fix: 修复 setupAxiosMock 多测试文件并发时 mock 丢失的问题

mock.module('axios', ...) 是 process-global last-write-wins，多个测试文件
各自注册时只有最后一个 handle 的闭包被保留，导致前面的测试 stub 不生效。
改为全局单例注册，所有 handle 共享一个 mock.module，路由器运行时扫描
活跃 handle 分派请求。

Co-Authored-By: glm-5-turbo <zai-org@claude-code-best.win>

tests/mocks/axios.ts

@@ -33,6 +33,7 @@
  * objects with `isAxiosError: true`, set `axiosHandle.stubs.isAxiosError` —
  * otherwise the real axios's predicate is used.
  */
+
 import { mock } from 'bun:test'
 
 // Test stubs come in many shapes — `(url: string) => Promise<...>`, etc. —
@@ -63,14 +64,27 @@ export type AxiosMockHandle = {
   stubs: AxiosMethodStubs
 }
 
+// Global registry — all handles share one mock.module registration.
+// The router scans handles in reverse order (most-recently activated first)
+// to find one with `useStubs === true`.
+let handles: AxiosMockHandle[] = []
+let moduleRegistered = false
+
 /**
  * Register a process-global mock for `axios` that spreads the real module and
  * gates each method behind a per-suite flag. Call once at the top of a test
  * file (outside `describe`). Returns a handle whose `.useStubs` and `.stubs`
  * fields the suite controls in beforeAll/afterAll.
+ *
+ * Multiple test files can call this safely — the `mock.module` is registered
+ * only once, and each handle is independent.
  */
 export function setupAxiosMock(): AxiosMockHandle {
   const handle: AxiosMockHandle = { useStubs: false, stubs: {} }
+  handles.push(handle)
+
+  if (!moduleRegistered) {
+    moduleRegistered = true
 
     mock.module('axios', () => {
       // Pull the REAL module synchronously inside the factory. Top-level
@@ -84,9 +98,15 @@ export function setupAxiosMock(): AxiosMockHandle {
       const route = (method: keyof AxiosMethodStubs): AnyFn => {
         const realFn = realDefault[method] as AnyFn | undefined
         return (...args: unknown[]) => {
-        if (handle.useStubs) {
+          // Scan from the end so the most recently activated handle wins.
-          const stub = handle.stubs[method] as AnyFn | undefined
+          for (let i = handles.length - 1; i >= 0; i--) {
+            const h = handles[i]
+            if (h.useStubs) {
+              const stub = h.stubs[method] as AnyFn | undefined
               if (stub) return stub(...args)
+              // If the handle is active but has no stub for this method,
+              // fall through to the next active handle (or real axios).
+            }
           }
           if (typeof realFn === 'function') return realFn(...args)
           throw new Error(`axios.${method} is not available on real axios`)
@@ -111,8 +131,11 @@ export function setupAxiosMock(): AxiosMockHandle {
       }
 
       routedDefault.isAxiosError = (e: unknown) => {
-      if (handle.useStubs && handle.stubs.isAxiosError) {
+        for (let i = handles.length - 1; i >= 0; i--) {
-        return handle.stubs.isAxiosError(e)
+          const h = handles[i]
+          if (h.useStubs && h.stubs.isAxiosError) {
+            return h.stubs.isAxiosError(e)
+          }
         }
         const realPredicate = realDefault.isAxiosError as
           | ((e: unknown) => boolean)
@@ -120,8 +143,11 @@ export function setupAxiosMock(): AxiosMockHandle {
         return realPredicate ? realPredicate(e) : false
       }
       routedDefault.isCancel = (e: unknown) => {
-      if (handle.useStubs && handle.stubs.isCancel) {
+        for (let i = handles.length - 1; i >= 0; i--) {
-        return handle.stubs.isCancel(e)
+          const h = handles[i]
+          if (h.useStubs && h.stubs.isCancel) {
+            return h.stubs.isCancel(e)
+          }
         }
         const realPredicate = realDefault.isCancel as
           | ((e: unknown) => boolean)
@@ -135,6 +161,7 @@ export function setupAxiosMock(): AxiosMockHandle {
         default: routedDefault,
       }
     })
+  }
 
   return handle
 }