Capture M16 gap execution artifacts

docs/status/M16-GAP-00163.md

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+# M16-GAP-00163 Status
+
+status: done
+task: anim.channels_rename operator LOCAL_EXACT slice
+updated: 2026-08-21 America/New_York
+
+scope:
+
+- Action Editor `anim.channels_rename` renames the first disabled F-Curve RNA path to `rotation_euler`.
+
+evidence:
+
+- Blender desktop and WASM/Main expose the same three channels: `rotation_euler[0]`, `location_missing[1]`, and `location_missing[2]` with identical keyframes.
+- WASM preserves the disabled flags for the two invalid control paths; save/reopen preserves the animation snapshot exactly.
+- Fixture generation, desktop checker, npm comparator, direct comparator, malformed Blend rejection, context governance, and artifact hashing passed.
+
+nextTask: `M16-GAP-00164`