ci: configure Gitea Actions for Docker-based runner

Use explicit ubuntu:22.04 container instead of marketplace actions
that may not work on self-hosted Gitea runners. Install Node.js and
Rust toolchain directly via curl/rustup.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -8,30 +8,38 @@ on:
 jobs:
   release:
     runs-on: ubuntu-latest
+    container:
+      image: ubuntu:22.04
+    env:
+      DEBIAN_FRONTEND: noninteractive
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Linux dependencies
+      - name: Install system dependencies
         run: |
-          sudo apt-get update
-          sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev
+          apt-get update
+          apt-get install -y \
+            build-essential curl wget pkg-config jq file \
+            libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev \
+            libssl-dev git ca-certificates
 
-      - uses: dtolnay/rust-toolchain@stable
+      - name: Install Node.js 22
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
+          apt-get install -y nodejs
 
-      - uses: Swatinem/rust-cache@v2
-        with:
-          workspaces: src-tauri
-
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 22
-          cache: npm
+      - name: Install Rust toolchain
+        run: |
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
 
       - name: Install frontend dependencies
         run: npm ci
 
       - name: Build Tauri app
-        run: npm run tauri build
+        run: |
+          . "$HOME/.cargo/env"
+          npm run tauri build
 
       - name: Create release and upload assets
         env: