diff --git a/app/(account)/verify/page.tsx b/app/(account)/verify/page.tsx
index 360e5ad..469b013 100644
--- a/app/(account)/verify/page.tsx
+++ b/app/(account)/verify/page.tsx
@@ -42,14 +42,14 @@ export default function VerifyPage() {
   )
 
   const buildMaterials = () => {
-    const materials: Record<string, string> = {
+    const materials = {
       realName,
       idNumber,
       gameProfile,
       idCardFront: "mock://idCardFront",
       idCardBack: "mock://idCardBack",
       gameScreenshot: "mock://gameScreenshot",
-    }
+    } satisfies Record<string, string>
 
     return materials
   }
diff --git a/components/header.tsx b/components/header.tsx
index efa3a31..c143296 100644
--- a/components/header.tsx
+++ b/components/header.tsx
@@ -35,12 +35,12 @@ import { useState } from "react"
 
 import { canAccessDashboard } from "@/components/role-guard"
 
-const roleLabels: Record<UserRole, string> = {
+const roleLabels = {
   consumer: "客户",
   player: "打手",
   owner: "店主",
   admin: "管理员",
-}
+} satisfies Record<UserRole, string>
 
 export function Header() {
   const [mobileOpen, setMobileOpen] = useState(false)
diff --git a/lib/types.ts b/lib/types.ts
index 8f076c5..8febf19 100644
--- a/lib/types.ts
+++ b/lib/types.ts
@@ -1,11 +1,13 @@
 // All `id` fields come from backend snowflake int64.
 // Frontend stores them as strings to avoid JS number precision issues.
 
+export type SnowflakeId = string
+
 export type UserRole = "consumer" | "player" | "owner" | "admin"
 export type VerificationStatus = "pending" | "approved" | "rejected"
 
 export interface User {
-  id: string
+  id: SnowflakeId
   username: string
   email?: string
   nickname: string
@@ -19,16 +21,16 @@ export interface User {
 }
 
 export interface Game {
-  id: string
+  id: SnowflakeId
   name: string
   icon: string
   category: "MOBA" | "FPS" | "动作" | "RPG"
 }
 
 export interface PlayerService {
-  id: string
-  playerId: string
-  gameId: string
+  id: SnowflakeId
+  playerId: SnowflakeId
+  gameId: SnowflakeId
   gameName: string
   title: string
   description: string
@@ -39,7 +41,7 @@ export interface PlayerService {
 }
 
 export interface Player {
-  id: string
+  id: SnowflakeId
   user: User
   rating: number
   totalOrders: number
@@ -47,13 +49,13 @@ export interface Player {
   status: "available" | "busy" | "offline"
   games: string[]
   services: PlayerService[]
-  shopId?: string
+  shopId?: SnowflakeId
   shopName?: string
   tags: string[]
 }
 
 export interface Shop {
-  id: string
+  id: SnowflakeId
   owner: User
   name: string
   banner?: string
@@ -91,12 +93,12 @@ export type OrderStatus =
   | "cancelled"
 
 export interface Order {
-  id: string
-  consumerId: string
+  id: SnowflakeId
+  consumerId: SnowflakeId
   consumerName: string
-  playerId: string
+  playerId: SnowflakeId
   playerName: string
-  shopId?: string
+  shopId?: SnowflakeId
   shopName?: string
   service: PlayerService
   status: OrderStatus
@@ -109,12 +111,12 @@ export interface Order {
 }
 
 export interface Review {
-  id: string
-  orderId: string
-  fromUserId: string
+  id: SnowflakeId
+  orderId: SnowflakeId
+  fromUserId: SnowflakeId
   fromUserName: string
   fromUserAvatar: string
-  toUserId: string
+  toUserId: SnowflakeId
   rating: number
   content?: string
   sealed: boolean
@@ -122,9 +124,9 @@ export interface Review {
 }
 
 export interface Dispute {
-  id: string
-  orderId: string
-  initiatorId: string
+  id: SnowflakeId
+  orderId: SnowflakeId
+  initiatorId: SnowflakeId
   initiatorName: string
   reason: string
   evidence: string[]
@@ -134,8 +136,8 @@ export interface Dispute {
 }
 
 interface BaseChatSession {
-  id: string
-  participants: { id: string; name: string; avatar: string }[]
+  id: SnowflakeId
+  participants: { id: SnowflakeId; name: string; avatar: string }[]
   lastMessage?: string
   lastMessageAt?: string
   unreadCount: number
@@ -144,7 +146,7 @@ interface BaseChatSession {
 
 export interface OrderChatSession extends BaseChatSession {
   type: "order"
-  orderId: string
+  orderId: SnowflakeId
 }
 
 export interface ConsultationChatSession extends BaseChatSession {
@@ -155,9 +157,9 @@ export interface ConsultationChatSession extends BaseChatSession {
 export type ChatSession = OrderChatSession | ConsultationChatSession
 
 export interface ChatMessage {
-  id: string
-  sessionId: string
-  senderId: string
+  id: SnowflakeId
+  sessionId: SnowflakeId
+  senderId: SnowflakeId
   senderName: string
   senderAvatar: string
   type: "text" | "image" | "system"
@@ -166,15 +168,15 @@ export interface ChatMessage {
 }
 
 export interface Post {
-  id: string
+  id: SnowflakeId
   author: User
   authorRole: UserRole
   title: string
   content: string
   images: string[]
   tags: string[]
-  linkedOrderId?: string
-  quotedPostId?: string
+  linkedOrderId?: SnowflakeId
+  quotedPostId?: SnowflakeId
   likeCount: number
   commentCount: number
   liked: boolean
@@ -183,8 +185,8 @@ export interface Post {
 }
 
 export interface Comment {
-  id: string
-  postId: string
+  id: SnowflakeId
+  postId: SnowflakeId
   author: User
   content: string
   likeCount: number
@@ -193,7 +195,7 @@ export interface Comment {
 }
 
 export interface Notification {
-  id: string
+  id: SnowflakeId
   type: "order" | "community" | "system"
   title: string
   content: string
@@ -203,7 +205,7 @@ export interface Notification {
 }
 
 export interface WalletTransaction {
-  id: string
+  id: SnowflakeId
   type: "topup" | "payment" | "income" | "withdrawal" | "refund"
   amount: number
   description: string
@@ -211,9 +213,9 @@ export interface WalletTransaction {
 }
 
 export interface Favorite {
-  id: string
-  userId: string
+  id: SnowflakeId
+  userId: SnowflakeId
   targetType: "player" | "shop"
-  targetId: string
+  targetId: SnowflakeId
   createdAt: string
 }