feat: document templates with auto-fill from case data (P1)

- Database: kanzlai.document_templates table with RLS policies
- Seed: 4 system templates (Klageerwiderung UPC, Berufungsschrift,
  Mandatsbestätigung, Kostenrechnung)
- Backend: TemplateService (CRUD + render), TemplateHandler with
  endpoints: GET/POST /api/templates, GET/PUT/DELETE /api/templates/{id},
  POST /api/templates/{id}/render?case_id=X
- Template variables: case.*, party.*, tenant.*, user.*, date.*, deadline.*
- Frontend: /vorlagen page with category filters, template detail/editor,
  render flow (select case -> preview -> copy/download), variable toolbar
- Quick action: "Schriftsatz erstellen" button on case detail page
- Also: resolved merge conflicts between audit-trail and role-based branches,
  added missing Notification/AuditLog types to frontend

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 {
@@ -34,15 +34,6 @@ 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)
@@ -62,3 +53,12 @@ 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/tenant_resolver.go

@@ -35,6 +35,7 @@ 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)
@@ -56,7 +57,7 @@ func (tr *TenantResolver) Resolve(next http.Handler) http.Handler {
 			}
 
 			tenantID = parsed
-			r = r.WithContext(ContextWithUserRole(r.Context(), role))
+			ctx = ContextWithUserRole(ctx, role)
 		} else {
 			// Default to user's first tenant
 			first, err := tr.lookup.FirstTenantForUser(r.Context(), userID)
@@ -71,17 +72,17 @@ func (tr *TenantResolver) Resolve(next http.Handler) http.Handler {
 			}
 			tenantID = *first
 
-			// Also resolve role for default tenant
+			// Get role for default tenant
 			role, err := tr.lookup.GetUserRole(r.Context(), userID, tenantID)
 			if err != nil {
-				slog.Error("failed to get role for default tenant", "error", err, "user_id", userID, "tenant_id", tenantID)
+				slog.Error("failed to get user role", "error", err, "user_id", userID, "tenant_id", tenantID)
 				http.Error(w, `{"error":"internal error"}`, http.StatusInternalServerError)
 				return
 			}
-			r = r.WithContext(ContextWithUserRole(r.Context(), role))
+			ctx = ContextWithUserRole(ctx, role)
 		}
 
-		ctx := ContextWithTenantID(r.Context(), tenantID)
+		ctx = ContextWithTenantID(ctx, tenantID)
 		next.ServeHTTP(w, r.WithContext(ctx))
 	})
 }

backend/internal/auth/tenant_resolver_test.go

@@ -86,7 +86,7 @@ func TestTenantResolver_FromHeader_NoAccess(t *testing.T) {
 
 func TestTenantResolver_DefaultsToFirst(t *testing.T) {
 	tenantID := uuid.New()
-	tr := NewTenantResolver(&mockTenantLookup{tenantID: &tenantID, role: "owner"})
+	tr := NewTenantResolver(&mockTenantLookup{tenantID: &tenantID, role: "associate"})
 
 	var gotTenantID uuid.UUID
 	next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

backend/internal/handlers/billing_rates.go

@@ -1,66 +0,0 @@
-package handlers
-
-import (
-	"encoding/json"
-	"net/http"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
-)
-
-type BillingRateHandler struct {
-	svc *services.BillingRateService
-}
-
-func NewBillingRateHandler(svc *services.BillingRateService) *BillingRateHandler {
-	return &BillingRateHandler{svc: svc}
-}
-
-// List handles GET /api/billing-rates
-func (h *BillingRateHandler) List(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	rates, err := h.svc.List(r.Context(), tenantID)
-	if err != nil {
-		internalError(w, "failed to list billing rates", err)
-		return
-	}
-
-	writeJSON(w, http.StatusOK, map[string]any{"billing_rates": rates})
-}
-
-// Upsert handles PUT /api/billing-rates
-func (h *BillingRateHandler) Upsert(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	var input services.UpsertBillingRateInput
-	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid JSON body")
-		return
-	}
-
-	if input.Rate < 0 {
-		writeError(w, http.StatusBadRequest, "rate must be non-negative")
-		return
-	}
-	if input.ValidFrom == "" {
-		writeError(w, http.StatusBadRequest, "valid_from is required")
-		return
-	}
-
-	rate, err := h.svc.Upsert(r.Context(), tenantID, input)
-	if err != nil {
-		internalError(w, "failed to upsert billing rate", err)
-		return
-	}
-
-	writeJSON(w, http.StatusOK, rate)
-}

backend/internal/handlers/deadlines.go

@@ -198,9 +198,8 @@ func (h *DeadlineHandlers) Delete(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	err = h.deadlines.Delete(r.Context(), tenantID, deadlineID)
+	if err := h.deadlines.Delete(r.Context(), tenantID, deadlineID); err != nil {
-	if err != nil {
+		writeError(w, http.StatusNotFound, "deadline not found")
-		writeError(w, http.StatusNotFound, err.Error())
 		return
 	}
 

backend/internal/handlers/invoices.go

@@ -1,170 +0,0 @@
-package handlers
-
-import (
-	"encoding/json"
-	"net/http"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
-
-	"github.com/google/uuid"
-)
-
-type InvoiceHandler struct {
-	svc *services.InvoiceService
-}
-
-func NewInvoiceHandler(svc *services.InvoiceService) *InvoiceHandler {
-	return &InvoiceHandler{svc: svc}
-}
-
-// List handles GET /api/invoices?case_id=&status=
-func (h *InvoiceHandler) List(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	var caseID *uuid.UUID
-	if caseStr := r.URL.Query().Get("case_id"); caseStr != "" {
-		parsed, err := uuid.Parse(caseStr)
-		if err != nil {
-			writeError(w, http.StatusBadRequest, "invalid case_id")
-			return
-		}
-		caseID = &parsed
-	}
-
-	invoices, err := h.svc.List(r.Context(), tenantID, caseID, r.URL.Query().Get("status"))
-	if err != nil {
-		internalError(w, "failed to list invoices", err)
-		return
-	}
-
-	writeJSON(w, http.StatusOK, map[string]any{"invoices": invoices})
-}
-
-// Get handles GET /api/invoices/{id}
-func (h *InvoiceHandler) Get(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	invoiceID, err := parsePathUUID(r, "id")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid invoice ID")
-		return
-	}
-
-	inv, err := h.svc.GetByID(r.Context(), tenantID, invoiceID)
-	if err != nil {
-		internalError(w, "failed to get invoice", err)
-		return
-	}
-	if inv == nil {
-		writeError(w, http.StatusNotFound, "invoice not found")
-		return
-	}
-
-	writeJSON(w, http.StatusOK, inv)
-}
-
-// Create handles POST /api/invoices
-func (h *InvoiceHandler) Create(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-	userID, _ := auth.UserFromContext(r.Context())
-
-	var input services.CreateInvoiceInput
-	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid JSON body")
-		return
-	}
-
-	if input.ClientName == "" {
-		writeError(w, http.StatusBadRequest, "client_name is required")
-		return
-	}
-	if input.CaseID == uuid.Nil {
-		writeError(w, http.StatusBadRequest, "case_id is required")
-		return
-	}
-
-	inv, err := h.svc.Create(r.Context(), tenantID, userID, input)
-	if err != nil {
-		internalError(w, "failed to create invoice", err)
-		return
-	}
-
-	writeJSON(w, http.StatusCreated, inv)
-}
-
-// Update handles PUT /api/invoices/{id}
-func (h *InvoiceHandler) Update(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	invoiceID, err := parsePathUUID(r, "id")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid invoice ID")
-		return
-	}
-
-	var input services.UpdateInvoiceInput
-	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid JSON body")
-		return
-	}
-
-	inv, err := h.svc.Update(r.Context(), tenantID, invoiceID, input)
-	if err != nil {
-		writeError(w, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	writeJSON(w, http.StatusOK, inv)
-}
-
-// UpdateStatus handles PATCH /api/invoices/{id}/status
-func (h *InvoiceHandler) UpdateStatus(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	invoiceID, err := parsePathUUID(r, "id")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid invoice ID")
-		return
-	}
-
-	var body struct {
-		Status string `json:"status"`
-	}
-	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid JSON body")
-		return
-	}
-	if body.Status == "" {
-		writeError(w, http.StatusBadRequest, "status is required")
-		return
-	}
-
-	inv, err := h.svc.UpdateStatus(r.Context(), tenantID, invoiceID, body.Status)
-	if err != nil {
-		writeError(w, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	writeJSON(w, http.StatusOK, inv)
-}

backend/internal/handlers/templates.go

@@ -0,0 +1,328 @@
+package handlers
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+
+	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
+	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
+)
+
+type TemplateHandler struct {
+	templates *services.TemplateService
+	cases     *services.CaseService
+	parties   *services.PartyService
+	deadlines *services.DeadlineService
+	tenants   *services.TenantService
+}
+
+func NewTemplateHandler(
+	templates *services.TemplateService,
+	cases *services.CaseService,
+	parties *services.PartyService,
+	deadlines *services.DeadlineService,
+	tenants *services.TenantService,
+) *TemplateHandler {
+	return &TemplateHandler{
+		templates: templates,
+		cases:     cases,
+		parties:   parties,
+		deadlines: deadlines,
+		tenants:   tenants,
+	}
+}
+
+// List handles GET /api/templates
+func (h *TemplateHandler) List(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	q := r.URL.Query()
+	limit, _ := strconv.Atoi(q.Get("limit"))
+	offset, _ := strconv.Atoi(q.Get("offset"))
+	limit, offset = clampPagination(limit, offset)
+
+	filter := services.TemplateFilter{
+		Category: q.Get("category"),
+		Search:   q.Get("search"),
+		Limit:    limit,
+		Offset:   offset,
+	}
+
+	if filter.Search != "" {
+		if msg := validateStringLength("search", filter.Search, maxSearchLen); msg != "" {
+			writeError(w, http.StatusBadRequest, msg)
+			return
+		}
+	}
+
+	templates, total, err := h.templates.List(r.Context(), tenantID, filter)
+	if err != nil {
+		internalError(w, "failed to list templates", err)
+		return
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"data":  templates,
+		"total": total,
+	})
+}
+
+// Get handles GET /api/templates/{id}
+func (h *TemplateHandler) Get(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	templateID, err := parsePathUUID(r, "id")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid template ID")
+		return
+	}
+
+	t, err := h.templates.GetByID(r.Context(), tenantID, templateID)
+	if err != nil {
+		internalError(w, "failed to get template", err)
+		return
+	}
+	if t == nil {
+		writeError(w, http.StatusNotFound, "template not found")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, t)
+}
+
+// Create handles POST /api/templates
+func (h *TemplateHandler) Create(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	var raw struct {
+		Name        string  `json:"name"`
+		Description *string `json:"description,omitempty"`
+		Category    string  `json:"category"`
+		Content     string  `json:"content"`
+		Variables   any     `json:"variables,omitempty"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&raw); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if raw.Name == "" {
+		writeError(w, http.StatusBadRequest, "name is required")
+		return
+	}
+	if msg := validateStringLength("name", raw.Name, maxTitleLen); msg != "" {
+		writeError(w, http.StatusBadRequest, msg)
+		return
+	}
+	if raw.Category == "" {
+		writeError(w, http.StatusBadRequest, "category is required")
+		return
+	}
+
+	var variables []byte
+	if raw.Variables != nil {
+		var err error
+		variables, err = json.Marshal(raw.Variables)
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "invalid variables")
+			return
+		}
+	}
+
+	input := services.CreateTemplateInput{
+		Name:        raw.Name,
+		Description: raw.Description,
+		Category:    raw.Category,
+		Content:     raw.Content,
+		Variables:   variables,
+	}
+
+	t, err := h.templates.Create(r.Context(), tenantID, input)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	writeJSON(w, http.StatusCreated, t)
+}
+
+// Update handles PUT /api/templates/{id}
+func (h *TemplateHandler) Update(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	templateID, err := parsePathUUID(r, "id")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid template ID")
+		return
+	}
+
+	var raw struct {
+		Name        *string `json:"name,omitempty"`
+		Description *string `json:"description,omitempty"`
+		Category    *string `json:"category,omitempty"`
+		Content     *string `json:"content,omitempty"`
+		Variables   any     `json:"variables,omitempty"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&raw); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if raw.Name != nil {
+		if msg := validateStringLength("name", *raw.Name, maxTitleLen); msg != "" {
+			writeError(w, http.StatusBadRequest, msg)
+			return
+		}
+	}
+
+	var variables []byte
+	if raw.Variables != nil {
+		variables, err = json.Marshal(raw.Variables)
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "invalid variables")
+			return
+		}
+	}
+
+	input := services.UpdateTemplateInput{
+		Name:        raw.Name,
+		Description: raw.Description,
+		Category:    raw.Category,
+		Content:     raw.Content,
+		Variables:   variables,
+	}
+
+	t, err := h.templates.Update(r.Context(), tenantID, templateID, input)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	if t == nil {
+		writeError(w, http.StatusNotFound, "template not found")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, t)
+}
+
+// Delete handles DELETE /api/templates/{id}
+func (h *TemplateHandler) Delete(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	templateID, err := parsePathUUID(r, "id")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid template ID")
+		return
+	}
+
+	if err := h.templates.Delete(r.Context(), tenantID, templateID); err != nil {
+		writeError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	writeJSON(w, http.StatusOK, map[string]string{"status": "deleted"})
+}
+
+// Render handles POST /api/templates/{id}/render?case_id=X
+func (h *TemplateHandler) Render(w http.ResponseWriter, r *http.Request) {
+	tenantID, ok := auth.TenantFromContext(r.Context())
+	if !ok {
+		writeError(w, http.StatusForbidden, "missing tenant")
+		return
+	}
+
+	userID, _ := auth.UserFromContext(r.Context())
+
+	templateID, err := parsePathUUID(r, "id")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid template ID")
+		return
+	}
+
+	// Get template
+	tmpl, err := h.templates.GetByID(r.Context(), tenantID, templateID)
+	if err != nil {
+		internalError(w, "failed to get template", err)
+		return
+	}
+	if tmpl == nil {
+		writeError(w, http.StatusNotFound, "template not found")
+		return
+	}
+
+	// Build render data
+	data := services.RenderData{}
+
+	// Case data (optional)
+	caseIDStr := r.URL.Query().Get("case_id")
+	if caseIDStr != "" {
+		caseID, err := parseUUID(caseIDStr)
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "invalid case_id")
+			return
+		}
+
+		caseDetail, err := h.cases.GetByID(r.Context(), tenantID, caseID)
+		if err != nil {
+			internalError(w, "failed to get case", err)
+			return
+		}
+		if caseDetail == nil {
+			writeError(w, http.StatusNotFound, "case not found")
+			return
+		}
+		data.Case = &caseDetail.Case
+		data.Parties = caseDetail.Parties
+
+		// Get next upcoming deadline for this case
+		deadlines, err := h.deadlines.ListForCase(tenantID, caseID)
+		if err == nil && len(deadlines) > 0 {
+			// Find next non-completed deadline
+			for i := range deadlines {
+				if deadlines[i].Status != "completed" {
+					data.Deadline = &deadlines[i]
+					break
+				}
+			}
+		}
+	}
+
+	// Tenant data
+	tenant, err := h.tenants.GetByID(r.Context(), tenantID)
+	if err == nil && tenant != nil {
+		data.Tenant = tenant
+	}
+
+	// User data (userID from context — detailed name/email would need a user table lookup)
+	data.UserName = userID.String()
+	data.UserEmail = ""
+
+	rendered := h.templates.Render(tmpl, data)
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"content":     rendered,
+		"template_id": tmpl.ID,
+		"name":        tmpl.Name,
+	})
+}

