test(redesign): accept Phase 4 foundations with migration gates

docs/roadmap/todo.md

@@ -11,6 +11,7 @@ Status reconciled: 2026-09-13.
 - **P4-04-O01 — existing fixed-toast overlap:** export-success feedback can temporarily obscure a bottom-of-page action. Review shared feedback placement with later shell work; P4-04 leaves timing/placement unchanged and verifies the action after normal dismissal. [Evidence](../redesign/phase-4/p4-04/README.md).
 - **P4-04-O02 — existing SQLite notification-save contention:** overlapping native preference read/write requests reproduced HTTP 500 with SQLite error 5 in two of ten local runs. The sequential UI test now awaits and requires the save response before readback; server concurrency remains unresolved. Investigate separately from page-layout/density work. [Evidence](../redesign/phase-4/p4-04/README.md).
 - **P4-05-O01 — existing table localization debt:** status menu/bulk actions expose raw English status keys in Bokmål, and applied dates follow the browser locale. Keep status values/date semantics intact until the Phase 5 Jobs localization work; P4-05 localizes its new density/paging/accessible names only. [Evidence](../redesign/phase-4/p4-05/README.md).
+- **P4-06-O01/O02 — existing responsive shell debt:** a persisted collapsed desktop sidebar removes visible labels from the mobile drawer and puts its first focused row under the fixed app bar; a long synthetic admin version badge overlaps the 320px header. Reproduced manually and traced to pre-Phase-4 code. Gate the later shell migration on separate mobile-label/focus and long-metadata reflow proof; no shell remediation is included in P4-06. [Evidence](../redesign/phase-4/p4-06/README.md).
 - **F04/B06 — open:** complete the authorized main release and production ingress/runtime verification; the browser gate and runner diagnostics remain unresolved. No gate should be bypassed.
 
 ## Delivery and feature gates