Add BOSL2 library support and rounded plate edges

- Added BOSL2 include for advanced shape operations
- Added plate_rounding parameter (3mm default)
- Updated plate_base() to use cuboid() with rounded vertical edges
- Re-exported STL with latest model changes

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

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

avocado-nameplate/test-avocado.scad

@@ -1,10 +1,13 @@
 // Avocado Nameplate for Ry
 // A rectangular plate with recessed avocado cross-section and raised text
 
+include <BOSL2/std.scad>
+
 /* [Plate Dimensions] */
 plate_width = 50;       // mm
 plate_height = 85;     // mm
 plate_thickness = 5;    // mm
+plate_rounding = 3;     // mm - radius for rounded edges
 
 /* [Avocado Settings] */
 avocado_recess_depth = 2;   // mm - how deep the avocado is recessed
@@ -136,9 +139,13 @@ module text_recess_3d() {
                  valign = "baseline");
 }
 
-// Base plate
+// Base plate with rounded edges (using BOSL2)
 module plate_base() {
-    cube([plate_width, plate_height, plate_thickness]);
+    // anchor=FRONT+LEFT+BOTTOM positions like cube() (corner at origin)
+    cuboid([plate_width, plate_height, plate_thickness],
+           rounding=plate_rounding,
+           edges="Z",  // Round only vertical edges (sides)
+           anchor=FRONT+LEFT+BOTTOM);
 }
 
 // Keychain hole (for subtracting from plate)