chore: initial database schema

.gitignore

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+node_modules
+dist
+.wrangler
+.env
+.next

database/01_init.sql

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+CREATE TABLE IF NOT EXISTS users (
+  id TEXT PRIMARY KEY,
+  email TEXT NOT NULL UNIQUE,
+  full_name TEXT,
+  display_name TEXT,
+  bio TEXT,
+  avatar_url TEXT,
+  role TEXT DEFAULT 'user',
+  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+  username TEXT UNIQUE,
+  mauth_token TEXT,
+  phone TEXT,
+  citizen_id TEXT,
+  is_banned INTEGER DEFAULT 0,
+  updated_at TEXT DEFAULT CURRENT_TIMESTAMP
+);
+CREATE TABLE IF NOT EXISTS posts (
+  id TEXT PRIMARY KEY,
+  author_email TEXT NOT NULL,
+  content TEXT NOT NULL,
+  image_url TEXT,
+  like_count INTEGER NOT NULL DEFAULT 0,
+  comment_count INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+  updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (author_email) REFERENCES users(email) ON DELETE CASCADE
+);
+CREATE TABLE IF NOT EXISTS comments (
+  id TEXT PRIMARY KEY,
+  post_id TEXT NOT NULL,
+  author_email TEXT NOT NULL,
+  content TEXT NOT NULL,
+  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE CASCADE,
+  FOREIGN KEY (author_email) REFERENCES users(email) ON DELETE CASCADE
+);
+CREATE TABLE IF NOT EXISTS post_likes (
+  id TEXT PRIMARY KEY,
+  post_id TEXT NOT NULL,
+  user_email TEXT NOT NULL,
+  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE CASCADE,
+  FOREIGN KEY (user_email) REFERENCES users(email) ON DELETE CASCADE,
+  UNIQUE(post_id, user_email)
+);
+CREATE TABLE IF NOT EXISTS follows (
+  id TEXT PRIMARY KEY,
+  follower_email TEXT NOT NULL,
+  following_email TEXT NOT NULL,
+  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (follower_email) REFERENCES users(email) ON DELETE CASCADE,
+  FOREIGN KEY (following_email) REFERENCES users(email) ON DELETE CASCADE,
+  UNIQUE(follower_email, following_email)
+);
+CREATE TABLE IF NOT EXISTS notifications (
+  id TEXT PRIMARY KEY,
+  recipient_email TEXT NOT NULL,
+  actor_email TEXT NOT NULL,
+  type TEXT NOT NULL,
+  post_id TEXT,
+  read INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY (recipient_email) REFERENCES users(email) ON DELETE CASCADE,
+  FOREIGN KEY (actor_email) REFERENCES users(email) ON DELETE CASCADE,
+  FOREIGN KEY (post_id) REFERENCES posts(id) ON DELETE SET NULL
+);
+CREATE INDEX IF NOT EXISTS idx_posts_author ON posts(author_email);
+CREATE INDEX IF NOT EXISTS idx_posts_created ON posts(created_at);
+CREATE INDEX IF NOT EXISTS idx_comments_post ON comments(post_id);
+CREATE INDEX IF NOT EXISTS idx_post_likes_post_user ON post_likes(post_id, user_email);
+CREATE INDEX IF NOT EXISTS idx_follows_follower ON follows(follower_email);
+CREATE INDEX IF NOT EXISTS idx_follows_following ON follows(following_email);
+CREATE INDEX IF NOT EXISTS idx_notifications_recipient ON notifications(recipient_email, created_at);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_users_email ON users(email);