fix(ui): keep DSETTINGS tabs on a single tab strip

Replace the wrapping button row with a real single-row tab strip (tab-shaped buttons + divider, matching style-manager editor shell). - Remove Row::wrap() so Selection Cycling can't spill to row 2; clip overflow - Active tab uses primary.strong, inactive weak/strong on hover, top-only radius - Tighten to size 11 / padding [4,8], spacing 2 - Widen Drafting Settings modal 700x480 -> 780x500 to fit 7 tabs

src/app/view/modal.rs

@@ -292,8 +292,8 @@ impl OpenCADStudio {
                 let confirm = self.drafting_settings_close_confirm;
                 sized_flow(
                     ex,
-                    700,
-                    480,
+                    780,
+                    500,
                     |flow| {
                         if let Some(state) = state {
                             crate::ui::window::drafting_settings::view_window(