Dashboard v2: remove old Kanban, add Status bar, collapsible sections

- Added Status bar from old kanban (ANAF, Git, Cron)
- All sections now collapsible (Status, Activity, Issues)
- Removed Kanban from navigation
- Removed kanban.html file
- Status bar collapsed by default

kanban/notes.html

@@ -482,7 +482,7 @@
         
         const notesCache = {};
         let notesIndex = [];
-        const notesBasePath = "youtube-notes/";
+        const notesBasePath = "notes-data/";
         const indexPath = notesBasePath + "index.json";
         
         // Load notes index from JSON