refactor: 清理测试代码 eslint-disable 指令，消除文件级和重复局部禁用

tests/setup.ts

@@ -4,7 +4,6 @@
  * 组件测试使用各自的 test-utils.tsx
  */
 
-/* eslint-disable @typescript-eslint/no-empty-function */
 // Set up jsdom for ALL tests (both backend and frontend)
 import { JSDOM } from "jsdom";
 
@@ -34,8 +33,10 @@ const nodeProto = dom.window.Node.prototype;
 const elementProto = dom.window.Element.prototype;
 const htmlElementProto = dom.window.HTMLElement.prototype;
 
-const attachEventFn = () => {};
-const detachEventFn = () => {};
+const noop = () => undefined;
+
+const attachEventFn = noop;
+const detachEventFn = noop;
 
 Object.defineProperty(nodeProto, "attachEvent", { configurable: true, value: attachEventFn, writable: true });
 Object.defineProperty(nodeProto, "detachEvent", { configurable: true, value: detachEventFn, writable: true });
@@ -46,27 +47,53 @@ Object.defineProperty(htmlElementProto, "detachEvent", { configurable: true, val
 
 // Other polyfills
 globalThis.ResizeObserver = class {
-  disconnect() {}
-  observe() {}
-  unobserve() {}
+  disconnect() {
+    return undefined;
+  }
+
+  observe() {
+    return undefined;
+  }
+
+  unobserve() {
+    return undefined;
+  }
 };
 
 globalThis.MutationObserver = class {
-  disconnect() {}
-  observe() {}
+  disconnect() {
+    return undefined;
+  }
+
+  observe() {
+    return undefined;
+  }
+
   takeRecords() {
     return [];
   }
-  unobserve() {}
+
+  unobserve() {
+    return undefined;
+  }
 };
 
 globalThis.IntersectionObserver = class {
-  disconnect() {}
-  observe() {}
+  disconnect() {
+    return undefined;
+  }
+
+  observe() {
+    return undefined;
+  }
+
   takeRecords() {
     return [];
   }
-  unobserve() {}
+
+  unobserve() {
+    return undefined;
+  }
 } as unknown as typeof IntersectionObserver;
 
 globalThis.requestAnimationFrame = (cb: FrameRequestCallback) => setTimeout(cb, 16);
@@ -74,24 +101,24 @@ globalThis.cancelAnimationFrame = (id: number) => clearTimeout(id);
 
 Object.defineProperty(dom.window, "matchMedia", {
   value: (query: string) => ({
-    addEventListener: () => {},
-    addListener: () => {},
+    addEventListener: noop,
+    addListener: noop,
     dispatchEvent: () => true,
     matches: false,
     media: query,
     onchange: null,
-    removeEventListener: () => {},
-    removeListener: () => {},
+    removeEventListener: noop,
+    removeListener: noop,
   }),
   writable: true,
 });
 
-dom.window.Element.prototype.scrollTo = () => {};
-dom.window.Element.prototype.scrollIntoView = () => {};
+dom.window.Element.prototype.scrollTo = noop;
+dom.window.Element.prototype.scrollIntoView = noop;
 
 Object.defineProperty(dom.window, "customElements", {
   value: {
-    define: () => {},
+    define: noop,
     get: () => undefined,
   },
   writable: true,