diff --git a/src/pages/repair/EventDetail.tsx b/src/pages/repair/EventDetail.tsx
index 22ad863..ad9751e 100644
--- a/src/pages/repair/EventDetail.tsx
+++ b/src/pages/repair/EventDetail.tsx
@@ -3,8 +3,8 @@ import type { components } from "../../types/saturday"
 import { saturdayClient } from "../../utils/client"
 import { Textarea, Input, Chip, Skeleton } from "@heroui/react"
 import type { PublicMember } from "../../store/member"
-import dayjs from "dayjs"
 import { EventStatus, UserEventAction } from "../../types/event"
+import { formatDateTime } from "../../utils/date"
 
 type PublicEvent = components["schemas"]["PublicEvent"]
 type EventLog = components["schemas"]["EventLog"]
@@ -36,7 +36,7 @@ function EventLogItem(props: {
           </div>
         </div>
         <div className="flex flex-col gap-2 items-center mt-1 text-gray-600">
-          {dayjs(props.eventLog.gmtCreate).format("YYYY-MM-DD HH:mm")}
+          {formatDateTime(props.eventLog.gmtCreate)}
         </div>
       </div>
 
diff --git a/src/pages/repair/RepairAdmin.tsx b/src/pages/repair/RepairAdmin.tsx
index 4374ebe..bb82852 100644
--- a/src/pages/repair/RepairAdmin.tsx
+++ b/src/pages/repair/RepairAdmin.tsx
@@ -27,13 +27,14 @@ import { useAsyncList } from "@react-stately/data"
 import type { components } from "../../types/saturday"
 import { saturdayClient } from "../../utils/client"
 import EventDetail, { EventStatusChip, type EventDetailRef } from "./EventDetail"
-import dayjs from "dayjs"
 import { EventStatus, UserEventStatus, type RepairEvent } from "../../types/event"
 import { makeLogtoClient } from "../../utils/auth"
 import type { PublicMember } from "../../store/member"
 import type { UserInfoResponse } from "@logto/browser"
 import { getAvailableEventActions, type EventAction, type IdentityContext } from "./EventAction"
 import { ExportExcelModal } from "./ExportEventDialog"
+import { requireRepairRole } from "../../utils/repair"
+import { formatDateTime } from "../../utils/date"
 
 type PublicEvent = components["schemas"]["PublicEvent"]
 
@@ -181,11 +182,6 @@ function TicketDetailDrawer(props: {
   )
 }
 
-export const validateRepairRole = (roles: string[]) => {
-  const acceptableRoles = ["repair admin", "repair member"]
-  return roles.some(role => acceptableRoles.includes(role.toLowerCase()))
-}
-
 export default function App() {
   const [isLoading, setIsLoading] = useState(true)
   const [page, setPage] = useState(1)
@@ -201,20 +197,15 @@ export default function App() {
   useEffect(() => {
     const check = async () => {
       const adminPath = "/repair/admin"
-      const authenticated = await makeLogtoClient().isAuthenticated()
-      if (!authenticated) {
-        window.location.href = `/repair/login-hint?redirectUrl=${adminPath}`
+      const userInfo = await requireRepairRole(adminPath)
+
+      if (!userInfo) {
         return
       }
-      const res = await makeLogtoClient().getIdTokenClaims()
+
+      setUserInfo(userInfo)
       const token = await makeLogtoClient().getAccessToken()
       setToken(token)
-      const hasRole = validateRepairRole(res.roles)
-      if (!hasRole) {
-        window.location.href = `/repair/login-hint?redirectUrl=${adminPath}`
-        return
-      }
-      setUserInfo(res)
 
       const { data } = await saturdayClient.GET("/member", {
         params: {
@@ -353,7 +344,7 @@ export default function App() {
       <div className="h-18">
         <div className="flex items-center gap-2 text-sm text-gray-600">
           <div className="">
-            { dayjs(event.gmtCreate).format("YYYY-MM-DD HH:mm") }
+            { formatDateTime(event.gmtCreate) }
           </div>
 
           {event.model && (
@@ -414,7 +405,7 @@ export default function App() {
       case "gmtCreate":
         return (
           <span>
-            {dayjs(cellValue).format("YYYY-MM-DD HH:mm")}
+            {formatDateTime(cellValue)}
           </span>
         )
       case "status":
diff --git a/src/pages/repair/RepairHistoryCard.tsx b/src/pages/repair/RepairHistoryCard.tsx
index c6b3dbb..9b10d6c 100644
--- a/src/pages/repair/RepairHistoryCard.tsx
+++ b/src/pages/repair/RepairHistoryCard.tsx
@@ -1,7 +1,7 @@
 import { Card, CardBody, Chip } from "@heroui/react"
 import { EventStatusChip } from "./EventDetail"
-import dayjs from "dayjs"
 import type { components } from "../../types/saturday"
+import { formatDate, formatDateTime, formatShortDateTime } from "../../utils/date"
 
 type PublicEvent = components["schemas"]["PublicEvent"]
 
