fix(proxy): validate user-entered URLs via isValidUrl

Delay test inputs now reject non-http(s) URLs with a warning toast and
fall back to the default URL instead of erroring every node in the
core. Subscription import and profile card host parsing reuse the same
validator, fixing bare-domain URLs shown as local files and
credential-bearing URLs leaking into the card.

src/components/proxy/proxy-group-tools.tsx

@@ -17,6 +17,8 @@ import { useTranslation } from 'react-i18next'
 
 import { useVerge } from '@/hooks/use-verge'
 import delayManager from '@/services/delay'
+import { showNotice } from '@/services/notice-service'
+import { isValidUrl } from '@/utils/network'
 
 import { BaseSearchBox, type SearchState } from '../base'
 
@@ -174,6 +176,10 @@ export const ProxyGroupTools = memo(function ProxyGroupTools(props: Props) {
           if (testUrl?.trim() && textState !== 'filter') {
             onHeadState({ textState: 'url' })
           }
+          if (testUrl?.trim() && !isValidUrl(testUrl)) {
+            showNotice.warning('proxies.feedback.warnings.invalidTestUrl')
+            return
+          }
           onCheckDelay()
         }}
       >

src/components/proxy/proxy-head.tsx

@@ -18,7 +18,9 @@ import { useTranslation } from 'react-i18next'
 import { BaseSearchBox } from '@/components/base'
 import { useVerge } from '@/hooks/use-verge'
 import delayManager from '@/services/delay'
+import { showNotice } from '@/services/notice-service'
 import { debugLog } from '@/utils/debug'
+import { isValidUrl } from '@/utils/network'
 
 import type { ProxySortType } from './use-filter-sort'
 import type { HeadState } from './use-head-state'
@@ -95,6 +97,10 @@ export const ProxyHead = ({
             debugLog(`[ProxyHead] 使用自定义测试URL: ${testUrl}`)
             onHeadState({ textState: 'url' })
           }
+          if (testUrl?.trim() && !isValidUrl(testUrl)) {
+            showNotice.warning('proxies.feedback.warnings.invalidTestUrl')
+            return
+          }
           onCheckDelay()
         }}
       >