note palette: swatch previews body palette, NVM reverts, OK saves sitewide; note_set_palette also saves user.palette — TDD

- note-page.js: body class swap on swatch click; 10s auto-revert timer; NVM reverts;
  .note-item--active persists border/glow while modal open; .previewing on swatch
- billboard/views.py: note_set_palette also saves user.palette via _unlocked_palettes_for_user
- _note.scss: .note-swatch-body gradient (palette vars cascade from parent palette-* class);
  .previewing state; .note-item--active; note-palette-modal tooltip glass;
  note-palette-confirm floats below modal (position:absolute, out of flow)
- my_notes.html: note-item__body wrapper; image-box right; swatch row OK buttons removed
- FTs: T2a URL fix (/recognition → /my-notes); T2b split into preview+persist & NVM tests;
  NoteSetPaletteViewTest.test_also_saves_user_palette IT

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Sonnet 4.6 <noreply@anthropic.com>

src/templates/apps/billboard/my_notes.html

@@ -12,22 +12,23 @@
         <li class="note-item" data-slug="{{ item.obj.slug }}"
             data-set-palette-url="{% url 'billboard:note_set_palette' item.obj.slug %}">
 
+            <div class="note-item__body">
+                <p class="note-item__title">{{ item.title }}</p>
+                <p class="note-item__description">{{ item.description }}</p>
+            </div>
+
             {% if item.obj.palette %}
             <div class="note-item__palette {{ item.obj.palette }}"></div>
             {% else %}
             <div class="note-item__image-box">?</div>
             {% endif %}
 
-            <p class="note-item__title">{{ item.title }}</p>
-            <p class="note-item__description">{{ item.description }}</p>
-
             {% if not item.obj.palette and item.palette_options %}
             <template class="note-palette-modal-tpl">
                 <div class="note-palette-modal">
                     {% for palette_name in item.palette_options %}
                     <div class="{{ palette_name }}">
                         <div class="note-swatch-body"></div>
-                        <button type="button" class="btn btn-confirm">OK</button>
                     </div>
                     {% endfor %}
                     <div class="note-palette-confirm" hidden>