load note.js in dashboard _scripts.html so My Sky applet banner works; fix stale new-note applet seeds in FTs

- _scripts.html: add note.js alongside dashboard.js — Note global now available on dashboard
  page, enabling Note.handleSaveResponse from _applet-my-sky.html save handler
- test_dashboard.py: remove stale new-note applet seed (renamed to new-post/billboard)
- test_room_tray.py: remove stale new-note applet seed

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

src/templates/apps/dashboard/_partials/_scripts.html

@@ -1,5 +1,6 @@
 {% load static %}
 <script src="{% static "apps/dashboard/dashboard.js" %}"></script>
+<script src="{% static "apps/dashboard/note.js" %}"></script>
 <script>
     window.onload = () => {
         initialize("#id_text");