v1.6.33

fix: drop removed clear_liquid_glass, pin window-vibrancy, bump 1.6.33

The macOS universal build failed to compile (E0432): window-vibrancy
0.6.0 has no `clear_liquid_glass` export, and the loose `= "0"` pin let
CI resolve to it. Only macOS broke since the import lives in a
`#[cfg(target_os = "macos")]` block.

- Remove the clear_liquid_glass call (no behavior lost — glass is
  CSS-driven; the clear_* calls only defensively strip native material).
- Pin window-vibrancy to "0.6" so a future minor can't reshuffle the API
  on CI again.
- Bump version to 1.6.33 across package.json, Cargo.toml, tauri.conf.json.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>