feat: add agent response depth control

ai_knowledge_base_v2/apps/admin-web/src/styles.css

@@ -1049,12 +1049,46 @@ textarea {
   line-height: 1.6;
 }
 
+.agent-response-depth {
+  margin: 16px 0 0;
+  padding: 14px 16px 18px;
+  border: 1px solid #dce7e3;
+  border-radius: 8px;
+  background: #ffffff;
+}
+
+.agent-response-depth > .el-form-item__content {
+  display: grid;
+  gap: 14px;
+}
+
+.agent-response-depth-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  width: 100%;
+}
+
+.agent-response-depth .el-slider {
+  --el-slider-main-bg-color: #0f735d;
+  --el-slider-runway-bg-color: #dce7e3;
+  width: calc(100% - 12px);
+  margin: 2px 6px 0;
+}
+
 @media (max-width: 680px) {
   .agent-stream-setting > .el-form-item__content {
     align-items: flex-start;
     flex-direction: column;
     gap: 12px;
   }
+
+  .agent-response-depth-head {
+    align-items: flex-start;
+    flex-direction: column;
+    gap: 10px;
+  }
 }
 
 .agent-parameter-label {