diff --git a/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx b/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx
index dafe4a4b..7f9db889 100644
--- a/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx
+++ b/frontend-web/src/open-canvas/components/ai-writing/AIWritingForm.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useEffect, useMemo, useState } from 'react';
 import { PenLine } from 'lucide-react';
 
 import { Button } from '@/components/ui/button';
@@ -10,8 +10,7 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@/components/ui/select';
-import { getBackendBaseURL } from '@/core/config';
-import { apiFetch } from '@/core/api';
+import { useModels } from '@/core/models/hooks';
 
 import type { AIWritingRequest } from '../../types/ai-writing';
 import { useArticleTypes } from '../../hooks/useArticleTypes';
@@ -23,11 +22,6 @@ interface AIWritingFormProps {
   hideAdvancedFields?: boolean;
 }
 
-interface ModelOption {
-  name: string;
-  displayName: string;
-}
-
 const INPUT_CLASS =
   'flex h-12 w-full rounded-xl border border-[#e8dedd] bg-white px-4 py-2 text-sm shadow-sm ' +
   'placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 ' +
@@ -52,10 +46,24 @@ export function AIWritingForm({
   const [wordCountInput, setWordCountInput] = useState('800');
   const [strictMode, setStrictMode] = useState(false);
   const [modelName, setModelName] = useState('');
-  const [models, setModels] = useState<ModelOption[]>([]);
+  const { models, isLoading: modelsLoading } = useModels();
 
   const { articleTypes, loading: typesLoading, refresh: refreshTypes } = useArticleTypes();
 
+  // 首次 /api/models 返回后默认选第一项;配置变更导致当前值不在列表时也回退到首项。
+  useEffect(() => {
+    if (models.length === 0) return;
+    const stillExists = models.some((m) => m.name === modelName);
+    if (!modelName || !stillExists) {
+      setModelName(models[0].name);
+    }
+  }, [models, modelName]);
+
+  const selectedModel = useMemo(
+    () => models.find((m) => m.name === modelName) ?? models[0],
+    [models, modelName],
+  );
+
   // 初始化时加载文章类型
   useEffect(() => {
     refreshTypes();
@@ -81,25 +89,6 @@ export function AIWritingForm({
     }
   }
 
-  useEffect(() => {
-    apiFetch(`${getBackendBaseURL()}/api/models`)
-      .then((r) => r.json())
-      .then((data) => {
-        const list: ModelOption[] = (data.models ?? []).map(
-          (m: { name: string; display_name?: string }) => ({
-            name: m.name,
-            displayName: m.display_name || m.name,
-          }),
-        );
-        setModels(list);
-        if (list.length > 0 && !modelName) {
-          setModelName(list[0].name);
-        }
-      })
-      .catch(() => {});
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
-
   function handleWordCountBlur() {
     const num = parseInt(wordCountInput, 10);
     if (isNaN(num) || num < 100) {
@@ -122,7 +111,7 @@ export function AIWritingForm({
       wordCountTarget: wordCount,
       keywordCount: DEFAULT_KEYWORD_COUNT,
       writingMode: hideAdvancedFields ? 'loose' : strictMode ? 'strict' : 'loose',
-      modelName: modelName || undefined,
+      modelName: selectedModel?.name || modelName || undefined,
     });
   }
 
