feat: 添加相机和相册权限请求功能

- 在 AI 体态评估页面中集成相机和相册权限请求逻辑
- 更新 app.json 和 Info.plist，添加相应的权限说明
- 修改布局以支持照片上传功能，用户可上传正面、侧面和背面照片
- 更新 package.json 和 package-lock.json，添加 expo-image-picker 依赖

ios/Podfile.lock

@@ -3,6 +3,9 @@ PODS:
   - DoubleConversion (1.1.6)
   - EXConstants (17.1.7):
     - ExpoModulesCore
+  - EXImageLoader (5.1.0):
+    - ExpoModulesCore
+    - React-Core
   - Expo (53.0.20):
     - DoubleConversion
     - ExpoModulesCore
@@ -49,6 +52,8 @@ PODS:
     - SDWebImageAVIFCoder (~> 0.11.0)
     - SDWebImageSVGCoder (~> 1.7.0)
     - SDWebImageWebPCoder (~> 0.14.6)
+  - ExpoImagePicker (16.1.4):
+    - ExpoModulesCore
   - ExpoKeepAwake (14.1.4):
     - ExpoModulesCore
   - ExpoLinearGradient (14.1.5):
@@ -2100,6 +2105,7 @@ DEPENDENCIES:
   - boost (from `../node_modules/react-native/third-party-podspecs/boost.podspec`)
   - DoubleConversion (from `../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec`)
   - EXConstants (from `../node_modules/expo-constants/ios`)
+  - EXImageLoader (from `../node_modules/expo-image-loader/ios`)
   - Expo (from `../node_modules/expo`)
   - ExpoAsset (from `../node_modules/expo-asset/ios`)
   - ExpoBlur (from `../node_modules/expo-blur/ios`)
@@ -2108,6 +2114,7 @@ DEPENDENCIES:
   - ExpoHaptics (from `../node_modules/expo-haptics/ios`)
   - ExpoHead (from `../node_modules/expo-router/ios`)
   - ExpoImage (from `../node_modules/expo-image/ios`)
+  - ExpoImagePicker (from `../node_modules/expo-image-picker/ios`)
   - ExpoKeepAwake (from `../node_modules/expo-keep-awake/ios`)
   - ExpoLinearGradient (from `../node_modules/expo-linear-gradient/ios`)
   - ExpoLinking (from `../node_modules/expo-linking/ios`)
@@ -2212,6 +2219,8 @@ EXTERNAL SOURCES:
     :podspec: "../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec"
   EXConstants:
     :path: "../node_modules/expo-constants/ios"
+  EXImageLoader:
+    :path: "../node_modules/expo-image-loader/ios"
   Expo:
     :path: "../node_modules/expo"
   ExpoAsset:
@@ -2228,6 +2237,8 @@ EXTERNAL SOURCES:
     :path: "../node_modules/expo-router/ios"
   ExpoImage:
     :path: "../node_modules/expo-image/ios"
+  ExpoImagePicker:
+    :path: "../node_modules/expo-image-picker/ios"
   ExpoKeepAwake:
     :path: "../node_modules/expo-keep-awake/ios"
   ExpoLinearGradient:
@@ -2400,6 +2411,7 @@ SPEC CHECKSUMS:
   boost: 7e761d76ca2ce687f7cc98e698152abd03a18f90
   DoubleConversion: cb417026b2400c8f53ae97020b2be961b59470cb
   EXConstants: 98bcf0f22b820f9b28f9fee55ff2daededadd2f8
+  EXImageLoader: 4d3d3284141f1a45006cc4d0844061c182daf7ee
   Expo: a40d525c930dd1c8a158e082756ee071955baccb
   ExpoAsset: ef06e880126c375f580d4923fdd1cdf4ee6ee7d6
   ExpoBlur: 3c8885b9bf9eef4309041ec87adec48b5f1986a9
@@ -2408,6 +2420,7 @@ SPEC CHECKSUMS:
   ExpoHaptics: 0ff6e0d83cd891178a306e548da1450249d54500
   ExpoHead: a7b66cbaeeb51f4a85338d335a0f5467e29a2c90
   ExpoImage: e4102c93d1dbe99ff54b075452d1bc9d6ec21b7c
+  ExpoImagePicker: 0963da31800c906e01c03e25d7c849f16ebf02a2
   ExpoKeepAwake: bf0811570c8da182bfb879169437d4de298376e7
   ExpoLinearGradient: 7734c8059972fcf691fb4330bcdf3390960a152d
   ExpoLinking: d5c183998ca6ada66ff45e407e0f965b398a8902