feat(ccw): add session manager tool with auto workspace detection

- Add session_manager tool for workflow session lifecycle management
- Add ccw session CLI command with subcommands:
  - list, init, status, task, stats, delete, read, write, update, archive, mkdir
- Implement auto workspace detection (traverse up to find .workflow)
- Implement auto session location detection (active, archived, lite-plan, lite-fix)
- Add dashboard notifications for tool executions via WebSocket
- Add granular event types (SESSION_CREATED, TASK_UPDATED, etc.)
- Add status_history auto-tracking for task status changes
- Update workflow session commands to document ccw session usage

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/commands/workflow/session/resume.md

@@ -58,4 +58,33 @@ Session WFS-user-auth resumed
 - Paused at: 2025-09-15T14:30:00Z
 - Resumed at: 2025-09-15T15:45:00Z
 - Ready for: /workflow:execute
-```
+```
+## session_manager Tool Alternative
+
+Use `ccw tool exec session_manager` for session resume:
+
+### Update Session Status
+```bash
+# Update status to active
+ccw tool exec session_manager '{
+  "operation": "update",
+  "session_id": "WFS-xxx",
+  "content_type": "session",
+  "content": {
+    "status": "active",
+    "resumed_at": "2025-12-10T08:00:00Z"
+  }
+}'
+```
+
+### Read Session Status
+```bash
+ccw tool exec session_manager '{"operation":"read","session_id":"WFS-xxx","content_type":"session"}'
+```
+
+### Operation Reference
+| Old Pattern | session_manager |
+|------------|-----------------|
+| `jq -r '.status' session.json` | `{"operation":"read","content_type":"session"}` |
+| `jq '.status = "active"' ... > temp.json && mv` | `{"operation":"update","content":{"status":"active"}}` |
+| `jq '.resumed_at = "..."'` | `{"operation":"update","content":{"resumed_at":"..."}}` |