refactor(api): add adapter layer for order/chat/review/dispute writes

lib/api/chat.ts

@@ -1,4 +1,6 @@
+import { allow, deny } from "@/lib/policy/assert"
 import { useChatStore } from "@/store/chat"
+import { useAuthStore } from "@/store/auth"
 
 export function listChatSessions() {
   return useChatStore.getState().sessions
@@ -11,3 +13,43 @@ export function getChatSessionById(sessionId: string) {
 export function listChatMessages(sessionId: string) {
   return useChatStore.getState().messages.filter((message) => message.sessionId === sessionId)
 }
+
+export function sendTextMessage(sessionId: string, content: string) {
+  const userId = useAuthStore.getState().user?.id
+  if (!userId) return deny("AUTH_REQUIRED", "请先登录")
+
+  const chatState = useChatStore.getState()
+  const session = chatState.sessions.find((item) => item.id === sessionId)
+  if (!session) return deny("NOT_FOUND", "会话不存在")
+  if (session.readonly) return deny("INVALID_STATUS", "当前会话只读")
+  if (!session.participants.some((participant) => participant.id === userId)) {
+    return deny("NOT_PARTICIPANT", "仅会话参与方可发送消息")
+  }
+
+  if (!content.trim()) {
+    return deny("VALIDATION_FAILED", "消息不能为空")
+  }
+
+  chatState.sendTextMessage(sessionId, userId, content)
+  return allow()
+}
+
+export function sendImageMessage(sessionId: string, imageUrl: string) {
+  const userId = useAuthStore.getState().user?.id
+  if (!userId) return deny("AUTH_REQUIRED", "请先登录")
+
+  const chatState = useChatStore.getState()
+  const session = chatState.sessions.find((item) => item.id === sessionId)
+  if (!session) return deny("NOT_FOUND", "会话不存在")
+  if (session.readonly) return deny("INVALID_STATUS", "当前会话只读")
+  if (!session.participants.some((participant) => participant.id === userId)) {
+    return deny("NOT_PARTICIPANT", "仅会话参与方可发送消息")
+  }
+
+  if (!imageUrl.trim()) {
+    return deny("VALIDATION_FAILED", "图片地址无效")
+  }
+
+  chatState.sendImageMessage(sessionId, userId, imageUrl)
+  return allow()
+}