magicNovel 0.3.0

Typewriter and UI sound feedback; tour card placement; dark hover fix

- WebAudio-synthesized sound feedback (no audio assets): typewriter
  keystrokes with per-key variation, space thock and carriage-return
  bell in the editor; soft ticks on every button, rounder clicks on
  switches; success/error cues for Muse replies and translations.
  Toggles and volume in Settings > Editor > Sound.
- Tour cards now place beside full-height panels (sidebar, Muse)
  instead of sliding off-screen; always clamped to the viewport.
- Dark mode: pill/send buttons no longer flip to black-on-black on
  hover (hover:bg-black -> theme-aware ink/85).