Merge lane/planung in feature/craftvia-mvp

Konflikte gelöst (additiv): Benachrichtigungstexte (Zeiterfassung + Planung, JSON zusammengeführt),
Event-Typen, Navigation, Empfänger-Felder, handle-event (reason inkl. rejectionReason + Planungsfelder),
Smoke-Prüfungen (Teamleiter: Zeiten + Planung).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/lib/nav.ts

@@ -15,6 +15,9 @@ import {
   Siren,
   Compass,
   Timer,
+  CalendarRange,
+  LayoutGrid,
+  MapPinned,
   type LucideIcon,
 } from "lucide-react";
 import type { ModuleKey } from "@/lib/modules";
@@ -38,10 +41,18 @@ export interface NavItem {
   module?: ModuleKey;
   permissions?: readonly Permission[];
   section: "main" | "admin";
+  /** L13: indented sub entry of the preceding item */
+  sub?: boolean;
+  /** L13: active only on exactly this path (not on sub paths) */
+  exact?: boolean;
 }
 
 export const NAV_ITEMS: readonly NavItem[] = [
   { href: "/dashboard", label: "dashboard", icon: LayoutDashboard, section: "main" },
+  // L13 Planung: top-level entry with sub entries; backoffice (read_all) + team leads (report:approve_team, own crews read-only)
+  { href: "/planning", label: "planning", icon: CalendarRange, module: "work_orders", permissions: ["work_order:read_all", "report:approve_team"], section: "main" },
+  { href: "/planning", label: "planningBoard", icon: LayoutGrid, module: "work_orders", permissions: ["work_order:read_all", "report:approve_team"], section: "main", sub: true, exact: true },
+  { href: "/planning/live", label: "planningLive", icon: MapPinned, module: "work_orders", permissions: ["work_order:read_all", "report:approve_team"], section: "main", sub: true },
   {
     href: "/work-orders",
     label: "workOrders",