Phase 1.14.a：替换 AppIcon 为 docs/res 内 msext 旧版图标

从 docs/res/Images.xcassets/AppIcon-1.appiconset 拷贝 9 个 png +
Contents.json 到 ylgamehall/Assets.xcassets/AppIcon.appiconset，替换
Xcode 默认空 universal 1024 模板。

- 9 个 png 覆盖 iPhone 29x29 / 40x40 / 57x57 / 60x60 三档分辨率 ×
  @1x/@2x/@3x 组合（msext 历史素材，分辨率名 "129x29" 等是文件名
  artifact，实际对应规格表里的 29x29）
- Contents.json 沿用旧版 iPhone-specific idiom，含 iOS marketing
  1024 占位（无文件名）
- BuildProject 通过，actool 3 个 warning 暂不处理（iPad 76/83.5
  缺失 → iOS 自动用 iPhone 缩放；1024 marketing 缺失 → App Store
  上架要求，企业签不强制）；Phase 10 上线前 polish 时补齐
- 顺手发现 BridgedWebView.swift:88 用 WKProcessPool 在 iOS 15+ 被弃用，
  Phase 1.14.d 实施 WebContainer 时一并清理

Plan §5 1.14.a / §8 进度已勾选

ylgamehall/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,30 +1,72 @@
 {
   "images" : [
     {
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "20x20"
     },
     {
-      "appearances" : [
-        {
-          "appearance" : "luminosity",
-          "value" : "dark"
-        }
-      ],
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "20x20"
     },
     {
-      "appearances" : [
-        {
-          "appearance" : "luminosity",
-          "value" : "tinted"
-        }
-      ],
-      "idiom" : "universal",
-      "platform" : "ios",
+      "filename" : "AppIcon-129x29.png",
+      "idiom" : "iphone",
+      "scale" : "1x",
+      "size" : "29x29"
+    },
+    {
+      "filename" : "AppIcon-129x29@2x.png",
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "filename" : "AppIcon-129x29@3x.png",
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "filename" : "AppIcon-140x40@2x.png",
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "filename" : "AppIcon-140x40@3x.png",
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "40x40"
+    },
+    {
+      "filename" : "AppIcon-157x57.png",
+      "idiom" : "iphone",
+      "scale" : "1x",
+      "size" : "57x57"
+    },
+    {
+      "filename" : "AppIcon-157x57@2x.png",
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "57x57"
+    },
+    {
+      "filename" : "AppIcon-160x60@2x.png",
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x60"
+    },
+    {
+      "filename" : "AppIcon-160x60@3x.png",
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
       "size" : "1024x1024"
     }
   ],