feat(kebab-tui): p9-fb-12 partial — Mode enum + global i/Esc + auto switch + status label

도그푸딩 item 10 — vim 비익숙 사용자도 \"지금 키가 입력 vs 명령\" 명확히
구분 가능. 절반 ship: 사용자 가시 signal (mode label + auto flip + i/Esc
global) 만 land, 키 dispatch 의 input-empty heuristic 제거는 follow-up.

## 핵심 변경

- **`kebab_tui::Mode { Normal, Insert }`** enum + `Default = Normal`.
  - `Mode::label()` → `"-- NORMAL --"` / `"-- INSERT --"` (status bar
    문자열, 테스트로 핀).
  - `Mode::auto_for(pane)` → Library/Inspect/Jobs = Normal,
    Search/Ask = Insert. pane 전환 시 자동 적용.
- **`App.mode: Mode`** field. `App::new` 가 starting pane 의 auto
  mode 로 init.
- **run loop `mode_intercept(app, key)`** — pane dispatch 전에 호출:
  - Insert + `Esc` → Normal (어디서나, modifier 없음)
  - Normal + `i` (Library/Inspect/Jobs 만) → Insert
  - Search/Ask 의 `i` 는 fall-through (이미 Insert 라 typed char)
  - 그 외 fall-through
- **pane 전환 시** `app.mode = Mode::auto_for(p)` 자동 flip — 사용자가
  Tab 으로 Search 가면 자동으로 Insert.
- **status bar (header)** 에 mode label colored — Insert = Role::
  Success (green), Normal = Role::Heading (cyan + bold). a11y: 색은
  reinforcement, 글자가 authoritative signal.

## Deferred (HOTFIXES entry 추가)

spec p9-fb-12 의 \"기존 P9-3 ask 의 e/j/k input-empty heuristic 제거 —
mode 로 명확히\" 는 별 PR 로. 현재 dispatch 는 여전히:
- search.rs 의 `is_typing_mod` (SHIFT 만 typing 으로, CTRL/ALT 는 chord)
- ask.rs 의 input.is_empty() 가 e/j/k 를 navigation 으로 분기

테스트가 heuristic 에 의존해 있어, 회귀 surface 좁게 유지하려고 splitting.
spec status `in_progress` 유지 (not `completed`) — follow-up PR 가
heuristic 제거 + 완전 mode-authoritative 후 `completed` flip.

## 테스트

- 신규 3 unit (`Mode::auto_for` 모든 pane, label literals 핀,
  default = Normal)
- 기존 98 TUI 테스트 모두 통과 (heuristic 그대로라 회귀 0)
- workspace 전체 `cargo test --workspace --no-fail-fast -j 1` exit 0
- `cargo clippy --workspace --all-targets -- -D warnings` clean

## 문서

- README `kebab tui` 행: vim-style mode + auto NORMAL/INSERT + i/Esc
  안내
- HANDOFF entry (partial-ship 명시)
- HOTFIXES entry (heuristic 제거 deferral 사유)
- spec status planned → in_progress (NOT completed)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tasks/HOTFIXES.md

@@ -14,6 +14,31 @@ historical contract that was implemented; this file accumulates the
 deltas so phase 5+ readers can find the live behavior without diffing
 git history.
 
+## 2026-05-03 — p9-fb-12 partial: mode machine without dispatch removal
+
+**Spec amended**: `tasks/p9/p9-fb-12-tui-mode-machine.md` (status stays
+`in_progress`, NOT `completed`). Original contract: introduce vim
+NORMAL/INSERT modes globally AND remove `is_typing_mod` (search) +
+input-empty heuristic (ask) so the per-pane key dispatch becomes
+mode-authoritative.
+
+**What shipped**: Mode enum + `App.mode` field + global `i`/`Esc`
+interception in run loop + auto mode flip on pane switch
+(`Mode::auto_for(pane)`) + status-bar mode label (color-graded via
+`Role::Success` for Insert, `Role::Heading` for Normal). Status bar
+literals (`-- NORMAL --` / `-- INSERT --`) pinned.
+
+**Deferred to follow-up PR**: removal of the existing input-empty
+heuristics in `search::handle_key_search` and `ask::handle_key_ask`.
+These continue to gate j/k vs typing based on input buffer state.
+Tests rely on those heuristics, so the removal warrants its own
+focused PR (separate review, separate test sweep).
+
+**Why partial-ship**: the user-visible signal (mode label + auto
+flip + i/Esc) is the most load-bearing part of the spec; the
+heuristic removal is cleanup that doesn't change behavior anyone
+currently observes. Splitting keeps the PR review surface small.
+
 ## 2026-05-03 — p9-fb-17 migration number V004 → V005
 
 **Spec amended**: `tasks/p9/p9-fb-17-chat-session-storage.md` (frozen —

tasks/p9/p9-fb-12-tui-mode-machine.md

@@ -3,7 +3,7 @@ phase: P9
 component: kebab-tui
 task_id: p9-fb-12
 title: "TUI mode state machine (NORMAL / INSERT)"
-status: planned
+status: in_progress
 depends_on: []
 unblocks: [p9-fb-10, p9-fb-13]
 contract_source: ../../docs/superpowers/specs/2026-04-27-kebab-final-form-design.md