feat(post): persist new posts and wire like interactions

lib/api/posts.ts

@@ -1,13 +1,13 @@
-import { mockPosts } from "@/lib/mock"
+import { usePostStore } from "@/store/posts"
 
 export function listPosts() {
-  return mockPosts
+  return usePostStore.getState().posts
 }
 
 export function getPostById(postId: string) {
-  return mockPosts.find((post) => post.id === postId)
+  return usePostStore.getState().posts.find((post) => post.id === postId)
 }
 
 export function listPostsByAuthor(userId: string) {
-  return mockPosts.filter((post) => post.author.id === userId)
+  return usePostStore.getState().posts.filter((post) => post.author.id === userId)
 }