Reorganize Blender Web execution around capabilities

docs/status/C3-002.md

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+# C3-002 Status
+
+status: done
+task: asset_catalog_positive_command
+gate: G3
+updated: 2026-08-23 America/New_York
+
+C3-002 adds `assetCatalogAppend`, a typed positive catalog command registered
+for the `ASSET_LIBRARY` target. It resolves and hash-verifies the active
+resource before using the C2 atomic Main transaction to append one entry.
+Duplicate IDs, malformed payloads, resource hash failure, and stale revisions
+remain non-mutating.
+
+The focused command test passed 3/3 assertions. Desktop and WASM produced the
+same normalized positive receipt and catalog snapshot. Deterministic receipt,
+protected legacy hashes, typecheck, context/corrective governance,
+task-context, and `git diff --check` all exited 0.
+
+Evidence and manifest: `tests/golden/corrective/C3-002/`.
+Next corrective task: `C3-003`.