chore: reasoning content without <think> tag

src/pages/llmodels/style/instance-item.less

@@ -15,6 +15,7 @@
     display: flex;
     justify-content: flex-start;
     align-items: center;
+    color: var(--ant-blue-5);
 
     .text {
       display: none;

src/pages/playground/components/multiple-chat/think-parser.ts

@@ -13,32 +13,43 @@ class ThinkParser {
 
   parse(chunk: string) {
     while (this.lastCheckedIndex < chunk.length) {
+      let startIndex = chunk.indexOf('<think>', this.lastCheckedIndex);
+      let endIndex = chunk.indexOf('</think>', this.lastCheckedIndex);
+
       if (!this.collecting) {
-        let startIndex = chunk.indexOf('<think>', this.lastCheckedIndex);
-        if (startIndex !== -1) {
+        if (endIndex !== -1 && (startIndex === -1 || endIndex < startIndex)) {
+          // 1 发现 `</think>`，但之前没有 `<think>`：
+          // 将 `result` + `</think>` 之前的内容作为 `thought`
+          this.thought =
+            this.result + chunk.substring(this.lastCheckedIndex, endIndex);
+          this.result = ''; // **清空 result**
+          this.lastCheckedIndex = endIndex + 8; // 跳过 `</think>`
+        } else if (startIndex !== -1) {
+          // 2 发现 `<think>`，进入思考模式：
           this.result += chunk.substring(this.lastCheckedIndex, startIndex);
           this.collecting = true;
-          this.lastCheckedIndex = startIndex + 7;
+          this.lastCheckedIndex = startIndex + 7; // 跳过 `<think>`
         } else {
+          // 3 没有 `<think>` 也没有 `</think>`，直接追加到 `result`
           this.result += chunk.substring(this.lastCheckedIndex);
           this.lastCheckedIndex = chunk.length;
-          break;
         }
       } else {
-        let endIndex = chunk.indexOf('</think>', this.lastCheckedIndex);
         if (endIndex !== -1) {
+          // 4 发现 `</think>`，结束思考模式：
           this.thought += chunk.substring(this.lastCheckedIndex, endIndex);
+
           this.collecting = false;
-          this.lastCheckedIndex = endIndex + 8;
+          this.lastCheckedIndex = endIndex + 8; // 跳过 `</think>`
         } else {
+          // 5 仍在思考模式中，追加到 `thought`
           this.thought += chunk.substring(this.lastCheckedIndex);
           this.lastCheckedIndex = chunk.length;
-          break;
         }
       }
     }
 
-    return { thought: this.thought.trimStart(), result: this.result };
+    return { thought: this.thought.trim(), result: this.result };
   }
 
   reset() {