♻️ refactor: 优化 Iris Cloud 节点重命名与排序逻辑

- 移除 multiplierValueOf 工具函数及倍率数值转换逻辑
- 简化节点排序规则，移除基于倍率大小的二次排序逻辑
- 保持原有的区域顺序和初始索引顺序进行节点排序

substore/iriscloud-rename.js

@@ -36,6 +36,7 @@ async function operator(proxies) {
     const utils = await loadRenameUtils();
 
     const landingPrefixOf = name => {
+        if (/^(?:US)(?:$|[\s|.-])/i.test(name)) return 'US';
         if (/(?:^|[-\s])SG(?:$|[-\s.])/i.test(name)) return 'SG';
         if (/(?:^|[-\s])TYO(?:$|[-\s])/i.test(name)) return 'JP TYO';
         if (/(?:^|[-\s])JP(?:$|[-\s])/i.test(name)) return 'JP';
@@ -49,10 +50,6 @@ async function operator(proxies) {
         return match ? `${match[1]}X` : '';
     };
 
-    const multiplierValueOf = multiplier => (
-        multiplier ? Number(multiplier.replace(/X$/i, '')) : Number.NEGATIVE_INFINITY
-    );
-
     const cleanCoreName = name => {
         const { text } = utils.splitLeadingOrInlineFlag(name);
         return text
@@ -108,11 +105,6 @@ async function operator(proxies) {
         const firstRegionOrder = regionOrder[firstItem.regionPrefix];
         const secondRegionOrder = regionOrder[secondItem.regionPrefix];
         if (firstRegionOrder !== secondRegionOrder) return firstRegionOrder - secondRegionOrder;
-        const firstMultiplierValue = multiplierValueOf(firstItem.multiplier);
-        const secondMultiplierValue = multiplierValueOf(secondItem.multiplier);
-        if (firstMultiplierValue !== secondMultiplierValue) {
-            return firstMultiplierValue - secondMultiplierValue;
-        }
         return firstItem.originalIndex - secondItem.originalIndex;
     });