fix diff staying blank

src/app.rs

@@ -439,7 +439,7 @@ impl App {
                 }
             };
 
-            self.update();
+            self.update_diff();
         }
     }
 

src/components/diff.rs

@@ -39,6 +39,7 @@ impl DiffComponent {
     pub fn clear(&mut self) {
         self.current.0.clear();
         self.diff = Diff::default();
+        self.current_hash = 0;
     }
     ///
     pub fn update(