Refactor Mihomo proxy groups component to optimize data handling and prevent rendering issues

- Utilized `untrack` from Svelte to avoid infinite rendering loops during asynchronous operations.
- Improved loading state management by ensuring notifications are handled correctly without causing UI flickering.
- Enhanced data fetching logic for proxy groups, ensuring stable access to test URLs and reducing potential delays in updates.

web/src/lib/components/mihomo/mihomo-proxy-groups.svelte

@@ -53,9 +53,9 @@
 	}
 
 	async function loadProxies() {
-		const a = alias;
+		const a = untrack(() => alias);
 		if (!a) return;
-		const notify = onLoadingChange;
+		const notify = untrack(() => onLoadingChange);
 		proxiesLoading = true;
 		// Иначе $effect подпишется на проп-колбэк: новая fn каждый рендер родителя → бесконечный цикл /proxies
 		untrack(() => notify?.(true));
@@ -115,11 +115,11 @@
 	}
 
 	async function pingOne(name: string) {
-		const a = alias;
+		const a = untrack(() => alias);
 		if (!a) return;
 		testing = name;
 		try {
-			const testUrl = proxiesData?.proxies?.[name]?.testUrl;
+			const testUrl = untrack(() => proxiesData?.proxies?.[name]?.testUrl);
 			await fetchMihomoJson(
 				a,
 				`proxies/${encodeURIComponent(name)}/delay?${delayQuery(testUrl)}`
@@ -133,23 +133,35 @@
 	}
 
 	async function pingGroup(groupName: string) {
-		const a = alias;
+		const a = untrack(() => alias);
 		if (!a) return;
+		// Снимок до await: иначе $effect(delayAllNonce) подпишется на proxiesData и
+		// после loadProxies() перезапустится при том же nonce → бесконечные delay/ping.
+		const snap = untrack(() => {
+			const p = proxiesData?.proxies;
+			const g = p?.[groupName];
+			const names = g?.all ?? [];
+			return {
+				groupTestUrl: g?.testUrl,
+				names,
+				nodeTestUrls: names.map((n) => p?.[n]?.testUrl)
+			};
+		});
 		testingGroup = groupName;
-		const groupTestUrl = proxiesData?.proxies?.[groupName]?.testUrl;
 		try {
 			await fetchMihomoJson(
 				a,
-				`group/${encodeURIComponent(groupName)}/delay?${delayQuery(groupTestUrl)}`
+				`group/${encodeURIComponent(groupName)}/delay?${delayQuery(snap.groupTestUrl)}`
 			);
 			await loadProxies();
 		} catch {
 			try {
-				const g = proxiesData?.proxies?.[groupName];
-				const names = g?.all ?? [];
-				for (const n of names) {
-					const u = proxiesData?.proxies?.[n]?.testUrl;
-					await fetchMihomoJson(a, `proxies/${encodeURIComponent(n)}/delay?${delayQuery(u)}`);
+				for (let i = 0; i < snap.names.length; i++) {
+					const n = snap.names[i]!;
+					await fetchMihomoJson(
+						a,
+						`proxies/${encodeURIComponent(n)}/delay?${delayQuery(snap.nodeTestUrls[i])}`
+					);
 				}
 				await loadProxies();
 			} catch (e) {