fix: update docs/todos after v1 edit form retirement + v2 rename

- Update CLIENT__IDAA_and_customized_mods.md: remove v1 entry and v2 suffix
- Update tests/README.md: rename _v2 reference to canonical filename
- Update TODO__Agents.md: mark all state_referenced_locally warnings resolved;
  document remaining 23 CSS @apply warnings as harmless language-service noise

tests/README.md

@@ -91,7 +91,7 @@ console.log(bad.map(el => el.name || el.id));
 
 **Cause:** In Svelte 5, `value={someReactiveExpr}` on an uncontrolled `<input>` or `<select>` is a **one-time set at mount**. If the backing reactive store (`$ae_loc`, `liveQuery`, etc.) is empty when the component first renders, the field gets `value=""` and stays that way — even after the store updates.
 
-**Specific instance fixed:** The `[name="timezone"]` field in `ae_idaa_comp__event_obj_id_edit_v2.svelte` has two branches:
+**Specific instance fixed:** The `[name="timezone"]` field in `ae_idaa_comp__event_obj_id_edit.svelte` has two branches:
 ```svelte
 {#if $ae_loc?.lu_time_zone_list?.length}
     <select name="timezone" required value={...}>  ← renders with value ✓