Set clip_on=False on geom_text artists in PolarAxes

post_setup_ax iterates ax.texts after the facet creates them and disables
clipping, allowing spoke labels placed just beyond the outermost bar tip
to render past the axes bounding box.

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

Author: iangow

plotnine/coords/coord_radial.py

@@ -258,3 +258,7 @@ def post_setup_ax(self, ax: Axes) -> None:
         """Apply theta label pad after facet has set tick positions and padding."""
         if self.theta_labels or self.end is not None:
             ax.tick_params(axis="x", pad=self.theta_label_pad)
+        # Allow geom_text labels to extend past the polar axes bounding box
+        # (e.g. spoke labels placed just beyond the outermost bar tip).
+        for text in ax.texts:
+            text.set_clip_on(False)