System bars: lock in Option 1 (brand-blue bars) on iOS + Android

User picked the brand-blue look for both platforms. Apply .sysbar-blue on any
native platform; set white icons via the safe-area plugin on Android and via
@capacitor/status-bar on iOS. capacitor.config statusBarStyle/navigationBarStyle
-> DARK (light icons) so native builds match before JS runs. iOS is live, so this
web change reaches it immediately — verify on an iPhone.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

mobile/capacitor.config.json

@@ -15,8 +15,8 @@
       "detectViewportFitCoverChanges": true,
       "initialViewportFitCover": true,
       "offsetForKeyboardInsetBug": true,
-      "statusBarStyle": "LIGHT",
-      "navigationBarStyle": "LIGHT"
+      "statusBarStyle": "DARK",
+      "navigationBarStyle": "DARK"
     },
     "SystemBars": {
       "insetsHandling": "disable"