fix(release): address code review findings (P1-P3)

P1 fixes (must-fix):
- AppRun: VLC path corrected to usr/lib/app/linux/vlc (jpackage actual
  path), add VLC_PLUGIN_PATH env var for codec discovery
- linuxdeploy: use APPIMAGE_EXTRACT_AND_RUN=1 env var to bypass FUSE
  on CI runners instead of fragile pre-extract + symlink approach
- Prerelease classifier: inverted to positive-match stable format
  (^v[0-9]+\.[0-9]+\.[0-9]+$) across desktop, Android, and composite
  action — eliminates regex drift between allowlists
- assert-stable-release: now accepts inputs (tag, is_prerelease,
  is_draft) so workflow_dispatch on bump workflows also validates

P2 fixes (should-fix):
- .gitignore: add linuxdeploy-*.AppImage and extracted dirs
- RPM version: use replace("-", "~") instead of substringBefore("-")
  for correct RPM prerelease ordering (1.08.0~rc1 < 1.08.0)
- linux-portable → linux alias moved into collect_assets() in
  scripts/asset-name.sh (single source of truth)
- Android cache key: add gradle/libs.versions.toml to hashFiles
- r0adkll/sign-android-release: SHA-pinned to 349ebdef (v1)

P3 fixes (nice-to-have):
- LINUXDEPLOY_OUTPUT_VERSION env var replaced with
  APPIMAGE_EXTRACT_AND_RUN (misleading comment + redundant var)
- nick-fields/retry timeout: 40m → 15m (surface real hangs)
- generate_release_notes: true only on Android job (avoid
  last-writer-wins race across 6 concurrent uploaders)
- apt-get install rpm: tightened guard to matrix.family == 'linux'
  (linux-portable leg doesn't need rpm tooling)

.github/workflows/bump-homebrew.yml

@@ -31,8 +31,11 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Re-assert stable release
-        if: github.event_name == 'release'
         uses: ./.github/actions/assert-stable-release
+        with:
+          tag: ${{ github.event.release.tag_name || inputs.tag }}
+          is_prerelease: ${{ github.event.release.prerelease || 'false' }}
+          is_draft: ${{ github.event.release.draft || 'false' }}
 
       - name: Bump cask (push-or-update PR)
         uses: macauley/action-homebrew-bump-cask@ad984534de44a9489a53aefd81eb77f87c70dc60  # v4.0.0