docs: document service worker fix, events sort encoding, and slct account_id pattern

BOOTSTRAP__AI_Agent_Quickstart.md:
- Mistake #15 addendum: events/session modules use legacy tmp_sort_1 encoding
  (priority=true→'1'), not build_tmp_sort — requires descending sort until migrated
- Mistake #16 (new): service worker without skipWaiting+clients.claim silently serves
  stale code to long-lived tabs; explains the "can't reproduce in dev" pattern that
  likely caused the IDAA recovery meetings issue for months

CLIENT__IDAA_and_customized_mods.md:
- New "Sort Encoding" section: table of legacy vs build_tmp_sort modules with
  correct comparator direction for each
- New "Search Trigger" section: explains why $slct.account_id not $ae_loc.account_id

TODO__Agents.md:
- IDB Sort: added ae_events__event migration task + legacy encoding warning
- DevOps: marked service worker fix complete; replaced nginx caching item with
  proxy buffer tuning task

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

documentation/TODO__Agents.md

@@ -43,6 +43,15 @@ The app uses `svelte-persisted-store` (coarse reactivity). Migration target: rep
 ### [Data Layer] IDB sorting + content version rollout
 Sorting baseline is now `build_tmp_sort` (ASC chain, no `.reverse()` on tmp-sort lists).
 
+**⚠️ Exception:** `ae_events__event.ts` and `ae_events__event_session.ts` use **legacy encoding**
+(`priority ? 1 : 0`, priority=true→`'1'`). Their sort comparators must remain **descending**
+until the modules are migrated to `build_tmp_sort`. `ae_events__event_presentation.ts` already
+uses `build_tmp_sort` (overrides generic encoding in its `specific_processor`). See
+`CLIENT__IDAA_and_customized_mods.md` → "Sort Encoding" for full table.
+
+- [ ] **[IDB Sort] Migrate `ae_events__event.ts` to `build_tmp_sort`** — requires bumping
+  `IDB_CONTENT_VERSIONS.events.event` (currently v3) and switching all event sort comparators
+  to ascending. Check all pages that sort events before doing this.
 - [ ] **[IDB Sort] Roll out to `ae_events__event_session`** after sort behavior review.
 - [ ] **[IDB Sort] Roll out to `ae_events__event_presenter`** after sort behavior review.
 - [ ] **[IDB Sort] Roll out to `ae_events__event_location`** after sort behavior review.
@@ -73,7 +82,13 @@ Sorting baseline is now `build_tmp_sort` (ASC chain, no `.reverse()` on tmp-sort
   backend field (restoring global/cross-device persistence). Frontend code is in
   `launcher_file_cont.svelte` — search for `file_display_overrides`.
 - [ ] **[Backend] Re-add `Access-Control-Allow-Private-Network: true` CORS header.**
-- [ ] **[DevOps] Nginx caching** — Investigate `index.html` cache-pickup issues.
+- [x] **[DevOps] Service worker `skipWaiting` + `clients.claim`** — Root cause of "users see
+  old code / can't reproduce in dev testing": the SW sat in waiting state until all tabs closed.
+  IDAA members leave idaa.org open all day. Fixed 2026-06-03: both calls added to
+  `src/service-worker.js`. See mistake #16 in `BOOTSTRAP__AI_Agent_Quickstart.md`.
+- [ ] **[DevOps] Nginx proxy buffer tuning** — Buffer settings copied from PHP guide; not
+  optimal for Node.js. `proxy_busy_buffers_size` technically exceeds safe limit. Re-examine
+  when enabling compression (now re-enabled) stabilizes.
 - [ ] **[DevOps] Simplify Dockerfile env file selection** — Use plain `.env` instead of `BUILD_MODE`.
 
 ---