feat: 영수증 스캔 네이티브 카메라(@capacitor/camera)

- 앱에서 촬영/갤러리 선택 프롬프트로 영수증 입력 (웹은 파일선택 폴백)
- AndroidManifest CAMERA 권한 추가

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

android/app/capacitor.build.gradle

@@ -10,6 +10,7 @@ android {
 apply from: "../capacitor-cordova-android-plugins/cordova.variables.gradle"
 dependencies {
     implementation project(':capacitor-app')
+    implementation project(':capacitor-camera')
     implementation project(':capacitor-preferences')
 
 }

android/app/src/main/AndroidManifest.xml

@@ -38,4 +38,8 @@
     <!-- Permissions -->
 
     <uses-permission android:name="android.permission.INTERNET" />
+
+    <!-- 영수증 OCR: 카메라 촬영 / 갤러리 선택 -->
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-feature android:name="android.hardware.camera" android:required="false" />
 </manifest>

android/capacitor.settings.gradle

@@ -5,5 +5,8 @@ project(':capacitor-android').projectDir = new File('../node_modules/@capacitor/
 include ':capacitor-app'
 project(':capacitor-app').projectDir = new File('../node_modules/@capacitor/app/android')
 
+include ':capacitor-camera'
+project(':capacitor-camera').projectDir = new File('../node_modules/@capacitor/camera/android')
+
 include ':capacitor-preferences'
 project(':capacitor-preferences').projectDir = new File('../node_modules/@capacitor/preferences/android')