backend/internal/handlers/time_entries.go

@@ -1,209 +0,0 @@
-package handlers
-
-import (
-	"encoding/json"
-	"net/http"
-	"strconv"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"
-
-	"github.com/google/uuid"
-)
-
-type TimeEntryHandler struct {
-	svc *services.TimeEntryService
-}
-
-func NewTimeEntryHandler(svc *services.TimeEntryService) *TimeEntryHandler {
-	return &TimeEntryHandler{svc: svc}
-}
-
-// ListForCase handles GET /api/cases/{id}/time-entries
-func (h *TimeEntryHandler) ListForCase(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, "id")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid case ID")
-		return
-	}
-
-	entries, err := h.svc.ListForCase(r.Context(), tenantID, caseID)
-	if err != nil {
-		internalError(w, "failed to list time entries", err)
-		return
-	}
-
-	writeJSON(w, http.StatusOK, map[string]any{"time_entries": entries})
-}
-
-// List handles GET /api/time-entries?case_id=&user_id=&from=&to=
-func (h *TimeEntryHandler) List(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
-	offset, _ := strconv.Atoi(r.URL.Query().Get("offset"))
-	limit, offset = clampPagination(limit, offset)
-
-	filter := services.TimeEntryFilter{
-		From:   r.URL.Query().Get("from"),
-		To:     r.URL.Query().Get("to"),
-		Limit:  limit,
-		Offset: offset,
-	}
-
-	if caseStr := r.URL.Query().Get("case_id"); caseStr != "" {
-		caseID, err := uuid.Parse(caseStr)
-		if err != nil {
-			writeError(w, http.StatusBadRequest, "invalid case_id")
-			return
-		}
-		filter.CaseID = &caseID
-	}
-	if userStr := r.URL.Query().Get("user_id"); userStr != "" {
-		userID, err := uuid.Parse(userStr)
-		if err != nil {
-			writeError(w, http.StatusBadRequest, "invalid user_id")
-			return
-		}
-		filter.UserID = &userID
-	}
-
-	entries, total, err := h.svc.List(r.Context(), tenantID, filter)
-	if err != nil {
-		internalError(w, "failed to list time entries", err)
-		return
-	}
-
-	writeJSON(w, http.StatusOK, map[string]any{
-		"time_entries": entries,
-		"total":        total,
-	})
-}
-
-// Create handles POST /api/cases/{id}/time-entries
-func (h *TimeEntryHandler) Create(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-	userID, _ := auth.UserFromContext(r.Context())
-
-	caseID, err := parsePathUUID(r, "id")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid case ID")
-		return
-	}
-
-	var input services.CreateTimeEntryInput
-	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid JSON body")
-		return
-	}
-	input.CaseID = caseID
-
-	if input.Description == "" {
-		writeError(w, http.StatusBadRequest, "description is required")
-		return
-	}
-	if input.DurationMinutes <= 0 {
-		writeError(w, http.StatusBadRequest, "duration_minutes must be positive")
-		return
-	}
-	if input.Date == "" {
-		writeError(w, http.StatusBadRequest, "date is required")
-		return
-	}
-
-	entry, err := h.svc.Create(r.Context(), tenantID, userID, input)
-	if err != nil {
-		internalError(w, "failed to create time entry", err)
-		return
-	}
-
-	writeJSON(w, http.StatusCreated, entry)
-}
-
-// Update handles PUT /api/time-entries/{id}
-func (h *TimeEntryHandler) Update(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	entryID, err := parsePathUUID(r, "id")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid time entry ID")
-		return
-	}
-
-	var input services.UpdateTimeEntryInput
-	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid JSON body")
-		return
-	}
-
-	entry, err := h.svc.Update(r.Context(), tenantID, entryID, input)
-	if err != nil {
-		writeError(w, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	writeJSON(w, http.StatusOK, entry)
-}
-
-// Delete handles DELETE /api/time-entries/{id}
-func (h *TimeEntryHandler) Delete(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	entryID, err := parsePathUUID(r, "id")
-	if err != nil {
-		writeError(w, http.StatusBadRequest, "invalid time entry ID")
-		return
-	}
-
-	if err := h.svc.Delete(r.Context(), tenantID, entryID); err != nil {
-		writeError(w, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	writeJSON(w, http.StatusOK, map[string]string{"status": "deleted"})
-}
-
-// Summary handles GET /api/time-entries/summary?group_by=case|user|month&from=&to=
-func (h *TimeEntryHandler) Summary(w http.ResponseWriter, r *http.Request) {
-	tenantID, ok := auth.TenantFromContext(r.Context())
-	if !ok {
-		writeError(w, http.StatusForbidden, "missing tenant")
-		return
-	}
-
-	groupBy := r.URL.Query().Get("group_by")
-	if groupBy == "" {
-		groupBy = "case"
-	}
-
-	summaries, err := h.svc.Summary(r.Context(), tenantID, groupBy,
-		r.URL.Query().Get("from"), r.URL.Query().Get("to"))
-	if err != nil {
-		internalError(w, "failed to get summary", err)
-		return
-	}
-
-	writeJSON(w, http.StatusOK, map[string]any{"summary": summaries})
-}

backend/internal/models/billing_rate.go

@@ -1,18 +0,0 @@
-package models
-
-import (
-	"time"
-
-	"github.com/google/uuid"
-)
-
-type BillingRate struct {
-	ID        uuid.UUID  `db:"id" json:"id"`
-	TenantID  uuid.UUID  `db:"tenant_id" json:"tenant_id"`
-	UserID    *uuid.UUID `db:"user_id" json:"user_id,omitempty"`
-	Rate      float64    `db:"rate" json:"rate"`
-	Currency  string     `db:"currency" json:"currency"`
-	ValidFrom string     `db:"valid_from" json:"valid_from"`
-	ValidTo   *string    `db:"valid_to" json:"valid_to,omitempty"`
-	CreatedAt time.Time  `db:"created_at" json:"created_at"`
-}

backend/internal/models/document_template.go

@@ -0,0 +1,21 @@
+package models
+
+import (
+	"encoding/json"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+type DocumentTemplate struct {
+	ID          uuid.UUID       `db:"id" json:"id"`
+	TenantID    *uuid.UUID      `db:"tenant_id" json:"tenant_id,omitempty"`
+	Name        string          `db:"name" json:"name"`
+	Description *string         `db:"description" json:"description,omitempty"`
+	Category    string          `db:"category" json:"category"`
+	Content     string          `db:"content" json:"content"`
+	Variables   json.RawMessage `db:"variables" json:"variables"`
+	IsSystem    bool            `db:"is_system" json:"is_system"`
+	CreatedAt   time.Time       `db:"created_at" json:"created_at"`
+	UpdatedAt   time.Time       `db:"updated_at" json:"updated_at"`
+}

backend/internal/models/invoice.go

@@ -1,38 +0,0 @@
-package models
-
-import (
-	"encoding/json"
-	"time"
-
-	"github.com/google/uuid"
-)
-
-type Invoice struct {
-	ID            uuid.UUID       `db:"id" json:"id"`
-	TenantID      uuid.UUID       `db:"tenant_id" json:"tenant_id"`
-	CaseID        uuid.UUID       `db:"case_id" json:"case_id"`
-	InvoiceNumber string          `db:"invoice_number" json:"invoice_number"`
-	ClientName    string          `db:"client_name" json:"client_name"`
-	ClientAddress *string         `db:"client_address" json:"client_address,omitempty"`
-	Items         json.RawMessage `db:"items" json:"items"`
-	Subtotal      float64         `db:"subtotal" json:"subtotal"`
-	TaxRate       float64         `db:"tax_rate" json:"tax_rate"`
-	TaxAmount     float64         `db:"tax_amount" json:"tax_amount"`
-	Total         float64         `db:"total" json:"total"`
-	Status        string          `db:"status" json:"status"`
-	IssuedAt      *string         `db:"issued_at" json:"issued_at,omitempty"`
-	DueAt         *string         `db:"due_at" json:"due_at,omitempty"`
-	PaidAt        *time.Time      `db:"paid_at" json:"paid_at,omitempty"`
-	Notes         *string         `db:"notes" json:"notes,omitempty"`
-	CreatedBy     uuid.UUID       `db:"created_by" json:"created_by"`
-	CreatedAt     time.Time       `db:"created_at" json:"created_at"`
-	UpdatedAt     time.Time       `db:"updated_at" json:"updated_at"`
-}
-
-type InvoiceItem struct {
-	Description     string  `json:"description"`
-	DurationMinutes int     `json:"duration_minutes,omitempty"`
-	HourlyRate      float64 `json:"hourly_rate,omitempty"`
-	Amount          float64 `json:"amount"`
-	TimeEntryID     *string `json:"time_entry_id,omitempty"`
-}

backend/internal/models/time_entry.go

@@ -1,24 +0,0 @@
-package models
-
-import (
-	"time"
-
-	"github.com/google/uuid"
-)
-
-type TimeEntry struct {
-	ID              uuid.UUID  `db:"id" json:"id"`
-	TenantID        uuid.UUID  `db:"tenant_id" json:"tenant_id"`
-	CaseID          uuid.UUID  `db:"case_id" json:"case_id"`
-	UserID          uuid.UUID  `db:"user_id" json:"user_id"`
-	Date            string     `db:"date" json:"date"`
-	DurationMinutes int        `db:"duration_minutes" json:"duration_minutes"`
-	Description     string     `db:"description" json:"description"`
-	Activity        *string    `db:"activity" json:"activity,omitempty"`
-	Billable        bool       `db:"billable" json:"billable"`
-	Billed          bool       `db:"billed" json:"billed"`
-	InvoiceID       *uuid.UUID `db:"invoice_id" json:"invoice_id,omitempty"`
-	HourlyRate      *float64   `db:"hourly_rate" json:"hourly_rate,omitempty"`
-	CreatedAt       time.Time  `db:"created_at" json:"created_at"`
-	UpdatedAt       time.Time  `db:"updated_at" json:"updated_at"`
-}

backend/internal/router/router.go

@@ -31,9 +31,7 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	storageCli := services.NewStorageClient(cfg.SupabaseURL, cfg.SupabaseServiceKey)
 	documentSvc := services.NewDocumentService(db, storageCli, auditSvc)
 	assignmentSvc := services.NewCaseAssignmentService(db)
-	timeEntrySvc := services.NewTimeEntryService(db, auditSvc)
+	templateSvc := services.NewTemplateService(db, auditSvc)
-	billingRateSvc := services.NewBillingRateService(db, auditSvc)
-	invoiceSvc := services.NewInvoiceService(db, auditSvc)
 
 	// AI service (optional — only if API key is configured)
 	var aiH *handlers.AIHandler
@@ -68,9 +66,7 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	eventH := handlers.NewCaseEventHandler(db)
 	docH := handlers.NewDocumentHandler(documentSvc)
 	assignmentH := handlers.NewCaseAssignmentHandler(assignmentSvc)
-	timeEntryH := handlers.NewTimeEntryHandler(timeEntrySvc)
+	templateH := handlers.NewTemplateHandler(templateSvc, caseSvc, partySvc, deadlineSvc, tenantSvc)
-	billingRateH := handlers.NewBillingRateHandler(billingRateSvc)
-	invoiceH := handlers.NewInvoiceHandler(invoiceSvc)
 
 	// Public routes
 	mux.HandleFunc("GET /health", handleHealth(db))
@@ -138,7 +134,7 @@ 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)
 
-	// Appointments — all can manage (PermManageAppointments granted to all)
+	// Appointments — all can manage
 	scoped.HandleFunc("GET /api/appointments/{id}", apptH.Get)
 	scoped.HandleFunc("GET /api/appointments", apptH.List)
 	scoped.HandleFunc("POST /api/appointments", perm(auth.PermManageAppointments, apptH.Create))
@@ -162,16 +158,24 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 	// Dashboard — all can view
 	scoped.HandleFunc("GET /api/dashboard", dashboardH.Get)
 
-	// Audit log — view requires PermViewAuditLog
+	// Audit log
-	scoped.HandleFunc("GET /api/audit-log", perm(auth.PermViewAuditLog, auditH.List))
+	scoped.HandleFunc("GET /api/audit-log", auditH.List)
 
-	// Documents — all can upload, delete checked in handler (own vs all)
+	// Documents — all can upload, delete checked in handler
 	scoped.HandleFunc("GET /api/cases/{id}/documents", docH.ListByCase)
 	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)
 
+	// Document templates — all can view, create/edit needs PermCreateCase
+	scoped.HandleFunc("GET /api/templates", templateH.List)
+	scoped.HandleFunc("GET /api/templates/{id}", templateH.Get)
+	scoped.HandleFunc("POST /api/templates", perm(auth.PermCreateCase, templateH.Create))
+	scoped.HandleFunc("PUT /api/templates/{id}", perm(auth.PermCreateCase, templateH.Update))
+	scoped.HandleFunc("DELETE /api/templates/{id}", perm(auth.PermCreateCase, templateH.Delete))
+	scoped.HandleFunc("POST /api/templates/{id}/render", templateH.Render)
+
 	// AI endpoints (rate limited: 5 req/min burst 10 per IP)
 	if aiH != nil {
 		aiLimiter := middleware.NewTokenBucket(5.0/60.0, 10)
@@ -189,32 +193,13 @@ func New(db *sqlx.DB, authMW *auth.Middleware, cfg *config.Config, calDAVSvc *se
 		scoped.HandleFunc("PUT /api/notification-preferences", notifH.UpdatePreferences)
 	}
 
-	// CalDAV sync endpoints — settings permission required
+	// CalDAV sync endpoints
 	if calDAVSvc != nil {
 		calDAVH := handlers.NewCalDAVHandler(calDAVSvc)
 		scoped.HandleFunc("POST /api/caldav/sync", perm(auth.PermManageSettings, calDAVH.TriggerSync))
 		scoped.HandleFunc("GET /api/caldav/status", calDAVH.GetStatus)
 	}
 
-	// Time entries — billing permission for create/update/delete
-	scoped.HandleFunc("GET /api/cases/{id}/time-entries", timeEntryH.ListForCase)
-	scoped.HandleFunc("POST /api/cases/{id}/time-entries", perm(auth.PermManageBilling, timeEntryH.Create))
-	scoped.HandleFunc("GET /api/time-entries", timeEntryH.List)
-	scoped.HandleFunc("GET /api/time-entries/summary", perm(auth.PermManageBilling, timeEntryH.Summary))
-	scoped.HandleFunc("PUT /api/time-entries/{id}", perm(auth.PermManageBilling, timeEntryH.Update))
-	scoped.HandleFunc("DELETE /api/time-entries/{id}", perm(auth.PermManageBilling, timeEntryH.Delete))
-
-	// Billing rates — billing permission required
-	scoped.HandleFunc("GET /api/billing-rates", perm(auth.PermManageBilling, billingRateH.List))
-	scoped.HandleFunc("PUT /api/billing-rates", perm(auth.PermManageBilling, billingRateH.Upsert))
-
-	// Invoices — billing permission required
-	scoped.HandleFunc("GET /api/invoices", perm(auth.PermManageBilling, invoiceH.List))
-	scoped.HandleFunc("POST /api/invoices", perm(auth.PermManageBilling, invoiceH.Create))
-	scoped.HandleFunc("GET /api/invoices/{id}", perm(auth.PermManageBilling, invoiceH.Get))
-	scoped.HandleFunc("PUT /api/invoices/{id}", perm(auth.PermManageBilling, invoiceH.Update))
-	scoped.HandleFunc("PATCH /api/invoices/{id}/status", perm(auth.PermManageBilling, invoiceH.UpdateStatus))
-
 	// Wire: auth -> tenant routes go directly, scoped routes get tenant resolver
 	api.Handle("/api/", tenantResolver.Resolve(scoped))
 

