Fix Windows build: use cmd shell with explicit PATH

GITHUB_PATH file isn't picked up between steps on the Gitea runner.
Switch to cmd shell and prepend cargo/node to PATH in each step.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/build-app.yml

@@ -76,54 +76,51 @@ jobs:
     runs-on: windows-latest
     defaults:
       run:
-        shell: powershell
+        shell: cmd
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
       - name: Install Rust stable
         run: |
-          if (!(Get-Command rustup -ErrorAction SilentlyContinue)) {
-            Invoke-WebRequest -Uri https://win.rustup.rs/x86_64 -OutFile rustup-init.exe
-            .\rustup-init.exe -y --default-toolchain stable
-            Remove-Item rustup-init.exe
-          } else {
+          where rustup >nul 2>&1 && (
             rustup update stable
             rustup default stable
-          }
-          # Add cargo to PATH for subsequent steps
-          echo "$env:USERPROFILE\.cargo\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-
-      - name: Verify Rust
-        run: |
-          rustc --version
-          cargo --version
+          ) || (
+            curl -fSL -o rustup-init.exe https://win.rustup.rs/x86_64
+            rustup-init.exe -y --default-toolchain stable
+            del rustup-init.exe
+          )
 
       - name: Install Node.js
         run: |
-          if (!(Get-Command node -ErrorAction SilentlyContinue) -or !((node --version) -match 'v22')) {
-            # Download and install Node.js 22 LTS
-            Invoke-WebRequest -Uri "https://nodejs.org/dist/v22.14.0/node-v22.14.0-x64.msi" -OutFile node-install.msi
-            Start-Process msiexec.exe -ArgumentList '/i', 'node-install.msi', '/quiet', '/norestart' -Wait
-            Remove-Item node-install.msi
-            # Refresh PATH
-            $env:PATH = [System.Environment]::GetEnvironmentVariable("PATH", "Machine") + ";" + [System.Environment]::GetEnvironmentVariable("PATH", "User")
-          }
+          where node >nul 2>&1 && (
+            node --version
+          ) || (
+            curl -fSL -o node-install.msi "https://nodejs.org/dist/v22.14.0/node-v22.14.0-x64.msi"
+            msiexec /i node-install.msi /quiet /norestart
+            del node-install.msi
+          )
+
+      - name: Verify tools
+        run: |
+          set "PATH=%USERPROFILE%\.cargo\bin;C:\Program Files\nodejs;%PATH%"
+          rustc --version
+          cargo --version
           node --version
           npm --version
 
       - name: Install frontend dependencies
-        working-directory: ./app
-        run: npm ci
-
-      - name: Install Tauri CLI
         working-directory: ./app
         run: |
-          try { npx tauri --version } catch { npm install @tauri-apps/cli }
+          set "PATH=%USERPROFILE%\.cargo\bin;C:\Program Files\nodejs;%PATH%"
+          npm ci
 
       - name: Build Tauri app
         working-directory: ./app
-        run: npx tauri build
+        run: |
+          set "PATH=%USERPROFILE%\.cargo\bin;C:\Program Files\nodejs;%PATH%"
+          npx tauri build
 
       - name: Upload Windows artifacts
         uses: actions/upload-artifact@v4