fix(packaging): compile binary as qbz instead of qbz-nix

Add [[bin]] section to Cargo.toml so cargo produces target/release/qbz
directly. Update all packaging references (workflows, PKGBUILD, Flatpak
manifest, AUR desktop file) to use the new binary name. This fixes DEB
and RPM packages installing the binary as /usr/bin/qbz-nix instead of
/usr/bin/qbz.

packaging/flatpak/com.blitzfc.qbz.yml

@@ -44,21 +44,6 @@ finish-args:
   - --talk-name=org.freedesktop.portal.OpenURI
 
 modules:
-  # alsa-utils for better ALSA device names (aplay -L)
-  - name: alsa-utils
-    buildsystem: autotools
-    config-opts:
-      - --disable-alsamixer
-      - --disable-xmlto
-      - --with-udev-rules-dir=/app/lib/udev/rules.d
-    cleanup:
-      - /share/man
-      - /share/sounds
-    sources:
-      - type: archive
-        url: https://www.alsa-project.org/files/pub/utils/alsa-utils-1.2.12.tar.bz2
-        sha256: 98bc6677d0c0074006679051822324a0ab0879aea558a8f68b511780d30cd924
-
   # intltool required for libdbusmenu
   - name: intltool
     buildsystem: autotools
@@ -171,10 +156,12 @@ modules:
       - npm ci
       - export PATH="$PWD/node_modules/.bin:$PATH" && npm run build
       - export PATH="$PWD/node_modules/.bin:$PATH" && npm run tauri build -- --no-bundle
-      - install -Dm755 src-tauri/target/release/qbz-nix /app/bin/qbz
+      - install -Dm755 src-tauri/target/release/qbz /app/bin/qbz
       - install -Dm644 packaging/flatpak/com.blitzfc.qbz.desktop /app/share/applications/com.blitzfc.qbz.desktop
       - install -Dm644 packaging/flatpak/com.blitzfc.qbz.metainfo.xml /app/share/metainfo/com.blitzfc.qbz.metainfo.xml
+      - install -Dm644 LICENSE /app/share/licenses/com.blitzfc.qbz/LICENSE
       - install -Dm644 src-tauri/icons/128x128.png /app/share/icons/hicolor/128x128/apps/com.blitzfc.qbz.png
+      - install -Dm644 src-tauri/icons/256x256.png /app/share/icons/hicolor/256x256/apps/com.blitzfc.qbz.png
       # Install tray icon for StatusNotifierItem (symbolic icon for panel)
       - install -Dm644 src-tauri/icons/tray.png /app/share/icons/hicolor/symbolic/apps/com.blitzfc.qbz-symbolic.png
       - install -Dm644 src-tauri/icons/32x32.png /app/share/icons/hicolor/32x32/apps/com.blitzfc.qbz.png
@@ -186,4 +173,3 @@ modules:
           - node_modules
           - src-tauri/target
           - .svelte-kit
-