Fix nullable stored-history constructor switching

harness/STATE.md

@@ -44,7 +44,7 @@ Implemented locally, awaiting compilation:
   are written. A bounded exact caller/use return path and scoped mounted-scroll
   restoration are implemented with regressions, also untested.
 - Advanced typed stored-history editor uses existing OpenAPI type descriptors;
-  ten focused tests cover typed selectors, historical IDs, invalid raw input,
+  twelve focused tests cover typed selectors, historical IDs, invalid raw input,
   recovery and source/history. Core validation remains authoritative.
 - Normative catalogs now include ExchangeCategory, ContextualLink and both
   Exchange trace pairs. Manual trace help and scope source version corrected;
@@ -62,12 +62,25 @@ successfully; stable **1.98.1** GNU/LLVM, rustfmt and Clippy installed.
 job. Locked dependency fetch is local exec session **13108**. No build/test pass
 is established; the target cache is still cold.
 
-The coherent candidate passed `cargo fmt --all` and `git diff --check`. It is
-published as an **UNTESTED integration snapshot** so the other host can use its
-warm build cache; publication is not acceptance. Their broader architecture
+The coherent candidate `01bb52a` passed `cargo fmt --all` and `git diff --check`.
+Direct push failed because this fresh host has no Git credentials. Authenticated
+Gitea MCP transferred its exact verified Git bundle through
+`codex/behavior-transfer-20260910` (`harness/transfers/behavior-01bb52a.bundle.b64`),
+prerequisite `1797516`, decoded SHA256
+`85A38B00207036DCB8DB24ED4A7E80B2BE670275EEB7B00413D36153322ADA5D`.
+This **UNTESTED integration snapshot** lets the other host use its warm cache;
+transfer is not acceptance. Their broader architecture
 palette/Escape repair should be reconciled with our overlapping compile/stale
 repairs while retaining the additional invariant tests. Their measured minimum
 scenario canvas is too small; they own the subsequent layout implementation.
+Their isolated palette commit is `7d1df4f`, fetched locally for reconciliation.
+
+Independent F1 review found a real optional-value cache collision in `01bb52a`.
+The follow-up distinguishes null/scalar/list/tagged constructor identities and
+adds actual inner selector-event tests. Independent source recheck found no
+remaining collision; execution is still pending. The original full-platform
+fetch was stopped after network timeouts; current Windows desktop test build
+is exec session **51036**, compiling dependencies. Root owns this Cargo lease.
 
 Next: focused `architecture_authoring_tests`,
 `behavior::topology`, `direct_clicked`, caller-navigation and `history_fields::tests`,