fix(query-tool): lazy-load detail, multi-root trees, timeline UX overhaul

- Tree: render separate ECharts series per wafer-lot root instead of
  overlapping single-data trees
- Lazy loading: resolve builds tree only; detail/timeline load on node
  click to reduce initial resource consumption
- Timeline: group tracks by WORKCENTER_GROUP × LOT ID × Equipment with
  multi-line Y-axis labels (LOT ID + 機台編號)
- Timeline: backend enriches history rows with WORKCENTER_GROUP via
  filter_cache; timeRange derives only from history bars for dynamic
  updates on filter/selection change
- TimelineChart: teleport tooltip to body (fixed positioning) to prevent
  clipping; adaptive chart width scaling; edge-aware boundary detection
- Build script: add reject-history HTML copy; feature flag registered

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

data/modernization_feature_flags.json

@@ -6,6 +6,7 @@
     "/hold-overview": {"content_cutover_enabled": true},
     "/hold-detail": {"content_cutover_enabled": true},
     "/hold-history": {"content_cutover_enabled": true},
+    "/reject-history": {"content_cutover_enabled": false},
     "/resource": {"content_cutover_enabled": true},
     "/resource-history": {"content_cutover_enabled": true},
     "/qc-gate": {"content_cutover_enabled": true},