feat(comp): implement CodeField component with 300ms debounce validation and F2 popup support

src/frontend/src/components/fields/CodeField.vue

@@ -0,0 +1,77 @@
+<!-- Typed Field Component Layer: CodeField (WBS-COMP-2.4) -->
+<template>
+  <div class="typed-code-field flex flex-col gap-1 w-full">
+    <div class="flex justify-between items-center text-xs">
+      <label class="font-bold text-slate-800">
+        {{ label }} <span v-if="required" class="text-rose-600">*</span>
+      </label>
+      <span v-if="isValidating" class="text-[11px] text-blue-600 font-medium">⏳ 중복 검사 중...</span>
+      <span v-else-if="validationStatus === 'VALID'" class="text-[11px] text-emerald-700 font-bold">✓ 사용 가능한 코드</span>
+      <span v-else-if="validationStatus === 'INVALID'" class="text-[11px] text-rose-600 font-bold">🚨 이미 존재하는 코드</span>
+    </div>
+
+    <div class="relative flex items-center">
+      <input
+        type="text"
+        :value="modelValue"
+        :placeholder="placeholder || 'CUST-001'"
+        :readonly="readonly"
+        :disabled="disabled"
+        class="w-full h-9 px-3 pr-16 border border-slate-300 rounded font-mono text-xs text-slate-900 font-bold bg-white placeholder:text-slate-400 focus:ring-2 focus:ring-blue-500 focus:border-blue-500 focus:outline-none disabled:bg-slate-100 disabled:text-slate-500 readonly:bg-slate-50 readonly:text-slate-700 uppercase"
+        @input="handleInput"
+      />
+      <button
+        type="button"
+        class="absolute right-1 top-1 bottom-1 px-2.5 bg-slate-800 hover:bg-slate-700 text-amber-300 font-mono text-[11px] font-bold rounded transition"
+        @click="$emit('openPopup')"
+      >
+        F2
+      </button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue';
+
+const props = defineProps<{
+  label: string;
+  modelValue: string;
+  placeholder?: string;
+  required?: boolean;
+  readonly?: boolean;
+  disabled?: boolean;
+  existingCodes?: string[];
+}>();
+
+const emit = defineEmits(['update:modelValue', 'openPopup']);
+
+const isValidating = ref(false);
+const validationStatus = ref<'NONE' | 'VALID' | 'INVALID'>('NONE');
+let debounceTimer: any = null;
+
+const mockExistingCodes = props.existingCodes || ['CUST-001', 'CUST-002', 'ITEM-001', 'WH-SEOUL-01'];
+
+const handleInput = (e: Event) => {
+  const val = (e.target as HTMLInputElement).value.toUpperCase().trim();
+  emit('update:modelValue', val);
+
+  if (!val) {
+    validationStatus.value = 'NONE';
+    isValidating.value = false;
+    return;
+  }
+
+  isValidating.value = true;
+  if (debounceTimer) clearTimeout(debounceTimer);
+
+  debounceTimer = setTimeout(() => {
+    isValidating.value = false;
+    if (mockExistingCodes.includes(val)) {
+      validationStatus.value = 'INVALID';
+    } else {
+      validationStatus.value = 'VALID';
+    }
+  }, 300);
+};
+</script>