fix: 知识库文档上传(尾斜杠+FormData+真文件接收); AI回复强制Markdown; 平台全功能知识库注入系统提示

frontend/src/pages/front/KnowledgePage.tsx

@@ -617,10 +617,12 @@ const UploadDocModal: React.FC<{
   const [fileSize, setFileSize] = useState(102400);
   const [uploading, setUploading] = useState(false);
   const [progress, setProgress] = useState(0);
+  const [selectedFile, setSelectedFile] = useState<File | null>(null);
 
   const handleFileSelect = (e: React.ChangeEvent<HTMLInputElement>) => {
     const file = e.target.files?.[0];
     if (file) {
+      setSelectedFile(file);
       setFilename(file.name);
       const ext = file.name.split('.').pop()?.toLowerCase() || 'txt';
       setFileType(ext);
@@ -633,7 +635,6 @@ const UploadDocModal: React.FC<{
     setUploading(true);
     setProgress(0);
 
-    // 模拟上传进度: 0 -> 90% in ~2 seconds (保留10%给成功动画)
     const interval = setInterval(() => {
       setProgress(prev => {
         if (prev >= 90) return prev;
@@ -642,9 +643,25 @@ const UploadDocModal: React.FC<{
     }, 150);
 
     try {
-      await onUpload(kbId, filename.trim(), fileType, fileSize);
+      const formData = new FormData();
+      if (selectedFile) {
+        formData.append('file', selectedFile);
+      }
+      formData.append('filename', filename.trim());
+      formData.append('file_type', fileType);
+      formData.append('file_size', String(fileSize));
+
+      const token = localStorage.getItem('aiflow_token');
+      const res = await fetch(`/app/api/knowledge/bases/${kbId}/documents`, {
+        method: 'POST',
+        headers: { 'Authorization': `Bearer ${token}` },
+        body: formData,
+      });
+      const data = await res.json();
+      if (!res.ok || data.code !== 0) {
+        throw new Error(data.message || data.detail || '上传失败');
+      }
       clearInterval(interval);
-      // 上传成功后先显示100% 800ms，让进度条动画完整可见，再关闭弹窗
       setProgress(100);
       setTimeout(() => {
         onClose();