CREATE TABLE user_pad_favorites (
 user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 pad_id INTEGER NOT NULL REFERENCES pads(id) ON DELETE CASCADE,
 created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
 PRIMARY KEY (user_id, pad_id)
);
CREATE INDEX idx_user_pad_favorites_user_created ON user_pad_favorites(user_id, created_at DESC);

CREATE TABLE user_note_favorites (
 user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 note_id INTEGER NOT NULL REFERENCES notes(id) ON DELETE CASCADE,
 created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
 PRIMARY KEY (user_id, note_id)
);
CREATE INDEX idx_user_note_favorites_user_created ON user_note_favorites(user_id, created_at DESC);