fix(ci): add Rust to PATH on Windows runner before cargo steps

cargo.exe lives in %USERPROFILE%\.cargo\bin but act does not
automatically export it into the CI subprocess PATH. Added an explicit
step to append that directory to GITHUB_PATH, matching what the Linux
job already does for $HOME/.cargo/bin.

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

.gitea/workflows/release.yml

@@ -63,6 +63,18 @@ jobs:
           $ver = '${{ needs.prepare.outputs.version }}'
           node -e "const fs=require('fs');const d=JSON.parse(fs.readFileSync('src-tauri/tauri.conf.json','utf8'));d.version='$ver';fs.writeFileSync('src-tauri/tauri.conf.json',JSON.stringify(d,null,2),'utf8');"
 
+      - name: Add Rust to PATH
+        shell: powershell
+        run: |
+          $cargoDir = "$env:USERPROFILE\.cargo\bin"
+          if (Test-Path $cargoDir) {
+            Add-Content -Path $env:GITHUB_PATH -Value $cargoDir
+            Write-Host "Added $cargoDir to GITHUB_PATH"
+          } else {
+            Write-Error "Rust not found at $cargoDir — install rustup on this runner first"
+            exit 1
+          }
+
       - uses: Swatinem/rust-cache@v2
         with:
           workspaces: src-tauri