feat: Add Playbook Manager, Saved Searches, and Timeline View components

- Implemented PlaybookManager for creating and managing investigation playbooks with templates.
- Added SavedSearches component for managing bookmarked queries and recurring scans.
- Introduced TimelineView for visualizing forensic event timelines with zoomable charts.
- Enhanced backend processing with auto-queued jobs for dataset uploads and improved database concurrency.
- Updated frontend components for better user experience and performance optimizations.
- Documented changes in update log for future reference.

_edit_jobqueue_triage_task.py

@@ -0,0 +1,39 @@
+from pathlib import Path
+p=Path(r'd:/Projects/Dev/ThreatHunt/backend/app/services/job_queue.py')
+t=p.read_text(encoding='utf-8')
+old='''        if hunt_id:
+            job_queue.submit(JobType.HOST_PROFILE, hunt_id=hunt_id)
+            logger.info(f"Triage done for {dataset_id} - chained HOST_PROFILE for hunt {hunt_id}")
+    except Exception as e:
+'''
+new='''        if hunt_id:
+            hp_job = job_queue.submit(JobType.HOST_PROFILE, hunt_id=hunt_id)
+            try:
+                from sqlalchemy import select
+                from app.db.models import ProcessingTask
+                async with async_session_factory() as db:
+                    existing = await db.execute(
+                        select(ProcessingTask.id).where(ProcessingTask.job_id == hp_job.id)
+                    )
+                    if existing.first() is None:
+                        db.add(ProcessingTask(
+                            hunt_id=hunt_id,
+                            dataset_id=dataset_id,
+                            job_id=hp_job.id,
+                            stage="host_profile",
+                            status="queued",
+                            progress=0.0,
+                            message="Queued",
+                        ))
+                        await db.commit()
+            except Exception as persist_err:
+                logger.warning(f"Failed to persist chained HOST_PROFILE task: {persist_err}")
+
+            logger.info(f"Triage done for {dataset_id} - chained HOST_PROFILE for hunt {hunt_id}")
+    except Exception as e:
+'''
+if old not in t:
+    raise SystemExit('triage chain block not found')
+t=t.replace(old,new)
+p.write_text(t,encoding='utf-8')
+print('updated triage chain to persist host_profile task row')