feat: the list runs to the plate's bottom edge

Rows were clipped a padding short of the bottom, leaving an empty band
under a scrolled list. The viewport now reaches the plate's face edge,
where the bottom roll begins, and the scroll extent carries that padding
instead, so scrolled to the end the last row still rests clear of the edge.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

 src/main.rs | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 588c151..ed32624 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -428,12 +428,15 @@ impl ListApp {
         self.needs_rebuild = true;
     }
 
+    /// Where rows show: from under the input down to the plate's edge — the
+    /// face's, where the bottom roll begins — so a scrolled list runs to the
+    /// edge rather than stopping a padding short of it.
     fn list_viewport(&self, m: &Metrics) -> Rect {
         Rect {
             x: 0.0,
             y: m.list_top,
             width: self.width as f32,
-            height: (self.height as f32 - m.list_top - m.pad).max(0.0),
+            height: (self.height as f32 - m.list_top - cce_ui::layout::bevel_width()).max(0.0),
         }
     }
 
@@ -456,8 +459,11 @@ impl ListApp {
         }
     }
 
+    /// Scrolled to the end, the last row rests a padding clear of the edge,
+    /// as it would if the viewport stopped there.
     fn max_scroll(&self, m: &Metrics) -> f32 {
-        (self.row_count() as f32 * ROW_H - self.list_viewport(m).height).max(0.0)
+        let content = self.row_count() as f32 * ROW_H + cce_ui::layout::root_plate_padding();
+        (content - self.list_viewport(m).height).max(0.0)
     }
 
     fn clamp_scroll(&mut self) {
@@ -686,7 +692,7 @@ impl Application for ListApp {
         cce_ui::scene::painter::paint_root_into(&self.ui_context, &self.input_box, &mut pc);
 
         // The rows, clipped to the viewport so a scrolled list never bleeds
-        // into the input or the plate's bottom roll.
+        // into the input or onto the plate's bottom roll.
         let (family, font_size) = cce_ui::layout::list_font_parsed();
         let vp = self.list_viewport(&m);
         let items = self.rows();