Add camera functionality for task completion photos

- Add camera picker interface to common ImagePicker.kt
- Implement camera capture for Android using ActivityResultContracts.TakePicture
- Implement camera capture for iOS using UIImagePickerController
- Add camera picker stubs for wasmJs, jsMain, and jvmMain platforms
- Update CompleteTaskDialog to show both "Take Photo" and "Choose from Library" buttons
- Add camera permissions to Android manifest (CAMERA permission, camera intent queries)
- Configure Android FileProvider for camera photo sharing
- Add camera and photo library usage descriptions to iOS Info.plist
- Update iOS CompleteTaskView with native camera picker support
- Fix cancel button in CompleteTaskView using @Environment(\.dismiss)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

composeApp/src/androidMain/AndroidManifest.xml

@@ -2,6 +2,13 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.CAMERA" />
+
+    <queries>
+        <intent>
+            <action android:name="android.media.action.IMAGE_CAPTURE" />
+        </intent>
+    </queries>
 
     <application
         android:allowBackup="true"
@@ -32,6 +39,17 @@
                     android:host="reset-password" />
             </intent-filter>
         </activity>
+
+        <!-- FileProvider for camera photos -->
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
     </application>
 
 </manifest>

composeApp/src/androidMain/kotlin/com/example/mycrib/platform/ImagePicker.android.kt

@@ -1,11 +1,15 @@
 package com.mycrib.platform
 
+import android.content.Context
 import android.net.Uri
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.PickVisualMediaRequest
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
 import androidx.compose.ui.platform.LocalContext
+import androidx.core.content.FileProvider
+import java.io.File
 
 @Composable
 actual fun rememberImagePicker(
@@ -50,6 +54,46 @@ actual fun rememberImagePicker(
     }
 }
 
+@Composable
+actual fun rememberCameraPicker(
+    onImageCaptured: (ImageData) -> Unit
+): () -> Unit {
+    val context = LocalContext.current
+
+    // Create a temp file URI for the camera to save to
+    val photoUri = remember {
+        val photoFile = File(context.cacheDir, "camera_photo_${System.currentTimeMillis()}.jpg")
+        FileProvider.getUriForFile(
+            context,
+            "${context.packageName}.fileprovider",
+            photoFile
+        )
+    }
+
+    val launcher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.TakePicture()
+    ) { success: Boolean ->
+        if (success) {
+            try {
+                val inputStream = context.contentResolver.openInputStream(photoUri)
+                val bytes = inputStream?.readBytes()
+                inputStream?.close()
+
+                if (bytes != null) {
+                    val fileName = "camera_${System.currentTimeMillis()}.jpg"
+                    onImageCaptured(ImageData(bytes, fileName))
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
+        }
+    }
+
+    return {
+        launcher.launch(photoUri)
+    }
+}
+
 private fun getFileNameFromUri(context: android.content.Context, uri: Uri): String {
     var fileName = "image_${System.currentTimeMillis()}.jpg"
 

composeApp/src/androidMain/res/xml/file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <cache-path name="camera_images" path="/" />
+</paths>