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frontend/composables/useToast.ts

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+/**
+ * Bootstrap Toast Composable
+ * 전역 토스트 메시지 관리
+ */
+interface ToastMessage {
+  id: number
+  type: 'success' | 'error' | 'warning' | 'info'
+  title?: string
+  message: string
+  duration?: number
+}
+
+const toasts = ref<ToastMessage[]>([])
+let toastId = 0
+
+export function useToast() {
+  function show(message: string, type: ToastMessage['type'] = 'info', title?: string, duration = 3000) {
+    const id = ++toastId
+    toasts.value.push({ id, type, title, message, duration })
+    
+    if (duration > 0) {
+      setTimeout(() => {
+        remove(id)
+      }, duration)
+    }
+  }
+  
+  function success(message: string, title?: string, duration = 3000) {
+    show(message, 'success', title || '성공', duration)
+  }
+  
+  function error(message: string, title?: string, duration = 5000) {
+    show(message, 'error', title || '오류', duration)
+  }
+  
+  function warning(message: string, title?: string, duration = 4000) {
+    show(message, 'warning', title || '경고', duration)
+  }
+  
+  function info(message: string, title?: string, duration = 3000) {
+    show(message, 'info', title || '알림', duration)
+  }
+  
+  function remove(id: number) {
+    const idx = toasts.value.findIndex(t => t.id === id)
+    if (idx > -1) {
+      toasts.value.splice(idx, 1)
+    }
+  }
+  
+  return {
+    toasts,
+    show,
+    success,
+    error,
+    warning,
+    info,
+    remove
+  }
+}