fix(iOS相机): 移除自动低光增强配置

移除了iOS相机插件中手动启用低光增强的代码，避免和系统相机自动逻辑冲突

Assets/Plugins/iOS/CameraFocusHelper.mm

@@ -32,11 +32,6 @@ extern "C" {
                     }
                 }
 
-                // 启用低光增强（昏暗环境提高识别率）
-                if ([device respondsToSelector:@selector(setAutomaticallyEnablesLowLightBoostWhenAvailable:)]) {
-                    device.automaticallyEnablesLowLightBoostWhenAvailable = YES;
-                }
-
                 [device unlockForConfiguration];
 
                 NSLog(@"[CameraFocusHelper] 已启用连续自动对焦");

Assets/Plugins/iOS/CameraFocusHelper.mm.meta

@@ -0,0 +1,33 @@
+fileFormatVersion: 2
+guid: bfac996797a54a14fa60abaaaf887145
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
+  isOverridable: 0
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+  - first:
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+    second:
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+  - first:
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+    second:
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+      settings:
+        AddToEmbeddedBinaries: false
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: