fix(extension): UTF-8 encoding + noise filter enhancement (v0.5.39)

- http-bridge.ts: add req.setEncoding('utf8') to all POST handlers
  to fix Korean text corruption in pending/chat/dump payloads
- observer-script.ts: add inline pre-strip in cleanLines() for
  Material icon names concatenated by textContent without newlines
- observer-script.ts: apply cleanLines() to codeText extraction
- known-issues: document UTF-8 encoding and noise filter issues

.agents/references/known-issues.md

@@ -4,12 +4,30 @@
 
 > **<2A>씠 <20>뙆<EFBFBD>씪<EFBFBD><EC94AA><EFBFBD> SSOT(Single Source of Truth)<29>엯<EFBFBD>땲<EFBFBD>떎.**
 
-> <EFBFBD>뵒踰꾧퉭<EFBFBD>씠<EFBFBD>굹 援ы쁽 <20>쟾<EFBFBD>뿉 **諛섎뱶<EC848E>떆** <20>씠 <20>뙆<EFBFBD>씪<EFBFBD>쓣 <20>솗<EFBFBD>씤<EFBFBD>븯<EFBFBD>꽭<EFBFBD>슂.
-
-> <EFBFBD>꽭<EFBFBD>뀡 醫낅즺 <20>떆 <20>깉濡<EAB989> 諛쒓껄<EC9293>맂 <20>씠<EFBFBD>뒋瑜<EB928B> <20>씠 <20>뙆<EFBFBD>씪<EFBFBD>뿉 異붽<E795B0><EBB6BD><EFBFBD>빀<EFBFBD>땲<EFBFBD>떎.
-
+> <EFBFBD>뵒踰꾧퉭<EFBFBD>씠<EFBFBD>굹 援ы쁽 <20>쟾<EFBFBD>뿉 **諛섎뱶<EC848E>떆** <20>씠 <20>뙆<EFBFBD>씪<EFBFBD>쓣 <20>솗<EFBFBD>씤<EFBFBD>븯<EFBFBD>꽭<EFBFBD>슂.
+
+> <EFBFBD>꽭<EFBFBD>뀡 醫낅즺 <20>떆 <20>깉濡<EAB989> 諛쒓껄<EC9293>맂 <20>씠<EFBFBD>뒋瑜<EB928B> <20>씠 <20>뙆<EFBFBD>씪<EFBFBD>뿉 異붽<E795B0><EBB6BD><EFBFBD>빀<EFBFBD>땲<EFBFBD>떎.
+
+
+
+# Known Issues & Lessons Learned
+
+> **씠 뙆씪 SSOT(Single Source of Truth)엯땲떎.**
+> 뵒踰꾧퉭씠굹 援ы쁽 쟾뿉 **諛섎뱶떆** 씠 뙆뙆씪쓣 솗씤븯꽭슂.
 > 꽭뀡 醫낅즺 떆 깉濡 諛쒓껄맂 씠뒋瑜 씠 뙆뙆씪뿉 異붽빀땲떎.
 
+> [!TIP]
+> 빐寃 셿猷뚮맂 怨쇨굅 씠뒋뒗 [`known-issues-archive.md`](file:///c:/Users/Variet-Worker/Desktop/gravity_control/.agents/references/known-issues-archive.md)뿉 蹂닿릺뼱 엳뒿땲떎.
+> 鍮꾩듂븳 臾몄젣媛 옱諛쒗븯硫 archive뿉꽌 寃깋븯꽭슂.
+
+---
+
+### [2026-04-13] [Extension] HTTP Bridge UTF-8 인코딩 깨짐 — 한글 description 손실
+- **증상**: pending/ 파일의 description 필드에서 한글이 `[AI  ]`처럼 깨져서 저장됨. Discord로 전달되는 승인 요청 본문도 깨짐
+- **원인**: Node.js HTTP 서버의 `req.on('data', chunk)` 콜백에서 chunk가 Buffer 타입으로 전달되는데, `body += chunk`로 string 결합 시 Buffer의 기본 인코딩(latin1)이 사용되어 multi-byte UTF-8 문자가 손실됨
+- **해결**: 모든 POST 핸들러(`/pending`, `/dump-html`, `/chat`, `/deep-inspect-result`, `/test-rpc`)에 `req.setEncoding('utf8')` 추가 (v0.5.39)
+- **주의**: Node.js HTTP 서버에서 POST body를 문자열로 수집할 때는 반드시 `req.setEncoding('utf8')`을 호출하거나, Buffer를 배열로 모은 후 `Buffer.concat().toString('utf8')`로 변환해야 함
+
 ### [2026-04-13] [Extension] Observer noise 필터 미작동 — textContent가 아이콘 텍스트를 줄바꿈 없이 합침
 - **증상**: pending description에 `Thought for 1s`, `chevron_right` 등 Material 아이콘명과 UI 노이즈가 그대로 남아있음
 - **원인**: DOM `textContent`는 block 요소 사이에 newline을 삽입하지 않아 `[AI 본문 요약]Thought for 1schevron_right[결행 명령]`처럼 한 줄로 합쳐짐. `cleanLines()`의 줄 단위 noise 필터(`^pattern$`)가 매칭 실패. 또한 `codeText` 추출에는 `cleanLines()`가 아예 미적용