backend/internal/services/billing_rate_service.go

@@ -1,88 +0,0 @@
-package services
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/google/uuid"
-	"github.com/jmoiron/sqlx"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/models"
-)
-
-type BillingRateService struct {
-	db    *sqlx.DB
-	audit *AuditService
-}
-
-func NewBillingRateService(db *sqlx.DB, audit *AuditService) *BillingRateService {
-	return &BillingRateService{db: db, audit: audit}
-}
-
-type UpsertBillingRateInput struct {
-	UserID    *uuid.UUID `json:"user_id,omitempty"`
-	Rate      float64    `json:"rate"`
-	Currency  string     `json:"currency"`
-	ValidFrom string     `json:"valid_from"`
-	ValidTo   *string    `json:"valid_to,omitempty"`
-}
-
-func (s *BillingRateService) List(ctx context.Context, tenantID uuid.UUID) ([]models.BillingRate, error) {
-	var rates []models.BillingRate
-	err := s.db.SelectContext(ctx, &rates,
-		`SELECT id, tenant_id, user_id, rate, currency, valid_from, valid_to, created_at
-		 FROM billing_rates
-		 WHERE tenant_id = $1
-		 ORDER BY valid_from DESC, user_id NULLS LAST`,
-		tenantID)
-	if err != nil {
-		return nil, fmt.Errorf("list billing rates: %w", err)
-	}
-	return rates, nil
-}
-
-func (s *BillingRateService) Upsert(ctx context.Context, tenantID uuid.UUID, input UpsertBillingRateInput) (*models.BillingRate, error) {
-	if input.Currency == "" {
-		input.Currency = "EUR"
-	}
-
-	// Close any existing open-ended rate for this user
-	_, err := s.db.ExecContext(ctx,
-		`UPDATE billing_rates SET valid_to = $3
-		 WHERE tenant_id = $1
-		 AND (($2::uuid IS NULL AND user_id IS NULL) OR user_id = $2)
-		 AND valid_to IS NULL
-		 AND valid_from < $3`,
-		tenantID, input.UserID, input.ValidFrom)
-	if err != nil {
-		return nil, fmt.Errorf("close existing rate: %w", err)
-	}
-
-	var rate models.BillingRate
-	err = s.db.QueryRowxContext(ctx,
-		`INSERT INTO billing_rates (tenant_id, user_id, rate, currency, valid_from, valid_to)
-		 VALUES ($1, $2, $3, $4, $5, $6)
-		 RETURNING id, tenant_id, user_id, rate, currency, valid_from, valid_to, created_at`,
-		tenantID, input.UserID, input.Rate, input.Currency, input.ValidFrom, input.ValidTo,
-	).StructScan(&rate)
-	if err != nil {
-		return nil, fmt.Errorf("upsert billing rate: %w", err)
-	}
-
-	s.audit.Log(ctx, "create", "billing_rate", &rate.ID, nil, rate)
-	return &rate, nil
-}
-
-func (s *BillingRateService) GetCurrentRate(ctx context.Context, tenantID uuid.UUID, userID uuid.UUID, date string) (*float64, error) {
-	var rate float64
-	err := s.db.GetContext(ctx, &rate,
-		`SELECT rate FROM billing_rates
-		 WHERE tenant_id = $1 AND (user_id = $2 OR user_id IS NULL)
-		 AND valid_from <= $3 AND (valid_to IS NULL OR valid_to >= $3)
-		 ORDER BY user_id NULLS LAST LIMIT 1`,
-		tenantID, userID, date)
-	if err != nil {
-		return nil, err
-	}
-	return &rate, nil
-}

backend/internal/services/invoice_service.go

@@ -1,292 +0,0 @@
-package services
-
-import (
-	"context"
-	"database/sql"
-	"encoding/json"
-	"fmt"
-	"time"
-
-	"github.com/google/uuid"
-	"github.com/jmoiron/sqlx"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/models"
-)
-
-type InvoiceService struct {
-	db    *sqlx.DB
-	audit *AuditService
-}
-
-func NewInvoiceService(db *sqlx.DB, audit *AuditService) *InvoiceService {
-	return &InvoiceService{db: db, audit: audit}
-}
-
-type CreateInvoiceInput struct {
-	CaseID        uuid.UUID             `json:"case_id"`
-	ClientName    string                `json:"client_name"`
-	ClientAddress *string               `json:"client_address,omitempty"`
-	Items         []models.InvoiceItem  `json:"items"`
-	TaxRate       *float64              `json:"tax_rate,omitempty"`
-	IssuedAt      *string               `json:"issued_at,omitempty"`
-	DueAt         *string               `json:"due_at,omitempty"`
-	Notes         *string               `json:"notes,omitempty"`
-	TimeEntryIDs  []uuid.UUID           `json:"time_entry_ids,omitempty"`
-}
-
-type UpdateInvoiceInput struct {
-	ClientName    *string               `json:"client_name,omitempty"`
-	ClientAddress *string               `json:"client_address,omitempty"`
-	Items         []models.InvoiceItem  `json:"items,omitempty"`
-	TaxRate       *float64              `json:"tax_rate,omitempty"`
-	IssuedAt      *string               `json:"issued_at,omitempty"`
-	DueAt         *string               `json:"due_at,omitempty"`
-	Notes         *string               `json:"notes,omitempty"`
-}
-
-const invoiceCols = `id, tenant_id, case_id, invoice_number, client_name, client_address,
-	items, subtotal, tax_rate, tax_amount, total, status, issued_at, due_at, paid_at, notes,
-	created_by, created_at, updated_at`
-
-func (s *InvoiceService) List(ctx context.Context, tenantID uuid.UUID, caseID *uuid.UUID, status string) ([]models.Invoice, error) {
-	where := "WHERE tenant_id = $1"
-	args := []any{tenantID}
-	argIdx := 2
-
-	if caseID != nil {
-		where += fmt.Sprintf(" AND case_id = $%d", argIdx)
-		args = append(args, *caseID)
-		argIdx++
-	}
-	if status != "" {
-		where += fmt.Sprintf(" AND status = $%d", argIdx)
-		args = append(args, status)
-		argIdx++
-	}
-
-	var invoices []models.Invoice
-	err := s.db.SelectContext(ctx, &invoices,
-		fmt.Sprintf("SELECT %s FROM invoices %s ORDER BY created_at DESC", invoiceCols, where),
-		args...)
-	if err != nil {
-		return nil, fmt.Errorf("list invoices: %w", err)
-	}
-	return invoices, nil
-}
-
-func (s *InvoiceService) GetByID(ctx context.Context, tenantID, invoiceID uuid.UUID) (*models.Invoice, error) {
-	var inv models.Invoice
-	err := s.db.GetContext(ctx, &inv,
-		`SELECT `+invoiceCols+` FROM invoices WHERE tenant_id = $1 AND id = $2`,
-		tenantID, invoiceID)
-	if err == sql.ErrNoRows {
-		return nil, nil
-	}
-	if err != nil {
-		return nil, fmt.Errorf("get invoice: %w", err)
-	}
-	return &inv, nil
-}
-
-func (s *InvoiceService) Create(ctx context.Context, tenantID, userID uuid.UUID, input CreateInvoiceInput) (*models.Invoice, error) {
-	tx, err := s.db.BeginTxx(ctx, nil)
-	if err != nil {
-		return nil, fmt.Errorf("begin tx: %w", err)
-	}
-	defer tx.Rollback()
-
-	// Generate invoice number: RE-YYYY-NNN
-	year := time.Now().Year()
-	var seq int
-	err = tx.GetContext(ctx, &seq,
-		`SELECT COUNT(*) + 1 FROM invoices WHERE tenant_id = $1 AND invoice_number LIKE $2`,
-		tenantID, fmt.Sprintf("RE-%d-%%", year))
-	if err != nil {
-		return nil, fmt.Errorf("generate invoice number: %w", err)
-	}
-	invoiceNumber := fmt.Sprintf("RE-%d-%03d", year, seq)
-
-	// Calculate totals
-	taxRate := 19.00
-	if input.TaxRate != nil {
-		taxRate = *input.TaxRate
-	}
-
-	var subtotal float64
-	for _, item := range input.Items {
-		subtotal += item.Amount
-	}
-	taxAmount := subtotal * taxRate / 100
-	total := subtotal + taxAmount
-
-	itemsJSON, err := json.Marshal(input.Items)
-	if err != nil {
-		return nil, fmt.Errorf("marshal items: %w", err)
-	}
-
-	var inv models.Invoice
-	err = tx.QueryRowxContext(ctx,
-		`INSERT INTO invoices (tenant_id, case_id, invoice_number, client_name, client_address,
-			items, subtotal, tax_rate, tax_amount, total, issued_at, due_at, notes, created_by)
-		 VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14)
-		 RETURNING `+invoiceCols,
-		tenantID, input.CaseID, invoiceNumber, input.ClientName, input.ClientAddress,
-		itemsJSON, subtotal, taxRate, taxAmount, total, input.IssuedAt, input.DueAt, input.Notes, userID,
-	).StructScan(&inv)
-	if err != nil {
-		return nil, fmt.Errorf("create invoice: %w", err)
-	}
-
-	// Mark linked time entries as billed
-	if len(input.TimeEntryIDs) > 0 {
-		query, args, err := sqlx.In(
-			`UPDATE time_entries SET billed = true, invoice_id = ? WHERE tenant_id = ? AND id IN (?)`,
-			inv.ID, tenantID, input.TimeEntryIDs)
-		if err != nil {
-			return nil, fmt.Errorf("build time entry update: %w", err)
-		}
-		query = tx.Rebind(query)
-		_, err = tx.ExecContext(ctx, query, args...)
-		if err != nil {
-			return nil, fmt.Errorf("mark time entries billed: %w", err)
-		}
-	}
-
-	if err := tx.Commit(); err != nil {
-		return nil, fmt.Errorf("commit: %w", err)
-	}
-
-	s.audit.Log(ctx, "create", "invoice", &inv.ID, nil, inv)
-	return &inv, nil
-}
-
-func (s *InvoiceService) Update(ctx context.Context, tenantID, invoiceID uuid.UUID, input UpdateInvoiceInput) (*models.Invoice, error) {
-	old, err := s.GetByID(ctx, tenantID, invoiceID)
-	if err != nil {
-		return nil, err
-	}
-	if old == nil {
-		return nil, fmt.Errorf("invoice not found")
-	}
-	if old.Status != "draft" {
-		return nil, fmt.Errorf("can only update draft invoices")
-	}
-
-	// Recalculate totals if items changed
-	var itemsJSON json.RawMessage
-	var subtotal float64
-	taxRate := old.TaxRate
-
-	if input.Items != nil {
-		for _, item := range input.Items {
-			subtotal += item.Amount
-		}
-		itemsJSON, _ = json.Marshal(input.Items)
-	}
-	if input.TaxRate != nil {
-		taxRate = *input.TaxRate
-	}
-
-	if input.Items != nil {
-		taxAmount := subtotal * taxRate / 100
-		total := subtotal + taxAmount
-
-		var inv models.Invoice
-		err = s.db.QueryRowxContext(ctx,
-			`UPDATE invoices SET
-				client_name = COALESCE($3, client_name),
-				client_address = COALESCE($4, client_address),
-				items = $5,
-				subtotal = $6,
-				tax_rate = $7,
-				tax_amount = $8,
-				total = $9,
-				issued_at = COALESCE($10, issued_at),
-				due_at = COALESCE($11, due_at),
-				notes = COALESCE($12, notes),
-				updated_at = now()
-			 WHERE tenant_id = $1 AND id = $2
-			 RETURNING `+invoiceCols,
-			tenantID, invoiceID, input.ClientName, input.ClientAddress,
-			itemsJSON, subtotal, taxRate, subtotal*taxRate/100, total,
-			input.IssuedAt, input.DueAt, input.Notes,
-		).StructScan(&inv)
-		if err != nil {
-			return nil, fmt.Errorf("update invoice: %w", err)
-		}
-		s.audit.Log(ctx, "update", "invoice", &inv.ID, old, inv)
-		return &inv, nil
-	}
-
-	// Update without changing items
-	var inv models.Invoice
-	err = s.db.QueryRowxContext(ctx,
-		`UPDATE invoices SET
-			client_name = COALESCE($3, client_name),
-			client_address = COALESCE($4, client_address),
-			tax_rate = COALESCE($5, tax_rate),
-			issued_at = COALESCE($6, issued_at),
-			due_at = COALESCE($7, due_at),
-			notes = COALESCE($8, notes),
-			updated_at = now()
-		 WHERE tenant_id = $1 AND id = $2
-		 RETURNING `+invoiceCols,
-		tenantID, invoiceID, input.ClientName, input.ClientAddress,
-		input.TaxRate, input.IssuedAt, input.DueAt, input.Notes,
-	).StructScan(&inv)
-	if err != nil {
-		return nil, fmt.Errorf("update invoice: %w", err)
-	}
-
-	s.audit.Log(ctx, "update", "invoice", &inv.ID, old, inv)
-	return &inv, nil
-}
-
-func (s *InvoiceService) UpdateStatus(ctx context.Context, tenantID, invoiceID uuid.UUID, newStatus string) (*models.Invoice, error) {
-	old, err := s.GetByID(ctx, tenantID, invoiceID)
-	if err != nil {
-		return nil, err
-	}
-	if old == nil {
-		return nil, fmt.Errorf("invoice not found")
-	}
-
-	// Validate transitions
-	validTransitions := map[string][]string{
-		"draft":     {"sent", "cancelled"},
-		"sent":      {"paid", "cancelled"},
-		"paid":      {},
-		"cancelled": {},
-	}
-	allowed := validTransitions[old.Status]
-	valid := false
-	for _, s := range allowed {
-		if s == newStatus {
-			valid = true
-			break
-		}
-	}
-	if !valid {
-		return nil, fmt.Errorf("invalid status transition from %s to %s", old.Status, newStatus)
-	}
-
-	var paidAt *time.Time
-	if newStatus == "paid" {
-		now := time.Now()
-		paidAt = &now
-	}
-
-	var inv models.Invoice
-	err = s.db.QueryRowxContext(ctx,
-		`UPDATE invoices SET status = $3, paid_at = COALESCE($4, paid_at), updated_at = now()
-		 WHERE tenant_id = $1 AND id = $2
-		 RETURNING `+invoiceCols,
-		tenantID, invoiceID, newStatus, paidAt,
-	).StructScan(&inv)
-	if err != nil {
-		return nil, fmt.Errorf("update invoice status: %w", err)
-	}
-
-	s.audit.Log(ctx, "update", "invoice", &inv.ID, old, inv)
-	return &inv, nil
-}

