feat(ui): per-app display-mode defaults (IndeeHub fullscreen) + gamepad plays media + node list scales

- Per-app default display mode: explicit user pick (remembered per app) ->
  app default -> last global -> panel; IndeeHub defaults to fullscreen.
- data-controller-primary: a media file card's gamepad-select clicks the
  card (audio -> bottom-bar player, video -> lightbox) instead of the
  card's download link.
- Discovered-nodes list scales with the viewport (max(14rem,45vh)) instead
  of cramming a long list into a fixed 224px box.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/views/appSession/appSessionConfig.ts

@@ -7,6 +7,23 @@ export type DisplayMode = 'panel' | 'overlay' | 'fullscreen'
 
 export const DISPLAY_MODE_KEY = 'archipelago_app_display_mode'
 
+/** Per-app default display mode. Used when the user hasn't explicitly picked
+ *  a mode for that app (an explicit pick is remembered per app and wins).
+ *  Apps not listed fall back to the last globally-used mode, then 'panel'. */
+export const APP_DEFAULT_DISPLAY_MODE: Record<string, DisplayMode> = {
+  'indeedhub': 'fullscreen',
+}
+
+/** Initial display mode for an app session: per-app user choice → per-app
+ *  default → last global choice → panel. */
+export function initialDisplayMode(id: string): DisplayMode {
+  const perApp = localStorage.getItem(`${DISPLAY_MODE_KEY}:${id}`) as DisplayMode | null
+  if (perApp === 'panel' || perApp === 'overlay' || perApp === 'fullscreen') return perApp
+  const appDefault = APP_DEFAULT_DISPLAY_MODE[id]
+  if (appDefault) return appDefault
+  return (localStorage.getItem(DISPLAY_MODE_KEY) as DisplayMode) || 'panel'
+}
+
 /** Container apps: manifest-generated launch ports plus overrides for companions and aliases. */
 export const APP_PORTS: Record<string, number> = {
   ...GENERATED_APP_PORTS,