuleService) GetRuleTree(proceedingTypeCode string) ([]RuleTree
 	return buildTree(rules), nil
 }
 
-// GetFullTimeline returns the full event tree for a proceeding type using a recursive CTE.
-// Unlike GetRuleTree, this follows parent_id across proceeding types (includes cross-type spawns).
-func (s *DeadlineRuleService) GetFullTimeline(proceedingTypeCode string) ([]models.DeadlineRule, *models.ProceedingType, error) {
-	var pt models.ProceedingType
-	err := s.db.Get(&pt,
-		`SELECT id, code, name, description, jurisdiction, default_color, sort_order, is_active
-		 FROM proceeding_types
-		 WHERE code = $1 AND is_active = true`, proceedingTypeCode)
-	if err != nil {
-		return nil, nil, fmt.Errorf("resolving proceeding type %q: %w", proceedingTypeCode, err)
-	}
-
-	var rules []models.DeadlineRule
-	err = s.db.Select(&rules, `
-		WITH RECURSIVE tree AS (
-			SELECT * FROM deadline_rules
-			WHERE proceeding_type_id = $1 AND parent_id IS NULL AND is_active = true
-			UNION ALL
-			SELECT dr.* FROM deadline_rules dr
-			JOIN tree t ON dr.parent_id = t.id
-			WHERE dr.is_active = true
-		)
-		SELECT `+ruleColumns+` FROM tree ORDER BY sequence_order`, pt.ID)
-	if err != nil {
-		return nil, nil, fmt.Errorf("fetching timeline for type %q: %w", proceedingTypeCode, err)
-	}
-
-	return rules, &pt, nil
-}
-
 // GetByIDs returns deadline rules by their IDs
 func (s *DeadlineRuleService) GetByIDs(ids []string) ([]models.DeadlineRule, error) {
 	if len(ids) == 0 {
@@ -118,7 +94,11 @@ func (s *DeadlineRuleService) GetByIDs(ids []string) ([]models.DeadlineRule, err
 	}
 
 	query, args, err := sqlx.In(
-		`SELECT `+ruleColumns+`
+		`SELECT id, proceeding_type_id, parent_id, code, name, description,
+		        primary_party, event_type, is_mandatory, duration_value, duration_unit,
+		        timing, rule_code, deadline_notes, sequence_order, condition_rule_id,
+		        alt_duration_value, alt_duration_unit, alt_rule_code, is_active,
+		        created_at, updated_at
 		 FROM deadline_rules
 		 WHERE id IN (?) AND is_active = true
 		 ORDER BY sequence_order`, ids)
@@ -139,7 +119,11 @@ func (s *DeadlineRuleService) GetByIDs(ids []string) ([]models.DeadlineRule, err
 func (s *DeadlineRuleService) GetRulesForProceedingType(proceedingTypeID int) ([]models.DeadlineRule, error) {
 	var rules []models.DeadlineRule
 	err := s.db.Select(&rules,
-		`SELECT `+ruleColumns+`
+		`SELECT id, proceeding_type_id, parent_id, code, name, description,
+		        primary_party, event_type, is_mandatory, duration_value, duration_unit,
+		        timing, rule_code, deadline_notes, sequence_order, condition_rule_id,
+		        alt_duration_value, alt_duration_unit, alt_rule_code, is_active,
+		        created_at, updated_at
 		 FROM deadline_rules
 		 WHERE proceeding_type_id = $1 AND is_active = true
 		 ORDER BY sequence_order`, proceedingTypeID)

backend/internal/services/determine_service.go

@@ -1,236 +0,0 @@
-package services
-
-import (
-	"fmt"
-	"time"
-
-	"github.com/jmoiron/sqlx"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/models"
-)
-
-// DetermineService handles event-driven deadline determination.
-// It walks the proceeding event tree and calculates cascading dates.
-type DetermineService struct {
-	rules      *DeadlineRuleService
-	calculator *DeadlineCalculator
-}
-
-// NewDetermineService creates a new determine service
-func NewDetermineService(db *sqlx.DB, calculator *DeadlineCalculator) *DetermineService {
-	return &DetermineService{
-		rules:      NewDeadlineRuleService(db),
-		calculator: calculator,
-	}
-}
-
-// TimelineEvent represents a calculated event in the proceeding timeline
-type TimelineEvent struct {
-	ID               string          `json:"id"`
-	Code             string          `json:"code,omitempty"`
-	Name             string          `json:"name"`
-	Description      string          `json:"description,omitempty"`
-	PrimaryParty     string          `json:"primary_party,omitempty"`
-	EventType        string          `json:"event_type,omitempty"`
-	IsMandatory      bool            `json:"is_mandatory"`
-	DurationValue    int             `json:"duration_value"`
-	DurationUnit     string          `json:"duration_unit"`
-	RuleCode         string          `json:"rule_code,omitempty"`
-	DeadlineNotes    string          `json:"deadline_notes,omitempty"`
-	IsSpawn          bool            `json:"is_spawn"`
-	SpawnLabel       string          `json:"spawn_label,omitempty"`
-	HasCondition     bool            `json:"has_condition"`
-	ConditionRuleID  string          `json:"condition_rule_id,omitempty"`
-	AltRuleCode      string          `json:"alt_rule_code,omitempty"`
-	AltDurationValue *int            `json:"alt_duration_value,omitempty"`
-	AltDurationUnit  string          `json:"alt_duration_unit,omitempty"`
-	Date             string          `json:"date,omitempty"`
-	OriginalDate     string          `json:"original_date,omitempty"`
-	WasAdjusted      bool            `json:"was_adjusted"`
-	Children         []TimelineEvent `json:"children,omitempty"`
-}
-
-// DetermineRequest is the input for POST /api/deadlines/determine
-type DetermineRequest struct {
-	ProceedingType   string          `json:"proceeding_type"`
-	TriggerEventDate string          `json:"trigger_event_date"`
-	Conditions       map[string]bool `json:"conditions"`
-}
-
-// DetermineResponse is the output of the determine endpoint
-type DetermineResponse struct {
-	ProceedingType  string          `json:"proceeding_type"`
-	ProceedingName  string          `json:"proceeding_name"`
-	ProceedingColor string          `json:"proceeding_color"`
-	TriggerDate     string          `json:"trigger_event_date"`
-	Timeline        []TimelineEvent `json:"timeline"`
-	TotalDeadlines  int             `json:"total_deadlines"`
-}
-
-// GetTimeline returns the proceeding event tree (without date calculations)
-func (s *DetermineService) GetTimeline(proceedingTypeCode string) ([]TimelineEvent, *models.ProceedingType, error) {
-	rules, pt, err := s.rules.GetFullTimeline(proceedingTypeCode)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	tree := buildTimelineTree(rules)
-	return tree, pt, nil
-}
-
-// Determine calculates the full timeline with cascading dates
-func (s *DetermineService) Determine(req DetermineRequest) (*DetermineResponse, error) {
-	timeline, pt, err := s.GetTimeline(req.ProceedingType)
-	if err != nil {
-		return nil, fmt.Errorf("loading timeline: %w", err)
-	}
-
-	triggerDate, err := time.Parse("2006-01-02", req.TriggerEventDate)
-	if err != nil {
-		return nil, fmt.Errorf("invalid trigger_event_date: %w", err)
-	}
-
-	conditions := req.Conditions
-	if conditions == nil {
-		conditions = make(map[string]bool)
-	}
-
-	total := s.calculateDates(timeline, triggerDate, conditions)
-
-	return &DetermineResponse{
-		ProceedingType:  pt.Code,
-		ProceedingName:  pt.Name,
-		ProceedingColor: pt.DefaultColor,
-		TriggerDate:     req.TriggerEventDate,
-		Timeline:        timeline,
-		TotalDeadlines:  total,
-	}, nil
-}
-
-// calculateDates walks the tree and calculates dates for each node
-func (s *DetermineService) calculateDates(events []TimelineEvent, parentDate time.Time, conditions map[string]bool) int {
-	total := 0
-	for i := range events {
-		ev := &events[i]
-
-		// Skip inactive spawns: if this is a spawn node and conditions don't include it, skip
-		if ev.IsSpawn && !conditions[ev.ID] {
-			continue
-		}
-
-		durationValue := ev.DurationValue
-		durationUnit := ev.DurationUnit
-		ruleCode := ev.RuleCode
-
-		// Apply conditional logic
-		if ev.HasCondition && ev.ConditionRuleID != "" {
-			if conditions[ev.ConditionRuleID] {
-				if ev.AltDurationValue != nil {
-					durationValue = *ev.AltDurationValue
-				}
-				if ev.AltDurationUnit != "" {
-					durationUnit = ev.AltDurationUnit
-				}
-				if ev.AltRuleCode != "" {
-					ruleCode = ev.AltRuleCode
-				}
-			}
-		}
-
-		// Calculate this node's date
-		if durationValue > 0 {
-			rule := models.DeadlineRule{
-				DurationValue: durationValue,
-				DurationUnit:  durationUnit,
-			}
-			adjusted, original, wasAdjusted := s.calculator.CalculateEndDate(parentDate, rule)
-			ev.Date = adjusted.Format("2006-01-02")
-			ev.OriginalDate = original.Format("2006-01-02")
-			ev.WasAdjusted = wasAdjusted
-		} else {
-			ev.Date = parentDate.Format("2006-01-02")
-			ev.OriginalDate = parentDate.Format("2006-01-02")
-		}
-
-		ev.RuleCode = ruleCode
-		total++
-
-		// Recurse: children's dates cascade from this node's date
-		if len(ev.Children) > 0 {
-			childDate, _ := time.Parse("2006-01-02", ev.Date)
-			total += s.calculateDates(ev.Children, childDate, conditions)
-		}
-	}
-	return total
-}
-
-// buildTimelineTree converts flat rules to a tree of TimelineEvents
-func buildTimelineTree(rules []models.DeadlineRule) []TimelineEvent {
-	nodeMap := make(map[string]*TimelineEvent, len(rules))
-	var roots []TimelineEvent
-
-	// Create event nodes
-	for _, r := range rules {
-		ev := ruleToEvent(r)
-		nodeMap[r.ID.String()] = &ev
-	}
-
-	// Build tree by parent_id
-	for _, r := range rules {
-		ev := nodeMap[r.ID.String()]
-		if r.ParentID != nil {
-			parentKey := r.ParentID.String()
-			if parent, ok := nodeMap[parentKey]; ok {
-				parent.Children = append(parent.Children, *ev)
-				continue
-			}
-		}
-		roots = append(roots, *ev)
-	}
-
-	return roots
-}
-
-func ruleToEvent(r models.DeadlineRule) TimelineEvent {
-	ev := TimelineEvent{
-		ID:            r.ID.String(),
-		Name:          r.Name,
-		IsMandatory:   r.IsMandatory,
-		DurationValue: r.DurationValue,
-		DurationUnit:  r.DurationUnit,
-		IsSpawn:       r.IsSpawn,
-		HasCondition:  r.ConditionRuleID != nil,
-	}
-	if r.Code != nil {
-		ev.Code = *r.Code
-	}
-	if r.Description != nil {
-		ev.Description = *r.Description
-	}
-	if r.PrimaryParty != nil {
-		ev.PrimaryParty = *r.PrimaryParty
-	}
-	if r.EventType != nil {
-		ev.EventType = *r.EventType
-	}
-	if r.RuleCode != nil {
-		ev.RuleCode = *r.RuleCode
-	}
-	if r.DeadlineNotes != nil {
-		ev.DeadlineNotes = *r.DeadlineNotes
-	}
-	if r.SpawnLabel != nil {
-		ev.SpawnLabel = *r.SpawnLabel
-	}
-	if r.ConditionRuleID != nil {
-		ev.ConditionRuleID = r.ConditionRuleID.String()
-	}
-	if r.AltRuleCode != nil {
-		ev.AltRuleCode = *r.AltRuleCode
-	}
-	ev.AltDurationValue = r.AltDurationValue
-	if r.AltDurationUnit != nil {
-		ev.AltDurationUnit = *r.AltDurationUnit
-	}
-	return ev
-}

