Add TUI v2 retryable error recovery flows

docs/tui_v2_parity_checklist.md

@@ -30,7 +30,9 @@ This checklist tracks readiness to switch default interactive mode from legacy T
 - [x] First UX/perf pass for large vaults.
   - paginated entry list rendering (`p`/`n`, `page-*` palette commands)
   - document content preview truncation in detail panel
-- [ ] Error messaging and recovery flow review.
+- [x] Error messaging and recovery flow review.
+  - unified failure status messaging
+  - retry shortcut (`x`) and palette `retry` command
 - [ ] Cutover decision memo (`seedpass` default switch timing).
 
 ## Risks Remaining

docs/tui_v2_plan.md

@@ -62,7 +62,7 @@ Goal: Introduce a modern, modular TUI (`seedpass tui2`) without rewriting core l
 ### Phase 4: Cutover readiness
 - [x] Feature parity checklist against legacy TUI.
 - [x] UX/perf pass for large vaults.
-- [ ] Error messaging and recovery flows.
+- [x] Error messaging and recovery flows.
 - [ ] Decide default switch timing (`seedpass` -> `tui2`).
 
 ## Test Strategy