add accent color and surface preferences to settings

crates/settings/src/lib.rs

@@ -318,6 +318,34 @@ impl AppSettings {
         self.apply_theme(Some(window), cx);
     }
 
+    /// Set the accent color override and re-resolve the theme
+    pub fn apply_accent(
+        &mut self,
+        selection: AccentSelection,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.inner.update(cx, |this, cx| {
+            this.accent_selection = selection;
+            cx.notify();
+        });
+        self.apply_theme(Some(window), cx);
+    }
+
+    /// Set the surface treatment preference
+    pub fn apply_surface(
+        &mut self,
+        preference: SurfacePreference,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.inner.update(cx, |this, cx| {
+            this.surface_preference = preference;
+            cx.notify();
+        });
+        self.apply_theme(Some(window), cx);
+    }
+
     /// Apply theme
     pub fn apply_theme(&mut self, window: Option<&mut Window>, cx: &mut Context<Self>) {
         let (selection, accent, surface, appearance) = {