-- Per-user saved terminal tab layout for an agent: the named tabs and the tmux
-- session each maps to, so a user can restore "their" terminal — the same tabs
-- and sessions — after logging out and back in (even on another device). The
-- live shell state resumes only while the agent's terminal container is alive;
-- this preserves the tab/session mapping regardless.
CREATE TABLE terminal_tabs (
    user_id      UUID NOT NULL REFERENCES users (id) ON DELETE CASCADE,
    agent_id     UUID NOT NULL REFERENCES agents (id) ON DELETE CASCADE,
    workspace_id UUID NOT NULL REFERENCES workspaces (id) ON DELETE CASCADE,
    layout       JSONB NOT NULL,
    updated_at   TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (user_id, agent_id)
);