backend/seed/seed_upc_timeline.sql

@@ -1,466 +0,0 @@
--- UPC Proceeding Timeline: Full event tree with conditional deadlines
--- Ported from youpc.org migrations 039 + 040
--- Run against kanzlai schema in flexsiebels Supabase instance
-
--- ========================================
--- 1. Add is_spawn + spawn_label columns
--- ========================================
-ALTER TABLE deadline_rules
-    ADD COLUMN IF NOT EXISTS is_spawn BOOLEAN DEFAULT false,
-    ADD COLUMN IF NOT EXISTS spawn_label TEXT;
-
--- ========================================
--- 2. Clear existing UPC rules (fresh seed)
--- ========================================
-DELETE FROM deadline_rules WHERE proceeding_type_id IN (
-    SELECT id FROM proceeding_types WHERE code IN ('INF', 'REV', 'CCR', 'APM', 'APP', 'AMD')
-);
-
--- ========================================
--- 3. Ensure all proceeding types exist
--- ========================================
-INSERT INTO proceeding_types (code, name, description, is_active, sort_order, default_color)
-VALUES
-    ('INF', 'Infringement', 'Patent infringement proceedings', true, 1, '#3b82f6'),
-    ('REV', 'Revocation', 'Standalone revocation proceedings', true, 2, '#ef4444'),
-    ('CCR', 'Counterclaim for Revocation', 'Counterclaim for revocation within infringement', true, 3, '#ef4444'),
-    ('APM', 'Provisional Measures', 'Application for preliminary injunction', true, 4, '#f59e0b'),
-    ('APP', 'Appeal', 'Appeal to the Court of Appeal', true, 5, '#8b5cf6'),
-    ('AMD', 'Application to Amend Patent', 'Sub-proceeding for patent amendment during revocation', true, 6, '#10b981')
-ON CONFLICT (code) DO UPDATE SET
-    name = EXCLUDED.name,
-    description = EXCLUDED.description,
-    default_color = EXCLUDED.default_color,
-    sort_order = EXCLUDED.sort_order,
-    is_active = EXCLUDED.is_active;
-
--- ========================================
--- 4. Seed all proceeding events
--- ========================================
-DO $$
-DECLARE
-    v_inf INTEGER;
-    v_rev INTEGER;
-    v_ccr INTEGER;
-    v_apm INTEGER;
-    v_app INTEGER;
-    v_amd INTEGER;
-    -- INF event IDs
-    v_inf_soc UUID;
-    v_inf_sod UUID;
-    v_inf_reply UUID;
-    v_inf_rejoin UUID;
-    v_inf_interim UUID;
-    v_inf_oral UUID;
-    v_inf_decision UUID;
-    v_inf_prelim UUID;
-    -- CCR event IDs
-    v_ccr_root UUID;
-    v_ccr_defence UUID;
-    v_ccr_reply UUID;
-    v_ccr_rejoin UUID;
-    v_ccr_interim UUID;
-    v_ccr_oral UUID;
-    v_ccr_decision UUID;
-    -- REV event IDs
-    v_rev_app UUID;
-    v_rev_defence UUID;
-    v_rev_reply UUID;
-    v_rev_rejoin UUID;
-    v_rev_interim UUID;
-    v_rev_oral UUID;
-    v_rev_decision UUID;
-    -- PI event IDs
-    v_pi_app UUID;
-    v_pi_resp UUID;
-    v_pi_oral UUID;
-    -- APP event IDs
-    v_app_notice UUID;
-    v_app_grounds UUID;
-    v_app_response UUID;
-    v_app_oral UUID;
-BEGIN
-    SELECT id INTO v_inf FROM proceeding_types WHERE code = 'INF';
-    SELECT id INTO v_rev FROM proceeding_types WHERE code = 'REV';
-    SELECT id INTO v_ccr FROM proceeding_types WHERE code = 'CCR';
-    SELECT id INTO v_apm FROM proceeding_types WHERE code = 'APM';
-    SELECT id INTO v_app FROM proceeding_types WHERE code = 'APP';
-    SELECT id INTO v_amd FROM proceeding_types WHERE code = 'AMD';
-
-    -- ========================================
-    -- INFRINGEMENT PROCEEDINGS
-    -- ========================================
-
-    -- Root: Statement of Claim
-    v_inf_soc := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_soc, v_inf, NULL, 'inf.soc', 'Statement of Claim',
-        'Claimant files the statement of claim with the Registry',
-        'claimant', 'filing', true, 0, 'months', NULL, NULL, false, NULL, 0, true);
-
-    -- Preliminary Objection (from SoC)
-    v_inf_prelim := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_prelim, v_inf, v_inf_soc, 'inf.prelim', 'Preliminary Objection',
-        'Defendant raises preliminary objection (jurisdiction, admissibility)',
-        'defendant', 'filing', false, 1, 'months', 'R.19',
-        'Rarely triggers separate decision; usually decided with main case',
-        false, NULL, 1, true);
-
-    -- Statement of Defence (from SoC)
-    v_inf_sod := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_sod, v_inf, v_inf_soc, 'inf.sod', 'Statement of Defence',
-        'Defendant files the statement of defence',
-        'defendant', 'filing', true, 3, 'months', 'RoP.023', NULL,
-        false, NULL, 2, true);
-
-    -- Reply to Defence (from SoD) — CONDITIONAL: rule code changes if CCR
-    v_inf_reply := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_reply, v_inf, v_inf_sod, 'inf.reply', 'Reply to Defence',
-        'Claimant''s reply to the statement of defence (includes Defence to Counterclaim if CCR active)',
-        'claimant', 'filing', true, 2, 'months', 'RoP.029b', NULL,
-        false, NULL, 1, true);
-
-    -- Rejoinder (from Reply) — CONDITIONAL: duration changes if CCR
-    v_inf_rejoin := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_rejoin, v_inf, v_inf_reply, 'inf.rejoin', 'Rejoinder',
-        'Defendant''s rejoinder to the reply',
-        'defendant', 'filing', true, 1, 'months', 'RoP.029c', NULL,
-        false, NULL, 0, true);
-
-    -- Interim Conference
-    v_inf_interim := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_interim, v_inf, v_inf_rejoin, 'inf.interim', 'Interim Conference',
-        'Interim conference with the judge-rapporteur',
-        'court', 'hearing', true, 0, 'months', NULL, NULL, false, NULL, 0, true);
-
-    -- Oral Hearing
-    v_inf_oral := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_oral, v_inf, v_inf_interim, 'inf.oral', 'Oral Hearing',
-        'Oral hearing before the panel',
-        'court', 'hearing', true, 0, 'months', NULL, NULL, false, NULL, 0, true);
-
-    -- Decision
-    v_inf_decision := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_inf_decision, v_inf, v_inf_oral, 'inf.decision', 'Decision',
-        'Panel delivers its decision',
-        'court', 'decision', true, 0, 'months', NULL, NULL, false, NULL, 0, true);
-
-    -- Appeal (spawn from Decision — cross-type to APP)
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (gen_random_uuid(), v_app, v_inf_decision, 'inf.appeal', 'Appeal',
-        'Appeal against infringement decision to Court of Appeal',
-        'both', 'filing', true, 2, 'months', 'RoP.220.1', NULL,
-        true, 'Appeal filed', 0, true);
-
-    -- ========================================
-    -- COUNTERCLAIM FOR REVOCATION (spawn from SoD)
-    -- ========================================
-
-    v_ccr_root := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_ccr_root, v_ccr, v_inf_sod, 'ccr.counterclaim', 'Counterclaim for Revocation',
-        'Defendant files counterclaim challenging patent validity (included in SoD)',
-        'defendant', 'filing', true, 0, 'months', NULL, NULL,
-        true, 'Includes counterclaim for revocation', 0, true);
-
-    -- Defence to Counterclaim
-    v_ccr_defence := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_ccr_defence, v_ccr, v_ccr_root, 'ccr.defence', 'Defence to Counterclaim',
-        'Patent proprietor files defence to revocation counterclaim',
-        'claimant', 'filing', true, 3, 'months', 'RoP.050', NULL,
-        false, NULL, 0, true);
-
-    -- Reply in CCR
-    v_ccr_reply := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_ccr_reply, v_ccr, v_ccr_defence, 'ccr.reply', 'Reply in CCR',
-        'Reply in the counterclaim for revocation',
-        'defendant', 'filing', true, 2, 'months', NULL,
-        'Timing overlaps with infringement Rejoinder',
-        false, NULL, 1, true);
-
-    -- Rejoinder in CCR
-    v_ccr_rejoin := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_ccr_rejoin, v_ccr, v_ccr_reply, 'ccr.rejoin', 'Rejoinder in CCR',
-        'Rejoinder in the counterclaim for revocation',
-        'claimant', 'filing', true, 2, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    -- Interim Conference
-    v_ccr_interim := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_ccr_interim, v_ccr, v_ccr_rejoin, 'ccr.interim', 'Interim Conference',
-        'Interim conference covering revocation issues',
-        'court', 'hearing', true, 0, 'months', NULL,
-        'May be combined with infringement IC',
-        false, NULL, 0, true);
-
-    -- Oral Hearing
-    v_ccr_oral := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_ccr_oral, v_ccr, v_ccr_interim, 'ccr.oral', 'Oral Hearing',
-        'Oral hearing on validity',
-        'court', 'hearing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    -- Decision
-    v_ccr_decision := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_ccr_decision, v_ccr, v_ccr_oral, 'ccr.decision', 'Decision',
-        'Decision on validity of the patent',
-        'court', 'decision', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    -- Appeal from CCR
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (gen_random_uuid(), v_app, v_ccr_decision, 'ccr.appeal', 'Appeal',
-        'Appeal against revocation decision to Court of Appeal',
-        'both', 'filing', true, 2, 'months', 'RoP.220.1', NULL,
-        true, 'Appeal filed', 0, true);
-
-    -- Application to Amend Patent (spawn from Defence to CCR)
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (gen_random_uuid(), v_amd, v_ccr_defence, 'ccr.amend', 'Application to Amend Patent',
-        'Patent proprietor applies to amend the patent during revocation proceedings',
-        'claimant', 'filing', false, 0, 'months', NULL, NULL,
-        true, 'Includes application to amend patent', 2, true);
-
-    -- ========================================
-    -- STANDALONE REVOCATION
-    -- ========================================
-
-    v_rev_app := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_rev_app, v_rev, NULL, 'rev.app', 'Application for Revocation',
-        'Applicant files standalone application for revocation of the patent',
-        'claimant', 'filing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_rev_defence := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_rev_defence, v_rev, v_rev_app, 'rev.defence', 'Defence to Revocation',
-        'Patent proprietor files defence to revocation application',
-        'defendant', 'filing', true, 3, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_rev_reply := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_rev_reply, v_rev, v_rev_defence, 'rev.reply', 'Reply',
-        'Reply in standalone revocation proceedings',
-        'claimant', 'filing', true, 2, 'months', NULL, NULL,
-        false, NULL, 1, true);
-
-    v_rev_rejoin := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_rev_rejoin, v_rev, v_rev_reply, 'rev.rejoin', 'Rejoinder',
-        'Rejoinder in standalone revocation proceedings',
-        'defendant', 'filing', true, 2, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_rev_interim := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_rev_interim, v_rev, v_rev_rejoin, 'rev.interim', 'Interim Conference',
-        'Interim conference with the judge-rapporteur',
-        'court', 'hearing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_rev_oral := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_rev_oral, v_rev, v_rev_interim, 'rev.oral', 'Oral Hearing',
-        'Oral hearing on validity in standalone revocation',
-        'court', 'hearing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_rev_decision := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_rev_decision, v_rev, v_rev_oral, 'rev.decision', 'Decision',
-        'Decision on patent validity',
-        'court', 'decision', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    -- Appeal from REV
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (gen_random_uuid(), v_app, v_rev_decision, 'rev.appeal', 'Appeal',
-        'Appeal against revocation decision to Court of Appeal',
-        'both', 'filing', true, 2, 'months', 'RoP.220.1', NULL,
-        true, 'Appeal filed', 0, true);
-
-    -- Application to Amend Patent from REV Defence
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (gen_random_uuid(), v_amd, v_rev_defence, 'rev.amend', 'Application to Amend Patent',
-        'Patent proprietor applies to amend the patent',
-        'claimant', 'filing', false, 0, 'months', NULL, NULL,
-        true, 'Includes application to amend patent', 2, true);
-
-    -- ========================================
-    -- PRELIMINARY INJUNCTION
-    -- ========================================
-
-    v_pi_app := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_pi_app, v_apm, NULL, 'pi.app', 'Application for Provisional Measures',
-        'Claimant files application for preliminary injunction',
-        'claimant', 'filing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_pi_resp := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_pi_resp, v_apm, v_pi_app, 'pi.response', 'Response to PI Application',
-        'Defendant files response to preliminary injunction application',
-        'defendant', 'filing', true, 0, 'months', NULL,
-        'Deadline set by court',
-        false, NULL, 0, true);
-
-    v_pi_oral := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_pi_oral, v_apm, v_pi_resp, 'pi.oral', 'Oral Hearing',
-        'Oral hearing on provisional measures',
-        'court', 'hearing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (gen_random_uuid(), v_apm, v_pi_oral, 'pi.order', 'Order on Provisional Measures',
-        'Court issues order on preliminary injunction',
-        'court', 'decision', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    -- ========================================
-    -- APPEAL (standalone)
-    -- ========================================
-
-    v_app_notice := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_app_notice, v_app, NULL, 'app.notice', 'Notice of Appeal',
-        'Appellant files notice of appeal with the Court of Appeal',
-        'both', 'filing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_app_grounds := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_app_grounds, v_app, v_app_notice, 'app.grounds', 'Statement of Grounds of Appeal',
-        'Appellant files statement of grounds',
-        'both', 'filing', true, 2, 'months', 'RoP.220.1', NULL,
-        false, NULL, 0, true);
-
-    v_app_response := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_app_response, v_app, v_app_grounds, 'app.response', 'Response to Appeal',
-        'Respondent files response to the appeal',
-        'both', 'filing', true, 2, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    v_app_oral := gen_random_uuid();
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (v_app_oral, v_app, v_app_response, 'app.oral', 'Oral Hearing',
-        'Oral hearing before the Court of Appeal',
-        'court', 'hearing', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    INSERT INTO deadline_rules (id, proceeding_type_id, parent_id, code, name, description,
-        primary_party, event_type, is_mandatory, duration_value, duration_unit,
-        rule_code, deadline_notes, is_spawn, spawn_label, sequence_order, is_active)
-    VALUES (gen_random_uuid(), v_app, v_app_oral, 'app.decision', 'Decision',
-        'Court of Appeal delivers its decision',
-        'court', 'decision', true, 0, 'months', NULL, NULL,
-        false, NULL, 0, true);
-
-    -- ========================================
-    -- 5. Set conditional deadlines (from 040)
-    -- ========================================
-
-    -- Reply to Defence: rule code changes when CCR is active
-    -- Default: RoP.029b | With CCR: RoP.029a
-    UPDATE deadline_rules
-    SET condition_rule_id = v_ccr_root,
-        alt_rule_code = 'RoP.029a'
-    WHERE id = v_inf_reply;
-
-    -- Rejoinder: duration changes when CCR is active
-    -- Default: 1 month RoP.029c | With CCR: 2 months RoP.029d
-    UPDATE deadline_rules
-    SET condition_rule_id = v_ccr_root,
-        alt_duration_value = 2,
-        alt_duration_unit = 'months',
-        alt_rule_code = 'RoP.029d'
-    WHERE id = v_inf_rejoin;
-
-END $$;

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

@@ -0,0 +1,51 @@
+"use client";
+
+import { useState } from "react";
+import { useParams } from "next/navigation";
+import { Brain, FileText, Search } from "lucide-react";
+import { CaseStrategy } from "@/components/ai/CaseStrategy";
+import { DocumentDrafter } from "@/components/ai/DocumentDrafter";
+import { SimilarCaseFinder } from "@/components/ai/SimilarCaseFinder";
+
+type AITab = "strategy" | "draft" | "similar";
+
+const TABS: { id: AITab; label: string; icon: typeof Brain }[] = [
+  { id: "strategy", label: "KI-Strategie", icon: Brain },
+  { id: "draft", label: "KI-Entwurf", icon: FileText },
+  { id: "similar", label: "Aehnliche Faelle", icon: Search },
+];
+
+export default function CaseAIPage() {
+  const { id } = useParams<{ id: string }>();
+  const [activeTab, setActiveTab] = useState<AITab>("strategy");
+
+  return (
+    <div>
+      {/* Sub-tabs */}
+      <div className="mb-6 flex gap-1 rounded-lg border border-neutral-200 bg-neutral-50 p-1">
+        {TABS.map((tab) => {
+          const isActive = activeTab === tab.id;
+          return (
+            <button
+              key={tab.id}
+              onClick={() => setActiveTab(tab.id)}
+              className={`inline-flex flex-1 items-center justify-center gap-1.5 rounded-md px-3 py-2 text-sm font-medium transition-colors ${
+                isActive
+                  ? "bg-white text-neutral-900 shadow-sm"
+                  : "text-neutral-500 hover:text-neutral-700"
+              }`}
+            >
+              <tab.icon className="h-4 w-4" />
+              {tab.label}
+            </button>
+          );
+        })}
+      </div>
+
+      {/* Content */}
+      {activeTab === "strategy" && <CaseStrategy caseId={id} />}
+      {activeTab === "draft" && <DocumentDrafter caseId={id} />}
+      {activeTab === "similar" && <SimilarCaseFinder caseId={id} />}
+    </div>
+  );
+}

