rename: Note→Post/Line (dashboard); Recognition→Note (drama); new-post/my-posts to billboard

- dashboard: Note→Post, Item→Line across models, forms, views, API, urls & tests
- new-post (9×3) & my-posts (3×3) applets migrate from dashboard→billboard context; billboard view passes form & recent_posts
- drama: Recognition→Note, related_name notes; billboard URL /recognition/→/my-notes/, set-palette at /note/<slug>/set-palette
- recognition.js→note.js (module Note, data.note key); recognition-page.js→note-page.js; .recog-*→.note-*
- _recognition.scss→_note.scss; BillNotes page header; applet slug billboard-recognition→billboard-notes (My Notes)
- NoteSpec.js replaces RecognitionSpec.js; test_recognition.py→test_applet_my_notes.py
- 4 migrations applied: dashboard 0004, applets 0011+0012, drama 0005; 683 ITs green

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

src/apps/api/urls.py

@@ -4,8 +4,8 @@ from . import views
 
 
 urlpatterns = [
-    path('notes/', views.NotesAPI.as_view(), name='api_notes'),
-    path('notes/<uuid:note_id>/', views.NoteDetailAPI.as_view(), name='api_note_detail'),
-    path('notes/<uuid:note_id>/items/', views.NoteItemsAPI.as_view(), name='api_note_items'),
+    path('posts/', views.PostsAPI.as_view(), name='api_posts'),
+    path('posts/<uuid:post_id>/', views.PostDetailAPI.as_view(), name='api_post_detail'),
+    path('posts/<uuid:post_id>/lines/', views.PostLinesAPI.as_view(), name='api_post_lines'),
     path('users/', views.UserSearchAPI.as_view(), name='api_users'),
 ]