Add Foundry mobile layout with Tauri iOS/Android support

- Add responsive mobile layout with bottom pill tab bar, swipe navigation, and task list as home screen
- Add platform detection (useIsMobile hook) with viewport breakpoint and VITE_MOBILE build flag
- Mobile-optimize settings/billing/account pages (single-column layout with horizontal tabs)
- Add iOS safe area inset handling with 47px minimum padding
- Scaffold Tauri v2 mobile targets (iOS/Android) with platform-gated sidecar and capabilities
- Add notification sound support and mobile build script

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

foundry/packages/desktop/src-tauri/gen/apple/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,116 @@
+{
+  "images": [
+    {
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "AppIcon-20x20@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "AppIcon-20x20@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "AppIcon-29x29@2x-1.png",
+      "scale": "2x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "AppIcon-29x29@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "AppIcon-40x40@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "AppIcon-40x40@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "AppIcon-60x60@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "AppIcon-60x60@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "AppIcon-20x20@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "AppIcon-20x20@2x-1.png",
+      "scale": "2x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "AppIcon-29x29@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "AppIcon-29x29@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "AppIcon-40x40@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "AppIcon-40x40@2x-1.png",
+      "scale": "2x"
+    },
+    {
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "AppIcon-76x76@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "AppIcon-76x76@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "83.5x83.5",
+      "idiom": "ipad",
+      "filename": "AppIcon-83.5x83.5@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "1024x1024",
+      "idiom": "ios-marketing",
+      "filename": "AppIcon-512@2x.png",
+      "scale": "1x"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}

foundry/packages/desktop/src-tauri/gen/apple/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}