Cap command overlay results height at design's 440 px

Design overflow scoping uses maxHeight:440 on the inner results region,
not the whole panel. The previous max_h(540) on the panel capped the
overall card height (header + results + footer) and let the results
expand to fill, which clipped the footer when many sections were
visible.

Now the panel grows to fit content while the results section caps at
440 px and overflows internally — matches the design's
panel-with-scrollable-middle layout exactly.

crates/ely_app/src/shell/chrome/command_overlay.rs

@@ -64,7 +64,6 @@ fn render_panel(
 
     div()
         .w(px(640.0))
-        .max_h(px(540.0))
         .rounded(px(16.0))
         .bg(rgba(PANEL_BG))
         .shadow(panel_shadow())
@@ -163,8 +162,7 @@ fn render_results(
     }
 
     div()
-        .flex_1()
-        .min_h_0()
+        .max_h(px(440.0))
         .py(px(8.0))
         .flex()
         .flex_col()