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

@@ -17,6 +17,7 @@ import {
   StickyNote,
   AlertTriangle,
   ScrollText,
+  Brain,
 } from "lucide-react";
 import { format } from "date-fns";
 import { de } from "date-fns/locale";
@@ -48,6 +49,7 @@ const TABS = [
   { segment: "mitarbeiter", label: "Mitarbeiter", icon: UserCheck },
   { segment: "notizen", label: "Notizen", icon: StickyNote },
   { segment: "protokoll", label: "Protokoll", icon: ScrollText },
+  { segment: "ki", label: "KI", icon: Brain },
 ] as const;
 
 const TAB_LABELS: Record<string, string> = {
@@ -58,6 +60,7 @@ const TAB_LABELS: Record<string, string> = {
   mitarbeiter: "Mitarbeiter",
   notizen: "Notizen",
   protokoll: "Protokoll",
+  ki: "KI",
 };
 
 function CaseDetailSkeleton() {

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

@@ -1,61 +1,28 @@
 "use client";
 
 import { DeadlineCalculator } from "@/components/deadlines/DeadlineCalculator";
-import { DeadlineWizard } from "@/components/deadlines/DeadlineWizard";
 import { ArrowLeft } from "lucide-react";
 import Link from "next/link";
-import { useState } from "react";
 
 export default function FristenrechnerPage() {
-  const [mode, setMode] = useState<"wizard" | "quick">("wizard");
-
   return (
     <div className="animate-fade-in space-y-4">
-      <div className="flex items-start justify-between">
-        <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" />
-            Zurueck zu Fristen
-          </Link>
-          <h1 className="text-lg font-semibold text-neutral-900">
-            Fristenbestimmung
-          </h1>
-          <p className="mt-0.5 text-sm text-neutral-500">
-            {mode === "wizard"
-              ? "Vollstaendige Verfahrens-Timeline mit automatischer Fristenberechnung"
-              : "Schnellberechnung einzelner Fristen nach Verfahrensart"}
-          </p>
-        </div>
-
-        {/* Mode toggle */}
-        <div className="flex rounded-md border border-neutral-200 bg-neutral-50 p-0.5">
-          <button
-            onClick={() => setMode("wizard")}
-            className={`rounded px-3 py-1 text-xs font-medium transition-colors ${
-              mode === "wizard"
-                ? "bg-white text-neutral-900 shadow-sm"
-                : "text-neutral-500 hover:text-neutral-700"
-            }`}
-          >
-            Verfahren
-          </button>
-          <button
-            onClick={() => setMode("quick")}
-            className={`rounded px-3 py-1 text-xs font-medium transition-colors ${
-              mode === "quick"
-                ? "bg-white text-neutral-900 shadow-sm"
-                : "text-neutral-500 hover:text-neutral-700"
-            }`}
-          >
-            Schnell
-          </button>
-        </div>
+      <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>
-
-      {mode === "wizard" ? <DeadlineWizard /> : <DeadlineCalculator />}
+      <DeadlineCalculator />
     </div>
   );
 }

frontend/src/components/ai/CaseStrategy.tsx

@@ -0,0 +1,226 @@
+"use client";
+
+import { useMutation } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { StrategyRecommendation } from "@/lib/types";
+import {
+  Loader2,
+  Brain,
+  AlertTriangle,
+  ArrowRight,
+  Shield,
+  Calendar,
+  RefreshCw,
+} from "lucide-react";
+
+interface CaseStrategyProps {
+  caseId: string;
+}
+
+const PRIORITY_STYLES = {
+  high: "bg-red-50 text-red-700 border-red-200",
+  medium: "bg-amber-50 text-amber-700 border-amber-200",
+  low: "bg-emerald-50 text-emerald-700 border-emerald-200",
+} as const;
+
+const IMPORTANCE_STYLES = {
+  critical: "border-l-red-500",
+  important: "border-l-amber-500",
+  routine: "border-l-neutral-300",
+} as const;
+
+export function CaseStrategy({ caseId }: CaseStrategyProps) {
+  const mutation = useMutation({
+    mutationFn: () =>
+      api.post<StrategyRecommendation>("/ai/case-strategy", {
+        case_id: caseId,
+      }),
+  });
+
+  if (!mutation.data && !mutation.isPending && !mutation.isError) {
+    return (
+      <div className="flex flex-col items-center gap-3 py-8 text-center">
+        <div className="rounded-xl bg-neutral-100 p-3">
+          <Brain className="h-6 w-6 text-neutral-400" />
+        </div>
+        <div>
+          <p className="text-sm font-medium text-neutral-900">
+            KI-Strategieanalyse
+          </p>
+          <p className="mt-1 text-sm text-neutral-500">
+            Claude analysiert die Akte und gibt strategische Empfehlungen.
+          </p>
+        </div>
+        <button
+          onClick={() => mutation.mutate()}
+          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"
+        >
+          <Brain className="h-4 w-4" />
+          Strategie analysieren
+        </button>
+      </div>
+    );
+  }
+
+  if (mutation.isPending) {
+    return (
+      <div className="flex flex-col items-center gap-3 py-12 text-center">
+        <Loader2 className="h-6 w-6 animate-spin text-neutral-400" />
+        <p className="text-sm text-neutral-500">
+          Claude analysiert die Akte...
+        </p>
+        <p className="text-xs text-neutral-400">
+          Dies kann bis zu 30 Sekunden dauern.
+        </p>
+      </div>
+    );
+  }
+
+  if (mutation.isError) {
+    return (
+      <div className="flex flex-col items-center gap-3 py-8 text-center">
+        <div className="rounded-xl bg-red-50 p-3">
+          <AlertTriangle className="h-6 w-6 text-red-500" />
+        </div>
+        <p className="text-sm text-neutral-900">Analyse fehlgeschlagen</p>
+        <button
+          onClick={() => mutation.mutate()}
+          className="inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
+        >
+          <RefreshCw className="h-3.5 w-3.5" />
+          Erneut versuchen
+        </button>
+      </div>
+    );
+  }
+
+  const data = mutation.data!;
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center justify-between">
+        <h3 className="text-sm font-semibold text-neutral-900">
+          KI-Strategieanalyse
+        </h3>
+        <button
+          onClick={() => mutation.mutate()}
+          className="inline-flex items-center gap-1 rounded-md border border-neutral-200 px-2.5 py-1.5 text-xs font-medium text-neutral-600 transition-colors hover:bg-neutral-50"
+        >
+          <RefreshCw className="h-3.5 w-3.5" />
+          Aktualisieren
+        </button>
+      </div>
+
+      {/* Summary */}
+      <div className="rounded-md border border-blue-100 bg-blue-50 px-4 py-3 text-sm text-blue-800">
+        {data.summary}
+      </div>
+
+      {/* Next Steps */}
+      {data.next_steps?.length > 0 && (
+        <div>
+          <h4 className="mb-2 flex items-center gap-1.5 text-xs font-semibold uppercase tracking-wide text-neutral-500">
+            <ArrowRight className="h-3.5 w-3.5" />
+            Naechste Schritte
+          </h4>
+          <div className="space-y-2">
+            {data.next_steps.map((step, i) => (
+              <div
+                key={i}
+                className="rounded-md border border-neutral-200 bg-white px-4 py-3"
+              >
+                <div className="flex items-start gap-3">
+                  <span
+                    className={`mt-0.5 inline-block shrink-0 rounded-full border px-2 py-0.5 text-xs font-medium ${PRIORITY_STYLES[step.priority]}`}
+                  >
+                    {step.priority === "high"
+                      ? "Hoch"
+                      : step.priority === "medium"
+                        ? "Mittel"
+                        : "Niedrig"}
+                  </span>
+                  <div className="min-w-0">
+                    <p className="text-sm font-medium text-neutral-900">
+                      {step.action}
+                    </p>
+                    <p className="mt-1 text-sm text-neutral-500">
+                      {step.reasoning}
+                    </p>
+                    {step.deadline && (
+                      <p className="mt-1 text-xs text-neutral-400">
+                        Frist: {step.deadline}
+                      </p>
+                    )}
+                  </div>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Risk Assessment */}
+      {data.risk_assessment?.length > 0 && (
+        <div>
+          <h4 className="mb-2 flex items-center gap-1.5 text-xs font-semibold uppercase tracking-wide text-neutral-500">
+            <Shield className="h-3.5 w-3.5" />
+            Risikobewertung
+          </h4>
+          <div className="space-y-2">
+            {data.risk_assessment.map((risk, i) => (
+              <div
+                key={i}
+                className="rounded-md border border-neutral-200 bg-white px-4 py-3"
+              >
+                <div className="flex items-start gap-3">
+                  <span
+                    className={`mt-0.5 inline-block shrink-0 rounded-full border px-2 py-0.5 text-xs font-medium ${PRIORITY_STYLES[risk.level]}`}
+                  >
+                    {risk.level === "high"
+                      ? "Hoch"
+                      : risk.level === "medium"
+                        ? "Mittel"
+                        : "Niedrig"}
+                  </span>
+                  <div className="min-w-0">
+                    <p className="text-sm font-medium text-neutral-900">
+                      {risk.risk}
+                    </p>
+                    <p className="mt-1 text-sm text-neutral-500">
+                      Massnahme: {risk.mitigation}
+                    </p>
+                  </div>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Timeline */}
+      {data.timeline?.length > 0 && (
+        <div>
+          <h4 className="mb-2 flex items-center gap-1.5 text-xs font-semibold uppercase tracking-wide text-neutral-500">
+            <Calendar className="h-3.5 w-3.5" />
+            Zeitplan
+          </h4>
+          <div className="space-y-1">
+            {data.timeline.map((item, i) => (
+              <div
+                key={i}
+                className={`border-l-2 py-2 pl-4 ${IMPORTANCE_STYLES[item.importance]}`}
+              >
+                <div className="flex items-baseline gap-2">
+                  <span className="shrink-0 text-xs font-medium text-neutral-400">
+                    {item.date}
+                  </span>
+                  <span className="text-sm text-neutral-900">{item.event}</span>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/ai/DocumentDrafter.tsx

