fix(tui): reset rewound todos and keep commands local during edits

[hetaoBackend]

Change

Reproduce and fix two TUI failures around historical message editing:

• After choosing Edit in /history and submitting a replacement prompt, history reconciliation kept the old todo projection when the rewound history contained no todo event. Rebuild todos alongside the replaced history so discarded tasks disappear and earlier retained tasks are restored.
• While a historical edit was active, entering the exact /rewind command went through editSessionMessage as prompt text. Resolve local commands before intercepting an edit submission; skills, explicit message submissions, and ordinary slash-prefixed prose retain their message behavior.

Ordinary conversation-only rewind and /rewind outside editing were already passing. The new app-level regressions failed on the original implementation specifically for history editing, then passed with these changes.

Validation

• PASS: focused TUI app, controller, history-flow and command-flow suites: 4 files, 432 tests.
• PASS: VITEST_MAX_WORKERS=4 pnpm verify on clean commit 803ff35605fa2fd7f1dd5c2414895a73f7025053, full macOS profile: all 14 applicable gates. Capability gate: 169 files, 4542 passed / 14 skipped. Windows and npm release-archive gates are inapplicable to this local profile.
• Performance classification: perf:full because this changes history projection refresh. Remote performance and CI results are pending; latest-head full performance evidence is required before merge.
• NOT RUN: real M3.1/model acceptance, native terminal manual acceptance, and local Windows/Linux validation. Reproductions use the real TUI application with synthetic runtime fixtures.

Publication and contribution checks

• Changes preserve existing licenses and notices.
• No credentials, account data, real user content, internal source history, or private review material included.
• Only existing published files changed; no inventory or test-suite registration updates needed.
• No command syntax or documentation changes required. Offline test results are not live-service acceptance.

Maintainer handoff

Publication scope or license changes: none.

Shared-source port: pending.

---

^{Need help on this PR? Tag @codesmith-bot with what you need. Autofix is disabled.}