chore(tui): migrate ratatui to clear lru RustSec warning

[xodapi]

Parent: #189

Context

RustSec audit on 2026-07-06 found RUSTSEC-2026-0002 through ratatui 0.28.1 -> lru 0.12.5 and one paste warning through ratatui.

Scope

• Evaluate upgrading ratatui from 0.28.x to 0.30.x.
• Update TUI code only as required by API changes.
• Refresh TUI snapshot tests if rendering intentionally changes.
• Do not touch GUI/Android/CI.

Acceptance Criteria

• cargo audit --no-fetch --stale no longer reports the ratatui-side lru 0.12.5 path.
• TUI snapshot tests pass or are intentionally updated.
• cargo test --locked, cargo clippy --all-targets -- -D warnings, and cargo fmt --check pass.

[xodapi]

⏸️ Проект временно заморожен оркестратором. Не брать агентам до явного возобновления работ.