Continue Blender Web parity task handoff

docs/status/M16-GAP-00205.md

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+# M16-GAP-00205 Status
+
+status: done
+task: anim.separate_slots operator LOCAL_EXACT slice
+updated: 2026-08-22 America/New_York
+
+scope:
+
+- The minimal fixture has two objects using separate slots in one layered action. Desktop runs `ANIM_OT_separate_slots` and creates one action per slot, reassigning the two objects.
+- WASM/Main observes the two new action targets and their slot-specific channels; the original action is empty and omitted from the animation snapshot.
+
+evidence:
+
+- Desktop evidence records `poll=true`, `FINISHED`, `SLOTS_SEPARATED`, both new action assignments, and exact save/reopen. Repeated checker runs preserve the initial evidence and fixture hash.
+- WASM/Main compares both separated actions, preserves them across save/reopen, and rejects malformed Blend input without Main mutation.
+- Fixture generation, desktop checker, npm comparator, direct comparator, and task-context checks passed. Chromium-only policy was preserved; no Firefox/WebKit run was made.
+
+nextTask: `M16-GAP-00206`