fix: disable boot reconciler, fix onboarding loop, UI polish

Critical flow fixes:
- Disable boot reconciliation that auto-created ALL containers on
  unbundled installs (only FileBrowser should exist on first boot)
- Fix onboarding loop: RootRedirect no longer clears the
  neode_onboarding_complete flag on boot screen completion
- Seed phrase persists when navigating back (no regeneration)

UI fixes:
- Boot screen: removed github and save icons from animation loop
- Seed screens: viewport height scaling with 100dvh
- Seed restore: removed outer card container from word input grid
- Seed screens use distinct background (bg-intro-1.jpg)
- Install progress simplified to "Installing" button style
- Uninstall state moved to global store (persists across navigation)

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

core/archipelago/src/main.rs

@@ -104,8 +104,11 @@ async fn main() -> Result<()> {
             // Signal to health monitor that boot recovery is done
             crash_recovery::mark_recovery_complete();
 
-            // Reconcile containers against canonical specs (fixes config drift)
-            crash_recovery::run_boot_reconciliation().await;
+            // Boot reconciliation disabled — the reconciler creates ALL containers
+            // from specs, which is wrong on unbundled installs where only user-chosen
+            // apps should exist. The health monitor handles restarting existing
+            // containers. Run reconcile-containers.sh manually when needed.
+            // crash_recovery::run_boot_reconciliation().await;
         });
     }