v0.6.41

fix: multiple bug fixes and improvements

- Fix onboarding crash: move useMemo inside component (was module-level)
- Fix QWERTY keyboard: bigger keys (42x48), add backspace/enter as action keys, bottom row with space/toggle/arrows, remove separate toolbar
- Fix code editor: regenerate codemirror bundle (was empty placeholder)
- Fix JetBrainsMono in WebView: embed fonts as base64 @font-face (no CDN dependency)
- Bump small font sizes: 10px→11px, 11px→12px across app
- Fix version mismatch: app.json was 0.4.4, now 0.6.41
- Revert versioning convention back to git describe --tags
- Revert release workflow trigger to * pattern