Added new connection styles

BEdit/AGENTS.md

@@ -60,6 +60,12 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
 - Port removal or reorientation must be rejected when it would invalidate an
   existing connection.
 - Connections reference port IDs, never port names.
+- Graph interaction has separate Pointer and Connect modes. Connections store a
+  `properties.routing` value (`direct`, `angled`, or `spline`); angled routes
+  store absolute scene points in `properties.waypoints`.
+- Connection appearance is configured per port type in
+  `gui/graphics/connection_styles.py`, including color, width, pen style, and
+  source/target arrowheads. Do not scatter those constants through painters.
 - Icon editing uses a fixed 128×128 coordinate space.
 - The visible/selectable component hitbox is calculated from vector elements,
   not from the complete 128×128 icon canvas.