-- Add sessions table for web authentication
CREATE TABLE IF NOT EXISTS sessions (
    id INTEGER PRIMARY KEY NOT NULL,
    user_id INTEGER NOT NULL,
    session_token_hash TEXT NOT NULL,
    created_at TEXT NOT NULL,
    expires_at TEXT NOT NULL,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_sessions_token_hash ON sessions(session_token_hash);
CREATE INDEX IF NOT EXISTS idx_sessions_user_id ON sessions(user_id);
CREATE INDEX IF NOT EXISTS idx_sessions_expires_at ON sessions(expires_at);