Add Chinese translations for medication management and personal settings

- Introduced new translation files for medication, personal, and weight management in Chinese.
- Updated the main index file to include the new translation modules.
- Enhanced the medication type definitions to include 'ointment'.
- Refactored workout type labels to utilize i18n for better localization support.
- Improved sleep quality descriptions and recommendations with i18n integration.

i18n/zh/common.ts

@@ -0,0 +1,5 @@
+export const dateSelector = {
+  backToToday: '回到今天',
+  cancel: '取消',
+  confirm: '确定',
+};