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/build.yml

@@ -2,37 +2,37 @@ name: CI
 
 on:
   push:
-    branches: [main, master]
+    branches: [main]
   pull_request:
-    branches: [main, master]
-
-concurrency:
-  group: ${{ gitea.workflow }}-${{ gitea.ref }}
-  cancel-in-progress: true
+    branches: [main]
 
 jobs:
-  lint-and-test:
+  lint-and-build:
     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 \
+            libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev \
+            libssl-dev git ca-certificates
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          components: clippy, rustfmt
+      - 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 --component clippy,rustfmt
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
 
       - name: Install frontend dependencies
         run: npm ci
@@ -41,51 +41,21 @@ jobs:
         run: npm run lint
 
       - name: Rust fmt check
-        run: cd src-tauri && cargo fmt --check
+        run: |
+          . "$HOME/.cargo/env"
+          cd src-tauri && cargo fmt --check
 
       - name: Rust clippy
-        run: cd src-tauri && cargo clippy -- -D warnings
+        run: |
+          . "$HOME/.cargo/env"
+          cd src-tauri && cargo clippy -- -D warnings
 
       - name: Rust tests
-        run: cd src-tauri && cargo test
-
-      - name: Frontend tests
-        run: npm test
-
-  build:
-    needs: lint-and-test
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install Linux dependencies
         run: |
-          sudo apt-get update
-          sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev
-
-      - uses: dtolnay/rust-toolchain@stable
-
-      - uses: Swatinem/rust-cache@v2
-        with:
-          workspaces: src-tauri
-
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 22
-          cache: npm
-
-      - name: Install frontend dependencies
-        run: npm ci
+          . "$HOME/.cargo/env"
+          cd src-tauri && cargo test
 
       - name: Build Tauri app
-        run: npm run tauri build
-
-      - name: Upload artifacts
-        uses: actions/upload-artifact@v4
-        with:
-          name: tusk-linux-x64
-          path: |
-            src-tauri/target/release/bundle/deb/*.deb
-            src-tauri/target/release/bundle/rpm/*.rpm
-            src-tauri/target/release/bundle/appimage/*.AppImage
-          if-no-files-found: ignore
+        run: |
+          . "$HOME/.cargo/env"
+          npm run tauri build