backend/internal/services/template_service.go

@@ -0,0 +1,330 @@
+package services
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/jmoiron/sqlx"
+
+	"mgit.msbls.de/m/KanzlAI-mGMT/internal/models"
+)
+
+type TemplateService struct {
+	db    *sqlx.DB
+	audit *AuditService
+}
+
+func NewTemplateService(db *sqlx.DB, audit *AuditService) *TemplateService {
+	return &TemplateService{db: db, audit: audit}
+}
+
+type TemplateFilter struct {
+	Category string
+	Search   string
+	Limit    int
+	Offset   int
+}
+
+type CreateTemplateInput struct {
+	Name        string  `json:"name"`
+	Description *string `json:"description,omitempty"`
+	Category    string  `json:"category"`
+	Content     string  `json:"content"`
+	Variables   []byte  `json:"variables,omitempty"`
+}
+
+type UpdateTemplateInput struct {
+	Name        *string `json:"name,omitempty"`
+	Description *string `json:"description,omitempty"`
+	Category    *string `json:"category,omitempty"`
+	Content     *string `json:"content,omitempty"`
+	Variables   []byte  `json:"variables,omitempty"`
+}
+
+var validCategories = map[string]bool{
+	"schriftsatz":    true,
+	"vertrag":        true,
+	"korrespondenz":  true,
+	"intern":         true,
+}
+
+func (s *TemplateService) List(ctx context.Context, tenantID uuid.UUID, filter TemplateFilter) ([]models.DocumentTemplate, int, error) {
+	if filter.Limit <= 0 {
+		filter.Limit = 50
+	}
+	if filter.Limit > 100 {
+		filter.Limit = 100
+	}
+
+	// Show system templates + tenant's own templates
+	where := "WHERE (tenant_id = $1 OR is_system = true)"
+	args := []any{tenantID}
+	argIdx := 2
+
+	if filter.Category != "" {
+		where += fmt.Sprintf(" AND category = $%d", argIdx)
+		args = append(args, filter.Category)
+		argIdx++
+	}
+	if filter.Search != "" {
+		where += fmt.Sprintf(" AND (name ILIKE $%d OR description ILIKE $%d)", argIdx, argIdx)
+		args = append(args, "%"+filter.Search+"%")
+		argIdx++
+	}
+
+	var total int
+	countQ := "SELECT COUNT(*) FROM document_templates " + where
+	if err := s.db.GetContext(ctx, &total, countQ, args...); err != nil {
+		return nil, 0, fmt.Errorf("counting templates: %w", err)
+	}
+
+	query := "SELECT * FROM document_templates " + where + " ORDER BY is_system DESC, name ASC"
+	query += fmt.Sprintf(" LIMIT $%d OFFSET $%d", argIdx, argIdx+1)
+	args = append(args, filter.Limit, filter.Offset)
+
+	var templates []models.DocumentTemplate
+	if err := s.db.SelectContext(ctx, &templates, query, args...); err != nil {
+		return nil, 0, fmt.Errorf("listing templates: %w", err)
+	}
+
+	return templates, total, nil
+}
+
+func (s *TemplateService) GetByID(ctx context.Context, tenantID, templateID uuid.UUID) (*models.DocumentTemplate, error) {
+	var t models.DocumentTemplate
+	err := s.db.GetContext(ctx, &t,
+		"SELECT * FROM document_templates WHERE id = $1 AND (tenant_id = $2 OR is_system = true)",
+		templateID, tenantID)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, fmt.Errorf("getting template: %w", err)
+	}
+	return &t, nil
+}
+
+func (s *TemplateService) Create(ctx context.Context, tenantID uuid.UUID, input CreateTemplateInput) (*models.DocumentTemplate, error) {
+	if input.Name == "" {
+		return nil, fmt.Errorf("name is required")
+	}
+	if !validCategories[input.Category] {
+		return nil, fmt.Errorf("invalid category: %s", input.Category)
+	}
+
+	variables := input.Variables
+	if variables == nil {
+		variables = []byte("[]")
+	}
+
+	var t models.DocumentTemplate
+	err := s.db.GetContext(ctx, &t,
+		`INSERT INTO document_templates (tenant_id, name, description, category, content, variables, is_system)
+		 VALUES ($1, $2, $3, $4, $5, $6, false)
+		 RETURNING *`,
+		tenantID, input.Name, input.Description, input.Category, input.Content, variables)
+	if err != nil {
+		return nil, fmt.Errorf("creating template: %w", err)
+	}
+
+	s.audit.Log(ctx, "create", "document_template", &t.ID, nil, t)
+	return &t, nil
+}
+
+func (s *TemplateService) Update(ctx context.Context, tenantID, templateID uuid.UUID, input UpdateTemplateInput) (*models.DocumentTemplate, error) {
+	// Don't allow editing system templates
+	existing, err := s.GetByID(ctx, tenantID, templateID)
+	if err != nil {
+		return nil, err
+	}
+	if existing == nil {
+		return nil, nil
+	}
+	if existing.IsSystem {
+		return nil, fmt.Errorf("system templates cannot be edited")
+	}
+	if existing.TenantID == nil || *existing.TenantID != tenantID {
+		return nil, fmt.Errorf("template does not belong to tenant")
+	}
+
+	sets := []string{}
+	args := []any{}
+	argIdx := 1
+
+	if input.Name != nil {
+		sets = append(sets, fmt.Sprintf("name = $%d", argIdx))
+		args = append(args, *input.Name)
+		argIdx++
+	}
+	if input.Description != nil {
+		sets = append(sets, fmt.Sprintf("description = $%d", argIdx))
+		args = append(args, *input.Description)
+		argIdx++
+	}
+	if input.Category != nil {
+		if !validCategories[*input.Category] {
+			return nil, fmt.Errorf("invalid category: %s", *input.Category)
+		}
+		sets = append(sets, fmt.Sprintf("category = $%d", argIdx))
+		args = append(args, *input.Category)
+		argIdx++
+	}
+	if input.Content != nil {
+		sets = append(sets, fmt.Sprintf("content = $%d", argIdx))
+		args = append(args, *input.Content)
+		argIdx++
+	}
+	if input.Variables != nil {
+		sets = append(sets, fmt.Sprintf("variables = $%d", argIdx))
+		args = append(args, input.Variables)
+		argIdx++
+	}
+
+	if len(sets) == 0 {
+		return existing, nil
+	}
+
+	sets = append(sets, "updated_at = now()")
+	query := fmt.Sprintf("UPDATE document_templates SET %s WHERE id = $%d AND tenant_id = $%d RETURNING *",
+		strings.Join(sets, ", "), argIdx, argIdx+1)
+	args = append(args, templateID, tenantID)
+
+	var t models.DocumentTemplate
+	if err := s.db.GetContext(ctx, &t, query, args...); err != nil {
+		return nil, fmt.Errorf("updating template: %w", err)
+	}
+
+	s.audit.Log(ctx, "update", "document_template", &t.ID, existing, t)
+	return &t, nil
+}
+
+func (s *TemplateService) Delete(ctx context.Context, tenantID, templateID uuid.UUID) error {
+	// Don't allow deleting system templates
+	existing, err := s.GetByID(ctx, tenantID, templateID)
+	if err != nil {
+		return err
+	}
+	if existing == nil {
+		return fmt.Errorf("template not found")
+	}
+	if existing.IsSystem {
+		return fmt.Errorf("system templates cannot be deleted")
+	}
+	if existing.TenantID == nil || *existing.TenantID != tenantID {
+		return fmt.Errorf("template does not belong to tenant")
+	}
+
+	_, err = s.db.ExecContext(ctx, "DELETE FROM document_templates WHERE id = $1 AND tenant_id = $2", templateID, tenantID)
+	if err != nil {
+		return fmt.Errorf("deleting template: %w", err)
+	}
+
+	s.audit.Log(ctx, "delete", "document_template", &templateID, existing, nil)
+	return nil
+}
+
+// RenderData holds all the data available for template variable replacement.
+type RenderData struct {
+	Case     *models.Case
+	Parties  []models.Party
+	Tenant   *models.Tenant
+	Deadline *models.Deadline
+	UserName string
+	UserEmail string
+}
+
+// Render replaces {{placeholders}} in the template content with actual data.
+func (s *TemplateService) Render(template *models.DocumentTemplate, data RenderData) string {
+	content := template.Content
+
+	now := time.Now()
+
+	replacements := map[string]string{
+		"{{date.today}}":      now.Format("02.01.2006"),
+		"{{date.today_long}}": formatGermanDate(now),
+	}
+
+	// Case data
+	if data.Case != nil {
+		replacements["{{case.number}}"] = data.Case.CaseNumber
+		replacements["{{case.title}}"] = data.Case.Title
+		if data.Case.Court != nil {
+			replacements["{{case.court}}"] = *data.Case.Court
+		}
+		if data.Case.CourtRef != nil {
+			replacements["{{case.court_ref}}"] = *data.Case.CourtRef
+		}
+	}
+
+	// Party data
+	for _, p := range data.Parties {
+		role := ""
+		if p.Role != nil {
+			role = *p.Role
+		}
+		switch role {
+		case "claimant", "plaintiff", "klaeger":
+			replacements["{{party.claimant.name}}"] = p.Name
+			if p.Representative != nil {
+				replacements["{{party.claimant.representative}}"] = *p.Representative
+			}
+		case "defendant", "beklagter":
+			replacements["{{party.defendant.name}}"] = p.Name
+			if p.Representative != nil {
+				replacements["{{party.defendant.representative}}"] = *p.Representative
+			}
+		}
+	}
+
+	// Tenant data
+	if data.Tenant != nil {
+		replacements["{{tenant.name}}"] = data.Tenant.Name
+		// Extract address from settings if available
+		replacements["{{tenant.address}}"] = extractSettingsField(data.Tenant.Settings, "address")
+	}
+
+	// User data
+	replacements["{{user.name}}"] = data.UserName
+	replacements["{{user.email}}"] = data.UserEmail
+
+	// Deadline data
+	if data.Deadline != nil {
+		replacements["{{deadline.title}}"] = data.Deadline.Title
+		replacements["{{deadline.due_date}}"] = data.Deadline.DueDate
+	}
+
+	for placeholder, value := range replacements {
+		content = strings.ReplaceAll(content, placeholder, value)
+	}
+
+	return content
+}
+
+func formatGermanDate(t time.Time) string {
+	months := []string{
+		"Januar", "Februar", "März", "April", "Mai", "Juni",
+		"Juli", "August", "September", "Oktober", "November", "Dezember",
+	}
+	return fmt.Sprintf("%d. %s %d", t.Day(), months[t.Month()-1], t.Year())
+}
+
+func extractSettingsField(settings []byte, field string) string {
+	if len(settings) == 0 {
+		return ""
+	}
+	var m map[string]any
+	if err := json.Unmarshal(settings, &m); err != nil {
+		return ""
+	}
+	if v, ok := m[field]; ok {
+		if s, ok := v.(string); ok {
+			return s
+		}
+	}
+	return ""
+}

backend/internal/services/time_entry_service.go

@@ -1,276 +0,0 @@
-package services
-
-import (
-	"context"
-	"database/sql"
-	"fmt"
-
-	"github.com/google/uuid"
-	"github.com/jmoiron/sqlx"
-
-	"mgit.msbls.de/m/KanzlAI-mGMT/internal/models"
-)
-
-type TimeEntryService struct {
-	db    *sqlx.DB
-	audit *AuditService
-}
-
-func NewTimeEntryService(db *sqlx.DB, audit *AuditService) *TimeEntryService {
-	return &TimeEntryService{db: db, audit: audit}
-}
-
-type CreateTimeEntryInput struct {
-	CaseID          uuid.UUID `json:"case_id"`
-	Date            string    `json:"date"`
-	DurationMinutes int       `json:"duration_minutes"`
-	Description     string    `json:"description"`
-	Activity        *string   `json:"activity,omitempty"`
-	Billable        *bool     `json:"billable,omitempty"`
-	HourlyRate      *float64  `json:"hourly_rate,omitempty"`
-}
-
-type UpdateTimeEntryInput struct {
-	Date            *string  `json:"date,omitempty"`
-	DurationMinutes *int     `json:"duration_minutes,omitempty"`
-	Description     *string  `json:"description,omitempty"`
-	Activity        *string  `json:"activity,omitempty"`
-	Billable        *bool    `json:"billable,omitempty"`
-	HourlyRate      *float64 `json:"hourly_rate,omitempty"`
-}
-
-type TimeEntryFilter struct {
-	CaseID *uuid.UUID
-	UserID *uuid.UUID
-	From   string
-	To     string
-	Limit  int
-	Offset int
-}
-
-type TimeEntrySummary struct {
-	GroupKey       string  `db:"group_key" json:"group_key"`
-	TotalMinutes   int     `db:"total_minutes" json:"total_minutes"`
-	BillableMinutes int   `db:"billable_minutes" json:"billable_minutes"`
-	TotalAmount    float64 `db:"total_amount" json:"total_amount"`
-	EntryCount     int     `db:"entry_count" json:"entry_count"`
-}
-
-const timeEntryCols = `id, tenant_id, case_id, user_id, date, duration_minutes, description,
-	activity, billable, billed, invoice_id, hourly_rate, created_at, updated_at`
-
-func (s *TimeEntryService) ListForCase(ctx context.Context, tenantID, caseID uuid.UUID) ([]models.TimeEntry, error) {
-	var entries []models.TimeEntry
-	err := s.db.SelectContext(ctx, &entries,
-		`SELECT `+timeEntryCols+` FROM time_entries
-		 WHERE tenant_id = $1 AND case_id = $2
-		 ORDER BY date DESC, created_at DESC`,
-		tenantID, caseID)
-	if err != nil {
-		return nil, fmt.Errorf("list time entries for case: %w", err)
-	}
-	return entries, nil
-}
-
-func (s *TimeEntryService) List(ctx context.Context, tenantID uuid.UUID, filter TimeEntryFilter) ([]models.TimeEntry, int, error) {
-	if filter.Limit <= 0 {
-		filter.Limit = 20
-	}
-	if filter.Limit > 100 {
-		filter.Limit = 100
-	}
-
-	where := "WHERE tenant_id = $1"
-	args := []any{tenantID}
-	argIdx := 2
-
-	if filter.CaseID != nil {
-		where += fmt.Sprintf(" AND case_id = $%d", argIdx)
-		args = append(args, *filter.CaseID)
-		argIdx++
-	}
-	if filter.UserID != nil {
-		where += fmt.Sprintf(" AND user_id = $%d", argIdx)
-		args = append(args, *filter.UserID)
-		argIdx++
-	}
-	if filter.From != "" {
-		where += fmt.Sprintf(" AND date >= $%d", argIdx)
-		args = append(args, filter.From)
-		argIdx++
-	}
-	if filter.To != "" {
-		where += fmt.Sprintf(" AND date <= $%d", argIdx)
-		args = append(args, filter.To)
-		argIdx++
-	}
-
-	var total int
-	err := s.db.GetContext(ctx, &total,
-		"SELECT COUNT(*) FROM time_entries "+where, args...)
-	if err != nil {
-		return nil, 0, fmt.Errorf("count time entries: %w", err)
-	}
-
-	query := fmt.Sprintf("SELECT %s FROM time_entries %s ORDER BY date DESC, created_at DESC LIMIT $%d OFFSET $%d",
-		timeEntryCols, where, argIdx, argIdx+1)
-	args = append(args, filter.Limit, filter.Offset)
-
-	var entries []models.TimeEntry
-	err = s.db.SelectContext(ctx, &entries, query, args...)
-	if err != nil {
-		return nil, 0, fmt.Errorf("list time entries: %w", err)
-	}
-	return entries, total, nil
-}
-
-func (s *TimeEntryService) GetByID(ctx context.Context, tenantID, entryID uuid.UUID) (*models.TimeEntry, error) {
-	var entry models.TimeEntry
-	err := s.db.GetContext(ctx, &entry,
-		`SELECT `+timeEntryCols+` FROM time_entries WHERE tenant_id = $1 AND id = $2`,
-		tenantID, entryID)
-	if err == sql.ErrNoRows {
-		return nil, nil
-	}
-	if err != nil {
-		return nil, fmt.Errorf("get time entry: %w", err)
-	}
-	return &entry, nil
-}
-
-func (s *TimeEntryService) Create(ctx context.Context, tenantID, userID uuid.UUID, input CreateTimeEntryInput) (*models.TimeEntry, error) {
-	billable := true
-	if input.Billable != nil {
-		billable = *input.Billable
-	}
-
-	// If no hourly rate provided, look up the current billing rate
-	hourlyRate := input.HourlyRate
-	if hourlyRate == nil {
-		var rate float64
-		err := s.db.GetContext(ctx, &rate,
-			`SELECT rate FROM billing_rates
-			 WHERE tenant_id = $1 AND (user_id = $2 OR user_id IS NULL)
-			 AND valid_from <= $3 AND (valid_to IS NULL OR valid_to >= $3)
-			 ORDER BY user_id NULLS LAST LIMIT 1`,
-			tenantID, userID, input.Date)
-		if err == nil {
-			hourlyRate = &rate
-		}
-	}
-
-	var entry models.TimeEntry
-	err := s.db.QueryRowxContext(ctx,
-		`INSERT INTO time_entries (tenant_id, case_id, user_id, date, duration_minutes, description, activity, billable, hourly_rate)
-		 VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
-		 RETURNING `+timeEntryCols,
-		tenantID, input.CaseID, userID, input.Date, input.DurationMinutes, input.Description, input.Activity, billable, hourlyRate,
-	).StructScan(&entry)
-	if err != nil {
-		return nil, fmt.Errorf("create time entry: %w", err)
-	}
-
-	s.audit.Log(ctx, "create", "time_entry", &entry.ID, nil, entry)
-	return &entry, nil
-}
-
-func (s *TimeEntryService) Update(ctx context.Context, tenantID, entryID uuid.UUID, input UpdateTimeEntryInput) (*models.TimeEntry, error) {
-	old, err := s.GetByID(ctx, tenantID, entryID)
-	if err != nil {
-		return nil, err
-	}
-	if old == nil {
-		return nil, fmt.Errorf("time entry not found")
-	}
-	if old.Billed {
-		return nil, fmt.Errorf("cannot update a billed time entry")
-	}
-
-	var entry models.TimeEntry
-	err = s.db.QueryRowxContext(ctx,
-		`UPDATE time_entries SET
-			date = COALESCE($3, date),
-			duration_minutes = COALESCE($4, duration_minutes),
-			description = COALESCE($5, description),
-			activity = COALESCE($6, activity),
-			billable = COALESCE($7, billable),
-			hourly_rate = COALESCE($8, hourly_rate),
-			updated_at = now()
-		 WHERE tenant_id = $1 AND id = $2
-		 RETURNING `+timeEntryCols,
-		tenantID, entryID, input.Date, input.DurationMinutes, input.Description, input.Activity, input.Billable, input.HourlyRate,
-	).StructScan(&entry)
-	if err != nil {
-		return nil, fmt.Errorf("update time entry: %w", err)
-	}
-
-	s.audit.Log(ctx, "update", "time_entry", &entry.ID, old, entry)
-	return &entry, nil
-}
-
-func (s *TimeEntryService) Delete(ctx context.Context, tenantID, entryID uuid.UUID) error {
-	old, err := s.GetByID(ctx, tenantID, entryID)
-	if err != nil {
-		return err
-	}
-	if old == nil {
-		return fmt.Errorf("time entry not found")
-	}
-	if old.Billed {
-		return fmt.Errorf("cannot delete a billed time entry")
-	}
-
-	_, err = s.db.ExecContext(ctx,
-		`DELETE FROM time_entries WHERE tenant_id = $1 AND id = $2`,
-		tenantID, entryID)
-	if err != nil {
-		return fmt.Errorf("delete time entry: %w", err)
-	}
-
-	s.audit.Log(ctx, "delete", "time_entry", &entryID, old, nil)
-	return nil
-}
-
-func (s *TimeEntryService) Summary(ctx context.Context, tenantID uuid.UUID, groupBy string, from, to string) ([]TimeEntrySummary, error) {
-	var groupExpr string
-	switch groupBy {
-	case "user":
-		groupExpr = "user_id::text"
-	case "month":
-		groupExpr = "to_char(date, 'YYYY-MM')"
-	default:
-		groupExpr = "case_id::text"
-	}
-
-	where := "WHERE tenant_id = $1"
-	args := []any{tenantID}
-	argIdx := 2
-
-	if from != "" {
-		where += fmt.Sprintf(" AND date >= $%d", argIdx)
-		args = append(args, from)
-		argIdx++
-	}
-	if to != "" {
-		where += fmt.Sprintf(" AND date <= $%d", argIdx)
-		args = append(args, to)
-		argIdx++
-	}
-
-	query := fmt.Sprintf(`SELECT %s AS group_key,
-		SUM(duration_minutes) AS total_minutes,
-		SUM(CASE WHEN billable THEN duration_minutes ELSE 0 END) AS billable_minutes,
-		SUM(CASE WHEN billable AND hourly_rate IS NOT NULL THEN duration_minutes * hourly_rate / 60.0 ELSE 0 END) AS total_amount,
-		COUNT(*) AS entry_count
-		FROM time_entries %s
-		GROUP BY %s
-		ORDER BY %s`,
-		groupExpr, where, groupExpr, groupExpr)
-
-	var summaries []TimeEntrySummary
-	err := s.db.SelectContext(ctx, &summaries, query, args...)
-	if err != nil {
-		return nil, fmt.Errorf("time entry summary: %w", err)
-	}
-	return summaries, nil
-}