@@ -0,0 +1,198 @@
+"use client";
+
+import { useState } from "react";
+import { useMutation } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { DocumentDraft, DraftDocumentRequest } from "@/lib/types";
+import { FileText, Loader2, Copy, Check, Download } from "lucide-react";
+
+const TEMPLATES = {
+  klageschrift: "Klageschrift",
+  klageerwiderung: "Klageerwiderung",
+  abmahnung: "Abmahnung",
+  schriftsatz: "Schriftsatz",
+  berufung: "Berufungsschrift",
+  antrag: "Antrag",
+  stellungnahme: "Stellungnahme",
+  gutachten: "Gutachten",
+  vertrag: "Vertrag",
+  vollmacht: "Vollmacht",
+  upc_claim: "UPC Statement of Claim",
+  upc_defence: "UPC Statement of Defence",
+  upc_counterclaim: "UPC Counterclaim for Revocation",
+  upc_injunction: "UPC Provisional Measures",
+} as const;
+
+const LANGUAGES = [
+  { value: "de", label: "Deutsch" },
+  { value: "en", label: "English" },
+  { value: "fr", label: "Francais" },
+] as const;
+
+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";
+
+interface DocumentDrafterProps {
+  caseId: string;
+}
+
+export function DocumentDrafter({ caseId }: DocumentDrafterProps) {
+  const [templateType, setTemplateType] = useState("");
+  const [instructions, setInstructions] = useState("");
+  const [language, setLanguage] = useState("de");
+  const [copied, setCopied] = useState(false);
+
+  const mutation = useMutation({
+    mutationFn: (req: DraftDocumentRequest) =>
+      api.post<DocumentDraft>("/ai/draft-document", req),
+  });
+
+  function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!templateType) return;
+    mutation.mutate({
+      case_id: caseId,
+      template_type: templateType,
+      instructions,
+      language,
+    });
+  }
+
+  function handleCopy() {
+    if (mutation.data?.content) {
+      navigator.clipboard.writeText(mutation.data.content);
+      setCopied(true);
+      setTimeout(() => setCopied(false), 2000);
+    }
+  }
+
+  function handleDownload() {
+    if (!mutation.data?.content) return;
+    const blob = new Blob([mutation.data.content], { type: "text/plain;charset=utf-8" });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = `${templateType}_entwurf.txt`;
+    a.click();
+    URL.revokeObjectURL(url);
+  }
+
+  return (
+    <div className="space-y-4">
+      <form onSubmit={handleSubmit} className="space-y-3">
+        <div>
+          <label className="mb-1 block text-xs font-medium text-neutral-500">
+            Dokumenttyp
+          </label>
+          <select
+            value={templateType}
+            onChange={(e) => setTemplateType(e.target.value)}
+            className={inputClass}
+            disabled={mutation.isPending}
+          >
+            <option value="">Dokumenttyp waehlen...</option>
+            {Object.entries(TEMPLATES).map(([key, label]) => (
+              <option key={key} value={key}>
+                {label}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div>
+          <label className="mb-1 block text-xs font-medium text-neutral-500">
+            Sprache
+          </label>
+          <select
+            value={language}
+            onChange={(e) => setLanguage(e.target.value)}
+            className={inputClass}
+            disabled={mutation.isPending}
+          >
+            {LANGUAGES.map((lang) => (
+              <option key={lang.value} value={lang.value}>
+                {lang.label}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div>
+          <label className="mb-1 block text-xs font-medium text-neutral-500">
+            Anweisungen (optional)
+          </label>
+          <textarea
+            value={instructions}
+            onChange={(e) => setInstructions(e.target.value)}
+            placeholder="z.B. 'Fokus auf Patentanspruch 1, besonders die technischen Merkmale...'"
+            rows={3}
+            className={inputClass}
+            disabled={mutation.isPending}
+          />
+        </div>
+
+        <button
+          type="submit"
+          disabled={!templateType || mutation.isPending}
+          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:opacity-50"
+        >
+          {mutation.isPending ? (
+            <>
+              <Loader2 className="h-4 w-4 animate-spin" />
+              Dokument wird erstellt...
+            </>
+          ) : (
+            <>
+              <FileText className="h-4 w-4" />
+              KI-Entwurf erstellen
+            </>
+          )}
+        </button>
+      </form>
+
+      {mutation.isError && (
+        <div className="rounded-md border border-red-200 bg-red-50 px-4 py-3 text-sm text-red-700">
+          Fehler beim Erstellen des Entwurfs. Bitte versuchen Sie es erneut.
+        </div>
+      )}
+
+      {mutation.data && (
+        <div className="space-y-3">
+          <div className="flex items-center justify-between">
+            <h4 className="text-sm font-medium text-neutral-900">
+              {mutation.data.title}
+            </h4>
+            <div className="flex items-center gap-2">
+              <button
+                onClick={handleCopy}
+                className="inline-flex items-center gap-1 rounded-md border border-neutral-200 px-2.5 py-1.5 text-xs font-medium text-neutral-600 transition-colors hover:bg-neutral-50"
+              >
+                {copied ? (
+                  <>
+                    <Check className="h-3.5 w-3.5 text-emerald-500" />
+                    Kopiert
+                  </>
+                ) : (
+                  <>
+                    <Copy className="h-3.5 w-3.5" />
+                    Kopieren
+                  </>
+                )}
+              </button>
+              <button
+                onClick={handleDownload}
+                className="inline-flex items-center gap-1 rounded-md border border-neutral-200 px-2.5 py-1.5 text-xs font-medium text-neutral-600 transition-colors hover:bg-neutral-50"
+              >
+                <Download className="h-3.5 w-3.5" />
+                Download
+              </button>
+            </div>
+          </div>
+          <pre className="max-h-[600px] overflow-auto whitespace-pre-wrap rounded-md border border-neutral-200 bg-neutral-50 p-4 text-sm text-neutral-800">
+            {mutation.data.content}
+          </pre>
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/ai/SimilarCaseFinder.tsx

