Complete M16 action select circle parity

docs/status/M16-GAP-00107.md

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+# M16-GAP-00107 Status
+
+status: done
+task: VOLUME_TO_MESH modifier LOCAL_EXACT slice
+updated: 2026-08-20 America/New_York
+
+scope: Mesh-hosted VOLUME_TO_MESH modifier stack exposure for `mesh:WebGapVolumeToMeshMesh`.
+
+evidence:
+
+- Desktop fixture exposes `WebGapVolumeToMesh` as VOLUME_TO_MESH type code 58; save/reopen is exact.
+- WASM/Main exposes the same VOLUME_TO_MESH stack entry with matching generic visibility flags; save/reopen is exact.
+- Malformed Blend input is rejected without mutating Main.
+- Generator, npm comparator, and direct comparator exited 0.
+
+knownRisk: Volume-to-mesh evaluation remains metadata-only; this slice covers modifier stack transport and base metadata only.
+
+nextTask: `M16-GAP-00108`