diff --git a/apps/h5-partner/src/components/OssUploadField.tsx b/apps/h5-partner/src/components/OssUploadField.tsx
index 16928f3..84b6990 100644
--- a/apps/h5-partner/src/components/OssUploadField.tsx
+++ b/apps/h5-partner/src/components/OssUploadField.tsx
@@ -39,6 +39,10 @@ function formatWechatUploadError(e: unknown): string {
   return msg;
 }
 
+function shouldFallbackToNativePicker(msg: string): boolean {
+  return /permission|denied|接口未就绪|signature|JSSDK|签名校验|invalid signature|config:fail|未授权/i.test(msg);
+}
+
 function acceptsImages(accept: string) {
   return accept.includes('image');
 }
@@ -139,6 +143,7 @@ export default function OssUploadField({
     setUploading(true);
     setError('');
     try {
+      weixinSdk.reset();
       await weixinSdk.init();
       await enqueueUpload(async () => {
         const files = await weixinSdk.chooseImages({
@@ -152,6 +157,14 @@ export default function OssUploadField({
         if (!files[0]) return;
         await uploadSelectedFile(files[0]);
       });
+    } catch (e) {
+      const msg = e instanceof Error ? e.message : '无法打开相册';
+      if (/cancel/i.test(msg)) return;
+      if (shouldFallbackToNativePicker(msg)) {
+        openNativeFilePicker();
+        return;
+      }
+      throw e;
     } finally {
       setUploading(false);
     }
@@ -173,6 +186,10 @@ export default function OssUploadField({
       } catch (e) {
         const msg = e instanceof Error ? e.message : '无法打开相册';
         if (/cancel/i.test(msg)) return;
+        if (shouldFallbackToNativePicker(msg)) {
+          openNativeFilePicker();
+          return;
+        }
         showUploadError(formatWechatUploadError(e));
       }
       return;
@@ -208,19 +225,17 @@ export default function OssUploadField({
           </button>
         </div>
       )}
-      {!useWechatPicker && (
-        <input
-          ref={inputRef}
-          type="file"
-          accept={resolvedAccept}
-          className="partner-oss-upload-input"
-          disabled={busy}
-          onChange={(e) => {
-            const file = e.target.files?.[0];
-            if (file) void uploadSelectedFile(file);
-          }}
-        />
-      )}
+      <input
+        ref={inputRef}
+        type="file"
+        accept={resolvedAccept}
+        className="partner-oss-upload-input"
+        disabled={busy}
+        onChange={(e) => {
+          const file = e.target.files?.[0];
+          if (file) void uploadSelectedFile(file);
+        }}
+      />
       {isImage ? (
         <button {...triggerProps} className={`partner-upload-preview${wide ? ' partner-upload-preview--wide' : ''}`}>
           <img src={value} alt={label ?? '已上传'} />
diff --git a/apps/h5-partner/src/pages/StoreCreatePage.tsx b/apps/h5-partner/src/pages/StoreCreatePage.tsx
index 0c921bd..661fa7c 100644
--- a/apps/h5-partner/src/pages/StoreCreatePage.tsx
+++ b/apps/h5-partner/src/pages/StoreCreatePage.tsx
@@ -137,6 +137,7 @@ export default function StoreCreatePage() {
   useEffect(() => {
     if (step !== 2 || !isWechatEnv()) return;
     void refresh();
+    weixinSdk.reset();
     void weixinSdk.init().catch(() => {
       /* OssUploadField 点击时会再次初始化 */
     });
diff --git a/packages/weixin-sdk/src/chooseImage.ts b/packages/weixin-sdk/src/chooseImage.ts
index 39734a5..cb8576d 100644
--- a/packages/weixin-sdk/src/chooseImage.ts
+++ b/packages/weixin-sdk/src/chooseImage.ts
@@ -1,5 +1,11 @@
 import { getRuntimePlatform, isIosDevice, isWechatDevTools } from './env';
-import { ensureJssdkReady, normalizeJssdkPageUrl } from './jssdk';
+import {
+  ensureJssdkReady,
+  getJssdkSignUrl,
+  initWechatJssdk,
+  normalizeJssdkPageUrl,
+  resetJssdkConfig,
+} from './jssdk';
 import type { WeixinSdkConfig } from './types';
 
 export type ChooseWechatImageOptions = {
@@ -108,6 +114,45 @@ function localIdToFile(localId: string): Promise<File> {
   });
 }
 
