새 crate `kebab-tui` 가 §8 facade rule 따라 `kebab-app` 만 import.
Ratatui 0.28 + crossterm 0.28 기반 shell 이 다음을 제공:
- `App` 구조체: config + focus + library + 3 Option sub-state slot
(search/ask/inspect — p9-2/3/4 가 자기 모듈에서 채우는 parallel-safety
contract). p9-1 외에 App 정의 손대지 않음.
- `Pane` enum (Library/Search/Ask/Inspect/Jobs).
- `KeyOutcome` (Continue/Quit/SwitchPane/Refresh).
- `LibraryState` + 내부 inner: docs / list_state / filter / filter_edit /
needs_refresh / loading / pending_g.
- `render_library` (Frame, area, &App) — heading/body, filter overlay
toggleable, Korean/wide-char 너비는 unicode-width 로 계산.
- `handle_key_library`: j/k/Down/Up 이동, gg/G 끝, f 필터 overlay,
/=>Search ?=>Ask Enter=>Inspect, q/Esc 종료. error overlay 가 켜
있으면 어떤 키든 dismiss.
- 필터 overlay: tags_any (CSV) + lang 두 필드, Tab cycle, Enter
apply→Refresh, Esc cancel.
- `ErrorOverlay`: anyhow chain 캡쳐 후 popup 렌더 (Clear + 빨간 border).
- 터미널 lifecycle: `TuiTerminal` 가 enter raw mode + alt screen,
Drop 이 종료 시 (panic 포함) restore — 사용자 쉘 깨지지 않게.
- 비동기 없음: facade 호출은 main thread 동기. v1 의 brief hang 수용.
CLI: `kebab tui` 서브커맨드 추가, --config 받아 App::new + run.
테스트 10건 (`tests/library.rs`, TestBackend 사용):
- 빈 library / 3-doc render / q,Esc quit / / Search 전환 / ? Ask 전환
- Enter 빈 list 무동작 / Enter Inspect 전환 / j 이동 (3-step clamp) /
f 필터 overlay → 입력 → Enter Refresh.
Test seam: `App::populate_library_for_testing` (#[doc(hidden)]) 가
`pub(crate)` inner 를 우회. spec parallel-safety contract 그대로 유지.
Spec deviation (HOTFIXES `2026-05-02 P9-1`):
- `render_library` 의 `<B: Backend>` generic 제거 — ratatui 0.28 의 Frame
이 backend-agnostic.
- `populate_library_for_testing` 추가 (test seam, 공식 API 아님).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Address 8 issues found in spec audit (post PR #2):
1. §refs label: distinguish design vs report sections in p3-1 / p3-2 / p4-2 /
p9-1 / p9-5 contract_sections (e.g., "report §11.2 Ollama" not "§11.2").
2. mock feature gate: gate MockEmbedder (p3-1) and MockLanguageModel (p4-1)
behind `mock` cargo feature, default OFF; add CI symbol-scan as DoD item.
3. Warning type unification: p1-2 frontmatter now emits
`kb_parse_types::Warning` (matches p1-3 / p1-4); drops crate-internal type.
4. p4-3 streaming thread: explicitly single-threaded inside RagPipeline::ask;
collection + sink.send share the calling thread, no race. UI concurrency
is callers responsibility (TUI worker thread pattern in p9-3).
5. p6-2 tesseract version: noted that `tesseract` 0.13 has no stable Rust
`version()` accessor; use TessVersion FFI or shell-out + cache approach.
6. p9-* App struct extensions: introduce `kb_tui::{Library,Search,Ask,Inspect}State`
slots in p9-1 forward-decl form; p9-2/3/4 fill bodies in their own crate
without editing `App`. Parallel-safety contract added.
7. p3-3 cosine score: shift `(sim+1)/2` instead of clamp; preserve ranking
signal between unrelated and opposite vectors. Clamp reserved for NaN.
8. fixtures/ root: p0-1 DoD now creates all fixture subdirs with .gitkeep so
downstream tasks have a stable target path.
