- intercept Ctrl/Cmd+A to select only the current block's content, preventing cross-block merge bug
- increase slash menu width from 280 to 375 and max-height from 320 to 360
- enlarge icon container, increase gap and padding, and upsize text in slash menu items
- increase menu width and max height constants
- add SHORTCUT_HINT map displaying markdown shortcuts per block type
- update empty state and list container to use rounded-lg and shadow-md
- add section label header above block items
- show monospace shortcut hint on each menu item
- tighten item padding and icon size for denser layout
- move slash menu keyboard listener to document capture phase to prevent contentEditable default behaviors
- use circular navigation for arrow keys in slash menu
- separate undo/redo shortcuts into dedicated global keydown handler
- add adaptive positioning for slash menu with flip-up, horizontal clamp, and max-height constraints
- increase block vertical padding from py-0.5 to py-1.5 for better readability
- increase editor container vertical padding from py-3 to py-6
- show placeholder text only on hover or focus instead of always visible
hykocx