@@ -29,7 +29,7 @@ export default function RepairHistoryCard({ event, onViewDetail }: RepairHistory
             {event.size && <Chip size="sm">{event.size}</Chip>}
           </div>
           <span className="text-xs text-gray-400">
-            {dayjs(event.gmtCreate).format("YYYY-MM-DD")}
+            {formatDate(event.gmtCreate)}
           </span>
         </div>
 
@@ -41,10 +41,10 @@ export default function RepairHistoryCard({ event, onViewDetail }: RepairHistory
         </div>
 
         <div className="text-xs text-gray-400">
-          创建于 {dayjs(event.gmtCreate).format("YYYY-MM-DD HH:mm")}
+          创建于 {formatDateTime(event.gmtCreate)}
           {event.gmtModified !== event.gmtCreate && (
             <span className="ml-2">
-              更新于 {dayjs(event.gmtModified).format("MM-DD HH:mm")}
+              更新于 {formatShortDateTime(event.gmtModified)}
             </span>
           )}
         </div>
diff --git a/src/pages/repair/RepairHistoryPage.tsx b/src/pages/repair/RepairHistoryPage.tsx
index 1ccd066..4fac986 100644
--- a/src/pages/repair/RepairHistoryPage.tsx
+++ b/src/pages/repair/RepairHistoryPage.tsx
@@ -3,6 +3,7 @@ import { Button, Spinner } from "@heroui/react"
 import { makeLogtoClient } from "../../utils/auth"
 import UserRepairHistory from "./UserRepairHistory"
 import type { UserInfoResponse } from "@logto/browser"
+import { checkAuthAndRedirect } from "../../utils/repair"
 
 export default function RepairHistoryPage() {
   const [userInfo, setUserInfo] = useState<UserInfoResponse | null>(null)
@@ -14,22 +15,10 @@ export default function RepairHistoryPage() {
 
   const checkAuthStatus = async () => {
     try {
-      const logtoClient = makeLogtoClient()
-      const authenticated = await logtoClient.isAuthenticated()
-
-      if (authenticated) {
-        const claims = await logtoClient.getIdTokenClaims()
+      const claims = await checkAuthAndRedirect("/repair/history")
+      if (claims) {
         setUserInfo(claims)
       }
-      else {
-        // Redirect to login if not authenticated
-        window.location.href = "/repair/login-hint?redirectUrl=/repair/history"
-      }
-    }
-    catch (error) {
-      console.error("Error checking auth status:", error)
-      // Redirect to login on error
-      window.location.href = "/repair/login-hint?redirectUrl=/repair/history"
     }
     finally {
       setLoading(false)
diff --git a/src/pages/repair/TicketDetail.tsx b/src/pages/repair/TicketDetail.tsx
index 2d38a71..870f332 100644
--- a/src/pages/repair/TicketDetail.tsx
+++ b/src/pages/repair/TicketDetail.tsx
@@ -6,6 +6,7 @@ import EventDetail from "./EventDetail"
 import EditRepairModal from "./EditRepairModal"
 import type { UserInfoResponse } from "@logto/browser"
 import type { components } from "../../types/saturday"
+import { checkAuthAndRedirect } from "../../utils/repair"
 
 type PublicEvent = components["schemas"]["PublicEvent"]
 
@@ -32,24 +33,11 @@ export default function TicketDetail() {
 
   const checkAuthStatus = async () => {
     try {
-      const logtoClient = makeLogtoClient()
-      const authenticated = await logtoClient.isAuthenticated()
-
-      if (authenticated) {
-        const claims = await logtoClient.getIdTokenClaims()
+      const redirectUrl = `/repair/ticket-detail${window.location.search}`
+      const claims = await checkAuthAndRedirect(redirectUrl)
+      if (claims) {
         setUserInfo(claims)
       }
-      else {
-        // Redirect to login if not authenticated
-        const redirectUrl = `/repair/ticket-detail${window.location.search}`
-        window.location.href = `/repair/login-hint?redirectUrl=${encodeURIComponent(redirectUrl)}`
-      }
-    }
-    catch (error) {
-      console.error("Error checking auth status:", error)
-      // Redirect to login on error
-      const redirectUrl = `/repair/ticket-detail${window.location.search}`
-      window.location.href = `/repair/login-hint?redirectUrl=${encodeURIComponent(redirectUrl)}`
     }
     finally {
       setLoading(false)
diff --git a/src/pages/repair/TicketForm.tsx b/src/pages/repair/TicketForm.tsx
index 5b03089..5dad13a 100644
--- a/src/pages/repair/TicketForm.tsx
+++ b/src/pages/repair/TicketForm.tsx
@@ -3,7 +3,7 @@ import { makeLogtoClient } from "../../utils/auth"
 import type { UserInfoResponse } from "@logto/browser"
 import { Alert, Form, Input, Button, Textarea } from "@heroui/react"
 import { saturdayClient } from "../../utils/client"
-import { safe } from "../../utils/safe"
+import { checkAuthAndRedirect } from "../../utils/repair"
 
