fix: double config path, stale service worker, empty op-name log

- main.go: DOCKER_PATH=/config + /config.json (was /config/config.json)
- vite.config.ts: skipWaiting+clientsClaim forces new SW immediately;
  navigateFallback: null prevents SW from serving stale index.html;
  globPatterns excludes HTML so navigation always hits the network
- server.go: gqlOpName handles shorthand { field } syntax

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

frontend/vite.config.ts

@@ -8,6 +8,9 @@ export default defineConfig({
     vue(),
     VitePWA({
       registerType: 'autoUpdate',
+      // Inject a cache-busting version based on build time so stale service
+      // workers are replaced immediately when a new image is deployed.
+      injectRegister: 'auto',
       manifest: {
         name: 'Archivum',
         short_name: 'Archivum',
@@ -15,16 +18,26 @@ export default defineConfig({
         theme_color: '#0f172a',
         background_color: '#0f172a',
         display: 'standalone',
-        // Icons are optional; add real PNG files to public/icons/ to enable PWA install.
         icons: [],
       },
       workbox: {
-        globPatterns: ['**/*.{js,css,html,ico,png,svg,woff2}'],
+        // Force the new service worker to activate immediately
+        // instead of waiting for all tabs to close.
+        skipWaiting: true,
+        clientsClaim: true,
+        // Only cache these explicit file types — do NOT cache HTML so the
+        // SPA shell is always fetched fresh (prevents stale SW loops).
+        globPatterns: ['**/*.{js,css,woff2,png,svg,ico}'],
+        // Navigation requests (HTML) always go to the network.
+        navigateFallback: null,
         runtimeCaching: [
           {
             urlPattern: /\/graphql$/,
             handler: 'NetworkFirst',
-            options: { cacheName: 'api-cache' },
+            options: {
+              cacheName: 'api-cache',
+              networkTimeoutSeconds: 5,
+            },
           },
         ],
       },