fix(extension): Retry auto-approve 흐름 복구 + Observer 형제 탐색 + thinking 필터링 (v0.5.79)

- WS response 파일에 _from_ws 마커 추가하여 processResponseFile 삭제 방지
- extractContextFromNearby에 sibling 탐색 추가 (AG Native DOM 구조 대응)
- thinking 블록 (max-h-[200px]) 필터링으로 내부 사고 릴레이 차단
- DOM 탐색 depth 5→10 확대 + pre.font-mono 우선 탐색
- 사용자 메시지 셀렉터 (.select-text.rounded-lg) 추가

extension/scratch/find_user_msg.js

@@ -0,0 +1,29 @@
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+const d = JSON.parse(fs.readFileSync(
+  path.join(os.homedir(), '.gemini', 'antigravity', 'bridge', 'dump_html.json'), 'utf-8'
+));
+const s = JSON.stringify(d.body);
+
+console.log('title:', d.quickInfo.title);
+console.log('Has id=conversation:', s.includes('"id":"conversation"'));
+console.log('Has agent-side-panel:', s.includes('antigravity-agent-side-panel'));
+
+// Find message-block patterns
+const mb = [...s.matchAll(/message-block/g)];
+console.log('message-block occurrences:', mb.length);
+
+// Find user-related class patterns
+const userPatterns = ['user-color', 'user-background', 'user-message', 'user-query', 'user-input', 'human'];
+userPatterns.forEach(p => {
+  const cnt = [...s.matchAll(new RegExp(p, 'gi'))].length;
+  if (cnt > 0) console.log(`  ${p}: ${cnt} occurrences`);
+});
+
+// Show all unique classes that include 'message' or 'chat' or 'conversation'
+const clsMatches = [...s.matchAll(/"cls":"([^"]*(?:message|chat|conversation|query|user|human)[^"]*)"/gi)];
+console.log('\nClasses with message/chat/conversation/user/human:');
+const uniq = [...new Set(clsMatches.map(m => m[1]))];
+uniq.forEach(c => console.log('  ', c.substring(0, 120)));