- font-mono-label: font-weight 500, remove letter-spacing
- NoteList: move timestamp below snippet in note items
- Sidebar: add border-r with sidebar-border color
- ResizeHandle: overlap sidebar border with -ml-1 (no visible gap)
- Sidebar items: text-muted-foreground for inactive group items
- NoteList: uniform 14px vertical padding across all note items
- NoteList header: fixed height 45px to match tab bar