feat: webowa wersja Video & Sound Downloader Pro (NestJS + React)

Odwzorowanie desktopowego v6.5.6: tryby MP3/MP4/PLAYLISTA/FACEBOOK,
jakość/format, napisy, log na żywo (SSE), STOP. Docker + Gitea CI/CD,
deploy na videodownloader.naurecki.pl.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -0,0 +1,47 @@
+name: deploy
+
+# Build + deploy na tym samym hoście: runner ma zamontowany docker.sock,
+# więc `docker compose` operuje na demonie serwera (naurecki.pl).
+on:
+  push:
+    branches: [main, master]
+  workflow_dispatch:
+
+concurrency:
+  group: deploy-videodownloader
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Sanity — docker dostępny
+        run: docker version && docker compose version
+
+      - name: Build obrazów
+        run: docker compose -f docker-compose.prod.yml build
+
+      - name: Start stacka
+        env:
+          PUBLIC_BASE_URL: https://videodownloader.naurecki.pl
+          TRIAL_ENABLED: ${{ vars.TRIAL_ENABLED }}
+          TRIAL_DAYS_LEFT: ${{ vars.TRIAL_DAYS_LEFT }}
+          TRIAL_EXPIRES: ${{ vars.TRIAL_EXPIRES }}
+        run: docker compose -f docker-compose.prod.yml up -d
+
+      - name: Czekaj na gotowość API
+        run: |
+          ok=0
+          for i in $(seq 1 40); do
+            if docker compose -f docker-compose.prod.yml exec -T api \
+                node -e "fetch('http://localhost:3000/api/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"; then
+              echo "API gotowe"; ok=1; break
+            fi
+            echo "czekam na API ($i)..."; sleep 2
+          done
+          [ "$ok" = "1" ] || { echo "API nie wstało"; docker compose -f docker-compose.prod.yml logs --tail=80 api; exit 1; }
+
+      - name: Sprzątanie nieużywanych obrazów
+        run: docker image prune -f