feat(sub): opt-in dns and sniffer from remote Clash rules (#6868)

Public Mihomo templates ship rules, rule-providers and proxy-groups together
with a dns block those rules depend on (fake-ip ranges, nameserver policy).
Pasting a template inline keeps its dns, but pointing the global routing rules
at its URL dropped it, so URL users had to give up auto-refresh to keep it.

A new switch, subClashRemoteDNS (off by default), also takes the remote dns and
sniffer maps. It is opt-in because a remote dns block decides where clients send
every lookup. A malformed dns or sniffer value is skipped, not the whole template.
The component-test teardown now outlasts AntD Form's 10ms error debounce, which
otherwise fired after jsdom was gone.

frontend/src/generated/schemas.ts

@@ -216,6 +216,9 @@ export const SCHEMAS: Record<string, unknown> = {
       "subClashPath": {
         "type": "string"
       },
+      "subClashRemoteDNS": {
+        "type": "boolean"
+      },
       "subClashRules": {
         "type": "string"
       },
@@ -636,6 +639,7 @@ export const SCHEMAS: Record<string, unknown> = {
       "subClashEnable",
       "subClashEnableRouting",
       "subClashPath",
+      "subClashRemoteDNS",
       "subClashRules",
       "subClashURI",
       "subClashUserAgentRegex",
@@ -992,6 +996,9 @@ export const SCHEMAS: Record<string, unknown> = {
       "subClashPath": {
         "type": "string"
       },
+      "subClashRemoteDNS": {
+        "type": "boolean"
+      },
       "subClashRules": {
         "type": "string"
       },
@@ -1420,6 +1427,7 @@ export const SCHEMAS: Record<string, unknown> = {
       "subClashEnable",
       "subClashEnableRouting",
       "subClashPath",
+      "subClashRemoteDNS",
       "subClashRules",
       "subClashURI",
       "subClashUserAgentRegex",