feat: add i18n and avatar upload

apps/backend/src/modules/images/storage.service.ts

@@ -25,6 +25,20 @@ export async function saveUploadedImage(
   return { imageUrl: relative };
 }
 
+export async function saveUploadedAvatar(
+  userId: string,
+  mime: string,
+  buffer: Buffer,
+): Promise<{ imageUrl: string }> {
+  const ext = MIME_TO_EXT[mime];
+  if (!ext) throw new ValidationError('Unsupported image type');
+  const filename = `${userId}-${nanoid(8)}.${ext}`;
+  const relative = `/uploads/avatar/${filename}`;
+  const absPath = resolve(env.UPLOADS_DIR, 'avatar', filename);
+  await writeFile(absPath, buffer);
+  return { imageUrl: relative };
+}
+
 export async function deleteLocalImageIfAny(imageUrl: string | null): Promise<void> {
   if (!imageUrl) return;
   if (!imageUrl.startsWith('/uploads/')) return;

apps/backend/src/modules/profile/profile.routes.ts

@@ -1,7 +1,10 @@
 import type { FastifyInstance } from 'fastify';
 import { updateProfileSchema } from '@family-wishlist/shared';
-import { ConflictError, NotFoundError } from '../../utils/errors.js';
+import { ConflictError, NotFoundError, ValidationError } from '../../utils/errors.js';
 import { Prisma } from '@prisma/client';
+import { deleteLocalImageIfAny, saveUploadedAvatar } from '../images/storage.service.js';
+
+const MAX_AVATAR_BYTES = 2 * 1024 * 1024;
 
 export default async function profileRoutes(app: FastifyInstance) {
   app.addHook('preHandler', app.authenticate);
@@ -27,4 +30,25 @@ export default async function profileRoutes(app: FastifyInstance) {
       throw err;
     }
   });
+
+  app.post('/avatar', async (request) => {
+    const current = await app.prisma.user.findUnique({ where: { id: request.user.id } });
+    if (!current) throw new NotFoundError('Profile');
+
+    const data = await request.file();
+    if (!data) throw new ValidationError('No file uploaded');
+
+    const buffer = await data.toBuffer();
+    if (buffer.byteLength > MAX_AVATAR_BYTES) {
+      throw new ValidationError('Avatar must be 2 MB or less');
+    }
+
+    const { imageUrl } = await saveUploadedAvatar(request.user.id, data.mimetype, buffer);
+    await deleteLocalImageIfAny(current.avatarUrl);
+
+    return app.prisma.user.update({
+      where: { id: request.user.id },
+      data: { avatarUrl: imageUrl },
+    });
+  });
 }