-- Migration: Add links table for link management
-- Created: 2026-08-22

CREATE TABLE IF NOT EXISTS links (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  title TEXT NOT NULL,
  url TEXT NOT NULL,
  category TEXT NOT NULL DEFAULT 'external' CHECK (category IN ('external', 'internal', 'resource', 'tool')),
  description TEXT,
  icon TEXT,
  sort_order INTEGER NOT NULL DEFAULT 0,
  visible INTEGER NOT NULL DEFAULT 1 CHECK (visible IN (0, 1)),
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_links_visible ON links(visible, sort_order);
CREATE INDEX IF NOT EXISTS idx_links_category ON links(category, visible, sort_order);