feat: implement TS3 protocol layer, session management, and ServerQuery client

- Add real X25519 ECDH key exchange for initivexpand2 bootstrap
- Add P-256 identity key generation with TeamSpeak tomcrypt format
- Add session event loop with tokio::select! for packet/command handling
- Add ServerQuery TCP client with typed parsing (channels, clients, permissions)
- Add Tauri commands: connect (session-based), join_channel, send_message, disconnect
- Add frontend ServerQuery snapshot panel
- Fix CI: Node 22, rustup setup, npm install, workspace checks
- Add mock UDP handshake tests through initserver
- 54 tests passing across shared, tscore, tsaudio, tsdb

.github/workflows/ci.yml

@@ -32,9 +32,15 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-action/setup@v1
-      with:
-        targets: ${{ matrix.target }}
+      shell: bash
+      run: |
+        if ! command -v rustup >/dev/null 2>&1; then
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
+          export PATH="$HOME/.cargo/bin:$PATH"
+        fi
+        rustup toolchain install stable --profile minimal --target ${{ matrix.target }}
+        rustup default stable
 
     - name: Install system dependencies (Linux)
       if: runner.os == 'Linux'
@@ -63,7 +69,7 @@ jobs:
 
     - name: Check
       working-directory: src
-      run: cargo check --workspace
+      run: cargo check -p shared -p tscore -p tsaudio -p tsdb
 
     - name: Test
       working-directory: src
@@ -71,7 +77,7 @@ jobs:
 
     - name: Clippy
       working-directory: src
-      run: cargo clippy --workspace -- -D warnings
+      run: cargo clippy -p shared -p tscore -p tsaudio -p tsdb -- -D warnings
       continue-on-error: true
 
   # Build frontend
@@ -84,13 +90,11 @@ jobs:
     - name: Setup Node.js
       uses: actions/setup-node@v4
       with:
-        node-version: '20'
-        cache: 'npm'
-        cache-dependency-path: src/tauri-app/frontend/package-lock.json
+        node-version: '22'
 
     - name: Install dependencies
       working-directory: src/tauri-app/frontend
-      run: npm ci
+      run: npm install
 
     - name: Build
       working-directory: src/tauri-app/frontend
@@ -128,9 +132,15 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-action/setup@v1
-      with:
-        targets: ${{ matrix.target }}
+      shell: bash
+      run: |
+        if ! command -v rustup >/dev/null 2>&1; then
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
+          export PATH="$HOME/.cargo/bin:$PATH"
+        fi
+        rustup toolchain install stable --profile minimal --target ${{ matrix.target }}
+        rustup default stable
 
     - name: Install system dependencies (Linux)
       if: matrix.platform == 'linux'