-- Migration 003: Global Settings
-- Stores application-wide configuration managed by admins.

CREATE TABLE IF NOT EXISTS global_settings (
    key VARCHAR(100) PRIMARY KEY,
    value JSONB NOT NULL DEFAULT '{}'::jsonb,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_by UUID REFERENCES users(id)
);

-- Seed defaults
INSERT INTO global_settings (key, value) VALUES
    ('registration', '{"enabled": true}'::jsonb),
    ('site', '{"name": "Chat Switchboard", "tagline": "Multi-Model AI Chat"}'::jsonb)
ON CONFLICT (key) DO NOTHING;