1. tuned arrow mesh drawing

2. centralixzed arrow config in layout.py
3. seperate mesh render and display resolution to speed up (~40 fps)

examples/gui/__init__.py

@@ -2,23 +2,35 @@
 
 from .dashboard import FingerDashboardWindow, run_dashboard
 from .layout import (
-    DashboardLayout,
-    LAYOUT,
+    LOG_CONFIG,
     LOG_PANEL,
+    LAYOUT,
+    MESH_CONTACT_ARROW,
+    MESH_LIGHTING,
     PANEL_SETUP,
     TOP_ROW,
+    DashboardLayout,
+    LogConfig,
+    MeshLighting,
     PanelRow,
     PanelSetup,
     PanelSlot,
     top_row_splitter_sizes,
     top_row_slot_index,
 )
+from viz.contact_arrow import ContactArrowStyle
 
 __all__ = [
     "DashboardLayout",
     "FingerDashboardWindow",
     "LAYOUT",
+    "LOG_CONFIG",
     "LOG_PANEL",
+    "LogConfig",
+    "MESH_CONTACT_ARROW",
+    "MESH_LIGHTING",
+    "ContactArrowStyle",
+    "MeshLighting",
     "PANEL_SETUP",
     "TOP_ROW",
     "PanelRow",