feat: update ali stream implementation & enable internet search (#856)

* Update relay-ali.go: 改进stream模式，添加联网搜索能力

通义千问支持stream的增量模式，不需要每次去掉上次的前缀；实测qwen-max联网模式效果不错，添加了联网模式。如果别的模型有问题可以改为单独给qwen-max开放

* 删除"stream参数"

刚发现原来阿里api没有这个参数，上次误加了。

* refactor: only enable search when specified

* fix: remove custom suffix when get model ratio

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Co-authored-by: JustSong <songquanpeng@foxmail.com>

web/src/pages/Channel/EditChannel.js

@@ -70,6 +70,13 @@ const EditChannel = () => {
           break;
         case 17:
           localModels = ['qwen-turbo', 'qwen-plus', 'qwen-max', 'qwen-max-longcontext', 'text-embedding-v1'];
+          let withInternetVersion = [];
+          for (let i = 0; i < localModels.length; i++) {
+            if (localModels[i].startsWith('qwen-')) {
+              withInternetVersion.push(localModels[i] + '-internet');
+            }
+          }
+          localModels = [...localModels, ...withInternetVersion];
           break;
         case 16:
           localModels = ['chatglm_turbo', 'chatglm_pro', 'chatglm_std', 'chatglm_lite'];