-- 流模板系统
CREATE TABLE IF NOT EXISTS flow_templates (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(200) NOT NULL,
    description TEXT,
    category VARCHAR(50),
    definition_json JSONB NOT NULL DEFAULT '{}',
    icon VARCHAR(50),
    sort_order INTEGER DEFAULT 0,
    is_builtin BOOLEAN DEFAULT false,
    usage_count INTEGER DEFAULT 0,
    created_by UUID REFERENCES users(id),
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_flow_templates_category ON flow_templates(category);
CREATE INDEX IF NOT EXISTS idx_flow_templates_sort ON flow_templates(sort_order);