Complete M16 action select circle parity

docs/status/M16-GAP-00101.md

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+# M16-GAP-00101 Status
+
+status: done
+task: UV_PROJECT modifier LOCAL_EXACT slice
+updated: 2026-08-20 America/New_York
+
+scope: Mesh UV_PROJECT modifier stack exposure for `mesh:WebGapUvProjectMesh`.
+
+evidence:
+
+- Desktop fixture exposes `WebGapUvProject` as UV_PROJECT type code 15; save/reopen is exact.
+- WASM/Main exposes the same UV_PROJECT 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: UV projection evaluation remains metadata-only; this slice covers modifier stack transport and base metadata only.
+
+nextTask: `M16-GAP-00102`