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/dashboard/forms.py

@@ -1,32 +1,32 @@
 from django import forms
 from django.core.exceptions import ValidationError
-from .models import Item
+from .models import Line
 
-DUPLICATE_ITEM_ERROR = "You've already logged this to your note"
-EMPTY_ITEM_ERROR = "You can't have an empty note item"
+DUPLICATE_LINE_ERROR = "You've already logged this to your post"
+EMPTY_LINE_ERROR = "You can't have an empty post line"
 
-class ItemForm(forms.Form):
+class LineForm(forms.Form):
     text = forms.CharField(
-        error_messages = {"required": EMPTY_ITEM_ERROR},
+        error_messages = {"required": EMPTY_LINE_ERROR},
         required=True,
     )
 
-    def save(self, for_note):
-        return Item.objects.create(
-            note=for_note,
+    def save(self, for_post):
+        return Line.objects.create(
+            post=for_post,
             text=self.cleaned_data["text"],
         )
 
-class ExistingNoteItemForm(ItemForm):
-    def __init__(self, for_note, *args, **kwargs):
+class ExistingPostLineForm(LineForm):
+    def __init__(self, for_post, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self._for_note = for_note
+        self._for_post = for_post
 
     def clean_text(self):
         text = self.cleaned_data["text"]
-        if self._for_note.item_set.filter(text=text).exists():
-            raise forms.ValidationError(DUPLICATE_ITEM_ERROR)
+        if self._for_post.lines.filter(text=text).exists():
+            raise forms.ValidationError(DUPLICATE_LINE_ERROR)
         return text
 
     def save(self):
-        return super().save(for_note=self._for_note)
+        return super().save(for_post=self._for_post)