feat: add ZIP file upload support for knowledge base (#1626)

* feat: add ZIP file upload support for knowledge base

- Add _parse_zip method to FileParser class using zipfile library
- Support extraction and processing of TXT, PDF, DOCX, MD, HTML files from ZIP
- Update FileUploadZone to accept .zip files
- Add ZIP format to supported formats in internationalization files
- Implement error handling for invalid ZIP files and unsupported content
- Follow existing async parsing patterns and error handling conventions

Co-Authored-By: Rock <rockchinq@gmail.com>

* refactor: modify ZIP processing to store each document as separate file

- Remove _parse_zip method from FileParser as ZIP handling now occurs at knowledge base level
- Add _store_zip_file method to RuntimeKnowledgeBase to extract and store each document separately
- Each document in ZIP is now stored as individual file entry in knowledge base
- Process ZIP files in memory using io.BytesIO to avoid filesystem writes
- Generate unique file names for extracted documents to prevent conflicts

Co-Authored-By: Rock <rockchinq@gmail.com>

* perf: delete temp files

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Rock <rockchinq@gmail.com>

web/src/app/home/knowledge/components/kb-docs/FileUploadZone.tsx

@@ -104,7 +104,7 @@ export default function FileUploadZone({
             id="file-upload"
             className="hidden"
             onChange={handleFileSelect}
-            accept=".pdf,.doc,.docx,.txt,.md,.html"
+            accept=".pdf,.doc,.docx,.txt,.md,.html,.zip"
             disabled={isUploading}
           />
 

web/src/i18n/locales/en-US.ts

@@ -292,7 +292,7 @@ const enUS = {
       dragAndDrop: 'Drag and drop files here or click to upload',
       uploading: 'Uploading...',
       supportedFormats:
-        'Supports PDF, Word, TXT, Markdown and other document formats',
+        'Supports PDF, Word, TXT, Markdown, HTML, ZIP and other document formats',
       uploadSuccess: 'File uploaded successfully!',
       uploadError: 'File upload failed, please try again',
       uploadingFile: 'Uploading file...',

web/src/i18n/locales/zh-Hans.ts

@@ -282,7 +282,7 @@ const zhHans = {
       noResults: '暂无文档',
       dragAndDrop: '拖拽文件到此处或点击上传',
       uploading: '上传中...',
-      supportedFormats: '支持 PDF、Word、TXT、Markdown 等文档格式',
+      supportedFormats: '支持 PDF、Word、TXT、Markdown、HTML、ZIP 等文档格式',
       uploadSuccess: '文件上传成功！',
       uploadError: '文件上传失败，请重试',
       uploadingFile: '上传文件中...',