refactor(core): consolidate logic and modernize imports

- Unified Person and User logic into ae_core__* counterparts and marked legacy files.
- Renamed Activity Log to ae_core__activity_log.ts for naming consistency.
- Updated all core function imports across the identity, logs, and video conference modules.
- Fixed missing 'prefix' field in Person form payload and corrected return types in Activity Log.
- Updated project TODO to reflect completed core module refinements.

TODO.md

@@ -60,12 +60,16 @@ This is a list of tasks to be completed before the next event/show/conference.
 
 ## Core Module Improvements
 
-- [ ] **Person Management:**
-    - [ ] Create dedicated page/form for creating/editing person records.
-    - [ ] Finalize Person-User linking.
-- [ ] **Address & Contact Management:**
-    - [ ] Implement full V3 CRUD UI (currently placeholders).
-    - [ ] Create dynamic detail routes.
+- [x] **Person Management:**
+    - [x] Create dedicated page/form for creating/editing person records. (Standardized 2026-01-15)
+    - [x] Finalize Person-User linking. (UI implemented in [person_id]/+page.svelte)
+- [x] **Address & Contact Management:**
+    - [x] Implement full V3 CRUD UI (Standardized 2026-01-15).
+    - [x] Create dynamic detail routes.
+- [x] **Logic Consolidation:**
+    - [x] Merged legacy logic files into modern `ae_core__*` counterparts.
+    - [x] Renamed Activity Log to `ae_core__activity_log.ts` for consistency.
+    - [x] Unified Person-User logic and ensured correct Triple-ID / V3 helper usage.
 
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