Feat v0.4.5 editor modes + document outline

Tri-state viewMode (rendered/edit/split) replaces binary preview toggle.
Split view uses CSS grid with synced scroll. Document outline panel parses
headings and supports click-to-scroll in both CM6 and preview. Mode
preference persisted to localStorage. Notes package bumped to v0.6.0.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/notes/manifest.json

@@ -6,9 +6,9 @@
   "route": "/s/notes",
   "auth": "authenticated",
   "layout": "single",
-  "version": "0.5.0",
+  "version": "0.6.0",
   "icon": "📝",
-  "description": "Markdown notes surface with rich editor, folders, tags, backlinks, and import/export.",
+  "description": "Markdown notes surface with rich editor, folders, tags, backlinks, import/export, and document outline.",
   "author": "switchboard",
 
   "permissions": ["db.write"],
@@ -92,6 +92,12 @@
       "label": "Default View",
       "description": "Default note list view: recent or pinned",
       "default": "recent"
+    },
+    "editor_mode": {
+      "type": "string",
+      "label": "Default Editor Mode",
+      "description": "How notes open: rendered (read-only preview), edit (CodeMirror editor), or split (side-by-side)",
+      "default": "rendered"
     }
   }
 }