Why: Prepare genuine Dev #488 for its final window using actually merged component versions and the authorized agent merge scope. Evidence: Frontend PR 73 tree-identical merge and independent review; RDM PR 301 GATE3044, independent replay, Root merge ef510. Full Dev combination and exact-head CI remain pending. Impact: Advances the frontend pin and task record only; current target main sync follows in the scheduled final window. Refs: Dev PR #488; Frontend PR #73; RDM PR #301; Issue #518
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