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

store/comments.ts

@@ -0,0 +1,47 @@
+import { create } from "zustand"
+import { generateId } from "@/lib/id"
+import { mockComments } from "@/lib/mock"
+import type { Comment, User } from "@/lib/types"
+
+interface CommentState {
+  comments: Comment[]
+  addComment: (postId: string, author: User, content: string) => Comment | null
+  toggleCommentLike: (commentId: string) => void
+}
+
+export const useCommentStore = create<CommentState>((set) => ({
+  comments: mockComments,
+  addComment: (postId, author, content) => {
+    const normalizedContent = content.trim()
+    if (!normalizedContent) return null
+
+    const comment: Comment = {
+      id: generateId("comment"),
+      postId,
+      author,
+      content: normalizedContent,
+      likeCount: 0,
+      liked: false,
+      createdAt: new Date().toISOString(),
+    }
+
+    set((state) => ({
+      comments: [...state.comments, comment],
+    }))
+
+    return comment
+  },
+  toggleCommentLike: (commentId) => {
+    set((state) => ({
+      comments: state.comments.map((comment) => {
+        if (comment.id !== commentId) return comment
+        const liked = !comment.liked
+        return {
+          ...comment,
+          liked,
+          likeCount: liked ? comment.likeCount + 1 : Math.max(0, comment.likeCount - 1),
+        }
+      }),
+    }))
+  },
+}))