@@ -0,0 +1,183 @@
+"use client";
+
+import { useState } from "react";
+import { useMutation } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { SimilarCasesResponse } from "@/lib/types";
+import {
+  Loader2,
+  Search,
+  ExternalLink,
+  AlertTriangle,
+  Scale,
+  RefreshCw,
+} from "lucide-react";
+
+interface SimilarCaseFinderProps {
+  caseId: string;
+}
+
+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";
+
+function RelevanceBadge({ score }: { score: number }) {
+  const pct = Math.round(score * 100);
+  let color = "bg-neutral-100 text-neutral-600";
+  if (pct >= 80) color = "bg-emerald-50 text-emerald-700";
+  else if (pct >= 60) color = "bg-blue-50 text-blue-700";
+  else if (pct >= 40) color = "bg-amber-50 text-amber-700";
+  return (
+    <span
+      className={`inline-block shrink-0 rounded-full px-2 py-0.5 text-xs font-medium ${color}`}
+    >
+      {pct}%
+    </span>
+  );
+}
+
+export function SimilarCaseFinder({ caseId }: SimilarCaseFinderProps) {
+  const [description, setDescription] = useState("");
+
+  const mutation = useMutation({
+    mutationFn: (req: { case_id: string; description: string }) =>
+      api.post<SimilarCasesResponse>("/ai/similar-cases", req),
+  });
+
+  function handleSearch(e?: React.FormEvent) {
+    e?.preventDefault();
+    mutation.mutate({ case_id: caseId, description });
+  }
+
+  return (
+    <div className="space-y-4">
+      <form onSubmit={handleSearch} className="space-y-3">
+        <div>
+          <label className="mb-1 block text-xs font-medium text-neutral-500">
+            Zusaetzliche Beschreibung (optional)
+          </label>
+          <textarea
+            value={description}
+            onChange={(e) => setDescription(e.target.value)}
+            placeholder="z.B. 'SEP-Lizenzierung im Mobilfunkbereich, FRAND-Verteidigung...'"
+            rows={2}
+            className={inputClass}
+            disabled={mutation.isPending}
+          />
+        </div>
+
+        <button
+          type="submit"
+          disabled={mutation.isPending}
+          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:opacity-50"
+        >
+          {mutation.isPending ? (
+            <>
+              <Loader2 className="h-4 w-4 animate-spin" />
+              Suche laeuft...
+            </>
+          ) : (
+            <>
+              <Search className="h-4 w-4" />
+              Aehnliche Faelle suchen
+            </>
+          )}
+        </button>
+      </form>
+
+      {mutation.isError && (
+        <div className="flex flex-col items-center gap-3 py-6 text-center">
+          <div className="rounded-xl bg-red-50 p-3">
+            <AlertTriangle className="h-6 w-6 text-red-500" />
+          </div>
+          <p className="text-sm text-neutral-900">Suche fehlgeschlagen</p>
+          <p className="text-xs text-neutral-500">
+            Die youpc.org-Datenbank ist moeglicherweise nicht verfuegbar.
+          </p>
+          <button
+            onClick={() => handleSearch()}
+            className="inline-flex items-center gap-1 text-sm text-neutral-500 transition-colors hover:text-neutral-700"
+          >
+            <RefreshCw className="h-3.5 w-3.5" />
+            Erneut versuchen
+          </button>
+        </div>
+      )}
+
+      {mutation.data && (
+        <div className="space-y-3">
+          <div className="flex items-center justify-between">
+            <p className="text-xs text-neutral-500">
+              {mutation.data.count} aehnliche{" "}
+              {mutation.data.count === 1 ? "Fall" : "Faelle"} gefunden
+            </p>
+            <button
+              onClick={() => handleSearch()}
+              disabled={mutation.isPending}
+              className="inline-flex items-center gap-1 rounded-md border border-neutral-200 px-2.5 py-1.5 text-xs font-medium text-neutral-600 transition-colors hover:bg-neutral-50"
+            >
+              <RefreshCw className="h-3.5 w-3.5" />
+              Aktualisieren
+            </button>
+          </div>
+
+          {mutation.data.cases?.length === 0 && (
+            <div className="flex flex-col items-center gap-2 py-6 text-center">
+              <Scale className="h-6 w-6 text-neutral-300" />
+              <p className="text-sm text-neutral-500">
+                Keine aehnlichen UPC-Faelle gefunden.
+              </p>
+            </div>
+          )}
+
+          {mutation.data.cases?.map((c, i) => (
+            <div
+              key={i}
+              className="rounded-md border border-neutral-200 bg-white px-4 py-3"
+            >
+              <div className="flex items-start justify-between gap-3">
+                <div className="min-w-0 flex-1">
+                  <div className="flex items-center gap-2">
+                    <RelevanceBadge score={c.relevance} />
+                    <span className="text-xs font-medium text-neutral-400">
+                      {c.case_number}
+                    </span>
+                    {c.url && (
+                      <a
+                        href={c.url}
+                        target="_blank"
+                        rel="noopener noreferrer"
+                        className="text-neutral-400 transition-colors hover:text-neutral-600"
+                      >
+                        <ExternalLink className="h-3.5 w-3.5" />
+                      </a>
+                    )}
+                  </div>
+                  <p className="mt-1 text-sm font-medium text-neutral-900">
+                    {c.title}
+                  </p>
+                  <div className="mt-1 flex flex-wrap gap-x-3 text-xs text-neutral-400">
+                    {c.court && <span>{c.court}</span>}
+                    {c.date && <span>{c.date}</span>}
+                  </div>
+                </div>
+              </div>
+
+              <p className="mt-2 text-sm text-neutral-600">{c.explanation}</p>
+
+              {c.key_holdings && (
+                <div className="mt-2 rounded border border-neutral-100 bg-neutral-50 px-3 py-2">
+                  <p className="text-xs font-medium text-neutral-500">
+                    Relevante Entscheidungsgruende
+                  </p>
+                  <p className="mt-0.5 text-xs text-neutral-600">
+                    {c.key_holdings}
+                  </p>
+                </div>
+              )}
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/deadlines/DeadlineWizard.tsx

