fix(offline): include provided in RTKQ rehydration payload

RTK Query 2.12's invalidation slice reads `provided.tags` during cache
rehydration (`Object.entries(provided.tags ?? {})`). Our persisted
snapshot only carried `{ queries, mutations }`, so `provided` was
undefined and `.tags` threw on every startup with a cached snapshot —
crashing the app inside the rehydrate reducer / immer produce.

Snapshot now carries the real `provided` (so invalidation tags
rehydrate), and `load()` defaults it to `{ tags: {}, keys: {} }` so
snapshots persisted before this field existed recover without a manual
localStorage clear.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/api/rehydrate.ts

@@ -15,6 +15,11 @@ export const REHYDRATE_API = 'api/rehydrate';
 export interface RehydrateApiPayload {
   queries: Record<string, unknown>;
   mutations: Record<string, unknown>;
+  // RTKQ's invalidation slice reads `provided.tags`/`provided.keys` during
+  // rehydration (it does `Object.entries(provided.tags ?? {})`), so `provided`
+  // must be an object — a bare `{ queries, mutations }` makes it crash on
+  // `provided.tags` of undefined. Always present; empty objects are valid.
+  provided: { tags: Record<string, unknown>; keys: Record<string, unknown> };
 }
 
 export const rehydrateApi = createAction<RehydrateApiPayload>(REHYDRATE_API);