优化.gitignore以支持SPM包模式

.gitignore

@@ -142,3 +142,82 @@ linux/flutter/generated_plugins.cmake
 windows/flutter/generated_plugin_registrant.cc
 windows/flutter/generated_plugin_registrant.h
 windows/flutter/generated_plugins.cmake
+
+# ================== Swift Package Manager (SPM) ==================
+# SPM build directories
+**/.build/
+**/build/
+.build/
+build/
+
+# SPM dependency resolution (controversial - some teams commit this)
+Package.resolved
+**/Package.resolved
+
+# SPM working directory files
+**/.swiftpm/
+.swiftpm/
+
+# SPM derived data and cache
+**/DerivedData/
+DerivedData/
+
+# SPM temporary files
+**/.DS_Store
+.DS_Store
+**/*.xcworkspace/xcuserdata/
+**/*.xcodeproj/xcuserdata/
+**/*.xcodeproj/project.xcworkspace/xcuserdata/
+
+# SPM Xcode integration
+**/*.xcodeproj/project.xcworkspace/
+**/*.xcworkspace/
+
+# SPM package pins (legacy)
+Package.pins
+**/Package.pins
+
+# SPM manifest backup files
+Package.swift.orig
+**/Package.swift.orig
+
+# ================== Local Plugins SPM Support ==================
+# Local plugins build artifacts
+local_plugins/**/.build/
+local_plugins/**/build/
+local_plugins/**/Package.resolved
+local_plugins/**/.swiftpm/
+local_plugins/**/DerivedData/
+
+# Specifically for the problematic paths we saw
+local_plugins/chat_api/ios/chat_api/.build/
+local_plugins/chat_api/ios/chat_api/Package.resolved
+local_plugins/ble_service/ios/ble_service/.build/
+local_plugins/ble_service/ios/ble_service/Package.resolved
+
+# ================== Additional iOS/Xcode Cleanup ==================
+# Xcode user-specific files
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+*.xcuserstate
+*.xcscmblueprint
+*.xccheckout
+
+# Xcode shared user data
+xcshareddata/
+**/xcshareddata/UserInterfaceState.xcuserstate
+
+# CocoaPods artifacts (if mixed with SPM)
+Pods/
+**/Pods/
+Podfile.lock
+**/Podfile.lock
+
+# FastLane
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots/**/*.png
+fastlane/test_output
+fastlane/readme.md