fix(platform): 渠道并发 - 支持后台热配置并等待空闲槽位 (#34)

Co-authored-by: ddCat <ddcat666@88.com>

web/src/stores/use-config-store.ts

@@ -20,6 +20,7 @@ export type ModelChannel = {
     scope?: "system" | "user";
     enabled?: boolean;
     hasApiKey?: boolean;
+    concurrencyLimit?: number;
     modelCosts?: Array<{
         model: string;
         capability: ModelCapability;