refactor(mock): remove lib/mock fixtures and empty stores

store/chat.ts

@@ -1,5 +1,4 @@
 import { generateId } from "@/lib/id"
-import { mockChatMessages, mockChatSessions, mockUsers } from "@/lib/mock"
 import type { ChatMessage, ChatSession, Order } from "@/lib/types"
 import { create } from "zustand"
 
@@ -11,8 +10,8 @@ interface ChatState {
   sendImageMessage: (sessionId: string, actorId: string, imageUrl: string) => void
 }
 
-function resolveAvatar(userId: string) {
-  return mockUsers.find((user) => user.id === userId)?.avatar ?? ""
+function resolveAvatar(_userId: string) {
+  return ""
 }
 
 function shouldReadonly(status: Order["status"]) {
@@ -20,8 +19,8 @@ function shouldReadonly(status: Order["status"]) {
 }
 
 export const useChatStore = create<ChatState>((set, get) => ({
-  sessions: mockChatSessions,
-  messages: mockChatMessages,
+  sessions: [],
+  messages: [],
   ensureOrderSession: (order) => {
     const existing = get().sessions.find(
       (session) => session.type === "order" && session.orderId === order.id,