feat(upload): support multiple file upload on RAG Database page

frontend/src/components/DocumentUpload.tsx

@@ -1,24 +1,21 @@
 import React from 'react'
-import { Upload, Loader2, CheckCircle, AlertCircle } from 'lucide-react'
+import { Upload, Loader2 } from 'lucide-react'
 
 interface DocumentUploadProps {
-  onUpload: (file: File) => void
+  onUpload: (files: File[]) => void
   isLoading: boolean
-  success: string | null
-  error: string | null
 }
 
 export const DocumentUpload: React.FC<DocumentUploadProps> = ({
   onUpload,
   isLoading,
-  success,
-  error,
 }) => {
   const handleFileChange = (event: React.ChangeEvent<HTMLInputElement>) => {
-    const file = event.target.files?.[0]
+    const files = event.target.files
-    if (file) {
+    if (files && files.length > 0) {
-      onUpload(file)
+      onUpload(Array.from(files))
     }
+    event.target.value = ''
   }
 
   return (
@@ -26,6 +23,7 @@ export const DocumentUpload: React.FC<DocumentUploadProps> = ({
       <input
         type="file"
         accept=".pdf,.docx,.txt"
+        multiple
         onChange={handleFileChange}
         disabled={isLoading}
         className="hidden"
@@ -52,20 +50,6 @@ export const DocumentUpload: React.FC<DocumentUploadProps> = ({
           </>
         )}
       </label>
-
-      {success && (
-        <div className="flex items-center space-x-2 text-green-700">
-          <CheckCircle className="w-4 h-4" />
-          <span className="text-sm">{success}</span>
-        </div>
-      )}
-
-      {error && (
-        <div className="flex items-center space-x-2 text-red-700">
-          <AlertCircle className="w-4 h-4" />
-          <span className="text-sm">{error}</span>
-        </div>
-      )}
     </div>
   )
 }

frontend/src/pages/RAGDatabasePage.tsx

@@ -1,15 +1,20 @@
-import React, { useState } from 'react'
+import React, { useState, useCallback } from 'react'
-import { Database, AlertCircle } from 'lucide-react'
+import { Database, AlertCircle, CheckCircle, XCircle, Loader2 } from 'lucide-react'
 import { useQueryClient } from '@tanstack/react-query'
 import { useDocuments, useDocumentChunks, useDeleteDocument, useDeleteChunk, useIngestDocument } from '../lib/queries'
 import { DocumentList } from '../components/DocumentList'
 import { ChunkList } from '../components/ChunkList'
 import { DocumentUpload } from '../components/DocumentUpload'
 
+interface FileUploadEntry {
+  name: string
+  status: 'uploading' | 'success' | 'error'
+  error?: string
+}
+
 export const RAGDatabasePage: React.FC = () => {
   const [expandedId, setExpandedId] = useState<string | null>(null)
-  const [uploadSuccess, setUploadSuccess] = useState<string | null>(null)
+  const [uploadEntries, setUploadEntries] = useState<FileUploadEntry[]>([])
-  const [uploadError, setUploadError] = useState<string | null>(null)
 
   const { data: documentsData, isLoading: isLoadingDocuments, error: documentsError } = useDocuments()
   const { data: chunks, isLoading: isLoadingChunks } = useDocumentChunks(expandedId)
@@ -38,20 +43,42 @@ export const RAGDatabasePage: React.FC = () => {
     }
   }
 
-  const handleUpload = (file: File) => {
+  const handleUpload = useCallback(async (files: File[]) => {
-    setUploadSuccess(null)
+    const entries: FileUploadEntry[] = files.map((f) => ({
-    setUploadError(null)
+      name: f.name,
-    ingestDocumentMutation.mutate(file, {
+      status: 'uploading' as const,
-      onSuccess: (data) => {
+    }))
-        setUploadSuccess(`Uploaded ${data.filename}`)
+    setUploadEntries(entries)
-        queryClient.invalidateQueries({ queryKey: ['documents'] })
+
-        setTimeout(() => setUploadSuccess(null), 3000)
+    const results = await Promise.allSettled(
-      },
+      files.map(async (file) => {
-      onError: (error) => {
+        try {
-        setUploadError(error.message)
+          await ingestDocumentMutation.mutateAsync(file)
-      },
+          setUploadEntries((prev) =>
-    })
+            prev.map((e) =>
+              e.name === file.name ? { ...e, status: 'success' as const } : e
+            )
+          )
+        } catch (err: any) {
+          setUploadEntries((prev) =>
+            prev.map((e) =>
+              e.name === file.name
+                ? { ...e, status: 'error' as const, error: err?.message ?? 'Upload failed' }
+                : e
+            )
+          )
         }
+      })
+    )
+
+    queryClient.invalidateQueries({ queryKey: ['documents'] })
+    setTimeout(() => setUploadEntries([]), 5000)
+  }, [ingestDocumentMutation, queryClient])
+
+  const uploadingCount = uploadEntries.filter((e) => e.status === 'uploading').length
+  const successCount = uploadEntries.filter((e) => e.status === 'success').length
+  const errorCount = uploadEntries.filter((e) => e.status === 'error').length
+  const hasEntries = uploadEntries.length > 0
 
   if (isLoadingDocuments) {
     return (
@@ -90,10 +117,40 @@ export const RAGDatabasePage: React.FC = () => {
           <DocumentUpload
             onUpload={handleUpload}
             isLoading={ingestDocumentMutation.isPending}
-            success={uploadSuccess}
-            error={uploadError}
           />
         </div>
+
+        {hasEntries && (
+          <div className="mt-4 space-y-2">
+            <div className="text-sm font-medium text-gray-600">
+              {uploadingCount > 0
+                ? `Uploading ${successCount + errorCount + 1} of ${uploadEntries.length}…`
+                : `${successCount} succeeded${errorCount > 0 ? `, ${errorCount} failed` : ''}`}
+            </div>
+            <div className="space-y-1 max-h-40 overflow-y-auto">
+              {uploadEntries.map((entry) => (
+                <div
+                  key={entry.name}
+                  className="flex items-center space-x-2 text-sm py-1"
+                >
+                  {entry.status === 'uploading' && (
+                    <Loader2 className="w-4 h-4 text-blue-500 animate-spin shrink-0" />
+                  )}
+                  {entry.status === 'success' && (
+                    <CheckCircle className="w-4 h-4 text-green-600 shrink-0" />
+                  )}
+                  {entry.status === 'error' && (
+                    <XCircle className="w-4 h-4 text-red-600 shrink-0" />
+                  )}
+                  <span className="truncate">{entry.name}</span>
+                  {entry.status === 'error' && entry.error && (
+                    <span className="text-red-600 truncate">— {entry.error}</span>
+                  )}
+                </div>
+              ))}
+            </div>
+          </div>
+        )}
       </div>
 
       {hasDocuments && (