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/commonMain/kotlin/com/example/mycrib/platform/ImagePicker.kt

@@ -29,3 +29,8 @@ data class ImageData(
 expect fun rememberImagePicker(
     onImagesPicked: (List<ImageData>) -> Unit
 ): () -> Unit
+
+@Composable
+expect fun rememberCameraPicker(
+    onImageCaptured: (ImageData) -> Unit
+): () -> Unit

composeApp/src/commonMain/kotlin/com/example/mycrib/ui/components/CompleteTaskDialog.kt

@@ -8,12 +8,14 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Close
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.unit.dp
 import com.mycrib.shared.models.TaskCompletionCreateRequest
 import com.mycrib.platform.ImageData
 import com.mycrib.platform.rememberImagePicker
+import com.mycrib.platform.rememberCameraPicker
 import kotlinx.datetime.*
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -34,6 +36,10 @@ fun CompleteTaskDialog(
         selectedImages = images
     }
 
+    val cameraPicker = rememberCameraPicker { image ->
+        selectedImages = selectedImages + image
+    }
+
     AlertDialog(
         onDismissRequest = onDismiss,
         title = { Text("Complete Task: $taskTitle") },
@@ -89,11 +95,23 @@ fun CompleteTaskDialog(
                     )
                     Spacer(modifier = Modifier.height(4.dp))
 
-                    OutlinedButton(
-                        onClick = { imagePicker() },
-                        modifier = Modifier.fillMaxWidth()
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.spacedBy(8.dp)
                     ) {
-                        Text("Select Images (up to 5)")
+                        OutlinedButton(
+                            onClick = { cameraPicker() },
+                            modifier = Modifier.weight(1f)
+                        ) {
+                            Text("Take Photo")
+                        }
+
+                        OutlinedButton(
+                            onClick = { imagePicker() },
+                            modifier = Modifier.weight(1f)
+                        ) {
+                            Text("Choose from Library")
+                        }
                     }
 
                     // Display selected images