feat: add admin stats page with token usage

src/services/api.ts

@@ -300,3 +300,37 @@ export async function deletePlayerCharacter(id: string): Promise<boolean> {
     return false;
   }
 }
+
+// ============ ADMIN STATS ============
+
+interface StoryStats {
+  id: string;
+  title: string;
+  messageCount: number;
+  tokens: number;
+  lastPlayed: string | null;
+}
+
+interface AdminStats {
+  totalStories: number;
+  totalSessions: number;
+  totalTokens: number;
+  stories: StoryStats[];
+}
+
+export async function getAdminStats(): Promise<AdminStats | null> {
+  try {
+    const response = await fetch(`${API_URL}/api/admin/stats`, {
+      credentials: "include",
+    });
+
+    if (!response.ok) {
+      return null;
+    }
+
+    return await response.json();
+  } catch (error) {
+    console.error("Failed to get admin stats:", error);
+    return null;
+  }
+}