feat: DSL 磁力聚合 — 搜索/解析/预览/投递 + cilisousuo 源 + 中英双语 + Docker 部署

app/composables/useHealth.ts

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+import type { HealthResponse } from '~/types/api'
+
+/** 全局健康状态：Mongo / webtorrent / 客户端在线数，用于顶栏状态灯与页面提示 */
+export function useHealth() {
+  return useState<HealthResponse | null>('health', () => null)
+}
+
+export async function refreshHealth() {
+  const state = useHealth()
+  try {
+    state.value = await $fetch<HealthResponse>('/api/health')
+  } catch {
+    state.value = null
+  }
+  return state.value
+}

app/composables/useToast.ts

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+export type ToastKind = 'info' | 'ok' | 'err' | 'warn'
+
+export interface Toast {
+  id: number
+  kind: ToastKind
+  title: string
+  detail?: string
+}
+
+let seq = 0
+
+export function useToasts() {
+  return useState<Toast[]>('toasts', () => [])
+}
+
+export function dismissToast(id: number) {
+  const toasts = useToasts()
+  toasts.value = toasts.value.filter((t) => t.id !== id)
+}
+
+export function pushToast(kind: ToastKind, title: string, detail?: string, ttl = 5200) {
+  const toasts = useToasts()
+  const id = ++seq
+  toasts.value = [...toasts.value, { id, kind, title, detail }]
+  if (import.meta.client && ttl > 0) {
+    setTimeout(() => dismissToast(id), ttl)
+  }
+  return id
+}
+
+/** 从 $fetch 抛出的错误里抠出可读信息 */
+export function errorMessage(err: unknown): string {
+  const e = err as { statusMessage?: string; data?: { statusMessage?: string; message?: string }; message?: string }
+  return (
+    e?.data?.statusMessage ||
+    e?.statusMessage ||
+    e?.data?.message ||
+    e?.message ||
+    '请求失败'
+  )
+}