feat: Complete Spanish, French, Portuguese, Chinese localization and add German/Italian support

- Updated all Spanish (es) translation files with comprehensive translations for tracking, AI, family, insights, children, and settings pages
- Updated French (fr), Portuguese (pt), and Chinese (zh) translations to match English structure
- Added German (de) and Italian (it) language support with complete translation files
- Fixed medicine tracker route from /track/medication to /track/medicine
- Updated i18n config to support 7 languages: en, es, fr, pt, zh, de, it
- All tracking pages now fully localized: sleep, feeding, diaper, medicine, activity
- AI assistant interface fully translated with thinking messages and suggested questions
- Family management and insights pages now support all languages

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

maternal-web/locales/zh/auth.json

@@ -1,88 +1,88 @@
 {
   "login": {
-    "title": "Welcome Back",
-    "subtitle": "Sign in to your account",
-    "email": "Email",
-    "password": "Password",
-    "rememberMe": "Remember me",
-    "forgotPassword": "Forgot password?",
-    "submit": "Sign In",
-    "noAccount": "Don't have an account?",
-    "signUp": "Sign up",
-    "or": "Or",
-    "continueWithGoogle": "Continue with Google",
-    "continueWithApple": "Continue with Apple",
+    "title": "欢迎回来",
+    "subtitle": "登录您的账户",
+    "email": "邮箱",
+    "password": "密码",
+    "rememberMe": "记住我",
+    "forgotPassword": "忘记密码？",
+    "submit": "登录",
+    "noAccount": "还没有账户？",
+    "signUp": "注册",
+    "or": "或",
+    "continueWithGoogle": "使用Google继续",
+    "continueWithApple": "使用Apple继续",
     "biometric": {
-      "useFaceId": "Use Face ID",
-      "useTouchId": "Use Touch ID",
-      "useFingerprint": "Use Fingerprint"
+      "useFaceId": "使用面容ID",
+      "useTouchId": "使用触控ID",
+      "useFingerprint": "使用指纹"
     }
   },
   "signup": {
-    "title": "Create Account",
-    "subtitle": "Join Maternal today",
-    "name": "Full Name",
-    "email": "Email",
-    "password": "Password",
-    "confirmPassword": "Confirm Password",
-    "agreeToTerms": "I agree to the {{termsLink}} and {{privacyLink}}",
-    "termsOfService": "Terms of Service",
-    "privacyPolicy": "Privacy Policy",
-    "submit": "Create Account",
-    "hasAccount": "Already have an account?",
-    "signIn": "Sign in",
-    "or": "Or",
-    "continueWithGoogle": "Continue with Google",
-    "continueWithApple": "Continue with Apple"
+    "title": "创建账户",
+    "subtitle": "立即加入Maternal",
+    "name": "全名",
+    "email": "邮箱",
+    "password": "密码",
+    "confirmPassword": "确认密码",
+    "agreeToTerms": "我同意{{termsLink}}和{{privacyLink}}",
+    "termsOfService": "服务条款",
+    "privacyPolicy": "隐私政策",
+    "submit": "创建账户",
+    "hasAccount": "已有账户？",
+    "signIn": "登录",
+    "or": "或",
+    "continueWithGoogle": "使用Google继续",
+    "continueWithApple": "使用Apple继续"
   },
   "forgotPassword": {
-    "title": "Reset Password",
-    "subtitle": "Enter your email to receive a reset link",
-    "email": "Email",
-    "submit": "Send Reset Link",
-    "backToLogin": "Back to login",
-    "success": "Reset link sent! Check your email.",
-    "checkEmail": "We've sent a password reset link to {{email}}"
+    "title": "重置密码",
+    "subtitle": "输入您的邮箱以接收重置链接",
+    "email": "邮箱",
+    "submit": "发送重置链接",
+    "backToLogin": "返回登录",
+    "success": "重置链接已发送！请检查您的邮箱。",
+    "checkEmail": "我们已向{{email}}发送了密码重置链接"
   },
   "resetPassword": {
-    "title": "Create New Password",
-    "subtitle": "Enter your new password",
-    "password": "New Password",
-    "confirmPassword": "Confirm Password",
-    "submit": "Reset Password",
-    "success": "Password reset successfully!",
-    "backToLogin": "Back to login"
+    "title": "创建新密码",
+    "subtitle": "输入您的新密码",
+    "password": "新密码",
+    "confirmPassword": "确认密码",
+    "submit": "重置密码",
+    "success": "密码重置成功！",
+    "backToLogin": "返回登录"
   },
   "verification": {
-    "title": "Verify Your Email",
-    "subtitle": "We've sent a verification code to {{email}}",
-    "code": "Verification Code",
-    "submit": "Verify",
-    "resend": "Resend Code",
-    "resendIn": "Resend in {{seconds}}s",
-    "success": "Email verified successfully!",
-    "didNotReceive": "Didn't receive the code?"
+    "title": "验证您的邮箱",
+    "subtitle": "我们已向{{email}}发送了验证码",
+    "code": "验证码",
+    "submit": "验证",
+    "resend": "重新发送验证码",
+    "resendIn": "{{seconds}}秒后重新发送",
+    "success": "邮箱验证成功！",
+    "didNotReceive": "没有收到验证码？"
   },
   "errors": {
-    "invalidEmail": "Please enter a valid email address",
-    "invalidPassword": "Password must be at least 8 characters",
-    "passwordMismatch": "Passwords do not match",
-    "emailRequired": "Email is required",
-    "passwordRequired": "Password is required",
-    "nameRequired": "Name is required",
-    "termsRequired": "You must agree to the terms and privacy policy",
-    "invalidCredentials": "Invalid email or password",
-    "emailExists": "An account with this email already exists",
-    "weakPassword": "Password is too weak. Please use a stronger password.",
-    "networkError": "Network error. Please try again.",
-    "unknownError": "An error occurred. Please try again."
+    "invalidEmail": "请输入有效的邮箱地址",
+    "invalidPassword": "密码必须至少8个字符",
+    "passwordMismatch": "密码不匹配",
+    "emailRequired": "邮箱是必需的",
+    "passwordRequired": "密码是必需的",
+    "nameRequired": "姓名是必需的",
+    "termsRequired": "您必须同意条款和隐私政策",
+    "invalidCredentials": "邮箱或密码无效",
+    "emailExists": "此邮箱已存在账户",
+    "weakPassword": "密码太弱。请使用更强的密码。",
+    "networkError": "网络错误。请重试。",
+    "unknownError": "发生错误。请重试。"
   },
   "passwordRequirements": {
-    "title": "Password must contain:",
-    "minLength": "At least 8 characters",
-    "uppercase": "At least one uppercase letter",
-    "lowercase": "At least one lowercase letter",
-    "number": "At least one number",
-    "special": "At least one special character"
+    "title": "密码必须包含：",
+    "minLength": "至少8个字符",
+    "uppercase": "至少一个大写字母",
+    "lowercase": "至少一个小写字母",
+    "number": "至少一个数字",
+    "special": "至少一个特殊字符"
   }
-}
+}