fix(idaa): resolve ~1-year 'no meetings found' bug on recovery meetings page

Root cause: stale IDB records from prior deploys persisted indefinitely.
Fast path returned 0 (account_id mismatch), API errored silently, and the
error state showed the same message as a genuinely empty result — making
the failure indistinguishable from real data.

Fix is layered defense:
- Bump IDB_CONTENT_VERSIONS.events.event to 2 (one-time force-clear for all users)
- Add check_and_clear_idb_table() helper to store_versions.ts; wire it in
  (idaa)/+layout.svelte to catch future version mismatches on session start
- One silent auto-retry (3s) on API failure before surfacing error UI
- Distinct error state (Unable to load meetings) separate from empty state
- Escape-hatch cache-reset button after 8s when zero results + no active filters
- Document root cause and fix in README.md and BOOTSTRAP__AI_Agent_Quickstart.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/routes/idaa/(idaa)/+layout.svelte

@@ -21,6 +21,7 @@ import { idaa_loc, idaa_sess, idaa_slct } from '$lib/stores/ae_idaa_stores';
 import { db_posts } from '$lib/ae_posts/db_posts';
 import { db_archives } from '$lib/ae_archives/db_archives';
 import { db_events } from '$lib/ae_events/db_events';
+import { check_and_clear_idb_table } from '$lib/stores/store_versions';
 
 interface Props {
     /** @type {import('./$types').LayoutData} */
@@ -63,6 +64,22 @@ let verify_in_flight = false;
 // Storing the failed UUID means only that exact UUID is skipped; any other UUID is a clean slate.
 let verify_failed_for_uuid: string | null = null;
 
+// Clear stale db_events.event IDB data on IDAA session start.
+//
+// WHY: Stale cached event records were the root cause of the "no meetings found" bug
+// on the IDAA Recovery Meetings page — a ~1-year unresolved issue (fixed 2026-05-16).
+// After a deploy that changed properties_to_save, old IDB records persisted with missing
+// or wrong fields. The search fast path returned 0 results (failed account_id filter),
+// the API call errored silently, and the error state showed the same message as a real
+// empty result — users had no indication anything was wrong.
+//
+// This runs once per IDAA session. On a version match (normal case) it costs one
+// localStorage read. On a mismatch it clears the table; the SWR search re-fetches.
+// To force a clear after a deploy: bump IDB_CONTENT_VERSIONS.events.event in store_versions.ts.
+if (browser) {
+    check_and_clear_idb_table(db_events.event, 'events', 'event').catch(() => {});
+}
+
 // Show a manual reset button if the spinner is still visible after this many ms.
 // Handles the case where site_cfg_json loads without novi_idaa_api_key (stale cache)
 // or the Novi API call hangs — the user would otherwise be stuck with no escape.