release(v1.7.30-alpha): live install/uninstall progress + cleaner pull waterfall

- Backend: unified pull-progress streaming across primary AND fallback
  registries. Earlier code only streamed for the primary attempt; if it
  failed fast (VPS 404, etc.) the UI froze at 0% until the fallback
  finished. The waterfall now uses a single shared helper that streams
  podman stderr through update_install_progress for every URL tried.
- Backend: PackageDataEntry gains uninstall_stage, set at each phase of
  handle_package_uninstall ("Stopping containers (i/total)",
  "Cleaning up volumes", "Removing app data"). State flips to Removing
  during the pipeline.
- Frontend: MarketplaceAppCard renders the live progress bar with byte
  counts during installs, matching the System Update download bar style.
- Frontend: AppCard renders the live uninstall stage label per app.
  Modal closes immediately on confirm so concurrent uninstalls each
  show their own progress on their own card.
- Cleanup: removed dead helpers (image_candidates, rewrite_for_primary,
  primary_image_url, pull_from_registries_with_skip) made unused by
  the install.rs refactor.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

neode-ui/src/views/settings/AccountInfoSection.vue

@@ -180,6 +180,18 @@ init()
               </button>
             </div>
             <div class="overflow-y-auto flex-1 min-h-0 space-y-6 pr-1">
+              <!-- v1.7.30-alpha -->
+              <div>
+                <div class="flex items-center gap-2 mb-3">
+                  <span class="text-xs font-mono px-2 py-0.5 rounded bg-orange-500/20 text-orange-300">v1.7.30-alpha</span>
+                  <span class="text-xs text-white/40">Apr 21, 2026</span>
+                </div>
+                <div class="space-y-3 text-sm text-white/80 pl-3 border-l border-white/10">
+                  <p>App installs now show a real download progress bar — same accuracy as the system update bar. You'll see "Downloading: 50.5 / 200.0 MB (25%)" with a live percentage instead of a generic spinner. The bar keeps streaming even when the install falls back from one registry to another, so you'll never see a "stuck at 0%" again.</p>
+                  <p>Uninstalls now show what's actually happening: "Stopping containers (2/5)", "Cleaning up volumes", "Removing app data" — labelled per app so you can fire off multiple uninstalls in parallel and watch each one's stage on its own card.</p>
+                  <p>OVH (146.59.87.168) is now baked in as Server 3 by default for both updates and the app registry — extra mirror, completely independent network path so a single-provider outage can't take everything down.</p>
+                </div>
+              </div>
               <!-- v1.7.29-alpha -->
               <div>
                 <div class="flex items-center gap-2 mb-3">