feat(member): 회원 설정/헤더 상태 UI와 관리자 멤버 관리 추가

로그인 상태를 헤더에서 즉시 인지하고 계정 관리를 이어갈 수 있도록 사용자 설정과 관리자 멤버 관측 기능을 연결했다.

Co-authored-by: Cursor <cursoragent@cursor.com>

db/migrations/010_add_members_and_comments.sql

@@ -0,0 +1,30 @@
+CREATE TABLE IF NOT EXISTS users (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  username TEXT NOT NULL,
+  email TEXT NOT NULL UNIQUE,
+  password_hash TEXT NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS users_email_idx
+  ON users (email);
+
+CREATE TABLE IF NOT EXISTS comments (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  post_id UUID NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
+  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  parent_id UUID REFERENCES comments(id) ON DELETE CASCADE,
+  body TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'published',
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  CONSTRAINT comments_status_check CHECK (status IN ('published', 'pending', 'blocked'))
+);
+
+CREATE INDEX IF NOT EXISTS comments_post_id_created_at_idx
+  ON comments (post_id, created_at ASC);
+
+CREATE INDEX IF NOT EXISTS comments_parent_id_idx
+  ON comments (parent_id);
+