feat: add password management, reading persistence on feed switch, and spin animation

web/src/services/api.ts

@@ -64,6 +64,13 @@ export const api = {
     return request<User>('/auth/me');
   },
 
+  async changePassword(old_password: string, new_password: string): Promise<{ message: string }> {
+    return request<{ message: string }>('/auth/password', {
+      method: 'PUT',
+      body: JSON.stringify({ old_password, new_password }),
+    });
+  },
+
   // Stats
   async getStats(): Promise<Stats> {
     return request<Stats>('/stats');