Complete M16 action select circle parity

docs/status/M16-GAP-00117.md

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+# M16-GAP-00117 Status
+
+status: done
+task: action.delete operator LOCAL_EXACT slice
+updated: 2026-08-20 America/New_York
+
+scope: Action Editor delete operation on `object:WebGapDeleteObject`.
+
+evidence:
+
+- Blender generator selects frame 3 in all three location channels and executes `bpy.ops.action.delete(confirm=False)` in a real Action Editor context; each channel retains frames 1 and 5.
+- WASM/Main reads the same three channels with matching `[1, 5]` keyframes; save/reopen is exact.
+- Malformed Blend input is rejected without mutating Main.
+- Generator, desktop checker, npm comparator, direct comparator, context handoff, and WASM-backed comparison exited 0.
+
+knownRisk: This slice covers deleting one selected frame from Action Editor FCurves; confirmation behavior and other editor contexts remain separate operator tasks.
+
+nextTask: `M16-GAP-00118`