@@ -192,17 +181,25 @@ export function AIWritingForm({
         <div className="mt-4 space-y-2">
           <label className={FIELD_LABEL_CLASS}>写作模型</label>
           <Select
-            value={modelName}
+            value={selectedModel?.name ?? ''}
             onValueChange={setModelName}
-            disabled={disabled || models.length === 0}
+            disabled={disabled || modelsLoading || models.length === 0}
           >
             <SelectTrigger className={FIELD_TRIGGER_CLASS}>
-              <SelectValue placeholder={models.length > 0 ? '选择模型…' : '模型加载中…'} />
+              <SelectValue
+                placeholder={
+                  modelsLoading
+                    ? '模型加载中…'
+                    : models.length > 0
+                      ? '选择模型…'
+                      : '暂无可用模型'
+                }
+              />
             </SelectTrigger>
             <SelectContent>
               {models.map((m) => (
                 <SelectItem key={m.name} value={m.name} className="text-sm">
-                  {m.displayName}
+                  {m.display_name || m.name}
                 </SelectItem>
               ))}
             </SelectContent>
diff --git a/frontend-web/src/roundtable-planning/api/recommend.ts b/frontend-web/src/roundtable-planning/api/recommend.ts
index db73b4ed..4ccf96bd 100644
--- a/frontend-web/src/roundtable-planning/api/recommend.ts
+++ b/frontend-web/src/roundtable-planning/api/recommend.ts
@@ -27,7 +27,7 @@ export interface StreamRecommendResult {
    * `done` → picks parsed and validated, ready to populate the dialog as
    * default-checked selections.
    * `asking` → recommender failed to emit a usable [RECOMMEND_READY] block,
-   * caller should apply its fallback list (typically the 6 roundtable-* seats).
+   * caller should pick from the live candidate pool as fallback.
    * `error` → upstream / network failure.
    */
   status: "done" | "asking" | "error";
diff --git a/frontend-web/src/roundtable-planning/components/RecommendAgentsDialog.tsx b/frontend-web/src/roundtable-planning/components/RecommendAgentsDialog.tsx
index 7877bcfa..73ec432a 100644
--- a/frontend-web/src/roundtable-planning/components/RecommendAgentsDialog.tsx
+++ b/frontend-web/src/roundtable-planning/components/RecommendAgentsDialog.tsx
@@ -62,20 +62,6 @@ export interface RecommendAgentsDialogProps {
 const MIN_SELECTED = 2;
 const MAX_SELECTED = 8;
 
-/**
- * Default selection when the recommender fails or returns < 2 valid picks.
- * Intersected with the live candidate pool at runtime so missing built-ins
- * don't break the dialog.
- */
-const FALLBACK_AGENT_IDS = [
-  "roundtable-intelligence",
-  "roundtable-environment",
-  "roundtable-solution-design",
-  "roundtable-risk-review",
-  "roundtable-execution-plan",
-  "roundtable-summary",
-];
-
 type DialogPhase =
   | "idle"
   | "loading_agents"
@@ -319,12 +305,17 @@ export function RecommendAgentsDialog({
         return;
       }
 
-      // Fallback: status === "asking" or picks too few. Use the 6 built-in
-      // roundtable seats, intersected against the live pool.
-      const fallback = intersectInOrder(FALLBACK_AGENT_IDS, candidates);
-      const seed = fallback.length >= MIN_SELECTED
-        ? fallback
-        : candidates.slice(0, MIN_SELECTED).map((c) => c.agent_id);
+      // Fallback: status === "asking" or picks too few — pick from live pool.
+      const seed = candidates.slice(0, MIN_SELECTED).map((c) => c.agent_id);
+      if (seed.length < MIN_SELECTED) {
+        setState((prev) => ({
+          ...prev,
+          phase: "error",
+          streamPhase: null,
+          errorMessage: `候选智能体不足 ${MIN_SELECTED} 个,无法进入圆桌研讨。请先发布更多智能体。`,
+        }));
+        return;
+      }
       setSelectedIds(new Set(seed));
       const { rationale } = parseRecommendStreamContent(result.content || "");
       setState((prev) => ({
@@ -334,7 +325,7 @@ export function RecommendAgentsDialog({
         recommendedIds: seed,
         reasons,
         streamPhase: null,
-        warning: "智能推荐未生成有效结果,已为你勾选默认的圆桌席位,可手动调整。",
+        warning: "智能推荐未生成有效结果,已为你勾选候选池中的前几位智能体,可手动调整。",
       }));
     } catch (err) {
       if (myGen !== generationRef.current) return;
diff --git a/frontend-web/src/roundtable-planning/components/Step2Panel.tsx b/frontend-web/src/roundtable-planning/components/Step2Panel.tsx
index 557643c5..b534d929 100644
--- a/frontend-web/src/roundtable-planning/components/Step2Panel.tsx
+++ b/frontend-web/src/roundtable-planning/components/Step2Panel.tsx
@@ -15,7 +15,7 @@
  *
  * 状态全部来自 `useStep2Orchestration` —— 本组件不调任何后端、不持久化。
  */
-import { useRef } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import {
   Cpu,
   FileIcon,
@@ -80,7 +80,6 @@ export interface Step2PanelProps {
   /** 主聊天里 `present_files` 会在气泡下方渲染卡片;Step 2 沿用同一交互。 */
   openArtifactPreview: (threadId: string, path: string) => void;
   // ─── Setters ──────────────────────────────────────────────────
-  setIsRoundTableRunning: React.Dispatch<React.SetStateAction<boolean>>;
   setClarificationDraft: React.Dispatch<React.SetStateAction<string>>;
   setCustomAgentInput: React.Dispatch<React.SetStateAction<string>>;
   setAgentConfigs: React.Dispatch<
@@ -88,8 +87,10 @@ export interface Step2PanelProps {
   >;
   setSelectedAgentId: React.Dispatch<React.SetStateAction<number | null>>;
   // ─── Handlers ─────────────────────────────────────────────────
+  onPauseRoundtable: () => void;
+  onResumeRoundtable: () => void;
+  onRecordInjectMessage: () => void;
   onSubmitClarification: (answer: string) => void;
-  onInjectToRoundtable: () => void;
   onSavePersona: (id: number) => void;
   onProceedToStep3: () => void;
   onTriggerToast: (msg: string) => void;
@@ -116,13 +117,14 @@ export function Step2Panel(props: Step2PanelProps) {
     seatStubMessages,
     openArtifactFromStep,
     openArtifactPreview,
-    setIsRoundTableRunning,
     setClarificationDraft,
     setCustomAgentInput,
     setAgentConfigs,
     setSelectedAgentId,
+    onPauseRoundtable,
+    onResumeRoundtable,
+    onRecordInjectMessage,
     onSubmitClarification,
-    onInjectToRoundtable,
     onSavePersona,
     onProceedToStep3,
     onTriggerToast,
@@ -132,6 +134,25 @@ export function Step2Panel(props: Step2PanelProps) {
   const { atBottom: step2AtBottom, scrollToBottom: scrollStep2ToBottom } =
     useAutoScroll(step2ScrollRef, [step2RoundtableDialogues]);
 
