diff --git a/internal/httpapi/ai.go b/internal/httpapi/ai.go
index ab9b17c..89b473a 100644
--- a/internal/httpapi/ai.go
+++ b/internal/httpapi/ai.go
@@ -7,6 +7,7 @@ import (
 	"errors"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -114,7 +115,7 @@ func (a *API) aiDocumentGenerate(w http.ResponseWriter, r *http.Request, p *auth
 	taskID := "aitask_" + randomToken(12)
 	started := time.Now().UTC().Round(time.Millisecond)
 	if err := st.CreateAITask(r.Context(), store.AITask{
-		TaskID: taskID, TenantCode: p.TenantCode, UserID: formatUserID(p.UserID), Feature: "smart_document",
+		TaskID: taskID, TenantCode: p.TenantCode, UserID: strconv.FormatInt(p.UserID, 10), Feature: "smart_document",
 		Status: "processing", Progress: 10, SourceType: "text", InputHash: hashText(source),
 		PromptVersion: "smart_document_v1", Model: "",
 		StartedAt: &started,
@@ -366,7 +367,7 @@ func (a *API) aiTableAnalysisCreate(w http.ResponseWriter, r *http.Request, p *a
 	recordID := "airec_tbl_" + randomToken(10)
 	started := time.Now().UTC().Round(time.Millisecond)
 	if err := st.CreateAITask(r.Context(), store.AITask{
-		TaskID: taskID, TenantCode: p.TenantCode, UserID: formatUserID(p.UserID), Feature: "smart_table",
+		TaskID: taskID, TenantCode: p.TenantCode, UserID: strconv.FormatInt(p.UserID, 10), Feature: "smart_table",
 		Status: "processing", Progress: 20, SourceType: "file", SourceRefID: fileID, InputHash: hashText(fileID + ":" + topic),
 		PromptVersion: "smart_table_v1", StartedAt: &started,
 	}, nil); err != nil {
@@ -496,7 +497,7 @@ func (a *API) aiMeetingSummaryCreate(w http.ResponseWriter, r *http.Request, p *
 	summaryID := "aisum_" + randomToken(10)
 	started := time.Now().UTC().Round(time.Millisecond)
 	if err := st.CreateAITask(r.Context(), store.AITask{
-		TaskID: taskID, TenantCode: p.TenantCode, UserID: formatUserID(p.UserID), Feature: "meeting_summary",
+		TaskID: taskID, TenantCode: p.TenantCode, UserID: strconv.FormatInt(p.UserID, 10), Feature: "meeting_summary",
 		Status: "processing", Progress: 20, SourceType: "meeting", SourceRefID: meetingID, InputHash: hashText(meetingID + strings.Join(fileIDs, ",")),
 		PromptVersion: "meeting_summary_v1", StartedAt: &started,
 	}, nil); err != nil {