refactor: add type definitions for API responses

src/types/common.d.ts

@@ -13,4 +13,54 @@ export interface UnityPackage {
     unitySortNumber?: number;
     worldSignature?: string;
     [key: string]: any;
+}
+
+// Base content types
+export interface BaseContent {
+    id: string;
+    name: string;
+    authorId: string;
+    authorName: string;
+    description: string;
+    imageUrl: string;
+    thumbnailImageUrl: string;
+    created_at: string;
+    updated_at: string;
+    releaseStatus: string;
+    tags: string[];
+    featured: boolean;
+    unityPackages: UnityPackage[];
+}
+
+// Base Avatar - core avatar properties
+export interface BaseAvatar extends BaseContent {
+    acknowledgements: string | null;
+    pendingUpload: boolean;
+    performance: {
+        [platform: string]: string | number;
+    };
+    searchable: boolean;
+    styles: {
+        primary: string | null;
+        secondary: string | null;
+    };
+    unityPackageUrl: string;
+    unityPackageUrlObject: {
+        unityPackageUrl: string;
+    };
+    version: number;
+}
+
+// Base World - core world properties
+export interface BaseWorld extends BaseContent {
+    capacity: number;
+    recommendedCapacity: number;
+    favorites: number;
+    heat: number;
+    popularity: number;
+    previewYoutubeId: string | null;
+    publicationDate: string;
+    labsPublicationDate: string;
+    organization: string;
+    udonProducts: any[];
 }