sync: features from private repo (2025-12-24)

Synced from ra-h private repo:
- Collapsible chat panel (Cmd+\)
- FolderViewOverlay with Kanban/Grid/List views
- Updated agent prompts
- Improved executor and quickAdd services
- New views.ts types

Files kept at OS versions (auth/backend deps):
- SettingsModal, RAHChat, useSSEChat
- Delegation tools and wiseRAHExecutor
- openExternalUrl (no Tauri)

Added stub: supabaseTokenRegistry.ts for compatibility

src/components/focus/FocusPanel.tsx

@@ -1040,7 +1040,7 @@ export default function FocusPanel({ openTabs, activeTab, onTabSelect, onNodeCli
     <>
     <div style={{ height: '100%', display: 'flex', flexDirection: 'column', background: '#000' }}>
       {/* Tab Bar */}
-      <div style={{ 
+      <div style={{
         display: 'flex',
         borderBottom: '1px solid #333',
         background: '#0a0a0a',