added timer view

pages/popup/src/Timer.tsx

@@ -0,0 +1,65 @@
+import { useStorage } from '@extension/shared';
+import { themeStorage } from '@extension/storage';
+import ThemeSwitcher from './components/ThemeSwitcher';
+
+interface TimerProps {
+  onBack: () => void;
+}
+
+const Timer = ({ onBack }: TimerProps) => {
+  const theme = useStorage(themeStorage);
+  const isLight = theme === 'light';
+
+  return (
+    <div className={`App size-full overflow-hidden p-2 transition-colors ${
+      isLight ? 'bg-[#CDE8F6]' : 'bg-[#364E68]'
+    }`}>
+      <ThemeSwitcher />
+
+      {/* Box Wrapper */}
+      <div className={`mx-8 my-9 rounded-xl p-4 shadow-lg shadow-black/20 ${
+        isLight ? 'bg-[#F8FAFC]' : 'bg-[#27374D]'
+      }`}>
+        <div className="flex flex-col items-center justify-between">
+          <h1 className={`text-4xl font-bold italic ${
+            isLight ? 'text-gray-900' : 'text-white'
+          }`}>
+            Focus Time
+          </h1>
+
+          {/* Timer Circle */}
+          <div className="my-9 relative flex size-64 items-center justify-center">
+            <div className="absolute size-full rounded-full border-8 border-[#91C8E4] opacity-30" />
+            <div className="text-7xl font-bold">
+              00:00
+            </div>
+          </div>
+
+          {/* Lotus Icons */}
+          <div className="flex gap-2">
+            {'🪷'.repeat(6).split('').map((lotus, index) => (
+              <span key={index} role="img" aria-label="lotus" className="text-3xl">
+                {lotus}
+              </span>
+            ))}
+          </div>
+        </div>
+      </div>
+
+      {/* Back Button - Outside the white box */}
+      <div className="mt-4 flex justify-center">
+        <button
+          onClick={onBack}
+          className={`rounded-full px-8 py-2 text-xl font-bold shadow-lg shadow-black/20 transition-colors ${
+            isLight 
+              ? 'bg-[#39A2DB] hover:bg-[#769FCD] text-[#1E1E1E]' 
+              : 'bg-[#91C8E4] hover:bg-[#B9D7EA] text-[#F8FAFC]'
+          }`}>
+          Back
+        </button>
+      </div>
+    </div>
+  );
+};
+
+export default Timer;