@@ -1,622 +0,0 @@
-"use client";
-
-import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
-import { api } from "@/lib/api";
-import type {
-  ProceedingType,
-  TimelineResponse,
-  DetermineResponse,
-  TimelineEvent,
-  Case,
-} from "@/lib/types";
-import { format, parseISO, isPast, isThisWeek, isBefore, addDays } from "date-fns";
-import { de } from "date-fns/locale";
-import {
-  Scale,
-  Calendar,
-  ChevronRight,
-  ChevronDown,
-  GitBranch,
-  Check,
-  Clock,
-  AlertTriangle,
-  FileText,
-  Users,
-  Gavel,
-  ArrowRight,
-  RotateCcw,
-  Loader2,
-  CheckCircle2,
-  FolderOpen,
-} from "lucide-react";
-import { useState, useCallback, useMemo } from "react";
-import { toast } from "sonner";
-
-// --- Helpers ---
-
-function formatDuration(value: number, unit: string): string {
-  if (value === 0) return "";
-  const labels: Record<string, string> = {
-    days: value === 1 ? "Tag" : "Tage",
-    weeks: value === 1 ? "Woche" : "Wochen",
-    months: value === 1 ? "Monat" : "Monate",
-  };
-  return `${value} ${labels[unit] || unit}`;
-}
-
-function getPartyIcon(party?: string) {
-  switch (party) {
-    case "claimant":
-      return <Scale className="h-3.5 w-3.5" />;
-    case "defendant":
-      return <Users className="h-3.5 w-3.5" />;
-    case "court":
-      return <Gavel className="h-3.5 w-3.5" />;
-    default:
-      return <FileText className="h-3.5 w-3.5" />;
-  }
-}
-
-function getPartyLabel(party?: string): string {
-  switch (party) {
-    case "claimant":
-      return "Klaeger";
-    case "defendant":
-      return "Beklagter";
-    case "court":
-      return "Gericht";
-    case "both":
-      return "Beide Parteien";
-    default:
-      return "";
-  }
-}
-
-function getEventTypeLabel(type?: string): string {
-  switch (type) {
-    case "filing":
-      return "Einreichung";
-    case "hearing":
-      return "Verhandlung";
-    case "decision":
-      return "Entscheidung";
-    default:
-      return "";
-  }
-}
-
-type Urgency = "past" | "overdue" | "this_week" | "upcoming" | "future" | "none";
-
-function getUrgency(dateStr?: string): Urgency {
-  if (!dateStr) return "none";
-  const date = parseISO(dateStr);
-  const today = new Date();
-  today.setHours(0, 0, 0, 0);
-  if (isPast(date) && isBefore(date, today)) return "overdue";
-  if (isThisWeek(date, { weekStartsOn: 1 })) return "this_week";
-  if (isBefore(date, addDays(today, 30))) return "upcoming";
-  return "future";
-}
-
-const urgencyStyles: Record<Urgency, { dot: string; text: string; bg: string }> = {
-  past: { dot: "bg-neutral-400", text: "text-neutral-500", bg: "bg-neutral-50" },
-  overdue: { dot: "bg-red-500", text: "text-red-700", bg: "bg-red-50" },
-  this_week: { dot: "bg-amber-500", text: "text-amber-700", bg: "bg-amber-50" },
-  upcoming: { dot: "bg-blue-500", text: "text-blue-700", bg: "bg-blue-50" },
-  future: { dot: "bg-green-500", text: "text-green-700", bg: "bg-green-50" },
-  none: { dot: "bg-neutral-300", text: "text-neutral-500", bg: "bg-neutral-50" },
-};
-
-// --- Spawn Extraction ---
-
-function extractSpawns(events: TimelineEvent[]): TimelineEvent[] {
-  const spawns: TimelineEvent[] = [];
-  function walk(evts: TimelineEvent[]) {
-    for (const ev of evts) {
-      if (ev.is_spawn) spawns.push(ev);
-      if (ev.children) walk(ev.children);
-    }
-  }
-  walk(events);
-  return spawns;
-}
-
-// --- Flat timeline extraction ---
-
-function flattenTimeline(events: TimelineEvent[], depth = 0): (TimelineEvent & { depth: number })[] {
-  const result: (TimelineEvent & { depth: number })[] = [];
-  for (const ev of events) {
-    result.push({ ...ev, depth });
-    if (ev.children && ev.children.length > 0) {
-      result.push(...flattenTimeline(ev.children, depth + 1));
-    }
-  }
-  return result;
-}
-
-// --- Main Component ---
-
-export function DeadlineWizard() {
-  const [selectedType, setSelectedType] = useState<string>("");
-  const [triggerDate, setTriggerDate] = useState("");
-  const [conditions, setConditions] = useState<Record<string, boolean>>({});
-  const [selectedCaseId, setSelectedCaseId] = useState<string>("");
-  const [showBatchPanel, setShowBatchPanel] = useState(false);
-  const queryClient = useQueryClient();
-
-  // Fetch proceeding types
-  const { data: proceedingTypes, isLoading: typesLoading } = useQuery({
-    queryKey: ["proceeding-types"],
-    queryFn: () => api.get<ProceedingType[]>("/proceeding-types"),
-  });
-
-  // Fetch timeline structure when type is selected
-  const { data: timelineData } = useQuery({
-    queryKey: ["timeline", selectedType],
-    queryFn: () => api.get<TimelineResponse>(`/proceeding-types/${selectedType}/timeline`),
-    enabled: !!selectedType,
-  });
-
-  // Determine mutation
-  const determineMutation = useMutation({
-    mutationFn: (params: { proceeding_type: string; trigger_event_date: string; conditions: Record<string, boolean> }) =>
-      api.post<DetermineResponse>("/deadlines/determine", params),
-  });
-
-  // Cases for batch create
-  const { data: cases } = useQuery({
-    queryKey: ["cases"],
-    queryFn: () => api.get<Case[]>("/cases"),
-    enabled: showBatchPanel,
-  });
-
-  // Batch create mutation
-  const batchMutation = useMutation({
-    mutationFn: (params: { caseId: string; deadlines: { title: string; due_date: string; rule_code?: string }[] }) =>
-      api.post(`/cases/${params.caseId}/deadlines/batch`, { deadlines: params.deadlines }),
-    onSuccess: () => {
-      toast.success("Alle Fristen wurden auf die Akte uebernommen");
-      queryClient.invalidateQueries({ queryKey: ["deadlines"] });
-      setShowBatchPanel(false);
-    },
-    onError: () => {
-      toast.error("Fehler beim Erstellen der Fristen");
-    },
-  });
-
-  // Spawns from timeline structure (for condition toggles)
-  const spawns = useMemo(() => {
-    if (!timelineData?.timeline) return [];
-    return extractSpawns(timelineData.timeline);
-  }, [timelineData]);
-
-  // Calculate on type/date/condition change
-  const calculate = useCallback(() => {
-    if (!selectedType || !triggerDate) return;
-    determineMutation.mutate({
-      proceeding_type: selectedType,
-      trigger_event_date: triggerDate,
-      conditions,
-    });
-  }, [selectedType, triggerDate, conditions, determineMutation]);
-
-  // Auto-calculate when date or conditions change
-  const handleDateChange = (date: string) => {
-    setTriggerDate(date);
-    if (selectedType && date) {
-      determineMutation.mutate({
-        proceeding_type: selectedType,
-        trigger_event_date: date,
-        conditions,
-      });
-    }
-  };
-
-  const handleConditionToggle = (spawnId: string) => {
-    const next = { ...conditions, [spawnId]: !conditions[spawnId] };
-    setConditions(next);
-    if (selectedType && triggerDate) {
-      determineMutation.mutate({
-        proceeding_type: selectedType,
-        trigger_event_date: triggerDate,
-        conditions: next,
-      });
-    }
-  };
-
-  const handleTypeSelect = (code: string) => {
-    setSelectedType(code);
-    setConditions({});
-    if (triggerDate) {
-      // Will recalculate once timeline loads
-      determineMutation.reset();
-    }
-  };
-
-  const handleReset = () => {
-    setSelectedType("");
-    setTriggerDate("");
-    setConditions({});
-    setShowBatchPanel(false);
-    determineMutation.reset();
-  };
-
-  // Collect calculated deadlines for batch create
-  const collectDeadlines = (events: TimelineEvent[]): { title: string; due_date: string; rule_code?: string }[] => {
-    const result: { title: string; due_date: string; rule_code?: string }[] = [];
-    for (const ev of events) {
-      if (ev.date && ev.duration_value > 0) {
-        result.push({ title: ev.name, due_date: ev.date, rule_code: ev.rule_code || undefined });
-      }
-      if (ev.children) result.push(...collectDeadlines(ev.children));
-    }
-    return result;
-  };
-
-  const results = determineMutation.data;
-  const selectedPT = proceedingTypes?.find((pt) => pt.code === selectedType);
-
-  return (
-    <div className="space-y-5">
-      {/* Step 1: Proceeding Type Selection */}
-      <div className="rounded-lg border border-neutral-200 bg-white p-5">
-        <div className="flex items-center justify-between">
-          <div className="flex items-center gap-2 text-sm font-medium text-neutral-900">
-            <Scale className="h-4 w-4" />
-            Verfahrensart waehlen
-          </div>
-          {selectedType && (
-            <button
-              onClick={handleReset}
-              className="flex items-center gap-1 text-xs text-neutral-500 hover:text-neutral-700"
-            >
-              <RotateCcw className="h-3 w-3" />
-              Zuruecksetzen
-            </button>
-          )}
-        </div>
-
-        <div className="mt-4 grid grid-cols-2 gap-2 sm:grid-cols-3 lg:grid-cols-6">
-          {typesLoading ? (
-            <div className="col-span-full flex justify-center py-4">
-              <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
-            </div>
-          ) : (
-            proceedingTypes?.map((pt) => (
-              <button
-                key={pt.id}
-                onClick={() => handleTypeSelect(pt.code)}
-                className={`rounded-lg border px-3 py-2.5 text-left transition-all ${
-                  selectedType === pt.code
-                    ? "border-neutral-900 bg-neutral-900 text-white shadow-sm"
-                    : "border-neutral-200 bg-white text-neutral-700 hover:border-neutral-400 hover:bg-neutral-50"
-                }`}
-              >
-                <div className="flex items-center gap-1.5">
-                  <div
-                    className="h-2 w-2 rounded-full"
-                    style={{ backgroundColor: pt.default_color }}
-                  />
-                  <span className="text-xs font-semibold">{pt.code}</span>
-                </div>
-                <div className="mt-1 text-xs leading-tight opacity-80">{pt.name}</div>
-              </button>
-            ))
-          )}
-        </div>
-      </div>
-
-      {/* Step 2: Date + Conditions */}
-      {selectedType && (
-        <div className="animate-fade-in rounded-lg border border-neutral-200 bg-white p-5">
-          <div className="flex items-center gap-2 text-sm font-medium text-neutral-900">
-            <Calendar className="h-4 w-4" />
-            Ausloesendes Ereignis
-          </div>
-
-          <div className="mt-4 flex flex-col gap-4 sm:flex-row sm:items-end">
-            <div className="flex-1">
-              <label className="mb-1 block text-xs font-medium text-neutral-500">
-                Datum des {selectedPT?.name || selectedType} (z.B. Klagezustellung)
-              </label>
-              <input
-                type="date"
-                value={triggerDate}