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

@@ -1,164 +0,0 @@
-"use client";
-
-import { useQuery } from "@tanstack/react-query";
-import { api } from "@/lib/api";
-import type { TimeEntry } from "@/lib/types";
-import { format } from "date-fns";
-import { de } from "date-fns/locale";
-import { Timer, Loader2 } from "lucide-react";
-import { useState } from "react";
-import Link from "next/link";
-import { Breadcrumb } from "@/components/layout/Breadcrumb";
-
-function formatDuration(minutes: number): string {
-  const h = Math.floor(minutes / 60);
-  const m = minutes % 60;
-  if (h === 0) return `${m}min`;
-  if (m === 0) return `${h}h`;
-  return `${h}h ${m}min`;
-}
-
-export default function AbrechnungPage() {
-  const [from, setFrom] = useState(() => {
-    const d = new Date();
-    d.setDate(1);
-    return format(d, "yyyy-MM-dd");
-  });
-  const [to, setTo] = useState(() => format(new Date(), "yyyy-MM-dd"));
-
-  const { data, isLoading } = useQuery({
-    queryKey: ["time-entries", from, to],
-    queryFn: () =>
-      api.get<{ time_entries: TimeEntry[]; total: number }>(
-        `/time-entries?from=${from}&to=${to}&limit=100`,
-      ),
-  });
-
-  const entries = data?.time_entries ?? [];
-  const totalMinutes = entries.reduce((s, e) => s + e.duration_minutes, 0);
-  const billableMinutes = entries
-    .filter((e) => e.billable)
-    .reduce((s, e) => s + e.duration_minutes, 0);
-  const totalAmount = entries
-    .filter((e) => e.billable && e.hourly_rate)
-    .reduce((s, e) => s + (e.duration_minutes / 60) * (e.hourly_rate ?? 0), 0);
-
-  return (
-    <div className="animate-fade-in">
-      <Breadcrumb
-        items={[
-          { label: "Dashboard", href: "/dashboard" },
-          { label: "Abrechnung" },
-        ]}
-      />
-
-      <div className="mt-4 flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
-        <h1 className="text-lg font-semibold text-neutral-900">
-          Zeiterfassung
-        </h1>
-        <Link
-          href="/abrechnung/rechnungen"
-          className="text-sm text-neutral-500 transition-colors hover:text-neutral-700"
-        >
-          Rechnungen ansehen &rarr;
-        </Link>
-      </div>
-
-      {/* Filters */}
-      <div className="mt-4 flex flex-wrap items-center gap-3">
-        <div className="flex items-center gap-2">
-          <label className="text-xs text-neutral-500">Von</label>
-          <input
-            type="date"
-            value={from}
-            onChange={(e) => setFrom(e.target.value)}
-            className="rounded-md border border-neutral-300 px-2 py-1 text-sm focus:border-neutral-500 focus:outline-none"
-          />
-        </div>
-        <div className="flex items-center gap-2">
-          <label className="text-xs text-neutral-500">Bis</label>
-          <input
-            type="date"
-            value={to}
-            onChange={(e) => setTo(e.target.value)}
-            className="rounded-md border border-neutral-300 px-2 py-1 text-sm focus:border-neutral-500 focus:outline-none"
-          />
-        </div>
-      </div>
-
-      {/* Summary cards */}
-      <div className="mt-4 grid grid-cols-1 gap-3 sm:grid-cols-3">
-        <div className="rounded-md border border-neutral-200 bg-white p-4">
-          <p className="text-xs text-neutral-500">Gesamt</p>
-          <p className="mt-1 text-xl font-semibold text-neutral-900">
-            {formatDuration(totalMinutes)}
-          </p>
-        </div>
-        <div className="rounded-md border border-neutral-200 bg-white p-4">
-          <p className="text-xs text-neutral-500">Abrechenbar</p>
-          <p className="mt-1 text-xl font-semibold text-neutral-900">
-            {formatDuration(billableMinutes)}
-          </p>
-        </div>
-        <div className="rounded-md border border-neutral-200 bg-white p-4">
-          <p className="text-xs text-neutral-500">Betrag</p>
-          <p className="mt-1 text-xl font-semibold text-neutral-900">
-            {totalAmount.toFixed(2)} EUR
-          </p>
-        </div>
-      </div>
-
-      {/* Entries */}
-      {isLoading ? (
-        <div className="flex items-center justify-center py-8">
-          <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
-        </div>
-      ) : entries.length === 0 ? (
-        <div className="flex flex-col items-center py-12 text-center">
-          <div className="rounded-xl bg-neutral-100 p-3">
-            <Timer className="h-5 w-5 text-neutral-400" />
-          </div>
-          <p className="mt-2 text-sm text-neutral-500">
-            Keine Zeiteintraege im gewaehlten Zeitraum.
-          </p>
-        </div>
-      ) : (
-        <div className="mt-4 space-y-2">
-          {entries.map((entry) => (
-            <div
-              key={entry.id}
-              className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-3"
-            >
-              <div className="min-w-0 flex-1">
-                <p className="text-sm font-medium text-neutral-900 truncate">
-                  {entry.description}
-                </p>
-                <div className="mt-0.5 flex gap-3 text-xs text-neutral-500">
-                  <span>
-                    {format(new Date(entry.date), "d. MMM yyyy", { locale: de })}
-                  </span>
-                  <Link
-                    href={`/cases/${entry.case_id}/zeiterfassung`}
-                    className="hover:text-neutral-700"
-                  >
-                    Akte ansehen
-                  </Link>
-                </div>
-              </div>
-              <div className="flex items-center gap-4 ml-4 text-sm">
-                {entry.billable ? (
-                  <span className="text-emerald-600">abrechenbar</span>
-                ) : (
-                  <span className="text-neutral-400">intern</span>
-                )}
-                <span className="font-medium text-neutral-900 whitespace-nowrap">
-                  {formatDuration(entry.duration_minutes)}
-                </span>
-              </div>
-            </div>
-          ))}
-        </div>
-      )}
-    </div>
-  );
-}

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

@@ -1,225 +0,0 @@
-"use client";
-
-import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
-import { useParams } from "next/navigation";
-import { api } from "@/lib/api";
-import type { Invoice } from "@/lib/types";
-import { format } from "date-fns";
-import { de } from "date-fns/locale";
-import { Loader2, AlertTriangle } from "lucide-react";
-import { Breadcrumb } from "@/components/layout/Breadcrumb";
-
-const STATUS_BADGE: Record<string, string> = {
-  draft: "bg-neutral-100 text-neutral-600",
-  sent: "bg-blue-50 text-blue-700",
-  paid: "bg-emerald-50 text-emerald-700",
-  cancelled: "bg-red-50 text-red-600",
-};
-
-const STATUS_LABEL: Record<string, string> = {
-  draft: "Entwurf",
-  sent: "Versendet",
-  paid: "Bezahlt",
-  cancelled: "Storniert",
-};
-
-const TRANSITIONS: Record<string, { label: string; next: string }[]> = {
-  draft: [
-    { label: "Als versendet markieren", next: "sent" },
-    { label: "Stornieren", next: "cancelled" },
-  ],
-  sent: [
-    { label: "Als bezahlt markieren", next: "paid" },
-    { label: "Stornieren", next: "cancelled" },
-  ],
-  paid: [],
-  cancelled: [],
-};
-
-export default function InvoiceDetailPage() {
-  const { id } = useParams<{ id: string }>();
-  const queryClient = useQueryClient();
-
-  const { data: invoice, isLoading, error } = useQuery({
-    queryKey: ["invoice", id],
-    queryFn: () => api.get<Invoice>(`/invoices/${id}`),
-  });
-
-  const statusMutation = useMutation({
-    mutationFn: (status: string) =>
-      api.patch<Invoice>(`/invoices/${id}/status`, { status }),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["invoice", id] });
-      queryClient.invalidateQueries({ queryKey: ["invoices"] });
-    },
-  });
-
-  if (isLoading) {
-    return (
-      <div className="flex items-center justify-center py-12">
-        <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
-      </div>
-    );
-  }
-
-  if (error || !invoice) {
-    return (
-      <div className="py-12 text-center">
-        <AlertTriangle className="mx-auto h-6 w-6 text-red-500" />
-        <p className="mt-2 text-sm text-neutral-500">
-          Rechnung nicht gefunden.
-        </p>
-      </div>
-    );
-  }
-
-  const items = Array.isArray(invoice.items) ? invoice.items : [];
-  const actions = TRANSITIONS[invoice.status] ?? [];
-
-  return (
-    <div className="animate-fade-in">
-      <Breadcrumb
-        items={[
-          { label: "Dashboard", href: "/dashboard" },
-          { label: "Abrechnung", href: "/abrechnung" },
-          { label: "Rechnungen", href: "/abrechnung/rechnungen" },
-          { label: invoice.invoice_number },
-        ]}
-      />
-
-      <div className="mt-4 flex flex-col gap-3 sm:flex-row sm:items-start sm:justify-between">
-        <div>
-          <div className="flex items-center gap-3">
-            <h1 className="text-lg font-semibold text-neutral-900">
-              {invoice.invoice_number}
-            </h1>
-            <span
-              className={`rounded-full px-2 py-0.5 text-xs font-medium ${STATUS_BADGE[invoice.status]}`}
-            >
-              {STATUS_LABEL[invoice.status]}
-            </span>
-          </div>
-          <p className="mt-1 text-sm text-neutral-500">
-            {invoice.client_name}
-          </p>
-        </div>
-        <div className="flex gap-2">
-          {actions.map((action) => (
-            <button
-              key={action.next}
-              onClick={() => statusMutation.mutate(action.next)}
-              disabled={statusMutation.isPending}
-              className="rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:opacity-50"
-            >
-              {action.label}
-            </button>
-          ))}
-        </div>
-      </div>
-
-      {/* Invoice details */}
-      <div className="mt-6 rounded-md border border-neutral-200 bg-white">
-        {/* Client info */}
-        <div className="border-b border-neutral-100 p-4">
-          <p className="text-xs text-neutral-500">Empfaenger</p>
-          <p className="mt-1 text-sm font-medium text-neutral-900">
-            {invoice.client_name}
-          </p>
-          {invoice.client_address && (
-            <p className="mt-0.5 text-sm text-neutral-500 whitespace-pre-line">
-              {invoice.client_address}
-            </p>
-          )}
-        </div>
-
-        {/* Dates */}
-        <div className="flex flex-wrap gap-6 border-b border-neutral-100 p-4">
-          {invoice.issued_at && (
-            <div>
-              <p className="text-xs text-neutral-500">Rechnungsdatum</p>
-              <p className="mt-0.5 text-sm text-neutral-900">
-                {format(new Date(invoice.issued_at), "d. MMMM yyyy", { locale: de })}
-              </p>
-            </div>
-          )}
-          {invoice.due_at && (
-            <div>
-              <p className="text-xs text-neutral-500">Faellig am</p>
-              <p className="mt-0.5 text-sm text-neutral-900">
-                {format(new Date(invoice.due_at), "d. MMMM yyyy", { locale: de })}
-              </p>
-            </div>
-          )}
-          {invoice.paid_at && (
-            <div>
-              <p className="text-xs text-neutral-500">Bezahlt am</p>
-              <p className="mt-0.5 text-sm text-neutral-900">
-                {format(new Date(invoice.paid_at), "d. MMMM yyyy", { locale: de })}
-              </p>
-            </div>
-          )}
-        </div>
-
-        {/* Line items */}
-        <div className="p-4">
-          <table className="w-full text-sm">
-            <thead>
-              <tr className="border-b border-neutral-100 text-left text-xs text-neutral-500">
-                <th className="pb-2 font-medium">Beschreibung</th>
-                <th className="pb-2 font-medium text-right">Betrag</th>
-              </tr>
-            </thead>
-            <tbody>
-              {items.map((item, i) => (
-                <tr key={i} className="border-b border-neutral-50">
-                  <td className="py-2 text-neutral-900">
-                    {item.description}
-                    {item.duration_minutes && item.hourly_rate && (
-                      <span className="ml-2 text-xs text-neutral-400">
-                        ({Math.floor(item.duration_minutes / 60)}h{" "}
-                        {item.duration_minutes % 60}min x {item.hourly_rate} EUR/h)
-                      </span>
-                    )}
-                  </td>
-                  <td className="py-2 text-right text-neutral-900">
-                    {item.amount.toFixed(2)} EUR
-                  </td>
-                </tr>
-              ))}
-            </tbody>
-          </table>
-        </div>
-
-        {/* Totals */}
-        <div className="border-t border-neutral-200 p-4">
-          <div className="flex justify-end">
-            <div className="w-48 space-y-1">
-              <div className="flex justify-between text-sm">
-                <span className="text-neutral-500">Netto</span>
-                <span>{invoice.subtotal.toFixed(2)} EUR</span>
-              </div>
-              <div className="flex justify-between text-sm">
-                <span className="text-neutral-500">
-                  USt. {invoice.tax_rate}%
-                </span>
-                <span>{invoice.tax_amount.toFixed(2)} EUR</span>
-              </div>
-              <div className="flex justify-between border-t border-neutral-200 pt-1 text-sm font-semibold">
-                <span>Gesamt</span>
-                <span>{invoice.total.toFixed(2)} EUR</span>
-              </div>
-            </div>
-          </div>
-        </div>
-
-        {/* Notes */}
-        {invoice.notes && (
-          <div className="border-t border-neutral-100 p-4">
-            <p className="text-xs text-neutral-500">Anmerkungen</p>
-            <p className="mt-1 text-sm text-neutral-700">{invoice.notes}</p>
-          </div>
-        )}
-      </div>
-    </div>
-  );
-}

