CODEX_SESSION_SCANNER was incorrectly auto-resuming old sessions because
session files persist after Codex exits. Fixed by:
1. Only matching sessions created AFTER hapi startup (reject if
sessionTimestamp < referenceTimestampMs)
2. Snapshot resumeSessionId at startup so scanner callbacks don't
affect codexLocal's launch parameters
3. Updated session timestamp test to verify boundary conditions
Create BaseSessionScanner abstract class to consolidate common session
scanning logic shared between Claude and Codex session scanners. Both
scanners now inherit from this base, reducing duplication and providing
consistent patterns for file watching, event processing, and state
management.
Reorganized runCodex.ts to improve maintainability by extracting:
- CodexSession class for session lifecycle management
- CodexLocalLauncher and CodexRemoteLauncher for mode-specific initialization
- CodexEventConverter for MCP message handling and UI buffer updates
- CodexSessionScanner for resume file discovery
- emitReadyIfIdle utility for ready event emission
Added codexSessionId field to metadata schema for session tracking.
Updated UI components to work with refactored architecture.
weishu