fix: 转账进件文件上传限制改为每类5张，而非两类合计5张

frontend/src/views/module_payment/account/index.vue

@@ -542,7 +542,7 @@
         <el-form-item label="场景截图" prop="scene_image" required>
           <el-upload ref="uploadRef" :http-request="handleOnboardUpload" :file-list="onboardFiles"
             :limit="5" list-type="picture-card" accept=".jpg,.jpeg,.png,.pdf"
-            :before-upload="handleBeforeUpload" :on-remove="handleOnboardFileRemove">
+            :before-upload="handleSceneBeforeUpload" :on-remove="handleOnboardFileRemove">
             <el-icon><Plus /></el-icon>
           </el-upload>
           <div class="upload-tip">支持 jpg / png / pdf，最多 5 个文件</div>
@@ -556,7 +556,7 @@
           </template>
           <el-upload ref="qualUploadRef" :http-request="handleQualUpload" :file-list="onboardQualFiles"
             :limit="5" list-type="picture-card" accept=".jpg,.jpeg,.png,.pdf"
-            :before-upload="handleBeforeUpload" :on-remove="handleQualFileRemove">
+            :before-upload="handleQualBeforeUpload" :on-remove="handleQualFileRemove">
             <el-icon><Plus /></el-icon>
           </el-upload>
           <div class="upload-tip">按场景要求上传行业资质，最多 5 个文件<br>受其他公司委托为他人代发时，无论属于什么场景，请上传合作协议（含甲方行业、委托代发原因、代发对象身份等）</div>
@@ -942,7 +942,7 @@ const onboardRules: FormRules = {
 
 const ALLOWED_EXTENSIONS = [".jpg", ".jpeg", ".png", ".pdf"];
 
-function handleBeforeUpload(file: File) {
+function validateFileFormat(file: File) {
   const ext = "." + file.name.split(".").pop()?.toLowerCase();
   if (!ALLOWED_EXTENSIONS.includes(ext)) {
     ElMessage.error("仅支持 jpg / png / pdf 格式");
@@ -952,8 +952,22 @@ function handleBeforeUpload(file: File) {
     ElMessage.error("文件大小不能超过 5MB");
     return false;
   }
-  if (onboardImageIds.value.length + onboardQualImageIds.value.length >= 5) {
-    ElMessage.error("场景截图和资质文件合计最多 5 个文件");
+  return true;
+}
+
+function handleSceneBeforeUpload(file: File) {
+  if (!validateFileFormat(file)) return false;
+  if (onboardImageIds.value.length >= 5) {
+    ElMessage.error("场景截图最多 5 个文件");
+    return false;
+  }
+  return true;
+}
+
+function handleQualBeforeUpload(file: File) {
+  if (!validateFileFormat(file)) return false;
+  if (onboardQualImageIds.value.length >= 5) {
+    ElMessage.error("资质文件最多 5 个文件");
     return false;
   }
   return true;