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

@@ -1,118 +0,0 @@
-"use client";
-
-import { useQuery } from "@tanstack/react-query";
-import { api } from "@/lib/api";
-import type { Invoice } from "@/lib/types";
-import { format } from "date-fns";
-import { de } from "date-fns/locale";
-import { Receipt, Loader2 } from "lucide-react";
-import Link from "next/link";
-import { useState } from "react";
-import { Breadcrumb } from "@/components/layout/Breadcrumb";
-
-const STATUS_BADGE: Record<string, string> = {
-  draft: "bg-neutral-100 text-neutral-600",
-  sent: "bg-blue-50 text-blue-700",
-  paid: "bg-emerald-50 text-emerald-700",
-  cancelled: "bg-red-50 text-red-600",
-};
-
-const STATUS_LABEL: Record<string, string> = {
-  draft: "Entwurf",
-  sent: "Versendet",
-  paid: "Bezahlt",
-  cancelled: "Storniert",
-};
-
-export default function RechnungenPage() {
-  const [statusFilter, setStatusFilter] = useState("");
-
-  const { data, isLoading } = useQuery({
-    queryKey: ["invoices", statusFilter],
-    queryFn: () => {
-      const params = statusFilter ? `?status=${statusFilter}` : "";
-      return api.get<{ invoices: Invoice[] }>(`/invoices${params}`);
-    },
-  });
-
-  const invoices = data?.invoices ?? [];
-
-  return (
-    <div className="animate-fade-in">
-      <Breadcrumb
-        items={[
-          { label: "Dashboard", href: "/dashboard" },
-          { label: "Abrechnung", href: "/abrechnung" },
-          { label: "Rechnungen" },
-        ]}
-      />
-
-      <div className="mt-4 flex items-center justify-between">
-        <h1 className="text-lg font-semibold text-neutral-900">Rechnungen</h1>
-      </div>
-
-      {/* Filters */}
-      <div className="mt-4 flex gap-2">
-        {["", "draft", "sent", "paid", "cancelled"].map((s) => (
-          <button
-            key={s}
-            onClick={() => setStatusFilter(s)}
-            className={`rounded-md px-2.5 py-1 text-xs font-medium transition-colors ${
-              statusFilter === s
-                ? "bg-neutral-900 text-white"
-                : "bg-neutral-100 text-neutral-600 hover:bg-neutral-200"
-            }`}
-          >
-            {s === "" ? "Alle" : STATUS_LABEL[s]}
-          </button>
-        ))}
-      </div>
-
-      {isLoading ? (
-        <div className="flex items-center justify-center py-8">
-          <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
-        </div>
-      ) : invoices.length === 0 ? (
-        <div className="flex flex-col items-center py-12 text-center">
-          <div className="rounded-xl bg-neutral-100 p-3">
-            <Receipt className="h-5 w-5 text-neutral-400" />
-          </div>
-          <p className="mt-2 text-sm text-neutral-500">
-            Keine Rechnungen vorhanden.
-          </p>
-        </div>
-      ) : (
-        <div className="mt-4 space-y-2">
-          {invoices.map((inv) => (
-            <Link
-              key={inv.id}
-              href={`/abrechnung/rechnungen/${inv.id}`}
-              className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-3 transition-colors hover:bg-neutral-50"
-            >
-              <div>
-                <div className="flex items-center gap-2">
-                  <p className="text-sm font-medium text-neutral-900">
-                    {inv.invoice_number}
-                  </p>
-                  <span
-                    className={`rounded-full px-2 py-0.5 text-xs font-medium ${STATUS_BADGE[inv.status]}`}
-                  >
-                    {STATUS_LABEL[inv.status]}
-                  </span>
-                </div>
-                <p className="mt-0.5 text-xs text-neutral-500">
-                  {inv.client_name}
-                  {inv.issued_at &&
-                    ` — ${format(new Date(inv.issued_at), "d. MMM yyyy", { locale: de })}`}
-                </p>
-              </div>
-              <p className="text-sm font-semibold text-neutral-900">
-                {inv.total.toFixed(2)} EUR
-              </p>
-            </Link>
-          ))}
-        </div>
-      )}
-    </div>
-  );
-}

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

@@ -17,7 +17,7 @@ import {
   StickyNote,
   AlertTriangle,
   ScrollText,
-  Timer,
+  FilePlus,
 } from "lucide-react";
 import { format } from "date-fns";
 import { de } from "date-fns/locale";
@@ -47,7 +47,6 @@ const TABS = [
   { segment: "dokumente", label: "Dokumente", icon: FileText },
   { segment: "parteien", label: "Parteien", icon: Users },
   { segment: "mitarbeiter", label: "Mitarbeiter", icon: UserCheck },
-  { segment: "zeiterfassung", label: "Zeiterfassung", icon: Timer },
   { segment: "notizen", label: "Notizen", icon: StickyNote },
   { segment: "protokoll", label: "Protokoll", icon: ScrollText },
 ] as const;
@@ -58,7 +57,6 @@ const TAB_LABELS: Record<string, string> = {
   dokumente: "Dokumente",
   parteien: "Parteien",
   mitarbeiter: "Mitarbeiter",
-  zeiterfassung: "Zeiterfassung",
   notizen: "Notizen",
   protokoll: "Protokoll",
 };
@@ -174,6 +172,14 @@ export default function CaseDetailLayout({
             {caseDetail.court_ref && <span>({caseDetail.court_ref})</span>}
           </div>
         </div>
+        <div className="flex flex-col items-end gap-2">
+          <Link
+            href={`/vorlagen?case_id=${id}`}
+            className="flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
+          >
+            <FilePlus className="h-3.5 w-3.5" />
+            Schriftsatz erstellen
+          </Link>
           <div className="text-right text-xs text-neutral-400">
             <p>
               Erstellt:{" "}
@@ -189,6 +195,7 @@ export default function CaseDetailLayout({
             </p>
           </div>
         </div>
+      </div>
 
       {caseDetail.ai_summary && (
         <div className="mt-4 rounded-md border border-blue-100 bg-blue-50 px-4 py-3 text-sm text-blue-800">

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

@@ -1,306 +0,0 @@
-"use client";
-
-import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
-import { useParams } from "next/navigation";
-import { api } from "@/lib/api";
-import type { TimeEntry } from "@/lib/types";
-import { format } from "date-fns";
-import { de } from "date-fns/locale";
-import { Timer, Loader2, Plus, Trash2 } from "lucide-react";
-import { useState } from "react";
-
-function formatDuration(minutes: number): string {
-  const h = Math.floor(minutes / 60);
-  const m = minutes % 60;
-  if (h === 0) return `${m}min`;
-  if (m === 0) return `${h}h`;
-  return `${h}h ${m}min`;
-}
-
-function formatAmount(minutes: number, rate?: number): string {
-  if (!rate) return "-";
-  return `${((minutes / 60) * rate).toFixed(2)} EUR`;
-}
-
-const ACTIVITIES = [
-  { value: "", label: "Keine Kategorie" },
-  { value: "research", label: "Recherche" },
-  { value: "drafting", label: "Entwurf" },
-  { value: "hearing", label: "Verhandlung" },
-  { value: "call", label: "Telefonat" },
-  { value: "review", label: "Prüfung" },
-  { value: "travel", label: "Reise" },
-  { value: "meeting", label: "Besprechung" },
-];
-
-export default function ZeiterfassungPage() {
-  const { id } = useParams<{ id: string }>();
-  const queryClient = useQueryClient();
-  const [showForm, setShowForm] = useState(false);
-  const [desc, setDesc] = useState("");
-  const [hours, setHours] = useState("");
-  const [minutes, setMinutes] = useState("");
-  const [date, setDate] = useState(format(new Date(), "yyyy-MM-dd"));
-  const [activity, setActivity] = useState("");
-  const [billable, setBillable] = useState(true);
-
-  const { data, isLoading } = useQuery({
-    queryKey: ["case-time-entries", id],
-    queryFn: () =>
-      api.get<{ time_entries: TimeEntry[] }>(`/cases/${id}/time-entries`),
-  });
-
-  const createMutation = useMutation({
-    mutationFn: (input: {
-      description: string;
-      duration_minutes: number;
-      date: string;
-      activity?: string;
-      billable: boolean;
-    }) => api.post<TimeEntry>(`/cases/${id}/time-entries`, input),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["case-time-entries", id] });
-      setShowForm(false);
-      setDesc("");
-      setHours("");
-      setMinutes("");
-      setActivity("");
-      setBillable(true);
-    },
-  });
-
-  const deleteMutation = useMutation({
-    mutationFn: (entryId: string) =>
-      api.delete(`/time-entries/${entryId}`),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["case-time-entries", id] });
-    },
-  });
-
-  function handleSubmit(e: React.FormEvent) {
-    e.preventDefault();
-    const totalMinutes = (parseInt(hours || "0") * 60) + parseInt(minutes || "0");
-    if (totalMinutes <= 0 || !desc.trim()) return;
-    createMutation.mutate({
-      description: desc.trim(),
-      duration_minutes: totalMinutes,
-      date,
-      activity: activity || undefined,
-      billable,
-    });
-  }
-
-  if (isLoading) {
-    return (
-      <div className="flex items-center justify-center py-8">
-        <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
-      </div>
-    );
-  }
-
-  const entries = data?.time_entries ?? [];
-  const totalMinutes = entries.reduce((s, e) => s + e.duration_minutes, 0);
-  const billableMinutes = entries
-    .filter((e) => e.billable)
-    .reduce((s, e) => s + e.duration_minutes, 0);
-
-  return (
-    <div className="space-y-4">
-      {/* Summary bar */}
-      <div className="flex flex-wrap items-center justify-between gap-3">
-        <div className="flex gap-6 text-sm text-neutral-500">
-          <span>
-            Gesamt: <span className="font-medium text-neutral-900">{formatDuration(totalMinutes)}</span>
-          </span>
-          <span>
-            Abrechenbar: <span className="font-medium text-neutral-900">{formatDuration(billableMinutes)}</span>
-          </span>
-        </div>
-        <button
-          onClick={() => setShowForm(!showForm)}
-          className="inline-flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
-        >
-          <Plus className="h-3.5 w-3.5" />
-          Eintrag
-        </button>
-      </div>
-
-      {/* Quick add form */}
-      {showForm && (
-        <form
-          onSubmit={handleSubmit}
-          className="rounded-md border border-neutral-200 bg-neutral-50 p-4 space-y-3"
-        >
-          <div>
-            <label className="block text-xs font-medium text-neutral-600 mb-1">
-              Beschreibung
-            </label>
-            <input
-              type="text"
-              value={desc}
-              onChange={(e) => setDesc(e.target.value)}
-              placeholder="Was wurde getan?"
-              className="w-full rounded-md border border-neutral-300 px-3 py-1.5 text-sm focus:border-neutral-500 focus:outline-none"
-              required
-            />
-          </div>
-          <div className="flex flex-wrap gap-3">
-            <div className="flex-1 min-w-[120px]">
-              <label className="block text-xs font-medium text-neutral-600 mb-1">
-                Dauer
-              </label>
-              <div className="flex gap-2">
-                <div className="flex items-center gap-1">
-                  <input
-                    type="number"
-                    min="0"
-                    value={hours}
-                    onChange={(e) => setHours(e.target.value)}
-                    placeholder="0"
-                    className="w-16 rounded-md border border-neutral-300 px-2 py-1.5 text-sm focus:border-neutral-500 focus:outline-none"
-                  />
-                  <span className="text-xs text-neutral-500">h</span>
-                </div>
-                <div className="flex items-center gap-1">
-                  <input
-                    type="number"
-                    min="0"
-                    max="59"
-                    value={minutes}
-                    onChange={(e) => setMinutes(e.target.value)}
-                    placeholder="0"
-                    className="w-16 rounded-md border border-neutral-300 px-2 py-1.5 text-sm focus:border-neutral-500 focus:outline-none"
-                  />
-                  <span className="text-xs text-neutral-500">min</span>
-                </div>
-              </div>
-            </div>
-            <div className="flex-1 min-w-[120px]">
-              <label className="block text-xs font-medium text-neutral-600 mb-1">
-                Datum
-              </label>
-              <input
-                type="date"
-                value={date}
-                onChange={(e) => setDate(e.target.value)}
-                className="w-full rounded-md border border-neutral-300 px-3 py-1.5 text-sm focus:border-neutral-500 focus:outline-none"
-              />
-            </div>
-            <div className="flex-1 min-w-[120px]">
-              <label className="block text-xs font-medium text-neutral-600 mb-1">
-                Kategorie
-              </label>
-              <select
-                value={activity}
-                onChange={(e) => setActivity(e.target.value)}
-                className="w-full rounded-md border border-neutral-300 px-3 py-1.5 text-sm focus:border-neutral-500 focus:outline-none"
-              >
-                {ACTIVITIES.map((a) => (
-                  <option key={a.value} value={a.value}>
-                    {a.label}
-                  </option>
-                ))}
-              </select>
-            </div>
-          </div>
-          <div className="flex items-center justify-between">
-            <label className="flex items-center gap-2 text-sm text-neutral-600">
-              <input
-                type="checkbox"
-                checked={billable}
-                onChange={(e) => setBillable(e.target.checked)}
-                className="rounded border-neutral-300"
-              />
-              Abrechenbar
-            </label>
-            <div className="flex gap-2">
-              <button
-                type="button"
-                onClick={() => setShowForm(false)}
-                className="rounded-md px-3 py-1.5 text-sm text-neutral-600 transition-colors hover:bg-neutral-100"
-              >
-                Abbrechen
-              </button>
-              <button
-                type="submit"
-                disabled={createMutation.isPending}
-                className="rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:opacity-50"
-              >
-                {createMutation.isPending ? "Speichern..." : "Speichern"}
-              </button>
-            </div>
-          </div>
-          {createMutation.isError && (
-            <p className="text-sm text-red-600">Fehler beim Speichern.</p>
-          )}
-        </form>
-      )}
-
-      {/* Entries list */}
-      {entries.length === 0 ? (
-        <div className="flex flex-col items-center py-8 text-center">
-          <div className="rounded-xl bg-neutral-100 p-3">
-            <Timer className="h-5 w-5 text-neutral-400" />
-          </div>
-          <p className="mt-2 text-sm text-neutral-500">
-            Keine Zeiteintraege vorhanden.
-          </p>
-        </div>
-      ) : (
-        <div className="space-y-2">
-          {entries.map((entry) => (
-            <div
-              key={entry.id}
-              className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-3"
-            >
-              <div className="min-w-0 flex-1">
-                <div className="flex items-center gap-2">
-                  <p className="text-sm font-medium text-neutral-900 truncate">
-                    {entry.description}
-                  </p>
-                  {entry.activity && (
-                    <span className="shrink-0 rounded-full bg-neutral-100 px-2 py-0.5 text-xs text-neutral-500">
-                      {ACTIVITIES.find((a) => a.value === entry.activity)?.label ?? entry.activity}
-                    </span>
-                  )}
-                  {!entry.billable && (
-                    <span className="shrink-0 rounded-full bg-neutral-100 px-2 py-0.5 text-xs text-neutral-400">
-                      nicht abrechenbar
-                    </span>
-                  )}
-                  {entry.billed && (
-                    <span className="shrink-0 rounded-full bg-emerald-50 px-2 py-0.5 text-xs text-emerald-700">
-                      abgerechnet
-                    </span>
-                  )}
-                </div>
-                <div className="mt-0.5 flex gap-4 text-xs text-neutral-500">
-                  <span>
-                    {format(new Date(entry.date), "d. MMM yyyy", { locale: de })}
-                  </span>
-                  {entry.hourly_rate && (
-                    <span>{formatAmount(entry.duration_minutes, entry.hourly_rate)}</span>
-                  )}
-                </div>
-              </div>
-              <div className="flex items-center gap-3 ml-4">
-                <span className="text-sm font-medium text-neutral-900 whitespace-nowrap">
-                  {formatDuration(entry.duration_minutes)}
-                </span>
-                {!entry.billed && (
-                  <button
-                    onClick={() => deleteMutation.mutate(entry.id)}
-                    className="rounded-md p-1 text-neutral-400 transition-colors hover:bg-red-50 hover:text-red-600"
-                    title="Loeschen"
-                  >
-                    <Trash2 className="h-3.5 w-3.5" />
-                  </button>
-                )}
-              </div>
-            </div>
-          ))}
-        </div>
-      )}
-    </div>
-  );
-}

