fix(frontend): guard availableFields.includes in renderRuleConfig

config.availableFields may be undefined or a non-array value (e.g. {}),
causing TypeError when calling .includes/.every directly on it.
Precompute cfgAvailableFields with Array.isArray guard before use.

Fixes: N.includes is not a function on rules/new page.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/components/rules/new/ReviewSettings.tsx

@@ -872,10 +872,10 @@ export function ReviewSettings({
     const { id, type, config } = rule;
     
     // 如果规则中的availableFields不是最新的，则更新它
-    if (type && config && (!config.availableFields || 
-        (Array.isArray(config.availableFields) && 
-         !availableFields.every((field) => (config.availableFields as string[]).includes(field)) ||
-         !(config.availableFields as string[]).every((field) => availableFields.includes(field))))) {
+    const cfgAvailableFields = Array.isArray(config.availableFields) ? config.availableFields as string[] : null;
+    if (type && config && (!cfgAvailableFields ||
+        !availableFields.every((field) => cfgAvailableFields.includes(field)) ||
+        !cfgAvailableFields.every((field) => availableFields.includes(field)))) {
       // 延迟更新以避免在渲染过程中修改状态
       setTimeout(() => {
         // console.log('Updating rule config with new available fields:', availableFields);