refactor(community): extract comment store and post/comment API adapters

lib/api/posts.ts

@@ -1,3 +1,6 @@
+import { allow, deny } from "@/lib/policy/assert"
+import { addNotification } from "@/lib/api/notifications"
+import { useAuthStore } from "@/store/auth"
 import { usePostStore } from "@/store/posts"
 
 export function listPosts() {
@@ -11,3 +14,30 @@ export function getPostById(postId: string) {
 export function listPostsByAuthor(userId: string) {
   return usePostStore.getState().posts.filter((post) => post.author.id === userId)
 }
+
+export function togglePostLike(postId: string) {
+  const user = useAuthStore.getState().user
+  if (!user) {
+    return deny("AUTH_REQUIRED", "请先登录")
+  }
+
+  const post = usePostStore.getState().posts.find((item) => item.id === postId)
+  if (!post) {
+    return deny("NOT_FOUND", "帖子不存在")
+  }
+
+  const shouldNotify = !post.liked
+
+  usePostStore.getState().togglePostLike(postId)
+
+  if (shouldNotify) {
+    addNotification({
+      type: "community",
+      title: "帖子收到点赞",
+      content: `《${post.title}》有新的点赞`,
+      link: `/post/${post.id}`,
+    })
+  }
+
+  return allow()
+}