feat: 提升并发容量默认配置

ai_knowledge_base_v2/apps/admin-web/src/App.vue

@@ -1067,6 +1067,12 @@ async function clearFeishuCache() {
                     v-model="systemSettingValues[setting.key]"
                   />
                   <small>{{ setting.description }}</small>
+                  <small
+                    v-if="setting.valueHint"
+                    class="setting-value-hint"
+                  >
+                    {{ setting.valueHint(systemSettingValues[setting.key]) }}
+                  </small>
                 </label>
               </div>
             </div>

ai_knowledge_base_v2/apps/admin-web/src/config/systemSettings.ts

@@ -16,6 +16,7 @@ export interface SystemSettingDefinition {
   placeholder?: string;
   options?: SystemSettingOption[];
   description: string;
+  valueHint?: (value: SystemSettingValue) => string;
 }
 
 export interface SystemSettingSection {
@@ -181,28 +182,29 @@ export const systemSettingSections: SystemSettingSection[] = [
         key: "chat_max_active_requests",
         label: "问答最大并发数",
         type: "number",
-        defaultValue: 2,
+        defaultValue: 30,
         min: 1,
         max: 1000,
-        description: "同一后端进程内同时进入飞书和模型生成链路的最大请求数。",
+        description: "用户正式问答的全局执行上限；Redis 可用时由所有后端实例共享，超过后进入排队。",
+        valueHint: concurrentCapacityHint,
       },
       {
         key: "chat_max_queue_size",
         label: "问答最大排队数",
         type: "number",
-        defaultValue: 20,
+        defaultValue: 90,
         min: 0,
         max: 10000,
-        description: "超过最大并发后允许等待的请求数量，超过后直接提示稍后再试。",
+        description: "超过最大并发后允许等待的请求数量。默认按并发数的 3 倍预留，避免课程结束后的集中提问被直接拒绝。",
       },
       {
         key: "chat_queue_timeout_seconds",
         label: "问答排队超时（秒）",
         type: "number",
-        defaultValue: 60,
+        defaultValue: 90,
         min: 1,
         max: 3600,
-        description: "请求在排队中超过该时间后自动结束并提示用户稍后再试。",
+        description: "请求在排队中超过该时间后自动结束。默认 90 秒可覆盖 30 并发下约三轮请求释放。",
       },
       {
         key: "chat_active_lease_seconds",
@@ -292,4 +294,16 @@ export const systemSettingSections: SystemSettingSection[] = [
   },
 ];
 
+function concurrentCapacityHint(value: SystemSettingValue) {
+  const concurrency = Math.max(1, Number(value) || 1);
+  const lower = roundDownToTen((concurrency * 120) / 25 / 1.4);
+  const upper = roundDownToTen((concurrency * 120) / 25 / 1.2);
+  const capacity = lower === upper ? `约 ${lower} 人` : `约 ${lower}–${upper} 人`;
+  return `容量估算：按单次问答约 25 秒并预留 20%–40% 波动，当前 ${concurrency} 并发可承接 2 分钟内${capacity}集中提问。实际能力还受模型服务商额度和回答时长影响。`;
+}
+
+function roundDownToTen(value: number) {
+  return Math.max(1, Math.floor(value / 10) * 10);
+}
+
 export const systemSettingDefinitions = systemSettingSections.flatMap((section) => section.settings);

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

@@ -1725,6 +1725,14 @@ textarea {
   line-height: 1.5;
 }
 
+.setting-field > .setting-value-hint {
+  padding: 9px 11px;
+  border: 1px solid #cde6dc;
+  border-radius: 8px;
+  background: #f3faf7;
+  color: #246b52;
+}
+
 .setting-field .el-input-number,
 .setting-field .el-input,
 .setting-field .el-select {