ci: fix expressions using secrets.* in if by moving to env-based guard; add Windows-safe key injection

.github/workflows/ci-cd-web-desktop.yml

@@ -332,6 +332,8 @@ jobs:
     name: Desktop Release (Windows)
     if: ${{ startsWith(github.ref, 'refs/tags/v') }}
     runs-on: [ self-hosted, windows, desktop ]
+    env:
+      TAURI_PUBLIC_KEY: ${{ secrets.TAURI_PUBLIC_KEY }}
     defaults:
       run:
         working-directory: apps/desktop
@@ -363,11 +365,11 @@ jobs:
           projectPath: apps/desktop
 
       - name: Inject Tauri public key (post)
-        if: ${{ secrets.TAURI_PUBLIC_KEY != '' }}
-        env:
-          TAURI_PUBLIC_KEY: ${{ secrets.TAURI_PUBLIC_KEY }}
+        if: ${{ env.TAURI_PUBLIC_KEY != '' }}
+        shell: pwsh
         run: |
-          sed -i "s/REPLACE_WITH_TAURI_PUBLIC_KEY/${TAURI_PUBLIC_KEY//\//\\\/}/" apps/desktop/src-tauri/tauri.conf.json || true
+          $p = 'apps/desktop/src-tauri/tauri.conf.json'
+          (Get-Content $p) -replace 'REPLACE_WITH_TAURI_PUBLIC_KEY', $env:TAURI_PUBLIC_KEY | Set-Content $p
 
       - name: Upload latest.json + bundles to VPS
         uses: appleboy/scp-action@v0.1.7