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

@@ -1,166 +0,0 @@
-"use client";
-
-import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
-import { api } from "@/lib/api";
-import type { BillingRate } from "@/lib/types";
-import { format } from "date-fns";
-import { de } from "date-fns/locale";
-import { Loader2, Plus } from "lucide-react";
-import { useState } from "react";
-import { Breadcrumb } from "@/components/layout/Breadcrumb";
-
-export default function BillingRatesPage() {
-  const queryClient = useQueryClient();
-  const [showForm, setShowForm] = useState(false);
-  const [rate, setRate] = useState("");
-  const [validFrom, setValidFrom] = useState(format(new Date(), "yyyy-MM-dd"));
-
-  const { data, isLoading } = useQuery({
-    queryKey: ["billing-rates"],
-    queryFn: () =>
-      api.get<{ billing_rates: BillingRate[] }>("/billing-rates"),
-  });
-
-  const upsertMutation = useMutation({
-    mutationFn: (input: { rate: number; valid_from: string; currency: string }) =>
-      api.put<BillingRate>("/billing-rates", input),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["billing-rates"] });
-      setShowForm(false);
-      setRate("");
-    },
-  });
-
-  function handleSubmit(e: React.FormEvent) {
-    e.preventDefault();
-    const rateNum = parseFloat(rate);
-    if (isNaN(rateNum) || rateNum < 0) return;
-    upsertMutation.mutate({
-      rate: rateNum,
-      valid_from: validFrom,
-      currency: "EUR",
-    });
-  }
-
-  const rates = data?.billing_rates ?? [];
-
-  return (
-    <div className="animate-fade-in">
-      <Breadcrumb
-        items={[
-          { label: "Dashboard", href: "/dashboard" },
-          { label: "Einstellungen", href: "/einstellungen" },
-          { label: "Stundensaetze" },
-        ]}
-      />
-
-      <div className="mt-4 flex items-center justify-between">
-        <h1 className="text-lg font-semibold text-neutral-900">
-          Stundensaetze
-        </h1>
-        <button
-          onClick={() => setShowForm(!showForm)}
-          className="inline-flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
-        >
-          <Plus className="h-3.5 w-3.5" />
-          Neuer Satz
-        </button>
-      </div>
-
-      {showForm && (
-        <form
-          onSubmit={handleSubmit}
-          className="mt-4 rounded-md border border-neutral-200 bg-neutral-50 p-4 space-y-3"
-        >
-          <div className="flex flex-wrap gap-3">
-            <div className="flex-1 min-w-[150px]">
-              <label className="block text-xs font-medium text-neutral-600 mb-1">
-                Stundensatz (EUR)
-              </label>
-              <input
-                type="number"
-                min="0"
-                step="0.01"
-                value={rate}
-                onChange={(e) => setRate(e.target.value)}
-                placeholder="z.B. 350.00"
-                className="w-full rounded-md border border-neutral-300 px-3 py-1.5 text-sm focus:border-neutral-500 focus:outline-none"
-                required
-              />
-            </div>
-            <div className="flex-1 min-w-[150px]">
-              <label className="block text-xs font-medium text-neutral-600 mb-1">
-                Gueltig ab
-              </label>
-              <input
-                type="date"
-                value={validFrom}
-                onChange={(e) => setValidFrom(e.target.value)}
-                className="w-full rounded-md border border-neutral-300 px-3 py-1.5 text-sm focus:border-neutral-500 focus:outline-none"
-                required
-              />
-            </div>
-          </div>
-          <div className="flex justify-end gap-2">
-            <button
-              type="button"
-              onClick={() => setShowForm(false)}
-              className="rounded-md px-3 py-1.5 text-sm text-neutral-600 hover:bg-neutral-100"
-            >
-              Abbrechen
-            </button>
-            <button
-              type="submit"
-              disabled={upsertMutation.isPending}
-              className="rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white hover:bg-neutral-800 disabled:opacity-50"
-            >
-              Speichern
-            </button>
-          </div>
-        </form>
-      )}
-
-      {isLoading ? (
-        <div className="flex items-center justify-center py-8">
-          <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
-        </div>
-      ) : rates.length === 0 ? (
-        <div className="mt-8 text-center">
-          <p className="text-sm text-neutral-500">
-            Noch keine Stundensaetze definiert.
-          </p>
-        </div>
-      ) : (
-        <div className="mt-4 space-y-2">
-          {rates.map((r) => (
-            <div
-              key={r.id}
-              className="flex items-center justify-between rounded-md border border-neutral-200 bg-white px-4 py-3"
-            >
-              <div>
-                <p className="text-sm font-medium text-neutral-900">
-                  {r.rate.toFixed(2)} {r.currency}/h
-                </p>
-                <p className="mt-0.5 text-xs text-neutral-500">
-                  {r.user_id ? `Benutzer: ${r.user_id.slice(0, 8)}...` : "Standard (alle Benutzer)"}
-                </p>
-              </div>
-              <div className="text-right text-xs text-neutral-500">
-                <p>
-                  Ab{" "}
-                  {format(new Date(r.valid_from), "d. MMM yyyy", { locale: de })}
-                </p>
-                {r.valid_to && (
-                  <p>
-                    Bis{" "}
-                    {format(new Date(r.valid_to), "d. MMM yyyy", { locale: de })}
-                  </p>
-                )}
-              </div>
-            </div>
-          ))}
-        </div>
-      )}
-    </div>
-  );
-}

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

@@ -0,0 +1,174 @@
+"use client";
+
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import { useParams, useRouter } from "next/navigation";
+import { api } from "@/lib/api";
+import type { DocumentTemplate } from "@/lib/types";
+import { TEMPLATE_CATEGORY_LABELS } from "@/lib/types";
+import { Breadcrumb } from "@/components/layout/Breadcrumb";
+import { TemplateEditor } from "@/components/templates/TemplateEditor";
+import Link from "next/link";
+import {
+  Loader2,
+  Lock,
+  Trash2,
+  FileDown,
+  ArrowRight,
+} from "lucide-react";
+import { toast } from "sonner";
+import { useState } from "react";
+
+export default function TemplateDetailPage() {
+  const { id } = useParams<{ id: string }>();
+  const router = useRouter();
+  const queryClient = useQueryClient();
+  const [isEditing, setIsEditing] = useState(false);
+
+  const { data: template, isLoading } = useQuery({
+    queryKey: ["template", id],
+    queryFn: () => api.get<DocumentTemplate>(`/templates/${id}`),
+  });
+
+  const deleteMutation = useMutation({
+    mutationFn: () => api.delete(`/templates/${id}`),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["templates"] });
+      toast.success("Vorlage gelöscht");
+      router.push("/vorlagen");
+    },
+    onError: () => toast.error("Fehler beim Löschen"),
+  });
+
+  const updateMutation = useMutation({
+    mutationFn: (data: Partial<DocumentTemplate>) =>
+      api.put<DocumentTemplate>(`/templates/${id}`, data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["template", id] });
+      queryClient.invalidateQueries({ queryKey: ["templates"] });
+      toast.success("Vorlage gespeichert");
+      setIsEditing(false);
+    },
+    onError: () => toast.error("Fehler beim Speichern"),
+  });
+
+  if (isLoading) {
+    return (
+      <div className="flex items-center justify-center py-12">
+        <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
+      </div>
+    );
+  }
+
+  if (!template) {
+    return (
+      <div className="py-12 text-center text-sm text-neutral-500">
+        Vorlage nicht gefunden
+      </div>
+    );
+  }
+
+  return (
+    <div className="animate-fade-in space-y-4">
+      <Breadcrumb
+        items={[
+          { label: "Dashboard", href: "/dashboard" },
+          { label: "Vorlagen", href: "/vorlagen" },
+          { label: template.name },
+        ]}
+      />
+
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
+        <div>
+          <div className="flex items-center gap-2">
+            <h1 className="text-lg font-semibold text-neutral-900">
+              {template.name}
+            </h1>
+            {template.is_system && (
+              <Lock className="h-4 w-4 text-neutral-400" aria-label="Systemvorlage" />
+            )}
+          </div>
+          <div className="mt-1 flex items-center gap-2">
+            <span className="rounded-full bg-neutral-100 px-2 py-0.5 text-xs text-neutral-600">
+              {TEMPLATE_CATEGORY_LABELS[template.category] ?? template.category}
+            </span>
+            {template.description && (
+              <span className="text-xs text-neutral-500">
+                {template.description}
+              </span>
+            )}
+          </div>
+        </div>
+
+        <div className="flex items-center gap-2">
+          <Link
+            href={`/vorlagen/${id}/render`}
+            className="flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
+          >
+            <FileDown className="h-3.5 w-3.5" />
+            Dokument erstellen
+            <ArrowRight className="h-3.5 w-3.5" />
+          </Link>
+          {!template.is_system && (
+            <>
+              <button
+                onClick={() => setIsEditing(!isEditing)}
+                className="rounded-md border border-neutral-200 bg-white px-3 py-1.5 text-sm text-neutral-700 transition-colors hover:bg-neutral-50"
+              >
+                {isEditing ? "Abbrechen" : "Bearbeiten"}
+              </button>
+              <button
+                onClick={() => {
+                  if (confirm("Vorlage wirklich löschen?")) {
+                    deleteMutation.mutate();
+                  }
+                }}
+                className="rounded-md border border-red-200 bg-white p-1.5 text-red-600 transition-colors hover:bg-red-50"
+              >
+                <Trash2 className="h-4 w-4" />
+              </button>
+            </>
+          )}
+        </div>
+      </div>
+
+      {isEditing ? (
+        <TemplateEditor
+          template={template}
+          onSave={(data) => updateMutation.mutate(data)}
+          isSaving={updateMutation.isPending}
+        />
+      ) : (
+        <div className="space-y-4">
+          {/* Variables */}
+          {template.variables && template.variables.length > 0 && (
+            <div className="rounded-lg border border-neutral-200 bg-white p-4">
+              <h3 className="mb-2 text-sm font-medium text-neutral-700">
+                Variablen
+              </h3>
+              <div className="flex flex-wrap gap-1.5">
+                {template.variables.map((v: string) => (
+                  <code
+                    key={v}
+                    className="rounded bg-neutral-100 px-1.5 py-0.5 text-xs text-neutral-600"
+                  >
+                    {`{{${v}}}`}
+                  </code>
+                ))}
+              </div>
+            </div>
+          )}
+
+          {/* Content preview */}
+          <div className="rounded-lg border border-neutral-200 bg-white p-6">
+            <h3 className="mb-3 text-sm font-medium text-neutral-700">
+              Vorschau
+            </h3>
+            <div className="prose prose-sm prose-neutral max-w-none whitespace-pre-wrap font-mono text-xs leading-relaxed text-neutral-700">
+              {template.content}
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

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

@@ -0,0 +1,177 @@
+"use client";
+
+import { useQuery, useMutation } from "@tanstack/react-query";
+import { useParams } from "next/navigation";
+import { api } from "@/lib/api";
+import type { DocumentTemplate, Case, RenderResponse } from "@/lib/types";
+import { Breadcrumb } from "@/components/layout/Breadcrumb";
+import {
+  Loader2,
+  FileDown,
+  Copy,
+  Check,
+} from "lucide-react";
+import { useState } from "react";
+import { toast } from "sonner";
+
+export default function RenderTemplatePage() {
+  const { id } = useParams<{ id: string }>();
+  const [selectedCaseId, setSelectedCaseId] = useState("");
+  const [rendered, setRendered] = useState<RenderResponse | null>(null);
+  const [copied, setCopied] = useState(false);
+
+  const { data: template, isLoading: templateLoading } = useQuery({
+    queryKey: ["template", id],
+    queryFn: () => api.get<DocumentTemplate>(`/templates/${id}`),
+  });
+
+  const { data: casesData, isLoading: casesLoading } = useQuery({
+    queryKey: ["cases"],
+    queryFn: () =>
+      api.get<{ data: Case[]; total: number }>("/cases?limit=100"),
+  });
+
+  const cases = casesData?.data ?? [];
+
+  const renderMutation = useMutation({
+    mutationFn: () =>
+      api.post<RenderResponse>(
+        `/templates/${id}/render${selectedCaseId ? `?case_id=${selectedCaseId}` : ""}`,
+      ),
+    onSuccess: (data) => setRendered(data),
+    onError: () => toast.error("Fehler beim Erstellen"),
+  });
+
+  const handleCopy = async () => {
+    if (!rendered) return;
+    await navigator.clipboard.writeText(rendered.content);
+    setCopied(true);
+    toast.success("In Zwischenablage kopiert");
+    setTimeout(() => setCopied(false), 2000);
+  };
+
+  const handleDownload = () => {
+    if (!rendered) return;
+    const blob = new Blob([rendered.content], { type: "text/markdown" });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = `${rendered.name.replace(/\s+/g, "_")}.md`;
+    a.click();
+    URL.revokeObjectURL(url);
+    toast.success("Dokument heruntergeladen");
+  };
+
+  if (templateLoading) {
+    return (
+      <div className="flex items-center justify-center py-12">
+        <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
+      </div>
+    );
+  }
+
+  if (!template) {
+    return (
+      <div className="py-12 text-center text-sm text-neutral-500">
+        Vorlage nicht gefunden
+      </div>
+    );
+  }
+
+  return (
+    <div className="animate-fade-in space-y-4">
+      <Breadcrumb
+        items={[
+          { label: "Dashboard", href: "/dashboard" },
+          { label: "Vorlagen", href: "/vorlagen" },
+          { label: template.name, href: `/vorlagen/${id}` },
+          { label: "Dokument erstellen" },
+        ]}
+      />
+
+      <h1 className="text-lg font-semibold text-neutral-900">
+        Dokument erstellen
+      </h1>
+      <p className="text-sm text-neutral-500">
+        Vorlage &ldquo;{template.name}&rdquo; mit Falldaten befüllen
+      </p>
+
+      {/* Step 1: Select case */}
+      <div className="rounded-lg border border-neutral-200 bg-white p-4">
+        <h3 className="mb-3 text-sm font-medium text-neutral-700">
+          1. Akte auswählen
+        </h3>
+        {casesLoading ? (
+          <Loader2 className="h-4 w-4 animate-spin text-neutral-400" />
+        ) : (
+          <select
+            value={selectedCaseId}
+            onChange={(e) => {
+              setSelectedCaseId(e.target.value);
+              setRendered(null);
+            }}
+            className="w-full rounded-md border border-neutral-200 px-3 py-2 text-sm text-neutral-700 focus:border-neutral-400 focus:outline-none"
+          >
+            <option value="">Ohne Akte (nur Datumsvariablen)</option>
+            {cases.map((c) => (
+              <option key={c.id} value={c.id}>
+                {c.case_number} — {c.title}
+              </option>
+            ))}
+          </select>
+        )}
+      </div>
+
+      {/* Step 2: Render */}
+      <div className="rounded-lg border border-neutral-200 bg-white p-4">
+        <div className="flex items-center justify-between">
+          <h3 className="text-sm font-medium text-neutral-700">
+            2. Vorschau erstellen
+          </h3>
+          <button
+            onClick={() => renderMutation.mutate()}
+            disabled={renderMutation.isPending}
+            className="flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800 disabled:opacity-50"
+          >
+            {renderMutation.isPending ? (
+              <Loader2 className="h-3.5 w-3.5 animate-spin" />
+            ) : (
+              <FileDown className="h-3.5 w-3.5" />
+            )}
+            Vorschau
+          </button>
+        </div>
+
+        {rendered && (
+          <div className="mt-4">
+            <div className="mb-2 flex items-center justify-end gap-2">
+              <button
+                onClick={handleCopy}
+                className="flex items-center gap-1 rounded-md border border-neutral-200 px-2.5 py-1 text-xs text-neutral-600 transition-colors hover:bg-neutral-50"
+              >
+                {copied ? (
+                  <Check className="h-3 w-3" />
+                ) : (
+                  <Copy className="h-3 w-3" />
+                )}
+                {copied ? "Kopiert" : "Kopieren"}
+              </button>
+              <button
+                onClick={handleDownload}
+                className="flex items-center gap-1 rounded-md border border-neutral-200 px-2.5 py-1 text-xs text-neutral-600 transition-colors hover:bg-neutral-50"
+              >
+                <FileDown className="h-3 w-3" />
+                Herunterladen
+              </button>
+            </div>
+            <div className="rounded-lg border border-neutral-200 bg-neutral-50 p-6">
+              <div className="whitespace-pre-wrap font-mono text-xs leading-relaxed text-neutral-700">
+                {rendered.content}
+              </div>
+            </div>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

