fix:修复文件上传报错

frontend/index.html

@@ -695,7 +695,8 @@
                     </div>
                     <div class="form-group">
                         <label for="createDescription">描述</label>
-                        <textarea id="createDescription" name="description" rows="3" placeholder="请输入问题描述..."></textarea>
+                        <textarea id="createDescription" name="description" rows="3"
+                            placeholder="请输入问题描述..."></textarea>
                     </div>
                     <div class="form-group">
                         <label for="createSolution">解决方案</label>
@@ -1173,7 +1174,7 @@
     </div>
 
     <!-- Scripts -->
-    <script src="/static/js/main.js?v=2.6"></script>
+    <script src="/static/js/main.js?v=20260130-2222"></script>
     <script src="/static/js/trial-periods.js?v=1.3"></script>
     <script src="/static/js/trial-periods-page.js?v=1.6"></script>
 </body>

frontend/js/main.js

@@ -61,6 +61,7 @@ function canDelete() {
 }
 
 document.addEventListener("DOMContentLoaded", function () {
+  console.log("CRM System Main JS v3.5 Loaded - " + new Date().toLocaleString());
   // 登录守卫
   const token = localStorage.getItem("crmToken");
   if (!token && !window.location.pathname.endsWith("login.html")) {
@@ -3248,16 +3249,52 @@ document.addEventListener("DOMContentLoaded", function () {
           continue;
         }
 
+        // Helper to convert file to base64 with retry
+        const fileToBase64 = async (f, attempt = 1) => {
+          try {
+            return await new Promise((resolve, reject) => {
+              const reader = new FileReader();
+              reader.onload = () => resolve(reader.result);
+              reader.onerror = () => reject(reader.error || new Error("FileReader error"));
+              reader.onabort = () => reject(new Error("File read aborted"));
+              reader.readAsDataURL(f);
+            });
+          } catch (err) {
+            if (attempt < 3 && err.name === "NotReadableError") {
+              console.warn(`Retrying ${f.name} read due to NotReadableError (attempt ${attempt})...`);
+              await new Promise(r => setTimeout(r, 200 * attempt));
+              return fileToBase64(f, attempt + 1);
+            }
+            throw err;
+          }
+        };
+
         try {
-          const base64 = await new Promise((resolve, reject) => {
-            const reader = new FileReader();
-            reader.onload = () => resolve(reader.result);
-            reader.onerror = (error) => reject(error);
-            reader.readAsDataURL(file);
-          });
+          console.log(`[v3.5] Processing ${file.name} (${file.size} bytes)...`);
+          const base64 = await fileToBase64(file);
           newBase64Images.push(base64);
+          console.log(`Successfully converted ${file.name}`);
         } catch (error) {
-          console.error(`Error converting file ${file.name} to base64:`, error);
+          console.error(`Primary method failed for ${file.name}:`, error);
+
+          // Fallback: arrayBuffer
+          try {
+            console.log(`Trying arrayBuffer fallback for ${file.name}...`);
+            const buffer = await file.arrayBuffer();
+            const bytes = new Uint8Array(buffer);
+            let binary = "";
+            const chunkSize = 8192;
+            for (let i = 0; i < bytes.length; i += chunkSize) {
+              const chunk = bytes.slice(i, i + chunkSize);
+              binary += String.fromCharCode.apply(null, chunk);
+            }
+            const b64 = `data:${file.type};base64,${btoa(binary)}`;
+            newBase64Images.push(b64);
+            console.log(`Fallback successful for ${file.name}`);
+          } catch (fallbackError) {
+            console.error(`Both methods failed for ${file.name}:`, fallbackError);
+            alert(`无法读取文件 "${file.name}"。\n这种情况通常是浏览器或系统文件锁定导致的。\n\n建议尝试：\n1. 刷新页面后再试\n2. 使用浏览器的“无痕模式”\n3. 确认文件没有被其他软件打开`);
+          }
         }
       }