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)/sidebar.tsx

@@ -4,6 +4,7 @@ import Link from "next/link";
 import { usePathname } from "next/navigation";
 import { FileClock, Hexagon } from "lucide-react";
 import { cn } from "@/lib/utils";
+import { NavCounter } from "@/components/suggestions/nav-counter";
 import type { AuthUser } from "@/lib/auth/auth-context";
 import { isNavActive, type NavItem, visibleNavGroups } from "./nav-config";
 
@@ -28,6 +29,7 @@ function SidebarLink({ item, pathname }: { item: NavItem; pathname: string }) {
         )}
       />
       <span className="truncate">{item.label}</span>
+      {item.counter ? <NavCounter counter={item.counter} active={isActive} /> : null}
     </Link>
   );
 }