优化 TitleBar 和 Index 页面

common_ui/src/main/ets/utils/Calc.ets

@@ -1,3 +0,0 @@
-export function add(a:number, b:number) {
-    return a + b;
-}

common_ui/src/main/ets/utils/CommonRes.ets

@@ -0,0 +1,17 @@
+
+export class CommonRes {
+  private constructor() {
+  }
+
+  public static getIconRefresh(): Resource {
+    return $r("app.media.ic_refresh");
+  }
+
+  public static getIconBack(): Resource {
+    return $r("app.media.ic_chevron_left");
+  }
+
+  public static getIconClose(): Resource {
+    return $r("app.media.ic_close");
+  }
+}