refactor(api): remove internal metadata from image upload responses

Omit entity details, original filename, MIME type, and file size from payloads
Update backend SQL queries and frontend interfaces to align with design specs

backend/src/uploads.ts

@@ -9,27 +9,15 @@ export type UploadEntityType = 'pokemon' | 'items' | 'habitats';
 
 export type EntityImageUpload = {
   id: number;
-  entityType: UploadEntityType;
-  entityId: number | null;
-  entityName: string;
   path: string;
   url: string;
-  originalFilename: string;
-  mimeType: string;
-  byteSize: number;
   uploadedAt: Date;
   uploadedBy: { id: number; displayName: string } | null;
 };
 
 type UploadRow = {
   id: number;
-  entityType: UploadEntityType;
-  entityId: number | null;
-  entityName: string;
   path: string;
-  originalFilename: string;
-  mimeType: string;
-  byteSize: number;
   uploadedAt: Date;
   uploadedBy: { id: number; displayName: string } | null;
 };
@@ -164,7 +152,10 @@ function hasValidImageSignature(mimeType: string, buffer: Buffer): boolean {
 
 function mapUploadRow(row: UploadRow): EntityImageUpload {
   return {
-    ...row,
+    id: row.id,
+    path: row.path,
+    uploadedAt: row.uploadedAt,
+    uploadedBy: row.uploadedBy,
     url: uploadImageUrl(row.path)
   };
 }
@@ -213,13 +204,7 @@ export async function saveEntityImageUpload(
       VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
       RETURNING
         id,
-        entity_type AS "entityType",
-        entity_id AS "entityId",
-        entity_name AS "entityName",
         path,
-        original_filename AS "originalFilename",
-        mime_type AS "mimeType",
-        byte_size AS "byteSize",
         created_at AS "uploadedAt",
         json_build_object('id', $8::integer, 'displayName', $9::text) AS "uploadedBy"
     `,
@@ -238,13 +223,7 @@ export async function listEntityImageUploads(entityType: UploadEntityType, entit
     `
       SELECT
         upload.id,
-        upload.entity_type AS "entityType",
-        upload.entity_id AS "entityId",
-        upload.entity_name AS "entityName",
         upload.path,
-        upload.original_filename AS "originalFilename",
-        upload.mime_type AS "mimeType",
-        upload.byte_size AS "byteSize",
         upload.created_at AS "uploadedAt",
         CASE
           WHEN u.id IS NULL THEN NULL