feat(watchos): AppIcon CoachWatch — prérequis TestFlight

Asset catalog mono-taille 1024 (source resources/icon.png, comme l'app iOS),
ASSETCATALOG_COMPILER_APPICON_NAME=AppIcon. Vérifié: Assets.car + CFBundleIconName
dans l'Info.plist final. Sans icône, l'upload TestFlight est refusé.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ios/App/CoachWatch/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,14 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "watchos",
+      "size" : "1024x1024",
+      "filename" : "AppIcon-1024.png"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}