feat: replace Tauri with iced for native cross-platform GUI

- Create iced-app crate with pure Rust GUI using iced 0.13
- Implement server list, connect form, channel/user panels, messaging
- Implement ServerQuery panel for direct server queries
- Add VoiceEngine in tsaudio for decode/buffer/playback pipeline
- Update CI to build iced binary (no frontend build step needed)
- Remove Tauri dependency from workspace
- 69 tests passing across all crates

.github/workflows/ci.yml

@@ -41,12 +41,7 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get install -y \
-          libdbus-1-dev \
           pkg-config \
-          libgtk-3-dev \
-          libwebkit2gtk-4.1-dev \
-          libayatana-appindicator3-dev \
-          librsvg2-dev \
           libssl-dev \
           libasound2-dev
 
@@ -63,7 +58,7 @@ jobs:
 
     - name: Check
       working-directory: src
-      run: cargo check -p shared -p tscore -p tsaudio -p tsdb
+      run: cargo check -p shared -p tscore -p tsaudio -p tsdb -p re-teamspeak
 
     - name: Test
       working-directory: src
@@ -71,39 +66,13 @@ jobs:
 
     - name: Clippy
       working-directory: src
-      run: cargo clippy -p shared -p tscore -p tsaudio -p tsdb -- -D warnings
+      run: cargo clippy -p shared -p tscore -p tsaudio -p tsdb -p re-teamspeak -- -D warnings
       continue-on-error: true
 
-  # Build frontend
-  build-frontend:
-    name: Build Frontend
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Setup Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: '22'
-
-    - name: Install dependencies
-      working-directory: src/tauri-app/frontend
-      run: npm install
-
-    - name: Build
-      working-directory: src/tauri-app/frontend
-      run: npm run build
-
-    - name: Upload frontend artifact
-      uses: actions/upload-artifact@v4
-      with:
-        name: frontend-dist
-        path: src/tauri-app/frontend/dist/
-
   # Build desktop apps
   build-desktop:
     name: Build Desktop (${{ matrix.platform }})
-    needs: [test, build-frontend]
+    needs: test
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -135,21 +104,10 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get install -y \
-          libdbus-1-dev \
           pkg-config \
-          libgtk-3-dev \
-          libwebkit2gtk-4.1-dev \
-          libayatana-appindicator3-dev \
-          librsvg2-dev \
           libssl-dev \
           libasound2-dev
 
-    - name: Download frontend artifact
-      uses: actions/download-artifact@v4
-      with:
-        name: frontend-dist
-        path: src/tauri-app/frontend/dist/
-
     - name: Cache cargo
       uses: actions/cache@v4
       with:
@@ -163,27 +121,27 @@ jobs:
 
     - name: Build
       working-directory: src
-      run: cargo build --release
+      run: cargo build --release -p re-teamspeak
 
     - name: Package (Linux)
       if: matrix.platform == 'linux'
       run: |
         mkdir -p dist
-        cp src/target/release/re-teamspeak dist/ || true
+        cp src/target/release/re-teamspeak dist/
         tar -czf re-teamspeak-${{ matrix.artifact }}.tar.gz -C dist .
 
     - name: Package (Windows)
       if: matrix.platform == 'windows'
       run: |
         mkdir dist
-        copy src\target\release\re-teamspeak.exe dist\ || copy src\target\release\re_teamspeak.exe dist\ || echo "Binary not found"
+        copy src\target\release\re-teamspeak.exe dist\
         Compress-Archive -Path dist\* -DestinationPath re-teamspeak-${{ matrix.artifact }}.zip
 
     - name: Package (macOS)
       if: matrix.platform == 'macos'
       run: |
         mkdir -p dist
-        cp src/target/release/re-teamspeak dist/ || true
+        cp src/target/release/re-teamspeak dist/
         tar -czf re-teamspeak-${{ matrix.artifact }}.tar.gz -C dist .
 
     - name: Upload artifact