fix: increase contrast between workspace chrome and content

src/system_ui/theme.rs

@@ -1,6 +1,7 @@
 use crate::display_list::Color;
 pub const BG: Color = Color::rgb(255, 255, 255);
-pub const BAR: Color = Color::rgb(245, 245, 245);
+// A visibly separate chrome layer against the warm, near-white content canvas.
+pub const BAR: Color = Color::rgb(230, 233, 237);
 pub const BORDER: Color = Color::rgb(226, 226, 226);
 pub const TEXT: Color = Color::rgb(35, 42, 53);
 pub const MUTED: Color = Color::rgb(103, 114, 130);

src/tabs.rs

@@ -374,7 +374,11 @@ pub fn draw(
             ),
             value: title.into(),
             style: TextStyle::ui(1).scaled(scale),
-            color: crate::system_ui::theme::TEXT,
+            color: if active {
+                crate::system_ui::theme::TEXT
+            } else {
+                crate::system_ui::theme::MUTED
+            },
         });
         list.push(DrawCommand::PopClip);
         if item.navigation.is_none() && item.rect.width >= 44.0 {