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

@@ -0,0 +1,46 @@
+"use client";
+
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { useRouter } from "next/navigation";
+import { api } from "@/lib/api";
+import type { DocumentTemplate } from "@/lib/types";
+import { Breadcrumb } from "@/components/layout/Breadcrumb";
+import { TemplateEditor } from "@/components/templates/TemplateEditor";
+import { toast } from "sonner";
+
+export default function NeueVorlagePage() {
+  const router = useRouter();
+  const queryClient = useQueryClient();
+
+  const createMutation = useMutation({
+    mutationFn: (data: Partial<DocumentTemplate>) =>
+      api.post<DocumentTemplate>("/templates", data),
+    onSuccess: (result) => {
+      queryClient.invalidateQueries({ queryKey: ["templates"] });
+      toast.success("Vorlage erstellt");
+      router.push(`/vorlagen/${result.id}`);
+    },
+    onError: () => toast.error("Fehler beim Erstellen"),
+  });
+
+  return (
+    <div className="animate-fade-in space-y-4">
+      <Breadcrumb
+        items={[
+          { label: "Dashboard", href: "/dashboard" },
+          { label: "Vorlagen", href: "/vorlagen" },
+          { label: "Neue Vorlage" },
+        ]}
+      />
+
+      <h1 className="text-lg font-semibold text-neutral-900">
+        Neue Vorlage erstellen
+      </h1>
+
+      <TemplateEditor
+        onSave={(data) => createMutation.mutate(data)}
+        isSaving={createMutation.isPending}
+      />
+    </div>
+  );
+}

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

@@ -0,0 +1,121 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import type { DocumentTemplate } from "@/lib/types";
+import { TEMPLATE_CATEGORY_LABELS } from "@/lib/types";
+import { Breadcrumb } from "@/components/layout/Breadcrumb";
+import Link from "next/link";
+import { FileText, Plus, Loader2, Lock } from "lucide-react";
+import { useState } from "react";
+
+const CATEGORIES = ["", "schriftsatz", "vertrag", "korrespondenz", "intern"];
+
+export default function VorlagenPage() {
+  const [category, setCategory] = useState("");
+
+  const { data, isLoading } = useQuery({
+    queryKey: ["templates", category],
+    queryFn: () =>
+      api.get<{ data: DocumentTemplate[]; total: number }>(
+        `/templates${category ? `?category=${category}` : ""}`,
+      ),
+  });
+
+  const templates = data?.data ?? [];
+
+  return (
+    <div className="animate-fade-in space-y-4">
+      <div>
+        <Breadcrumb
+          items={[
+            { label: "Dashboard", href: "/dashboard" },
+            { label: "Vorlagen" },
+          ]}
+        />
+        <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
+          <div>
+            <h1 className="text-lg font-semibold text-neutral-900">
+              Vorlagen
+            </h1>
+            <p className="mt-0.5 text-sm text-neutral-500">
+              Dokumentvorlagen mit automatischer Befüllung
+            </p>
+          </div>
+          <Link
+            href="/vorlagen/neu"
+            className="flex items-center gap-1.5 rounded-md bg-neutral-900 px-3 py-1.5 text-sm font-medium text-white transition-colors hover:bg-neutral-800"
+          >
+            <Plus className="h-3.5 w-3.5" />
+            Neue Vorlage
+          </Link>
+        </div>
+      </div>
+
+      {/* Category filter */}
+      <div className="flex gap-1.5 overflow-x-auto">
+        {CATEGORIES.map((cat) => (
+          <button
+            key={cat}
+            onClick={() => setCategory(cat)}
+            className={`whitespace-nowrap rounded-md px-3 py-1.5 text-sm transition-colors ${
+              category === cat
+                ? "bg-neutral-900 font-medium text-white"
+                : "bg-white text-neutral-600 ring-1 ring-neutral-200 hover:bg-neutral-50"
+            }`}
+          >
+            {cat === "" ? "Alle" : TEMPLATE_CATEGORY_LABELS[cat] ?? cat}
+          </button>
+        ))}
+      </div>
+
+      {isLoading ? (
+        <div className="flex items-center justify-center py-12">
+          <Loader2 className="h-5 w-5 animate-spin text-neutral-400" />
+        </div>
+      ) : templates.length === 0 ? (
+        <div className="flex flex-col items-center justify-center rounded-lg border border-dashed border-neutral-300 py-12 text-center">
+          <FileText className="mb-2 h-8 w-8 text-neutral-300" />
+          <p className="text-sm text-neutral-500">Keine Vorlagen gefunden</p>
+        </div>
+      ) : (
+        <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-3">
+          {templates.map((t) => (
+            <Link
+              key={t.id}
+              href={`/vorlagen/${t.id}`}
+              className="group rounded-lg border border-neutral-200 bg-white p-4 transition-colors hover:border-neutral-300 hover:shadow-sm"
+            >
+              <div className="flex items-start justify-between">
+                <div className="flex items-center gap-2">
+                  <FileText className="h-4 w-4 text-neutral-400" />
+                  <h3 className="text-sm font-medium text-neutral-900 group-hover:text-neutral-700">
+                    {t.name}
+                  </h3>
+                </div>
+                {t.is_system && (
+                  <Lock className="h-3.5 w-3.5 text-neutral-300" aria-label="Systemvorlage" />
+                )}
+              </div>
+              {t.description && (
+                <p className="mt-1.5 text-xs text-neutral-500 line-clamp-2">
+                  {t.description}
+                </p>
+              )}
+              <div className="mt-3 flex items-center gap-2">
+                <span className="rounded-full bg-neutral-100 px-2 py-0.5 text-xs text-neutral-600">
+                  {TEMPLATE_CATEGORY_LABELS[t.category] ?? t.category}
+                </span>
+                {t.is_system && (
+                  <span className="rounded-full bg-blue-50 px-2 py-0.5 text-xs text-blue-600">
+                    System
+                  </span>
+                )}
+              </div>
+            </Link>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/layout/Sidebar.tsx

@@ -9,9 +9,9 @@ import {
   Calendar,
   Brain,
   Settings,
+  FileText,
   Menu,
   X,
-  Receipt,
 } from "lucide-react";
 import { useState, useEffect } from "react";
 import { usePermissions } from "@/lib/hooks/usePermissions";
@@ -28,7 +28,7 @@ const allNavigation: NavItem[] = [
   { name: "Akten", href: "/cases", icon: FolderOpen },
   { name: "Fristen", href: "/fristen", icon: Clock },
   { name: "Termine", href: "/termine", icon: Calendar },
-  { name: "Abrechnung", href: "/abrechnung", icon: Receipt, permission: "manage_billing" },
+  { name: "Vorlagen", href: "/vorlagen", icon: FileText },
   { name: "AI Analyse", href: "/ai/extract", icon: Brain, permission: "ai_extraction" },
   { name: "Einstellungen", href: "/einstellungen", icon: Settings, permission: "manage_settings" },
 ];

frontend/src/components/templates/TemplateEditor.tsx

@@ -0,0 +1,161 @@
+"use client";
+
+import type { DocumentTemplate } from "@/lib/types";
+import { TEMPLATE_CATEGORY_LABELS } from "@/lib/types";
+import { Loader2, Plus } from "lucide-react";
+import { useState, useRef } from "react";
+
+const AVAILABLE_VARIABLES = [
+  { group: "Akte", vars: ["case.number", "case.title", "case.court", "case.court_ref"] },
+  { group: "Parteien", vars: ["party.claimant.name", "party.defendant.name", "party.claimant.representative", "party.defendant.representative"] },
+  { group: "Kanzlei", vars: ["tenant.name", "tenant.address"] },
+  { group: "Benutzer", vars: ["user.name", "user.email"] },
+  { group: "Datum", vars: ["date.today", "date.today_long"] },
+  { group: "Frist", vars: ["deadline.title", "deadline.due_date"] },
+];
+
+interface Props {
+  template?: DocumentTemplate;
+  onSave: (data: Partial<DocumentTemplate>) => void;
+  isSaving: boolean;
+}
+
+export function TemplateEditor({ template, onSave, isSaving }: Props) {
+  const [name, setName] = useState(template?.name ?? "");
+  const [description, setDescription] = useState(template?.description ?? "");
+  const [category, setCategory] = useState<string>(template?.category ?? "schriftsatz");
+  const [content, setContent] = useState(template?.content ?? "");
+  const textareaRef = useRef<HTMLTextAreaElement>(null);
+
+  const insertVariable = (variable: string) => {
+    const el = textareaRef.current;
+    if (!el) return;
+
+    const placeholder = `{{${variable}}}`;
+    const start = el.selectionStart;
+    const end = el.selectionEnd;
+    const newContent =
+      content.substring(0, start) + placeholder + content.substring(end);
+    setContent(newContent);
+
+    // Restore cursor position after the inserted text
+    requestAnimationFrame(() => {
+      el.focus();
+      el.selectionStart = el.selectionEnd = start + placeholder.length;
+    });
+  };
+
+  const handleSave = () => {
+    if (!name.trim()) return;
+    onSave({
+      name: name.trim(),
+      description: description.trim() || undefined,
+      category: category as DocumentTemplate["category"],
+      content,
+      variables: AVAILABLE_VARIABLES.flatMap((g) => g.vars).filter((v) =>
+        content.includes(`{{${v}}}`),
+      ),
+    });
+  };
+
+  return (
+    <div className="space-y-4">
+      {/* Metadata */}
+      <div className="grid gap-3 rounded-lg border border-neutral-200 bg-white p-4 sm:grid-cols-2">
+        <div>
+          <label className="mb-1 block text-xs font-medium text-neutral-600">
+            Name
+          </label>
+          <input
+            type="text"
+            value={name}
+            onChange={(e) => setName(e.target.value)}
+            placeholder="z.B. Klageerwiderung"
+            className="w-full rounded-md border border-neutral-200 px-3 py-2 text-sm focus:border-neutral-400 focus:outline-none"
+          />
+        </div>
+        <div>
+          <label className="mb-1 block text-xs font-medium text-neutral-600">
+            Kategorie
+          </label>
+          <select
+            value={category}
+            onChange={(e) => setCategory(e.target.value)}
+            className="w-full rounded-md border border-neutral-200 px-3 py-2 text-sm focus:border-neutral-400 focus:outline-none"
+          >
+            {Object.entries(TEMPLATE_CATEGORY_LABELS).map(([key, label]) => (
+              <option key={key} value={key}>
+                {label}
+              </option>
+            ))}
+          </select>
+        </div>
+        <div className="sm:col-span-2">
+          <label className="mb-1 block text-xs font-medium text-neutral-600">
+            Beschreibung
+          </label>
+          <input
+            type="text"
+            value={description}
+            onChange={(e) => setDescription(e.target.value)}
+            placeholder="Optionale Beschreibung"
+            className="w-full rounded-md border border-neutral-200 px-3 py-2 text-sm focus:border-neutral-400 focus:outline-none"
+          />
+        </div>
+      </div>
+
+      {/* Variable toolbar */}
+      <div className="rounded-lg border border-neutral-200 bg-white p-4">
+        <h3 className="mb-2 text-xs font-medium text-neutral-600">
+          Variablen einfügen
+        </h3>
+        <div className="space-y-2">
+          {AVAILABLE_VARIABLES.map((group) => (
+            <div key={group.group} className="flex flex-wrap items-center gap-1.5">
+              <span className="text-xs font-medium text-neutral-400 w-16 shrink-0">
+                {group.group}
+              </span>
+              {group.vars.map((v) => (
+                <button
+                  key={v}
+                  onClick={() => insertVariable(v)}
+                  className="flex items-center gap-0.5 rounded bg-neutral-100 px-1.5 py-0.5 text-xs text-neutral-600 transition-colors hover:bg-neutral-200"
+                >
+                  <Plus className="h-2.5 w-2.5" />
+                  {v}
+                </button>
+              ))}
+            </div>
+          ))}
+        </div>
+      </div>
+
+      {/* Content editor */}
+      <div className="rounded-lg border border-neutral-200 bg-white p-4">
+        <label className="mb-2 block text-xs font-medium text-neutral-600">
+          Inhalt (Markdown)
+        </label>
+        <textarea
+          ref={textareaRef}
+          value={content}
+          onChange={(e) => setContent(e.target.value)}
+          rows={24}
+          placeholder="# Dokumenttitel&#10;&#10;Schreiben Sie hier den Vorlageninhalt...&#10;&#10;Verwenden Sie {{variablen}} für automatische Befüllung."
+          className="w-full rounded-md border border-neutral-200 px-3 py-2 font-mono text-sm leading-relaxed focus:border-neutral-400 focus:outline-none"
+        />
+      </div>
+
+      {/* Save button */}
+      <div className="flex justify-end">
+        <button
+          onClick={handleSave}
+          disabled={!name.trim() || isSaving}
+          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:opacity-50"
+        >
+          {isSaving && <Loader2 className="h-3.5 w-3.5 animate-spin" />}
+          {template ? "Speichern" : "Vorlage erstellen"}
+        </button>
+      </div>
+    </div>
+  );
+}

frontend/src/lib/types.ts

@@ -223,72 +223,31 @@ export const CASE_ASSIGNMENT_ROLE_LABELS: Record<CaseAssignmentRole, string> = {
   viewer: "Einsicht",
 };
 
-// Time tracking & billing
+// Document Templates
-
+export interface DocumentTemplate {
-export interface TimeEntry {
   id: string;
-  tenant_id: string;
+  tenant_id?: string;
-  case_id: string;
+  name: string;
-  user_id: string;
+  description?: string;
-  date: string;
+  category: "schriftsatz" | "vertrag" | "korrespondenz" | "intern";
-  duration_minutes: number;
+  content: string;
-  description: string;
+  variables: string[];
-  activity?: string;
+  is_system: boolean;
-  billable: boolean;
-  billed: boolean;
-  invoice_id?: string;
-  hourly_rate?: number;
   created_at: string;
   updated_at: string;
 }
 
-export interface BillingRate {
+export const TEMPLATE_CATEGORY_LABELS: Record<string, string> = {
-  id: string;
+  schriftsatz: "Schriftsatz",
-  tenant_id: string;
+  vertrag: "Vertrag",
-  user_id?: string;
+  korrespondenz: "Korrespondenz",
-  rate: number;
+  intern: "Intern",
-  currency: string;
+};
-  valid_from: string;
-  valid_to?: string;
-  created_at: string;
-}
 
-export interface InvoiceItem {
+export interface RenderResponse {
-  description: string;
+  content: string;
-  duration_minutes?: number;
+  template_id: string;
-  hourly_rate?: number;
+  name: string;
-  amount: number;
-  time_entry_id?: string;
-}
-
-export interface Invoice {
-  id: string;
-  tenant_id: string;
-  case_id: string;
-  invoice_number: string;
-  client_name: string;
-  client_address?: string;
-  items: InvoiceItem[];
-  subtotal: number;
-  tax_rate: number;
-  tax_amount: number;
-  total: number;
-  status: "draft" | "sent" | "paid" | "cancelled";
-  issued_at?: string;
-  due_at?: string;
-  paid_at?: string;
-  notes?: string;
-  created_by: string;
-  created_at: string;
-  updated_at: string;
-}
-
-export interface TimeEntrySummary {
-  group_key: string;
-  total_minutes: number;
-  billable_minutes: number;
-  total_amount: number;
-  entry_count: number;
 }
 
 // Notifications
@@ -298,33 +257,31 @@ export interface Notification {
   user_id: string;
   type: string;
   title: string;
+  message: string;
   body?: string;
   entity_type?: string;
   entity_id?: string;
-  sent_at?: string;
+  read: boolean;
   read_at?: string;
   created_at: string;
 }
 
+export interface NotificationListResponse {
+  data: Notification[];
+  notifications: Notification[];
+  total: number;
+  unread_count: number;
+}
+
 export interface NotificationPreferences {
-  user_id: string;
-  tenant_id: string;
   deadline_reminder_days: number[];
   email_enabled: boolean;
   daily_digest: boolean;
-  created_at: string;
-  updated_at: string;
 }
 
-export interface NotificationListResponse {
+// Audit Log
-  notifications: Notification[];
-  data: Notification[];
-  total: number;
-}
-
-// Audit log
 export interface AuditLogEntry {
-  id: number;
+  id: string;
   tenant_id: string;
   user_id?: string;
   action: string;