build(client/ios): B1 完成——PacketTunnel 链接 libbox+系统框架,iOS 构建打通

- PacketTunnel 链 Libbox.xcframework(静态,只Link不Embed)+ NetworkExtension
  + SystemConfiguration + libresolv.tbd + UIKit(libbox iOS 引用 UIApplication);
  OTHER_LDFLAGS="" 切 CocoaPods 继承,FRAMEWORK_SEARCH_PATHS 指 Frameworks/
- 桥接头手动声明 sockaddr_ctl/ctl_info(iOS SDK 无 kern_control.h,稳定内核 ABI)
- 部署目标 iOS 12→14(os.Logger 需 14;低版老机不再兼容,用户拍板)
- 修预存脚手架坑: Podfile 删悬空 RunnerTests; Info.plist 移出 Resources(双产出);
  Runner 构建阶段重排(Embed App Extensions 前置, Thin Binary 殿后) 解依赖环
- 验证: flutter build ios 通过, C1 Provider 编译通过, otool -L 扩展零外部 @rpath

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

client/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -5,6 +5,24 @@
    <BuildAction
       parallelizeBuildables = "YES"
       buildImplicitDependencies = "YES">
+      <PreActions>
+         <ExecutionAction
+            ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
+            <ActionContent
+               title = "Run Prepare Flutter Framework Script"
+               scriptText = "/bin/sh &quot;$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh&quot; prepare&#10;">
+               <EnvironmentBuildable>
+                  <BuildableReference
+                     BuildableIdentifier = "primary"
+                     BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+                     BuildableName = "Runner.app"
+                     BlueprintName = "Runner"
+                     ReferencedContainer = "container:Runner.xcodeproj">
+                  </BuildableReference>
+               </EnvironmentBuildable>
+            </ActionContent>
+         </ExecutionAction>
+      </PreActions>
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "YES"
@@ -26,6 +44,7 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
       </Testables>
@@ -34,11 +53,13 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"
       debugDocumentVersioning = "YES"
       debugServiceExtension = "internal"
+      enableGPUValidationMode = "1"
       allowLocationSimulation = "YES">
       <BuildableProductRunnable
          runnableDebuggingMode = "0">