fix: 修复审查发现的3个问题

1. api-server.js: 更新过时的 performHealthChecks(true) 调用
   - 方法签名改了，不再接受 isInit 参数
   - 改为 performHealthChecks()

2. i18n.js: 更新描述以匹配实际行为
   - '留空则检查所有供应商' -> '留空则不进行任何检查'

3. provider-pool-manager.js & provider-api.js: 移除死代码
   - _checkProviderHealth 从不返回 null
   - 移除对 result === null 的检查

src/providers/provider-pool-manager.js

@@ -1828,12 +1828,6 @@ export class ProviderPoolManager {
                 const result = await this._checkProviderHealth(providerType, provider.config);
                 const checkDuration = Date.now() - checkStartTime;
                 
-                // result === null means check not implemented for this provider type
-                if (result === null) {
-                    this._log('info', `[ScheduledHealthCheck] ${displayName} (${providerType}): check skipped - not implemented (${checkDuration}ms)`);
-                    continue;
-                }
-                
                 if (!result.success) {
                     // Provider is unhealthy
                     failCount++;

src/services/api-server.js

@@ -355,11 +355,11 @@ async function startServer() {
             setInterval(heartbeatAndRefreshToken, CONFIG.CRON_NEAR_MINUTES * 60 * 1000);
         }
         // 服务器完全启动后,执行初始健康检查
-        const poolManager = getProviderPoolManager();
-        if (poolManager) {
-            logger.info('[Initialization] Performing initial health checks for provider pools...');
-            poolManager.performHealthChecks(true);
-        }
+         const poolManager = getProviderPoolManager();
+         if (poolManager) {
+             logger.info('[Initialization] Performing initial health checks for provider pools...');
+             poolManager.performHealthChecks();
+         }
 
         // 定时健康检查
          const scheduledConfig = CONFIG.SCHEDULED_HEALTH_CHECK;

src/ui-modules/provider-api.js

@@ -709,18 +709,9 @@ export async function handleHealthCheck(req, res, currentConfig, providerPoolMan
                 continue;
             }
 
-            try {
+             try {
                 const healthResult = await providerPoolManager._checkProviderHealth(providerType, providerConfig);
                 
-                if (healthResult === null) {
-                    results.push({
-                        uuid: providerConfig.uuid,
-                        success: null,
-                        message: 'Health check not supported for this provider type'
-                    });
-                    continue;
-                }
-                
                 if (healthResult.success) {
                     providerPoolManager.markProviderHealthy(providerType, providerConfig, false, healthResult.modelName);
                     results.push({

static/app/i18n.js

@@ -349,7 +349,7 @@ const translations = {
         'config.healthCheck.interval': '检查间隔',
         'config.healthCheck.intervalNote': '单位毫秒，最小60000ms(1分钟)，最大3600000ms(1小时)，可手动输入或点击快捷按钮',
         'config.healthCheck.providerTypes': '定时检查的供应商',
-        'config.healthCheck.providerTypesNote': '选择需要进行定时健康检查的供应商类型，留空则检查所有供应商',
+        'config.healthCheck.providerTypesNote': '选择需要进行定时健康检查的供应商类型，留空则不进行任何检查',
         'config.log.title': '日志设置',
         'config.log.enabled': '启用日志',
         'config.log.outputMode': '日志输出模式',