feat(android): circular logo, synthwave backgrounds, glass modal, server names + UX fixes

- New circular badge logo (ic_logo) on Intro + Connect screens; launcher
  icon rebuilt as dark circle + white grid.
- Reddish synthwave backdrop (bg-intro-2) behind Intro, Connect, and the
  remote/gamepad (edge-to-edge with a light scrim); controllers no longer
  paint an opaque fill over it.
- Server name: added to ServerEntry/prefs, the Connect form, the modal
  add-form, and saved-server rows; removal now matches by connection
  identity (rename- and legacy-format-safe).
- NESMenu modal restyled to glassmorphism #0A0A0A with centered, larger
  fields. Connect-form glass cards given a darker base for legibility.
- Intro title/subtitle set to #FAFAFA.
- Deleting the last server clears the active server and returns to Connect.
- D-pad auto-repeat initial delay raised to 500ms so a tap sends one key
  (fixes doubled nav sound).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Android/app/src/main/res/drawable/ic_launcher_background.xml

@@ -5,6 +5,6 @@
     android:viewportWidth="108"
     android:viewportHeight="108">
     <path
-        android:fillColor="#030202"
+        android:fillColor="#0A0A0A"
         android:pathData="M0,0h108v108H0z" />
 </vector>