feat: 完善知识库批量导入与公共 API

- 新增批量异步导入、状态查询、失败重试与中断恢复链路

- 拆分知识库读取、导入、维护权限并完善 Public API 契约

- 补充数据库迁移、管理端交互、接口说明与相关测试

easyflow-ui-admin/app/src/locales/langs/en-US/documentCollection.json

@@ -78,6 +78,50 @@
     "fileName": "File Name",
     "progressUpload": "Progress of file upload",
     "fileSize": "File size",
+    "batchUploadTitle": "Select files or drop them here",
+    "batchUploadDescription": "TXT, PDF, DOCX, MD, PPTX and XLSX. Up to 100MB per file and 1GB per folder.",
+    "batchUploadTip": "When upload completes, choose manual or automatic import.",
+    "selectFolder": "Select Folder",
+    "manualImport": "Manual Import",
+    "autoImport": "Auto Import",
+    "autoImportTip": "Automatically parse, chunk, vectorize and store every document.",
+    "manualImportStarted": "Documents are parsing and will be ready for manual chunking",
+    "autoImportStarted": "Automatic import started",
+    "uploadCompleteFirst": "Wait for every file to finish uploading",
+    "uploaded": "Uploaded",
+    "uploading": "Uploading",
+    "retryUpload": "Retry Upload",
+    "retry": "Retry",
+    "singleFileLimit": "Each file must be no larger than 100MB",
+    "folderSizeLimit": "The folder must be no larger than 1GB",
+    "fileCountLimit": "A batch can contain up to 2000 files",
+    "noSupportedFiles": "No supported documents found",
+    "unsupportedSkipped": "Unsupported files were skipped",
+    "createBatchFailed": "Failed to create upload batch",
+    "cancelBatchFailed": "Failed to cancel the upload batch. Please retry.",
+    "uploadFailed": "Upload failed. Please retry.",
+    "duplicatePolicy": "Duplicates",
+    "skipDuplicates": "Skip",
+    "overwriteDuplicates": "Replace",
+    "reimportDuplicates": "Reimport",
+    "batchStatus": "Automatic import status",
+    "batchRunning": "Running",
+    "batchInterrupted": "Interrupted",
+    "batchPartial": "Partially failed",
+    "batchFailed": "Import failed",
+    "batchCompleted": "Completed",
+    "completedCount": "Completed",
+    "processingCount": "Processing",
+    "failedCount": "Failed",
+    "pendingCount": "Pending",
+    "skippedCount": "Skipped",
+    "continueBatch": "Continue",
+    "splitOrIndexFailed": "Chunking or indexing failed. Please retry.",
+    "documentSourceUnavailable": "Unable to read the document file. Please contact the administrator.",
+    "parseServiceUnavailable": "The document parsing service is temporarily unavailable. Please retry later.",
+    "parseServiceTimeout": "The document parsing service timed out. Please retry later.",
+    "taskPendingTimeout": "The task waited too long in the queue. Please retry.",
+    "taskExecutionInterrupted": "The task was interrupted. Please retry.",
     "uploadCreateTip": "After upload, the document appears in the list first and is parsed asynchronously. Continue with chunking after parsing finishes.",
     "analysisTip": "The system analyzes multilingual structure first and recommends a splitting strategy. You can still adjust each file manually.",
     "manualStrategyTip": "The preview refreshes automatically when the chunking strategy changes. Start indexing after it looks right.",
@@ -134,6 +178,8 @@
     "PARSING": "Parsing",
     "PARSE_FAILED": "Parse Failed",
     "READY_FOR_SEGMENT": "Ready for Chunking",
+    "SPLITTING": "Chunking",
+    "SPLIT_FAILED": "Chunking Failed",
     "READY_FOR_INDEX": "Ready for Indexing",
     "INDEXING": "Indexing",
     "INDEX_FAILED": "Index Failed",