Complete editable fields whitelists for all remaining AE objects

- Created .editable_fields.ts files for Journals, Events, and Sponsorships modules
- Standardized the whitelist pattern across the entire codebase
- Updated TODO.md and GEMINI.md with recent accomplishments and learnings

src/lib/ae_journals/ae_journals__journal.editable_fields.ts

@@ -0,0 +1,32 @@
+export const editable_fields__journal = [
+    'code',
+    'type_code',
+    'name',
+    'short_name',
+    'summary',
+    'outline',
+    'description',
+    'description_html',
+    'description_json',
+    'timezone',
+    'alert',
+    'alert_msg',
+    'sort_by',
+    'sort_by_desc',
+    'cfg_json',
+    'data_json',
+    'passcode_read',
+    'passcode_read_expire',
+    'passcode_write',
+    'passcode_write_expire',
+    'passcode',
+    'passcode_timeout',
+    'private_passcode',
+    'auth_key',
+    'enable',
+    'hide',
+    'priority',
+    'sort',
+    'group',
+    'notes'
+];