Add app icons and CFBundleIconName for TestFlight validation

App Store Connect rejected the upload because:
- Missing 120x120px app icon (and other required sizes)
- Missing CFBundleIconName in Info.plist

Added placeholder solid-color icons at all required sizes.
These should be replaced with the actual Sea Haven logo.

mobile/ios/ProposalSystem/Images.xcassets/AppIcon.appiconset/Contents.json

@@ -1,46 +1,55 @@
 {
   "images" : [
     {
+      "filename" : "Icon-40.png",
       "idiom" : "iphone",
       "scale" : "2x",
       "size" : "20x20"
     },
     {
+      "filename" : "Icon-60.png",
       "idiom" : "iphone",
       "scale" : "3x",
       "size" : "20x20"
     },
     {
+      "filename" : "Icon-58.png",
       "idiom" : "iphone",
       "scale" : "2x",
       "size" : "29x29"
     },
     {
+      "filename" : "Icon-87.png",
       "idiom" : "iphone",
       "scale" : "3x",
       "size" : "29x29"
     },
     {
+      "filename" : "Icon-80.png",
       "idiom" : "iphone",
       "scale" : "2x",
       "size" : "40x40"
     },
     {
+      "filename" : "Icon-120.png",
       "idiom" : "iphone",
       "scale" : "3x",
       "size" : "40x40"
     },
     {
+      "filename" : "Icon-120.png",
       "idiom" : "iphone",
       "scale" : "2x",
       "size" : "60x60"
     },
     {
+      "filename" : "Icon-180.png",
       "idiom" : "iphone",
       "scale" : "3x",
       "size" : "60x60"
     },
     {
+      "filename" : "Icon-1024.png",
       "idiom" : "ios-marketing",
       "scale" : "1x",
       "size" : "1024x1024"

mobile/ios/ProposalSystem/Info.plist

@@ -84,5 +84,7 @@
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
+	<key>CFBundleIconName</key>
+	<string>AppIcon</string>
 </dict>
 </plist>