feat: Tauri v2 release workflow and frontend API migration

- Update release workflow with matrix strategy for Linux/macOS/Windows
- Upgrade @tauri-apps/api from v1 to v2 in frontend
- Change all tauri/tauri imports to tauri/core (Tauri v2)
- Sync tauri.conf.json across project root and src-tauri

.github/workflows/release.yml

@@ -66,7 +66,6 @@ jobs:
   docker-push:
     name: Docker Push
     runs-on: ubuntu-latest
-    needs: []
     steps:
       - uses: actions/checkout@v4
 
@@ -102,16 +101,27 @@ jobs:
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
-  build-tauri-linux:
-    name: Build Tauri (Linux)
-    runs-on: ubuntu-latest
+  build-tauri:
+    name: Build Tauri (${{ matrix.platform }})
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux
+            runner: ubuntu-latest
+          - platform: macos
+            runner: macos-latest
+          - platform: windows
+            runner: windows-latest
+    runs-on: ${{ matrix.runner }}
     steps:
       - uses: actions/checkout@v4
 
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
 
-      - name: Install system dependencies
+      - name: Install system dependencies (Linux)
+        if: matrix.platform == 'linux'
         run: |
           sudo apt-get update
           sudo apt-get install -y libwebkit2gtk-4.1-dev libgtk-3-dev libayatana-appindicator3-dev librsvg2-dev libssl-dev
@@ -126,72 +136,11 @@ jobs:
       - name: Install frontend deps
         run: cd client/src-ui && npm ci
 
-      - name: Build Tauri (Linux)
+      - name: Build Tauri
         uses: tauri-apps/tauri-action@v0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          projectPath: client
-          tagName: ${{ github.ref_name }}
-          releaseName: "EifelDC ${{ github.ref_name }}"
-          releaseBody: "See [CHANGELOG.md](CHANGELOG.md) for details."
-          releaseDraft: true
-
-  build-tauri-macos:
-    name: Build Tauri (macOS)
-    runs-on: macos-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install Rust stable
-        uses: dtolnay/rust-toolchain@stable
-
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20
-          cache: npm
-          cache-dependency-path: client/src-ui/package-lock.json
-
-      - name: Install frontend deps
-        run: cd client/src-ui && npm ci
-
-      - name: Build Tauri (macOS)
-        uses: tauri-apps/tauri-action@v0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          projectPath: client
-          tagName: ${{ github.ref_name }}
-          releaseName: "EifelDC ${{ github.ref_name }}"
-          releaseBody: "See [CHANGELOG.md](CHANGELOG.md) for details."
-          releaseDraft: true
-
-  build-tauri-windows:
-    name: Build Tauri (Windows)
-    runs-on: windows-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install Rust stable
-        uses: dtolnay/rust-toolchain@stable
-
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20
-          cache: npm
-          cache-dependency-path: client/src-ui/package-lock.json
-
-      - name: Install frontend deps
-        run: cd client/src-ui && npm ci
-
-      - name: Build Tauri (Windows)
-        uses: tauri-apps/tauri-action@v0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          projectPath: client
           tagName: ${{ github.ref_name }}
           releaseName: "EifelDC ${{ github.ref_name }}"
           releaseBody: "See [CHANGELOG.md](CHANGELOG.md) for details."