fix: add GET /subscriptions endpoint to silence 404s

The frontend calls GET /subscriptions but only GET /subscriptions/active
existed. Add a root GET handler that returns the same data.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/subscriptions/subscriptions.controller.ts

@@ -60,6 +60,16 @@ export class SubscriptionsController {
     );
   }
 
+  /**
+   * Get all subscriptions for the current user.
+   * The frontend calls GET /subscriptions and filters client-side.
+   */
+  @Get()
+  @UseGuards(HybridAuthGuard)
+  async getSubscriptions(@User() user: RequestUser['user']) {
+    return await this.subscriptionsService.getActiveSubscriptions(user.id);
+  }
+
   /**
    * Get the current user's active subscriptions.
    */