fix(bridge): stall-based approval detection + known issues from deep debugging

- IDLE→stall detection: RUNNING+delta=0 for 6 polls (30s)
- lastModifiedTime-based thinking filter (partial)
- ResolveOutstandingSteps confirmed CANCELS steps (removed)
- HandleCascadeUserInteraction always socket hang up (removed)
- VS Code accept commands: silent success, no effect
- Hybrid approval: focus+all commands sequential, no break
- logToFile: console.log backup added
- Known issues: 4 critical findings documented
- better-antigravity reference added for future research

docs/devlog/2026-03-08.md

@@ -13,3 +13,4 @@
 | 9 | 07:50 | SDK EventMonitor 제거 — ERR_CONNECTION_REFUSED 원인 차단 (-404 lines) | `f6ae9c8` | ✅ |
 | 10 | 08:00 | GetCascadeTrajectorySteps 완전 제거 + stall-based WAITING 감지 | `9b9c9c7` | ✅ |
 | 11 | 08:10 | Stall 감지 calibration + VS Code 명령어 기반 승인 핸들러 | `f1f9a0b` | 🔧 |
+| 12 | 11:30~14:35 | 승인 로직 정밀 디버깅: IDLE→stall 전환, lastModifiedTime 구분, RPC/Commands 전수 테스트, ResolveOutstandingSteps cancel 발견 | - | 🔧 |