fix: move themeColor from metadata to viewport export

Resolves Next.js deprecation warnings about unsupported metadata themeColor.

v1.43.1

package.json

@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.43.0",
+  "version": "1.43.1",
   "description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
   "main": "index.js",
   "scripts": {

src/app/layout.tsx

@@ -10,15 +10,15 @@ export const viewport: Viewport = {
   initialScale: 1,
   maximumScale: 1,
   userScalable: false,
+  themeColor: [
+    { media: '(prefers-color-scheme: light)', color: '#ffffff' },
+    { media: '(prefers-color-scheme: dark)', color: '#111111' },
+  ],
 };
 
 export const metadata: Metadata = {
   title: 'My Weekly To Do List',
   description: 'A simple, designy to-do app.',
-  themeColor: [
-    { media: '(prefers-color-scheme: light)', color: '#ffffff' },
-    { media: '(prefers-color-scheme: dark)', color: '#111111' },
-  ],
   appleWebApp: {
     capable: true,
     statusBarStyle: 'default',