diff --git a/pets-fe/app.wxss b/pets-fe/app.wxss
index b418ae5..3fb35a8 100644
--- a/pets-fe/app.wxss
+++ b/pets-fe/app.wxss
@@ -391,7 +391,10 @@ page{scrollbar-width:none;-ms-overflow-style:none}
 
 .photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-1);margin-bottom:var(--sp-3)}
 .photo-tile{
-  aspect-ratio:1;border-radius:var(--r-sm);background:var(--primary-soft);
+  /* 微信 image 默认 320x240，不显式给宽高会撑破网格。width:100% + min-width:0
+     让它缩进 1fr 格子，aspect-ratio 保持正方形，overflow 裁掉溢出 */
+  width:100%;min-width:0;aspect-ratio:1;overflow:hidden;
+  border-radius:var(--r-sm);background:var(--primary-soft);
   display:flex;align-items:center;justify-content:center;font-size:56rpx;
 }
 
diff --git a/pets-fe/components/bottom-sheet/bottom-sheet.js b/pets-fe/components/bottom-sheet/bottom-sheet.js
index e059234..9d9c383 100644
--- a/pets-fe/components/bottom-sheet/bottom-sheet.js
+++ b/pets-fe/components/bottom-sheet/bottom-sheet.js
@@ -539,8 +539,8 @@ Component({
       api.getTasks(id).then((tasks) => this.setData({ manageTasks: tasks || [] })).catch(() => {});
     },
     onPickPostImages() {
-      const left = 9 - this.data.postImages.length;
-      if (left <= 0) return wx.showToast({ title: '最多 9 张', icon: 'none' });
+      const left = 3 - this.data.postImages.length;
+      if (left <= 0) return wx.showToast({ title: '最多 3 张', icon: 'none' });
       upload
         .chooseAndUploadImages(left)
         .then((list) => this.setData({ postImages: this.data.postImages.concat(list) }))
diff --git a/pets-fe/utils/request.js b/pets-fe/utils/request.js
index bbfe6a5..4a62872 100644
--- a/pets-fe/utils/request.js
+++ b/pets-fe/utils/request.js
@@ -106,19 +106,34 @@ function request(options, _retried) {
   });
 }
 
-// 文件上传（multipart）；token 过期同样先续期再重试一次
+// 文件上传（multipart）。三重兜底，应对「第一次报错、重试就好」的偶发：
+//   1) 上传前若还没 token（冷启动竞态），先续期拿到再传；
+//   2) token 过期（40100）→ 续期后重试；
+//   3) 网络 fail / 网关 5xx（响应非 JSON）等瞬时错误 → 自动重试一次。
+// 后端按 MD5 去重，重复上传同一张图返回同一条记录，重试是安全的。
 function uploadFile(filePath, _retried) {
   return new Promise((resolve, reject) => {
-    const token = getToken();
-    wx.uploadFile({
-      url: BASE_URL + '/api/upload',
-      filePath,
-      name: 'file',
-      timeout: 60000,
-      header: token ? { Authorization: 'Bearer ' + token } : {},
-      success(res) {
-        try {
-          const body = JSON.parse(res.data);
+    // 瞬时错误：还没重试过就延后再传一次，否则直接失败
+    const softRetry = (err) => {
+      if (_retried) return reject(err);
+      setTimeout(() => uploadFile(filePath, true).then(resolve, reject), 500);
+    };
+    const fire = () => {
+      const token = getToken();
+      wx.uploadFile({
+        url: BASE_URL + '/api/upload',
+        filePath,
+        name: 'file',
+        timeout: 60000,
+        header: token ? { Authorization: 'Bearer ' + token } : {},
+        success(res) {
+          let body;
+          try {
+            body = JSON.parse(res.data);
+          } catch (e) {
+            // 非 JSON 多为网关 5xx / 服务重启窗口，按瞬时错误重试
+            return softRetry(new Error('上传失败，请重试'));
+          }
           if (body.code === 0) return resolve(body.data);
           if (body.code === 40100 && !_retried) {
             return recoverAuth()
@@ -126,14 +141,17 @@ function uploadFile(filePath, _retried) {
               .catch(() => reject(new Error('登录已过期，请重进小程序')));
           }
           reject(new Error(body.message || '上传失败'));
-        } catch (e) {
-          reject(new Error('上传响应解析失败'));
-        }
-      },
-      fail(err) {
-        reject(new Error((err && err.errMsg) || '上传失败'));
-      },
-    });
+        },
+        fail(err) {
+          softRetry(new Error((err && err.errMsg) || '上传失败'));
+        },
+      });
+    };
+    // 冷启动竞态：点得太快、登录还没完成就上传，先把 token 拿到再传
+    if (!getToken() && !_retried) {
+      return recoverAuth().then(fire, fire);
+    }
+    fire();
   });
 }