feat: T4 wave 4 - rules suggest, takeover, chains, autopilot A1-A3, suggestions page, varroa bands UI

- Automation rules propose suggestions instead of creating tasks;
  notify per rule config; corrected varroa measurements refresh or
  resolve their suggestion
- Inspection values can be taken over into the colony card
  (occupiedFrames 0-40, strength deprecated); warning counts use the
  same visibility rule as the notification list
- Biotech chains: swarm check after queen cells, queen acceptance
  check, split schedules (raise own, queen cell, queen)
- Season autopilot core with A1 inspection due, A2 varroa measurement,
  A3 recheck after treatment; colony sync and daily step
- Frontend: suggestions page with groups, bulk accept, undo, paging,
  focus management and permission gating
- Frontend: varroa traffic light from seasonal bands, sample size,
  one range request for the colony chart
- Notifications: mark-read answers 404 for rows the user may no
  longer see

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Frontend/src/app/(app)/nav-config.ts

@@ -11,6 +11,7 @@ import {
   History,
   Layers,
   LayoutDashboard,
+  Lightbulb,
   ListTodo,
   type LucideIcon,
   MapPin,
@@ -41,6 +42,8 @@ export interface NavItem {
   // together several previously-separate settings pages, each gated by its
   // own permission.
   permission?: string | string[];
+  /** A number shown next to the label; the data comes from the matching hook. */
+  counter?: "suggestions";
 }
 
 export interface NavGroup {
@@ -79,6 +82,13 @@ export const NAV_GROUPS: NavGroup[] = [
     label: "Arbeit",
     items: [
       { label: "Aufgaben", href: "/tasks", icon: ListTodo },
+      {
+        label: "Vorschläge",
+        href: "/suggestions",
+        icon: Lightbulb,
+        permission: "tasks:read",
+        counter: "suggestions",
+      },
       { label: "Kalender", href: "/calendar", icon: CalendarDays },
     ],
   },