feat: initial commit with Nuxt 3 student management system

- Add Nuxt 3 + Prisma + SQLite full-stack setup
- Add student CRUD API with batch import/export
- Add stats dashboard with gender/class distribution
- Add target community settings feature
- Add Docker deployment support (Dockerfile + docker-compose)
- Add README with development and deployment instructions

server/api/stats/index.get.ts

@@ -0,0 +1,87 @@
+import { prisma, defaultCommunities } from '~/server/utils/prisma'
+
+export default defineEventHandler(async (event) => {
+  const students = await prisma.student.findMany()
+  
+  // 获取设置的目标小区
+  const settings = await prisma.settings.findMany({
+    where: { key: 'targetCommunities' }
+  })
+  const targetCommunities = settings.length > 0 
+    ? JSON.parse(settings[0].value) 
+    : defaultCommunities
+  
+  // 基础统计
+  const total = students.length
+  const genderStats = {
+    male: students.filter(s => s.gender === '男').length,
+    female: students.filter(s => s.gender === '女').length
+  }
+  
+  // 班级统计
+  const classStats: Record<string, { count: number; male: number; female: number }> = {}
+  students.forEach(s => {
+    if (!classStats[s.className]) {
+      classStats[s.className] = { count: 0, male: 0, female: 0 }
+    }
+    classStats[s.className].count++
+    if (s.gender === '男') classStats[s.className].male++
+    else if (s.gender === '女') classStats[s.className].female++
+  })
+  
+  // 年龄段统计
+  const currentYear = new Date().getFullYear()
+  const ageGroups = {
+    '3岁以下': 0,
+    '3-4岁': 0,
+    '4-5岁': 0,
+    '5-6岁': 0,
+    '6岁以上': 0
+  }
+  students.forEach(s => {
+    if (!s.birthday) return
+    const birthYear = parseInt(s.birthday.substring(0, 4))
+    if (isNaN(birthYear)) return
+    const age = currentYear - birthYear
+    if (age < 3) ageGroups['3岁以下']++
+    else if (age < 4) ageGroups['3-4岁']++
+    else if (age < 5) ageGroups['4-5岁']++
+    else if (age <= 6) ageGroups['5-6岁']++
+    else ageGroups['6岁以上']++
+  })
+  
+  // 目标小区统计
+  const addressStats: Record<string, { count: number; male: number; female: number }> = {}
+  targetCommunities.forEach(name => {
+    addressStats[name] = { count: 0, male: 0, female: 0 }
+  })
+  students.forEach(s => {
+    if (!s.address) return
+    targetCommunities.forEach(community => {
+      if (s.address.includes(community)) {
+        addressStats[community].count++
+        if (s.gender === '男') addressStats[community].male++
+        else if (s.gender === '女') addressStats[community].female++
+      }
+    })
+  })
+  
+  const filteredAddressStats = Object.entries(addressStats)
+    .filter(([_, v]) => v.count > 0)
+    .map(([name, v]) => ({ name, ...v }))
+    .sort((a, b) => b.count - a.count)
+  
+  const targetCommunityTotal = filteredAddressStats.reduce((sum, s) => sum + s.count, 0)
+  
+  return {
+    total,
+    genderStats,
+    classStats: Object.entries(classStats).map(([name, v]) => ({ name, ...v })),
+    ageGroups,
+    targetCommunities,
+    addressStats: filteredAddressStats,
+    targetCommunityTotal,
+    targetCommunityMale: filteredAddressStats.reduce((sum, s) => sum + s.male, 0),
+    targetCommunityFemale: filteredAddressStats.reduce((sum, s) => sum + s.female, 0)
+  }
+})