+function checkJsApi(apiName: string): Promise<boolean> {
+  return new Promise((resolve) => {
+    if (!window.wx?.checkJsApi) {
+      resolve(!!window.wx?.chooseImage);
+      return;
+    }
+    window.wx.checkJsApi({
+      jsApiList: [apiName],
+      success: (res) => resolve(!!res.checkResult?.[apiName]),
+      fail: () => resolve(false),
+    });
+  });
+}
+
+async function ensureChooseImageJssdk(config: WeixinSdkConfig): Promise<void> {
+  const jssdkOptions = {
+    apiBase: config.apiBase ?? '/api/v1',
+    clientApp: config.clientApp,
+    getAccessToken: config.getAccessToken,
+    jsApiList: ['chooseImage', 'getLocalImgData'],
+  };
+
+  await ensureJssdkReady(jssdkOptions);
+
+  let ready = await checkJsApi('chooseImage');
+  if (!ready) {
+    resetJssdkConfig();
+    await initWechatJssdk({ ...jssdkOptions, url: getJssdkSignUrl() });
+    ready = await checkJsApi('chooseImage');
+  }
+  if (!ready) {
+    throw new Error('微信选图接口未授权，请刷新页面后重试');
+  }
+}
+
+function isPermissionDeniedError(msg: string): boolean {
+  return /permission|denied|invalid signature|config:fail|signature|接口未就绪|offline verifying/i.test(msg);
+}
+
 function invokeChooseImage(
   count: number,
   sourceType: Array<'album' | 'camera'>,
@@ -144,13 +189,14 @@ export async function chooseWechatImages(
 
   if (platform === 'wechat-h5') {
     const sourceTypeKey = sourceType.join(',');
+    const jssdkOptions = {
+      apiBase: config.apiBase ?? '/api/v1',
+      clientApp: config.clientApp,
+      getAccessToken: config.getAccessToken,
+      jsApiList: ['chooseImage', 'getLocalImgData'],
+    };
     try {
-      await ensureJssdkReady({
-        apiBase: config.apiBase ?? '/api/v1',
-        clientApp: config.clientApp,
-        getAccessToken: config.getAccessToken,
-        jsApiList: ['chooseImage', 'getLocalImgData'],
-      });
+      await ensureChooseImageJssdk(config);
     } catch (e) {
       const errMsg = e instanceof Error ? e.message : 'JSSDK 初始化失败';
       void reportChooseImageEvent(config, { status: 'fail', errMsg, sourceType: sourceTypeKey, stage: 'jssdk' });
@@ -171,6 +217,10 @@ export async function chooseWechatImages(
     let lastError: Error | null = null;
     for (let attempt = 0; attempt < maxAttempts; attempt++) {
       if (attempt > 0) {
+        if (lastError && isPermissionDeniedError(lastError.message)) {
+          resetJssdkConfig();
+          await initWechatJssdk({ ...jssdkOptions, url: getJssdkSignUrl() });
+        }
         await delay(800);
       }
       try {
@@ -180,7 +230,7 @@ export async function chooseWechatImages(
       } catch (e) {
         lastError = e instanceof Error ? e : new Error('无法打开相册');
         const raw = lastError.message;
-        const retryable = /offline verifying|权限验证中|接口未就绪/i.test(raw);
+        const retryable = /offline verifying|权限验证中|接口未就绪/i.test(raw) || isPermissionDeniedError(raw);
         if (attempt < maxAttempts - 1 && retryable) continue;
         void reportChooseImageEvent(config, {
           status: 'fail',
diff --git a/packages/weixin-sdk/src/index.ts b/packages/weixin-sdk/src/index.ts
index 393730f..f414b60 100644
--- a/packages/weixin-sdk/src/index.ts
+++ b/packages/weixin-sdk/src/index.ts
@@ -7,6 +7,7 @@ export {
   normalizeJssdkPageUrl,
   getJssdkSignUrl,
   captureIosJssdkEntryUrl,
+  resetJssdkConfig,
   stripOAuthParamsFromLocation,
 } from './jssdk';
 export { formatScanFailMessage } from './scan';
@@ -42,7 +43,7 @@ export type { WeixinSdkConfig, WxApi, MiniProgramWx } from './types';
 export { DEFAULT_JS_API_LIST } from './types';
 
