feat: onboarding polish, splash screen, controller nav, dev script

Onboarding flow:
- Intro: improved layout and transitions
- DID: better card styling and responsiveness
- Path: added visual enhancements
- Backup/Identity/Verify: streamlined markup
- SplashScreen component added

UI:
- Controller navigation improvements (useControllerNav)
- Style.css refinements

Backend:
- Runtime package fix

Dev:
- dev-start.sh improvements

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

neode-ui/src/style.css

@@ -46,11 +46,12 @@
   backdrop-filter: blur(12px);
 }
 
-/* Controller / keyboard navigation - soft glow only (no box outline) */
+/* Controller / keyboard navigation - orange border (Archipelago brand) */
 *:focus-visible {
   outline: none;
-  box-shadow: 0 0 16px rgba(120, 180, 255, 0.2), 0 0 32px rgba(100, 160, 255, 0.1);
-  transition: box-shadow 0.2s ease;
+  border-color: rgba(251, 146, 60, 0.8) !important;
+  box-shadow: 0 0 0 2px rgba(251, 146, 60, 0.7), 0 0 16px rgba(251, 146, 60, 0.25);
+  transition: box-shadow 0.2s ease, border-color 0.2s ease;
 }
 
 /* Mobile touch targets — ensure tappable elements meet 44px minimum */
@@ -98,12 +99,12 @@ input[type="radio"]:active + * {
   transition: transform 0.2s ease, box-shadow 0.2s ease;
 }
 
-/* Containers get subtle grow + inner glow when focused (gamepad selection) */
+/* Containers get subtle grow + orange glow when focused (gamepad selection) */
 [data-controller-container]:focus-visible {
   transform: scale(1.02);
   box-shadow:
-    0 0 24px rgba(120, 180, 255, 0.15),
-    0 0 48px rgba(100, 160, 255, 0.08),
+    0 0 0 2px rgba(251, 146, 60, 0.7),
+    0 0 24px rgba(251, 146, 60, 0.2),
     inset 0 0 24px rgba(255, 255, 255, 0.03);
 }
 
@@ -978,8 +979,8 @@ input[type="radio"]:active + * {
   .sidebar-nav-item:focus-visible {
     transform: scale(1.02) !important;
     box-shadow:
-      0 0 24px rgba(120, 180, 255, 0.15),
-      0 0 48px rgba(100, 160, 255, 0.08),
+      0 0 0 2px rgba(251, 146, 60, 0.7),
+      0 0 24px rgba(251, 146, 60, 0.2),
       inset 0 0 24px rgba(255, 255, 255, 0.03) !important;
   }
 }
@@ -1302,7 +1303,7 @@ html:has(body.video-background-active)::before {
   background: rgba(255, 255, 255, 0.1);
 }
 .cloud-file-item:focus-visible {
-  box-shadow: 0 0 16px rgba(120, 180, 255, 0.2), 0 0 32px rgba(100, 160, 255, 0.1);
+  box-shadow: 0 0 0 2px rgba(251, 146, 60, 0.7), 0 0 16px rgba(251, 146, 60, 0.25);
 }
 
 .cloud-file-item-thumb {
@@ -1480,7 +1481,7 @@ html:has(body.video-background-active)::before {
   transform: translateY(0);
 }
 .cloud-grid-card:focus-visible {
-  box-shadow: 0 0 16px rgba(120, 180, 255, 0.2), 0 0 32px rgba(100, 160, 255, 0.1);
+  box-shadow: 0 0 0 2px rgba(251, 146, 60, 0.7), 0 0 16px rgba(251, 146, 60, 0.25);
 }
 
 .cloud-grid-card-cover {