Ed L 66dfdf705f Improve UX: welcome screen, vim keybindings, command mode ...

- Welcome overlay shown when model has no categories, listing common
  commands and navigation hints to orient new users
- Vim-style keybindings:
  - i / a → Insert mode (edit cell); Esc → Normal
  - x → clear cell; yy / p → yank / paste
  - G / gg → last / first row; 0 / $ → first / last col
  - Ctrl+D / Ctrl+U → half-page scroll
  - n / N → next / prev search match
  - T → tile-select mode (single key, no Ctrl needed)
  - ZZ → save + quit
  - F / C / V → toggle panels (no Ctrl needed)
  - ? → help (in addition to F1)
- Command mode (:) for vim-style commands:
  :q  :q!  :w [path]  :wq  ZZ
  :import <file.json>  :export [path]
  :add-cat <name>  :add-item <cat> <item>
  :formula <cat> <Name=expr>  :add-view [name]  :help
- Status bar now context-sensitive: shows mode-specific hint text
  instead of always showing the same generic shortcuts
- Mode label changed: "Editing" → "INSERT" to match vim convention
- Title bar shows filename in parentheses when model is backed by a file
- Help widget updated with full key reference in two-column layout

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-03-21 22:41:35 -07:00

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