 import type { WeixinSdkConfig } from './types';
-import { initWechatJssdk } from './jssdk';
+import { initWechatJssdk, resetJssdkConfig } from './jssdk';
 import { getWechatLocation, getWechatLocationDetailed } from './location';
 import { scanQrCode } from './scan';
 import { invokeWechatPay } from './pay';
@@ -59,6 +60,7 @@ import {
 export function createWeixinSdk(config: WeixinSdkConfig) {
   return {
     init: () => initWechatJssdk({ ...config, apiBase: config.apiBase ?? '/api/v1' }),
+    reset: () => resetJssdkConfig(),
     login: () => wechatLogin(config),
     handleOAuthCallback: (params?: URLSearchParams) => handleWechatOAuthCallback(config, params),
     bindPhone: (payload: { wxSessionKey: string; phone: string; code: string }) =>
diff --git a/packages/weixin-sdk/src/jssdk.ts b/packages/weixin-sdk/src/jssdk.ts
index d045741..fb3893b 100644
--- a/packages/weixin-sdk/src/jssdk.ts
+++ b/packages/weixin-sdk/src/jssdk.ts
@@ -9,6 +9,20 @@ let scriptPromise: Promise<void> | null = null;
 let configured = false;
 let configuredUrl: string | null = null;
 
+function pathnameOf(url: string): string {
+  try {
+    return new URL(url).pathname;
+  } catch {
+    return url.split('?')[0];
+  }
+}
+
+/** 清除 JSSDK 配置缓存（路由切换后须重新 wx.config） */
+export function resetJssdkConfig(): void {
+  configured = false;
+  configuredUrl = null;
+}
+
 /** 参与 JSSDK 签名的页面 URL（去掉 hash、query；SPA 步骤参数不参与签名） */
 export function normalizeJssdkPageUrl(rawUrl: string): string {
   try {
@@ -19,12 +33,20 @@ export function normalizeJssdkPageUrl(rawUrl: string): string {
   }
 }
 
-/** iOS 微信内 SPA：签名 URL 须用首次进入页面的入口 URL，而非路由跳转后的当前 URL */
+/** iOS 微信内 SPA：同 pathname 内复用入口 URL；跨路由时更新入口并失效旧签名 */
 export function captureIosJssdkEntryUrl(): void {
   if (typeof window === 'undefined') return;
   if (!isIosDevice() || !isWechatBrowser() || isWechatDevTools()) return;
-  if (sessionStorage.getItem(IOS_ENTRY_URL_KEY)) return;
-  sessionStorage.setItem(IOS_ENTRY_URL_KEY, normalizeJssdkPageUrl(window.location.href));
+  const current = normalizeJssdkPageUrl(window.location.href);
+  const existing = sessionStorage.getItem(IOS_ENTRY_URL_KEY);
+  if (!existing) {
+    sessionStorage.setItem(IOS_ENTRY_URL_KEY, current);
+    return;
+  }
+  if (pathnameOf(existing) !== pathnameOf(current)) {
+    sessionStorage.setItem(IOS_ENTRY_URL_KEY, current);
+    resetJssdkConfig();
+  }
 }
 
 /** 获取参与 JSSDK 签名的 URL */
@@ -32,7 +54,9 @@ export function getJssdkSignUrl(rawUrl?: string): string {
   const current = normalizeJssdkPageUrl(rawUrl ?? (typeof window !== 'undefined' ? window.location.href : ''));
   if (typeof window !== 'undefined' && isIosDevice() && isWechatBrowser() && !isWechatDevTools()) {
     const entry = sessionStorage.getItem(IOS_ENTRY_URL_KEY);
-    if (entry) return entry;
+    if (entry && pathnameOf(entry) === pathnameOf(current)) {
+      return entry;
+    }
   }
   return current;
 }
@@ -139,6 +163,9 @@ export async function ensureJssdkReady(options: {
 }): Promise<void> {
   captureIosJssdkEntryUrl();
   const pageUrl = options.url ?? getJssdkSignUrl();
+  if (configuredUrl && pathnameOf(configuredUrl) !== pathnameOf(pageUrl)) {
+    resetJssdkConfig();
+  }
   if (!isJssdkReady()) {
     await initWechatJssdk({ ...options, url: pageUrl });
   }
diff --git a/packages/weixin-sdk/src/types.ts b/packages/weixin-sdk/src/types.ts
index 43a2902..ae3be16 100644
--- a/packages/weixin-sdk/src/types.ts
+++ b/packages/weixin-sdk/src/types.ts
@@ -19,7 +19,11 @@ export type WxApi = {
   config: (options: WechatJssdkConfig & { debug?: boolean }) => void;
   ready: (cb: () => void) => void;
   error: (cb: (res: { errMsg: string }) => void) => void;
-  checkJsApi: (options: { jsApiList: string[]; success?: (res: Record<string, boolean>) => void }) => void;
+  checkJsApi: (options: {
+    jsApiList: string[];
+    success?: (res: { checkResult?: Record<string, boolean> }) => void;
+    fail?: (res: { errMsg: string }) => void;
+  }) => void;
   getLocation: (options: {
     type?: string;
     success?: (res: WechatGpsLocation) => void;