-                onChange={(e) => handleDateChange(e.target.value)}
-                className="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"
-              />
-            </div>
-
-            {/* Condition toggles */}
-            {spawns.length > 0 && (
-              <div className="flex flex-wrap gap-2">
-                {spawns.map((spawn) => (
-                  <button
-                    key={spawn.id}
-                    onClick={() => handleConditionToggle(spawn.id)}
-                    className={`flex items-center gap-1.5 rounded-full px-3 py-1.5 text-xs font-medium transition-all ${
-                      conditions[spawn.id]
-                        ? "bg-neutral-900 text-white"
-                        : "border border-neutral-300 bg-white text-neutral-600 hover:bg-neutral-50"
-                    }`}
-                  >
-                    <GitBranch className="h-3 w-3" />
-                    {spawn.spawn_label || spawn.name}
-                    {conditions[spawn.id] && <Check className="h-3 w-3" />}
-                  </button>
-                ))}
-              </div>
-            )}
-          </div>
-        </div>
-      )}
-
-      {/* Error */}
-      {determineMutation.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 pruefen.
-        </div>
-      )}
-
-      {/* Step 3: Calculated Timeline */}
-      {results && results.timeline && (
-        <div className="animate-fade-in space-y-3">
-          {/* Header */}
-          <div className="flex items-center justify-between">
-            <div>
-              <h3 className="text-sm font-medium text-neutral-900">
-                Verfahrens-Timeline: {results.proceeding_name}
-              </h3>
-              <p className="mt-0.5 text-xs text-neutral-500">
-                {results.total_deadlines} Ereignisse ab{" "}
-                {format(parseISO(results.trigger_event_date), "dd. MMMM yyyy", { locale: de })}
-              </p>
-            </div>
-            <button
-              onClick={() => setShowBatchPanel(!showBatchPanel)}
-              className="flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-xs font-medium text-white transition-colors hover:bg-neutral-800"
-            >
-              <CheckCircle2 className="h-3.5 w-3.5" />
-              Alle uebernehmen
-            </button>
-          </div>
-
-          {/* Timeline visualization */}
-          <div className="rounded-lg border border-neutral-200 bg-white">
-            <TimelineTree events={results.timeline} conditions={conditions} depth={0} />
-          </div>
-
-          {/* Batch create panel */}
-          {showBatchPanel && (
-            <div className="animate-fade-in rounded-lg border border-neutral-200 bg-neutral-50 p-4">
-              <div className="flex items-center gap-2 text-sm font-medium text-neutral-900">
-                <FolderOpen className="h-4 w-4" />
-                Fristen auf Akte uebernehmen
-              </div>
-              <div className="mt-3 flex gap-3">
-                <select
-                  value={selectedCaseId}
-                  onChange={(e) => setSelectedCaseId(e.target.value)}
-                  className="flex-1 rounded-md border border-neutral-200 bg-white px-3 py-2 text-sm text-neutral-900 outline-none focus:border-neutral-400"
-                >
-                  <option value="">Akte waehlen...</option>
-                  {cases
-                    ?.filter((c) => c.status !== "closed")
-                    .map((c) => (
-                      <option key={c.id} value={c.id}>
-                        {c.case_number} — {c.title}
-                      </option>
-                    ))}
-                </select>
-                <button
-                  disabled={!selectedCaseId || batchMutation.isPending}
-                  onClick={() => {
-                    const deadlines = collectDeadlines(results.timeline);
-                    if (deadlines.length === 0) return;
-                    batchMutation.mutate({ caseId: selectedCaseId, deadlines });
-                  }}
-                  className="flex items-center gap-1.5 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"
-                >
-                  {batchMutation.isPending ? (
-                    <Loader2 className="h-3.5 w-3.5 animate-spin" />
-                  ) : (
-                    <ArrowRight className="h-3.5 w-3.5" />
-                  )}
-                  {batchMutation.isPending ? "Erstelle..." : `${collectDeadlines(results.timeline).length} Fristen erstellen`}
-                </button>
-              </div>
-            </div>
-          )}
-        </div>
-      )}
-
-      {/* Empty state */}
-      {!results && !determineMutation.isPending && selectedType && triggerDate && (
-        <div className="flex items-center justify-center py-8">
-          <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
-        </div>
-      )}
-
-      {!selectedType && (
-        <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">
-            <Scale className="h-6 w-6 text-neutral-400" />
-          </div>
-          <p className="mt-3 text-sm font-medium text-neutral-700">
-            UPC-Fristenbestimmung
-          </p>
-          <p className="mt-1 max-w-sm text-xs text-neutral-500">
-            Waehlen Sie die Verfahrensart und geben Sie das Datum des ausloesenden Ereignisses ein.
-            Alle Fristen des Verfahrens werden automatisch berechnet.
-          </p>
-        </div>
-      )}
-    </div>
-  );
-}
-
-// --- Timeline Tree Component ---
-
-function TimelineTree({
-  events,
-  conditions,
-  depth,
-}: {
-  events: TimelineEvent[];
-  conditions: Record<string, boolean>;
-  depth: number;
-}) {
-  return (
-    <>
-      {events.map((ev, i) => (
-        <TimelineNode
-          key={ev.id}
-          event={ev}
-          conditions={conditions}
-          depth={depth}
-          isLast={i === events.length - 1}
-        />
-      ))}
-    </>
-  );
-}
-
-function TimelineNode({
-  event: ev,
-  conditions,
-  depth,
-  isLast,
-}: {
-  event: TimelineEvent;
-  conditions: Record<string, boolean>;
-  depth: number;
-  isLast: boolean;
-}) {
-  const [expanded, setExpanded] = useState(true);
-
-  // Skip inactive spawns
-  if (ev.is_spawn && !conditions[ev.id]) return null;
-
-  const hasChildren = ev.children && ev.children.length > 0;
-  const visibleChildren = ev.children?.filter(
-    (c) => !c.is_spawn || conditions[c.id]
-  );
-  const hasVisibleChildren = visibleChildren && visibleChildren.length > 0;
-
-  const urgency = getUrgency(ev.date);
-  const styles = urgencyStyles[urgency];
-  const duration = formatDuration(ev.duration_value, ev.duration_unit);
-  const isConditional = ev.has_condition && ev.condition_rule_id;
-
-  return (
-    <>
-      <div
-        className={`group relative flex gap-3 px-4 py-3 transition-colors hover:bg-neutral-50 ${
-          !isLast && depth === 0 ? "border-b border-neutral-100" : ""
-        }`}
-        style={{ paddingLeft: `${16 + depth * 24}px` }}
-      >
-        {/* Timeline connector */}
-        <div className="flex flex-col items-center pt-1">
-          <div className={`h-3 w-3 shrink-0 rounded-full border-2 border-white shadow-sm ${styles.dot}`} />
-          {!isLast && <div className="mt-1 w-px flex-1 bg-neutral-200" />}
-        </div>
-
-        {/* Content */}
-        <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">
-            <div className="flex items-center gap-1.5">
-              {hasVisibleChildren && (
-                <button
-                  onClick={() => setExpanded(!expanded)}
-                  className="text-neutral-400 hover:text-neutral-600"
-                >
-                  {expanded ? (
-                    <ChevronDown className="h-3.5 w-3.5" />
-                  ) : (
-                    <ChevronRight className="h-3.5 w-3.5" />
-                  )}
-                </button>
-              )}
-              {ev.is_spawn && (
-                <GitBranch className="h-3.5 w-3.5 text-violet-500" />
-              )}
-              <span className="text-sm font-medium text-neutral-900">{ev.name}</span>
-              {!ev.is_mandatory && (
-                <span className="rounded bg-neutral-100 px-1 py-0.5 text-[10px] text-neutral-500">
-                  optional
-                </span>
-              )}
-            </div>
-
-            {/* Date */}
-            {ev.date && (
-              <div className="flex items-center gap-1.5 shrink-0">
-                {ev.was_adjusted && (
-                  <span className="text-[10px] text-amber-600" title={`Original: ${ev.original_date}`}>
-                    angepasst
-                  </span>
-                )}
-                <span className={`text-sm font-medium tabular-nums ${styles.text}`}>
-                  {format(parseISO(ev.date), "dd.MM.yyyy")}
-                </span>
-              </div>
-            )}
-          </div>
-
-          {/* Meta row */}
-          <div className="mt-0.5 flex flex-wrap items-center gap-x-2 gap-y-0.5 text-xs text-neutral-500">
-            {ev.primary_party && (
-              <span className="flex items-center gap-0.5">
-                {getPartyIcon(ev.primary_party)}
-                {getPartyLabel(ev.primary_party)}
-              </span>
-            )}
-            {ev.event_type && (
-              <>
-                <span className="text-neutral-300">·</span>
-                <span>{getEventTypeLabel(ev.event_type)}</span>
-              </>
-            )}
-            {duration && (
-              <>
-                <span className="text-neutral-300">·</span>
-                <span className="flex items-center gap-0.5">
-                  <Clock className="h-3 w-3" />
-                  {duration}
-                </span>
-              </>
-            )}
-            {ev.rule_code && (
-              <>
-                <span className="text-neutral-300">·</span>
-                <span className="rounded bg-neutral-100 px-1 py-0.5 font-mono text-[10px]">
-                  {ev.rule_code}
-                </span>
-              </>
-            )}
-            {isConditional && (
-              <>
-                <span className="text-neutral-300">·</span>
-                <span className="text-violet-600">
-                  bedingt{ev.alt_rule_code ? ` (${ev.alt_rule_code})` : ""}
-                </span>
-              </>
-            )}
-          </div>
-
-          {/* Notes */}
-          {ev.deadline_notes && (
-            <p className="mt-1 text-xs text-neutral-400 italic">{ev.deadline_notes}</p>
-          )}
-        </div>
-      </div>
-
-      {/* Children */}
-      {expanded && hasVisibleChildren && (
-        <TimelineTree events={visibleChildren!} conditions={conditions} depth={depth + 1} />
-      )}
-    </>
-  );
-}

