-- Dross improvements: versioned, owner-gated CSS-layer changes to the Void itself.
-- Each row is one improvement; rollback/restore is a status flip — instant, reversible.
CREATE TABLE dross_improvements (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  summary TEXT NOT NULL,
  css TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'pending'
    CHECK (status IN ('pending', 'active', 'rolled_back', 'rejected')),
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  decided_at TIMESTAMPTZ,
  decided_by TEXT
);
CREATE INDEX dross_improvements_status ON dross_improvements(status);