fix: production onboarding, CI tests, container security, keyboard nav

Install & Onboarding:
- Remove DEV_MODE=true from production ISO service file (auto-created
  users, skipped password setup)
- Auto-install no longer overwrites rootfs service file with bad template
- Login.vue always checks auth.isSetup — shows password creation form
  on fresh install without requiring dev build flag
- Deploy image-versions.sh to /opt/archipelago/scripts/ on installed nodes
- First-boot-containers sources image-versions.sh, runs podman as
  archipelago user (rootless), enables linger + podman.socket
- Correct volume ownership (100000:100000 for rootless UID mapping)

Container Security:
- FileBrowser: add --cap-add=DAC_OVERRIDE for rootless podman volume access
- FileBrowser: add --read-only, /data volume for database, proper cmd args
- First-boot script matches backend config (security hardening + health check)

CI Pipeline:
- Add vue-tsc type check + vitest run to build-iso.yml (runs every push)
- Add post-install-tests.yml workflow (workflow_dispatch, SSH to target)
- Build report: set +eo pipefail, fix rootfs path, add || true guards
- Bundle run-post-install-tests.sh into ISO

E2E Test Suite (scripts/run-post-install-tests.sh):
- Phase 1: Install verification (files, services, podman, linger, DEV_MODE check)
- Phase 2: Onboarding flow (auth.isSetup, auth.setup, login, DID, complete)
- Phase 3: Container lifecycle (install 3 apps via package.install RPC,
  verify running, stop, verify stopped, restart, verify running, health)
- Phase 4: Log verification (first-boot log, diagnostics, journal errors)
- Correct package.install params: {"id", "dockerImage"}

Frontend:
- Fix backdrop-filter tab-switch bug (keep animations paused during rebuild)
- Dashboard glitch animations paused during tab-hidden
- Gamepad nav: auto-focus first container on route change
- Tab roving: Left/Right on role="tab" cycles and activates sibling tabs
- ContainerApps: data-controller-launch on running app cards
- 515 tests passing (fixed 30 broken, added 19 new keyboard nav tests)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/App.vue

@@ -176,15 +176,17 @@ function onVisibilityChange() {
   if (document.hidden) {
     document.documentElement.classList.add('tab-hidden')
   } else {
-    // Step 1: kill all backdrop-filters (forces compositor to drop those layers)
+    // Step 1: strip backdrop-filter while animations stay paused (tab-hidden)
     document.documentElement.classList.add('no-backdrop')
-    document.documentElement.classList.remove('tab-hidden')
-    // Step 2: next frame, re-enable (compositor builds fresh layers)
-    requestAnimationFrame(() => {
+    // Step 2: restore backdrop-filter over static content (clean compositor rebuild)
+    // Use setTimeout — Chromium batches rAFs on tab return
+    setTimeout(() => {
+      document.documentElement.classList.remove('no-backdrop')
+      // Step 3: resume animations after backdrop-filter layers are established
       requestAnimationFrame(() => {
-        document.documentElement.classList.remove('no-backdrop')
+        document.documentElement.classList.remove('tab-hidden')
       })
-    })
+    }, 50)
   }
 }