frontend/src/lib/types.ts

@@ -120,76 +120,12 @@ export interface DeadlineRule {
   rule_code?: string;
   deadline_notes?: string;
   sequence_order: number;
-  condition_rule_id?: string;
-  alt_duration_value?: number;
-  alt_duration_unit?: string;
-  alt_rule_code?: string;
-  is_spawn?: boolean;
-  spawn_label?: string;
 }
 
 export interface RuleTreeNode extends DeadlineRule {
   children?: RuleTreeNode[];
 }
 
-// Timeline determination types
-
-export interface TimelineEvent {
-  id: string;
-  code?: string;
-  name: string;
-  description?: string;
-  primary_party?: string;
-  event_type?: string;
-  is_mandatory: boolean;
-  duration_value: number;
-  duration_unit: string;
-  rule_code?: string;
-  deadline_notes?: string;
-  is_spawn: boolean;
-  spawn_label?: string;
-  has_condition: boolean;
-  condition_rule_id?: string;
-  alt_rule_code?: string;
-  alt_duration_value?: number;
-  alt_duration_unit?: string;
-  date?: string;
-  original_date?: string;
-  was_adjusted: boolean;
-  children?: TimelineEvent[];
-}
-
-export interface TimelineResponse {
-  proceeding_type: ProceedingType;
-  timeline: TimelineEvent[];
-}
-
-export interface DetermineRequest {
-  proceeding_type: string;
-  trigger_event_date: string;
-  conditions: Record<string, boolean>;
-}
-
-export interface DetermineResponse {
-  proceeding_type: string;
-  proceeding_name: string;
-  proceeding_color: string;
-  trigger_event_date: string;
-  timeline: TimelineEvent[];
-  total_deadlines: number;
-}
-
-export interface BatchCreateRequest {
-  deadlines: {
-    title: string;
-    due_date: string;
-    original_due_date?: string;
-    rule_id?: string;
-    rule_code?: string;
-    notes?: string;
-  }[];
-}
-
 export interface ProceedingType {
   id: number;
   code: string;
@@ -393,3 +329,81 @@ export interface ExtractionResponse {
   deadlines: ExtractedDeadline[];
   count: number;
 }
+
+// AI Document Drafting
+
+export interface DocumentDraft {
+  title: string;
+  content: string;
+  language: string;
+}
+
+export interface DraftDocumentRequest {
+  case_id: string;
+  template_type: string;
+  instructions: string;
+  language: string;
+}
+
+export const TEMPLATE_TYPES: Record<string, string> = {
+  klageschrift: "Klageschrift",
+  klageerwiderung: "Klageerwiderung",
+  abmahnung: "Abmahnung",
+  schriftsatz: "Schriftsatz",
+  berufung: "Berufungsschrift",
+  antrag: "Antrag",
+  stellungnahme: "Stellungnahme",
+  gutachten: "Gutachten",
+  vertrag: "Vertrag",
+  vollmacht: "Vollmacht",
+  upc_claim: "UPC Statement of Claim",
+  upc_defence: "UPC Statement of Defence",
+  upc_counterclaim: "UPC Counterclaim for Revocation",
+  upc_injunction: "UPC Provisional Measures",
+};
+
+// AI Case Strategy
+
+export interface StrategyStep {
+  priority: "high" | "medium" | "low";
+  action: string;
+  reasoning: string;
+  deadline?: string;
+}
+
+export interface RiskItem {
+  level: "high" | "medium" | "low";
+  risk: string;
+  mitigation: string;
+}
+
+export interface TimelineItem {
+  date: string;
+  event: string;
+  importance: "critical" | "important" | "routine";
+}
+
+export interface StrategyRecommendation {
+  summary: string;
+  next_steps: StrategyStep[];
+  risk_assessment: RiskItem[];
+  timeline: TimelineItem[];
+}
+
+// AI Similar Case Finder
+
+export interface SimilarCase {
+  case_number: string;
+  title: string;
+  court: string;
+  date: string;
+  relevance: number;
+  explanation: string;
+  key_holdings: string;
+  url?: string;
+}
+
+export interface SimilarCasesResponse {
+  cases: SimilarCase[];
+  count: number;
+}