fix: fix resize and dragging

- AbstractShape: make bounds protected for subclass access
- STriangle: refactor resize logic
- SCircle: refactor resize logic (preserves equal dimensions)
- SText: add reasonable default bounds for hit testing

src/main/java/ovh/gasser/newshapes/shapes/STriangle.java

@@ -18,21 +18,22 @@ public class STriangle extends AbstractShape {
 
     @Override
     public void resize(ResizeHandle handle, int dx, int dy) {
-        Rectangle bounds = getBounds();
         int delta = Math.max(Math.abs(dx), Math.abs(dy));
 
         boolean shrink = switch (handle) {
+            case E -> dx < 0;
+            case W -> dx > 0;
+            case N -> dy > 0;
+            case S -> dy < 0;
             case SE -> (dx < 0 || dy < 0);
             case NW -> (dx > 0 || dy > 0);
-            case NE -> (dx < 0);
-            case SW -> (dx > 0);
-            case E, W -> (dx < 0);
-            case N, S -> (dy < 0);
+            case NE -> (dx < 0 || dy > 0);
+            case SW -> (dx > 0 || dy < 0);
             default -> false;
         };
 
         int sizeChange = shrink ? -delta : delta;
-
+        
         switch (handle) {
             case SE, E, W -> {
                 bounds.width += sizeChange;