added fix for deployment race condition

controller/README.md

@@ -148,13 +148,14 @@ controller/
    - **Auto-generated**: DB passwords, secret keys (shown as "✓ Generated")
    - **User input**: HDD path, admin password, language, etc.
    - **"🎲 Generálás"** button next to password fields
-3. Clicks "Telepítés" → controller:
+3. Clicks "Telepítés" → `checkBeforeDeploy()` JS guard fetches live state from API first (prevents deploying if already deployed from another tab). Then controller:
    - **Memory validation**: checks `mem_request` against available system RAM (see below)
    - Validates all required fields (password fields must be explicitly filled or generated)
    - Generates auto-secrets (DB passwords, hex keys)
    - Saves `app.yaml` (env vars + locked fields list)
+   - **Updates in-memory state immediately** (so UI shows "deployed" during slow compose ops)
    - Runs `docker compose up -d` with env vars injected
-   - Updates in-memory state immediately (no stale "Telepítés" button)
+   - On failure: reverts both in-memory state and disk (app.yaml `deployed: false`)
 4. **Progress UI** replaces the form with a 3-step progress panel:
    - ✅ "Konfiguráció mentve" — shown immediately after API success
    - ⏳ "Konténer(ek) indítása..." → ✅ when containers are up