feat: platform backbone and field capture, first part (checkpoint)

Platform backbone (plan 2026-10-13-plattform-rueckgrat), reviewed tasks:
- run roles api/worker/job/all with shared startup checks (Task 1)
- schema and migration for DomainEvent, deliveries, JobRun, ThrottlerHit (Task 2)
- audit, notifications and domain events written in the same transaction (Task 3)
- dispatcher with SKIP LOCKED claims, retries and stale release (Task 4)
- worker building blocks: tick, LISTEN/NOTIFY wake-up, health (Task 5)
- worker process and entry points (Task 6)
- throttler counters in Postgres (Task 19)
- separate keys per purpose with key ring (Task 20)
- public origin page without exact location (Task 22)
- shop keys split into read and write (Task 23)
- Kustomize base, components, overlay encry, CI validation (Task 26)

Field capture T3 (plan 2026-10-13-t3-erfassung-am-stand), reviewed tasks:
- brood frames, read endpoints, apiary overview and offline pack
- network basics, offline queue v3, navigation sheets, form building blocks
- new inspection with last-time hints and weather, varroa per day,
  treatment prefill, apiary page with round
- inspection photo (Task 10) is implemented, review pending

Not rolled out. Remaining tasks follow in later commits.

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

ApiCore-Frontend/src/app/providers.tsx

@@ -2,11 +2,26 @@
 
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { useEffect, useState } from "react";
+import { ApiError } from "@/lib/auth/api-client";
 import { AuthProvider } from "@/lib/auth/auth-context";
 import { applyMotionLevel, readMotionLevel } from "@/lib/motion/motion-preference";
 
 export function Providers({ children }: { children: React.ReactNode }) {
-  const [queryClient] = useState(() => new QueryClient());
+  const [queryClient] = useState(
+    () =>
+      new QueryClient({
+        defaultOptions: {
+          // offlineFirst: serve cache / try the request even without a network
+          // signal; 'always' mutations run so forms can queue instead of hanging.
+          queries: {
+            networkMode: "offlineFirst",
+            retry: (failureCount, error) =>
+              !(error instanceof ApiError && error.status < 500) && failureCount < 1,
+          },
+          mutations: { networkMode: "always", retry: false },
+        },
+      }),
+  );
 
   useEffect(() => {
     applyMotionLevel(readMotionLevel());