fix: unnecessary curve overwriting

lact-gui/src/app/pages/oc_page.rs

@@ -265,7 +265,9 @@ impl OcPage {
             config.apply_clocks_command(&command);
         }
 
-        config.gpu_vf_curve = self.vf_curve_editor.model().get_configured_curve();
+        if !self.vf_curve_editor.model().is_empty() {
+            config.gpu_vf_curve = self.vf_curve_editor.model().get_configured_curve();
+        }
     }
 
     pub fn get_enabled_power_states(&self) -> IndexMap<PowerLevelKind, Vec<u8>> {

lact-gui/src/app/pages/oc_page/vf_curve.rs

@@ -642,6 +642,10 @@ impl VfCurveEditor {
         (cmp::min(start, end), cmp::max(end, start))
     }
 
+    pub fn is_empty(&self) -> bool {
+        self.points.borrow().is_empty()
+    }
+
     pub fn get_configured_curve(&self) -> IndexMap<u8, config::CurvePoint> {
         if !self.allow_editing.value() {
             return IndexMap::new();