Add file uploads for photos and family icons

flutter_app/lib/services/api_client.dart

@@ -1,4 +1,5 @@
 import "dart:convert";
+import "dart:typed_data";
 import "package:http/http.dart" as http;
 import "../config/api_config.dart";
 
@@ -45,6 +46,30 @@ class ApiClient {
     return jsonDecode(response.body) as Map<String, dynamic>;
   }
 
+  Future<Map<String, dynamic>> postMultipart(
+    String path, {
+    required String fieldName,
+    required Uint8List bytes,
+    required String filename,
+    Map<String, String>? fields,
+  }) async {
+    final request = http.MultipartRequest("POST", _uri(path));
+    if (fields != null) {
+      request.fields.addAll(fields);
+    }
+    request.files.add(
+      http.MultipartFile.fromBytes(
+        fieldName,
+        bytes,
+        filename: filename,
+      ),
+    );
+    final streamed = await _client.send(request);
+    final response = await http.Response.fromStream(streamed);
+    _ensureSuccess(response);
+    return jsonDecode(response.body) as Map<String, dynamic>;
+  }
+
   Future<Map<String, dynamic>> put(
     String path,
     Map<String, dynamic> body,

flutter_app/lib/services/family_service.dart

@@ -1,3 +1,5 @@
+import "dart:typed_data";
+
 import "../config/api_config.dart";
 import "../models/family_member.dart";
 import "api_client.dart";
@@ -23,6 +25,7 @@ class FamilyService {
       final created = FamilyMember(
         id: "family-${DateTime.now().millisecondsSinceEpoch}",
         name: member.name,
+        iconUrl: member.iconUrl,
         emoji: member.emoji,
         color: member.color,
         order: member.order,
@@ -51,6 +54,22 @@ class FamilyService {
     return FamilyMember.fromJson(data);
   }
 
+  Future<String> uploadFamilyIcon({
+    required Uint8List bytes,
+    required String filename,
+  }) async {
+    if (ApiConfig.useMockData) {
+      return "mock://$filename";
+    }
+    final data = await _client.postMultipart(
+      "${ApiConfig.family}/upload-icon",
+      fieldName: "file",
+      bytes: bytes,
+      filename: filename,
+    );
+    return data["url"] as String? ?? "";
+  }
+
   Future<void> deleteFamilyMember(String id) async {
     if (ApiConfig.useMockData) {
       MockDataStore.familyMembers.removeWhere((item) => item.id == id);

flutter_app/lib/services/mock_data.dart

@@ -11,28 +11,32 @@ class MockDataStore {
     const FamilyMember(
       id: "family-1",
       name: "Dad",
-      emoji: ":)",
+      iconUrl: "",
+      emoji: "",
       color: "#0F766E",
       order: 1,
     ),
     const FamilyMember(
       id: "family-2",
       name: "Mom",
-      emoji: "<3",
+      iconUrl: "",
+      emoji: "",
       color: "#C2410C",
       order: 2,
     ),
     const FamilyMember(
       id: "family-3",
       name: "Son",
-      emoji: ":D",
+      iconUrl: "",
+      emoji: "",
       color: "#1D4ED8",
       order: 3,
     ),
     const FamilyMember(
       id: "family-4",
       name: "Daughter",
-      emoji: ":-)",
+      iconUrl: "",
+      emoji: "",
       color: "#7C3AED",
       order: 4,
     ),

flutter_app/lib/services/photo_service.dart

@@ -1,3 +1,5 @@
+import "dart:typed_data";
+
 import "../config/api_config.dart";
 import "../models/photo.dart";
 import "api_client.dart";
@@ -38,6 +40,35 @@ class PhotoService {
     return Photo.fromJson(data);
   }
 
+  Future<Photo> uploadPhotoBytes({
+    required Uint8List bytes,
+    required String filename,
+    String caption = "",
+    bool active = true,
+  }) async {
+    if (ApiConfig.useMockData) {
+      final created = Photo(
+        id: "photo-${DateTime.now().millisecondsSinceEpoch}",
+        url: "mock://$filename",
+        caption: caption,
+        active: active,
+      );
+      MockDataStore.photos.add(created);
+      return created;
+    }
+    final data = await _client.postMultipart(
+      "${ApiConfig.photos}/upload",
+      fieldName: "file",
+      bytes: bytes,
+      filename: filename,
+      fields: {
+        "caption": caption,
+        "active": active.toString(),
+      },
+    );
+    return Photo.fromJson(data);
+  }
+
   Future<void> deletePhoto(String id) async {
     if (ApiConfig.useMockData) {
       MockDataStore.photos.removeWhere((item) => item.id == id);