refactor(web): update API service, view script and add tests

Frontend:
- services/api.js: update API service client
- views/scripts/EmployeeManagementView.js: update employee management view script
- tests/api-request.test.mjs: update API request tests

Scripts:
- create_employee.sh: add employee creation script

web/src/views/scripts/EmployeeManagementView.js

@@ -100,6 +100,46 @@ function normalizeNullableText(value) {
   return text || null
 }
 
+function isValidEmail(value) {
+  const normalized = normalizeText(value)
+  if (!normalized) {
+    return false
+  }
+
+  return /^[^\s@]+@[^\s@]+\.[^\s@]+$/u.test(normalized)
+}
+
+function isValidIsoDate(value) {
+  const normalized = normalizeText(value)
+  if (!normalized) {
+    return false
+  }
+
+  if (!/^\d{4}-\d{2}-\d{2}$/u.test(normalized)) {
+    return false
+  }
+
+  const [yearText, monthText, dayText] = normalized.split('-')
+  const year = Number.parseInt(yearText, 10)
+  const month = Number.parseInt(monthText, 10)
+  const day = Number.parseInt(dayText, 10)
+
+  if ([year, month, day].some((item) => Number.isNaN(item))) {
+    return false
+  }
+
+  const parsed = new Date(year, month - 1, day)
+  if (Number.isNaN(parsed.getTime())) {
+    return false
+  }
+
+  return (
+    parsed.getFullYear() === year &&
+    parsed.getMonth() === month - 1 &&
+    parsed.getDate() === day
+  )
+}
+
 function sameValues(left, right) {
   if (left.length !== right.length) {
     return false
@@ -547,6 +587,11 @@ export default {
         return
       }
 
+      if (!isValidEmail(employeeForm.value.email)) {
+        toast('请输入有效的邮箱地址。')
+        return
+      }
+
       if (!normalizeText(employeeForm.value.position)) {
         toast('岗位不能为空。')
         return
@@ -557,6 +602,18 @@ export default {
         return
       }
 
+      const birthDate = normalizeNullableText(employeeForm.value.birthDate)
+      if (birthDate && !isValidIsoDate(birthDate)) {
+        toast('出生日期格式不正确，请使用 YYYY-MM-DD。')
+        return
+      }
+
+      const joinDate = normalizeNullableText(employeeForm.value.joinDate)
+      if (joinDate && !isValidIsoDate(joinDate)) {
+        toast('入职日期格式不正确，请使用 YYYY-MM-DD。')
+        return
+      }
+
       if (normalizeText(employeeForm.value.password) && normalizeText(employeeForm.value.password).length < 5) {
         toast('员工密码至少需要 5 位。')
         return