fix: improve ai table file handling

internal/httpapi/ai.go

@@ -379,7 +379,7 @@ func (a *API) aiTableAnalysisCreate(w http.ResponseWriter, r *http.Request, p *a
 		writeStoreError(w, r, err)
 		return
 	}
-	profile := tableProfileForAI(resolveTableFilePath(fileID, fileMeta.Location), fileType)
+	profile := a.tableProfileForAI(r, fileID, fileMeta, fileType)
 	result, err := a.ai.AnalyzeTable(r.Context(), ai.TableAnalysisInput{
 		Topic: topic, FileID: fileID, FileName: strings.TrimSpace(body.FileName), FileType: fileType, FileSize: fileSize, Profile: profile,
 	})
@@ -831,10 +831,15 @@ func aiRecordPayloads(records []store.AIRecord) []map[string]any {
 func aiTableRecordPayloads(records []store.AIRecord) []map[string]any {
 	items := make([]map[string]any, 0, len(records))
 	for _, record := range records {
+		fileType := strings.ToLower(strings.TrimSpace(record.FileType))
 		items = append(items, map[string]any{
 			"record_id":  record.RecordID,
 			"title":      record.Title,
 			"summary":    record.Summary,
+			"format":     fileType,
+			"file_type":  fileType,
+			"file_name":  record.FileName,
+			"file_size":  record.FileSize,
 			"status":     record.Status,
 			"created_at": record.CreatedAt.UTC().Format(time.RFC3339Nano),
 			"updated_at": record.UpdatedAt.UTC().Format(time.RFC3339Nano),
@@ -976,7 +981,26 @@ func resolveTableFilePath(fileID, location string) string {
 	return ""
 }
 
-func tableProfileForAI(path, fileType string) ai.TableProfile {
+func (a *API) tableProfileForAI(r *http.Request, fileID string, meta store.AIFileMetadata, fileType string) ai.TableProfile {
+	if path := resolveTableFilePath(fileID, meta.Location); path != "" {
+		return tableProfileFromPath(path, fileType)
+	}
+	if path, cleanup, err := downloadWorkbenchFileToTemp(r, fileID, fileType); err == nil {
+		defer cleanup()
+		return tableProfileFromPath(path, fileType)
+	}
+	if strings.TrimSpace(meta.Location) == "" {
+		return ai.TableProfile{Parsed: false, Message: "source file metadata is not available"}
+	}
+	path, cleanup, err := a.downloadOSSObjectToTemp(r.Context(), meta.Location, fileType)
+	if err != nil {
+		return ai.TableProfile{Parsed: false, Message: "source file is not available: " + err.Error()}
+	}
+	defer cleanup()
+	return tableProfileFromPath(path, fileType)
+}
+
+func tableProfileFromPath(path, fileType string) ai.TableProfile {
 	if strings.TrimSpace(path) == "" {
 		return ai.TableProfile{Parsed: false, Message: "source file is not available locally"}
 	}