feat: add profile image to employee

src/app/(main)/profile/page.tsx

@@ -2,7 +2,7 @@
 
 import React, { useState, useEffect } from 'react';
 import { useRouter } from 'next/navigation';
-import { UserCircle, Mail, Briefcase, Calendar, Lock, Shield, CheckCircle, XCircle, AlertCircle, Phone, Plus, Pencil, Trash2, X, Save, GraduationCap, MapPin } from 'lucide-react';
+import { UserCircle, Mail, Briefcase, Calendar, Lock, Shield, CheckCircle, XCircle, AlertCircle, Phone, Plus, Pencil, Trash2, X, Save, GraduationCap, MapPin, Camera, Loader2 } from 'lucide-react';
 import employeeService from '@/services/employeeService';
 import type { ApiResponse, Employee, DispatchHistory, EmergencyContact } from '@/types';
 
@@ -266,9 +266,34 @@ export default function ProfilePage() {
         {/* Profile Card */}
         <div className="bg-surface border border-border rounded-2xl p-6 shadow-soft">
           <div className="flex items-start gap-6">
-            {/* Avatar */}
-            <div className="w-24 h-24 rounded-full bg-gradient-to-br from-primary to-purple-400 flex items-center justify-center text-white text-3xl font-bold shadow-lg shadow-primary/20 flex-shrink-0">
-              {formatInitial(employee.name)}
+            {/* Avatar with upload */}
+            <div className="relative flex-shrink-0 group">
+              {employee.profileImage ? (
+                <img src={employee.profileImage} alt={employee.name}
+                  className="w-24 h-24 rounded-full object-cover border-4 border-white shadow-lg" />
+              ) : (
+                <div className="w-24 h-24 rounded-full bg-gradient-to-br from-primary to-purple-400 flex items-center justify-center text-white text-3xl font-bold shadow-lg shadow-primary/20">
+                  {formatInitial(employee.name)}
+                </div>
+              )}
+              <label className="absolute inset-0 rounded-full bg-black/0 group-hover:bg-black/40 transition-all flex items-center justify-center cursor-pointer">
+                <Camera className="w-6 h-6 text-white opacity-0 group-hover:opacity-100 transition-opacity" />
+                <input type="file" accept="image/*" className="hidden" onChange={async (e) => {
+                  const file = e.target.files?.[0];
+                  if (!file) return;
+                  const form = new FormData();
+                  form.append('file', file);
+                  try {
+                    const uploadRes = await fetch('/api/v1/files/upload', { method: 'POST', body: form });
+                    const uploadData = await uploadRes.json();
+                    if (uploadData.success) {
+                      await employeeService.updateProfileImage(employee.empId, uploadData.data);
+                      const empRes = await employeeService.getMe();
+                      if (empRes.success && empRes.data) setEmployee(empRes.data as EmployeeWithId);
+                    }
+                  } catch { alert('이미지 업로드에 실패했습니다.'); }
+                }} />
+              </label>
             </div>
 
             {/* Info Grid */}