 type TicketFormData = {
   model?: string
@@ -275,17 +275,9 @@ export default function App() {
   useEffect(() => {
     const check = async () => {
       const createRepairPath = "/repair/create-ticket"
-      try {
-        const [res, err] = await safe(makeLogtoClient().getIdTokenClaims())
-        if (err) {
-          window.location.href = `/repair/login-hint?redirectUrl=${createRepairPath}`
-          return
-        }
-        setUserInfo(res)
-      }
-      catch (error) {
-        console.error("Error checking authentication:", error)
-        window.location.href = `/repair/login-hint?redirectUrl=${createRepairPath}`
+      const claims = await checkAuthAndRedirect(createRepairPath)
+      if (claims) {
+        setUserInfo(claims)
       }
     }
     check()
diff --git a/src/utils/date.ts b/src/utils/date.ts
new file mode 100644
index 0000000..2a9a9bc
--- /dev/null
+++ b/src/utils/date.ts
@@ -0,0 +1,34 @@
+import dayjs from "dayjs"
+
+/**
+ * Common date format patterns used across the application
+ */
+export const DateFormats = {
+  /** Format: YYYY-MM-DD HH:mm (e.g., 2024-01-15 13:45) */
+  DATETIME: "YYYY-MM-DD HH:mm",
+  /** Format: YYYY-MM-DD (e.g., 2024-01-15) */
+  DATE: "YYYY-MM-DD",
+  /** Format: MM-DD HH:mm (e.g., 01-15 13:45) */
+  SHORT_DATETIME: "MM-DD HH:mm",
+} as const
+
+/**
+ * Formats a date string or Date object to datetime format (YYYY-MM-DD HH:mm)
+ */
+export const formatDateTime = (date: string | Date): string => {
+  return dayjs(date).format(DateFormats.DATETIME)
+}
+
+/**
+ * Formats a date string or Date object to date format (YYYY-MM-DD)
+ */
+export const formatDate = (date: string | Date): string => {
+  return dayjs(date).format(DateFormats.DATE)
+}
+
+/**
+ * Formats a date string or Date object to short datetime format (MM-DD HH:mm)
+ */
+export const formatShortDateTime = (date: string | Date): string => {
+  return dayjs(date).format(DateFormats.SHORT_DATETIME)
+}
diff --git a/src/utils/repair.ts b/src/utils/repair.ts
new file mode 100644
index 0000000..c1da3a2
--- /dev/null
+++ b/src/utils/repair.ts
@@ -0,0 +1,62 @@
+import { makeLogtoClient } from "./auth"
+import type { UserInfoResponse } from "@logto/browser"
+
+/**
+ * Validates if the user has repair admin or member role
+ */
+export const validateRepairRole = (roles: string[]): boolean => {
+  const acceptableRoles = ["repair admin", "repair member"]
+  return roles.some(role => acceptableRoles.includes(role.toLowerCase()))
+}
+
+/**
+ * Checks if user is authenticated and redirects to login-hint if not
+ * @param redirectUrl - The URL to redirect back to after login
+ * @returns UserInfoResponse if authenticated, undefined if redirected
+ * @throws Never throws - all errors are handled internally with redirect
+ */
+export const checkAuthAndRedirect = async (
+  redirectUrl: string,
+): Promise<UserInfoResponse | undefined> => {
+  try {
+    const logtoClient = makeLogtoClient()
+    const authenticated = await logtoClient.isAuthenticated()
+
+    if (!authenticated) {
+      window.location.href = `/repair/login-hint?redirectUrl=${encodeURIComponent(redirectUrl)}`
+      return undefined
+    }
+
+    const claims = await logtoClient.getIdTokenClaims()
+    return claims
+  }
+  catch (error) {
+    console.error("Error checking auth status:", error)
+    window.location.href = `/repair/login-hint?redirectUrl=${encodeURIComponent(redirectUrl)}`
+    return undefined
+  }
+}
+
+/**
+ * Checks if user is authenticated and has required repair role, redirects if not
+ * @param redirectUrl - The URL to redirect back to after login
+ * @returns UserInfoResponse if authenticated and has role, undefined if redirected
+ * @throws Never throws - all errors are handled internally with redirect
+ */
+export const requireRepairRole = async (
+  redirectUrl: string,
+): Promise<UserInfoResponse | undefined> => {
+  const userInfo = await checkAuthAndRedirect(redirectUrl)
+
+  if (!userInfo) {
+    return undefined
+  }
+
+  const hasRole = validateRepairRole(userInfo.roles)
+  if (!hasRole) {
+    window.location.href = `/repair/login-hint?redirectUrl=${encodeURIComponent(redirectUrl)}`
+    return undefined
+  }
+
+  return userInfo
+}