Initial commit: EifelDC - Discord-like Matrix chat platform

Includes server (Rust/Axum API proxy with voice management),
Tauri desktop client with Svelte UI, bot-sdk, Docker infra
(Synapse, PostgreSQL, Coturn, Nginx), and CI/CD pipeline.

.github/workflows/ci.yml

@@ -0,0 +1,230 @@
+name: CI
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main]
+
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: 1
+
+jobs:
+  check-rust:
+    name: Rust Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-action/setup@v1
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libgtk-3-dev libayatana-appindicator3-dev librsvg2-dev libssl-dev libgtksourceview-3.0-dev
+
+      - name: Cache Cargo
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
+
+      - name: Cargo check (client)
+        run: cargo check -p eifeldc-client
+
+      - name: Cargo check (bot-sdk)
+        run: cargo check -p eifeldc-bot-sdk
+
+      - name: Cargo check (server)
+        run: cargo check -p eifeldc-server
+
+      - name: Cargo clippy
+        run: cargo clippy --workspace -- -D warnings
+
+  test-rust:
+    name: Rust Tests
+    runs-on: ubuntu-latest
+    needs: check-rust
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-action/setup@v1
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libgtk-3-dev libayatana-appindicator3-dev librsvg2-dev libssl-dev
+
+      - name: Cache Cargo
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
+
+      - name: Run tests
+        run: cargo test --workspace
+
+  check-frontend:
+    name: Frontend Check
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: client/src-ui
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: client/src-ui/package.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Svelte check
+        run: npm run check
+
+      - name: Build
+        run: npm run build
+
+  build-tauri-macos:
+    name: Build Tauri (macOS)
+    runs-on: macos-latest
+    needs: [check-rust, check-frontend]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-action/setup@v1
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: client/src-ui/package.json
+
+      - name: Install frontend deps
+        run: npm ci
+        working-directory: client/src-ui
+
+      - name: Build Tauri (macOS)
+        uses: tauri-apps/tauri-action@v0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          projectPath: client
+          tagName: v__VERSION__
+          releaseName: "EifelDC v__VERSION__"
+          releaseBody: "EifelDC Release"
+          releaseDraft: true
+          args: --target aarch64-apple-darwin
+
+      - name: Upload macOS .dmg
+        uses: actions/upload-artifact@v4
+        with:
+          name: EifelDC-macos-aarch64
+          path: client/src-tauri/target/release/bundle/dmg/*.dmg
+
+  build-tauri-macos-intel:
+    name: Build Tauri (macOS Intel)
+    runs-on: macos-latest
+    needs: [check-rust, check-frontend]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-action/setup@v1
+        with:
+          targets: x86_64-apple-darwin
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: client/src-ui/package.json
+
+      - name: Install frontend deps
+        run: npm ci
+        working-directory: client/src-ui
+
+      - name: Build Tauri (macOS Intel)
+        uses: tauri-apps/tauri-action@v0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          projectPath: client
+          tagName: v__VERSION__
+          releaseName: "EifelDC v__VERSION__"
+          releaseBody: "EifelDC Release"
+          releaseDraft: true
+          args: --target x86_64-apple-darwin
+
+      - name: Upload macOS Intel .dmg
+        uses: actions/upload-artifact@v4
+        with:
+          name: EifelDC-macos-x86_64
+          path: client/src-tauri/target/x86_64-apple-darwin/release/bundle/dmg/*.dmg
+
+  build-tauri-linux:
+    name: Build Tauri (Linux)
+    runs-on: ubuntu-latest
+    needs: [check-rust, check-frontend]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-action/setup@v1
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libgtk-3-dev libayatana-appindicator3-dev librsvg2-dev libssl-dev libgtksourceview-3.0-dev
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: client/src-ui/package.json
+
+      - name: Install frontend deps
+        run: npm ci
+        working-directory: client/src-ui
+
+      - name: Build Tauri (Linux)
+        uses: tauri-apps/tauri-action@v0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          projectPath: client
+          tagName: v__VERSION__
+          releaseName: "EifelDC v__VERSION__"
+          releaseBody: "EifelDC Release"
+          releaseDraft: true
+
+      - name: Upload Linux .deb
+        uses: actions/upload-artifact@v4
+        with:
+          name: EifelDC-linux-deb
+          path: client/src-tauri/target/release/bundle/deb/*.deb
+
+      - name: Upload Linux .AppImage
+        uses: actions/upload-artifact@v4
+        with:
+          name: EifelDC-linux-appimage
+          path: client/src-tauri/target/release/bundle/appimage/*.AppImage