Switch default interactive CLI routing to TUI v2

docs/README.md

@@ -43,6 +43,7 @@ This directory contains SeedPass project documentation.
 ## Discoverability Commands
 
 - `seedpass --help`
+- `seedpass --legacy-tui`
 - `seedpass <group> --help`
 - `seedpass tui2 --help`
 - `seedpass tui2 --check`

docs/tui_v2_cutover_decision.md

@@ -6,12 +6,9 @@ Decision owner: SeedPass maintainers
 
 ## Decision
 
-Do not switch the default interactive entrypoint (`seedpass`) to TUI v2 yet.
+Addendum (March 1, 2026, `beta`): default interactive routing now launches TUI v2 first, with `--legacy-tui` retained as a one-release fallback path.
 
-Recommended rollout:
-- Keep legacy TUI as default for the next release.
-- Keep `seedpass tui2` as the opt-in path.
-- Schedule default switch only after cutover gates below are met.
+Original recommendation in this memo was conservative (defer default switch until all gates were complete). The `beta` branch now reflects the cutover implementation requested during active hardening.
 
 ## Rationale