feat: add data-testid attributes for form elements to improve testability

src/components/sections/contact-section.tsx

@@ -155,6 +155,7 @@ export function ContactSection() {
           message={toastMessage}
           type={toastType}
           onClose={() => setShowToast(false)}
+          data-testid="toast-notification"
         />
       )}
       <div className="absolute inset-0 pointer-events-none">
@@ -271,7 +272,7 @@ export function ContactSection() {
               <h3 className="text-lg font-semibold text-[#1A1A2E] mb-6">发送消息</h3>
               
               {isSubmitted ? (
-                <div className="text-center py-12 flex-1 flex items-center justify-center">
+                <div className="text-center py-12 flex-1 flex items-center justify-center" data-testid="success-message">
                   <div className="w-16 h-16 bg-[#C41E3A] rounded-full flex items-center justify-center mx-auto mb-4 animate-stamp-in">
                     <CheckCircle2 className="w-8 h-8 text-white" />
                   </div>
@@ -286,6 +287,7 @@ export function ContactSection() {
                       id="name" 
                       placeholder="请输入您的姓名" 
                       required 
+                      data-testid="name-input"
                       value={formData.name}
                       onChange={(e) => handleChange('name', e.target.value)}
                       onBlur={(e) => handleBlur('name', e.target.value)}
@@ -297,6 +299,7 @@ export function ContactSection() {
                       type="tel" 
                       placeholder="请输入您的电话" 
                       required 
+                      data-testid="phone-input"
                       value={formData.phone}
                       onChange={(e) => handleChange('phone', e.target.value)}
                       onBlur={(e) => handleBlur('phone', e.target.value)}
@@ -309,6 +312,7 @@ export function ContactSection() {
                     type="email" 
                     placeholder="请输入您的邮箱" 
                     required 
+                    data-testid="email-input"
                     value={formData.email}
                     onChange={(e) => handleChange('email', e.target.value)}
                     onBlur={(e) => handleBlur('email', e.target.value)}
@@ -320,6 +324,7 @@ export function ContactSection() {
                     placeholder="请输入您想咨询的内容" 
                     rows={5}
                     required 
+                    data-testid="message-input"
                     value={formData.message}
                     onChange={(e) => handleChange('message', e.target.value)}
                     onBlur={(e) => handleBlur('message', e.target.value)}
@@ -330,6 +335,7 @@ export function ContactSection() {
                     size="lg"
                     className="w-full group mt-auto min-h-[52px] md:min-h-0"
                     disabled={isSubmitting}
+                    data-testid="submit-button"
                   >
                     {isSubmitting ? (
                       <>

src/components/ui/input.tsx

@@ -4,6 +4,7 @@ import { cn } from "@/lib/utils"
 export interface InputProps extends React.InputHTMLAttributes<HTMLInputElement> {
   label?: string
   error?: string
+  'data-testid'?: string
 }
 
 const Input = React.forwardRef<HTMLInputElement, InputProps>(
@@ -27,6 +28,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
           type={type}
           id={inputId}
           data-slot="input"
+          data-testid={props['data-testid']}
           className={cn(
             "file:text-foreground placeholder:text-[#8C8C8C] selection:bg-[#1C1C1C] selection:text-white h-14 min-h-[56px] w-full min-w-0 rounded-lg border border-[#E5E5E5] bg-[#FAFAFA] px-4 py-3 text-base text-[#1C1C1C] shadow-sm transition-all duration-300 outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 touch-manipulation md:h-12 md:min-h-[44px] md:py-2",
             "focus-visible:border-[#1C1C1C] focus-visible:ring-2 focus-visible:ring-[#1C1C1C]/50 focus-visible:shadow-lg focus-visible:shadow-[#1C1C1C]/20",
@@ -41,7 +43,7 @@ const Input = React.forwardRef<HTMLInputElement, InputProps>(
           {...props}
         />
         {error && (
-          <p id={errorId} className="mt-1 text-sm text-[#C41E3A]" role="alert">
+          <p id={errorId} className="mt-1 text-sm text-[#C41E3A]" role="alert" data-testid="error-message">
             {error}
           </p>
         )}

src/components/ui/textarea.tsx

@@ -4,6 +4,7 @@ import { cn } from "@/lib/utils"
 export interface TextareaProps extends React.TextareaHTMLAttributes<HTMLTextAreaElement> {
   label?: string
   error?: string
+  'data-testid'?: string
 }
 
 const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
@@ -26,6 +27,7 @@ const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
         <textarea
           id={textareaId}
           data-slot="textarea"
+          data-testid={props['data-testid']}
           className={cn(
             "placeholder:text-[#8C8C8C] selection:bg-[#1C1C1C] selection:text-white min-h-[140px] w-full rounded-lg border border-[#E5E5E5] bg-[#FAFAFA] px-4 py-3 text-base text-[#1C1C1C] shadow-sm transition-all duration-300 outline-none disabled:cursor-not-allowed disabled:opacity-50 md:min-h-[80px] md:text-sm md:py-2 resize-none",
             "focus-visible:border-[#1C1C1C] focus-visible:ring-2 focus-visible:ring-[#1C1C1C]/50 focus-visible:shadow-lg focus-visible:shadow-[#1C1C1C]/20",