+  // 干预研审 → 暂停会商:与右上角按钮共用 onPauseRoundtable;乐观 UI 避免等父 state 刷新。
+  const [pauseFlash, setPauseFlash] = useState(false);
+  const [optimisticPaused, setOptimisticPaused] = useState(false);
+  const showPausedUi = !isRoundTableRunning || optimisticPaused;
+
+  useEffect(() => {
+    if (!isRoundTableRunning) {
+      setOptimisticPaused(false);
+    }
+  }, [isRoundTableRunning]);
+
+  const handleInject = useCallback(() => {
+    setOptimisticPaused(true);
+    onPauseRoundtable();
+    onRecordInjectMessage();
+    setPauseFlash(true);
+    window.setTimeout(() => setPauseFlash(false), 1600);
+  }, [onPauseRoundtable, onRecordInjectMessage]);
+
   const isSandboxStreaming =
     isOrchestrating ||
     step2RoundtableDialogues.some((dialogue) => dialogue.streaming === true);
@@ -175,28 +196,28 @@ export function Step2Panel(props: Step2PanelProps) {
               </option>
             ))}
           </select>
-          {isRoundTableRunning ? (
+          {showPausedUi ? (
             <button
-              onClick={() => {
-                setIsRoundTableRunning(false);
-                onTriggerToast("⏸️ 会商已暂停");
-              }}
+              type="button"
+              onClick={onResumeRoundtable}
+              className={`bg-emerald-100 hover:bg-emerald-200 text-emerald-800 text-[10px] font-bold px-2.5 py-1 rounded-xl flex items-center gap-1 transition border border-emerald-200/40 shadow-sm ${
+                pauseFlash
+                  ? "ring-2 ring-emerald-400 ring-offset-1 animate-pulse"
+                  : ""
+              }`}
+            >
+              <Play className="w-3.5 h-3.5 fill-emerald-800" />
+              恢复会商
+            </button>
+          ) : (
+            <button
+              type="button"
+              onClick={onPauseRoundtable}
               className="bg-amber-100 hover:bg-amber-200 text-amber-800 text-[10px] font-bold px-2.5 py-1 rounded-xl flex items-center gap-1 transition border border-amber-200/40 shadow-sm"
             >
               <Pause className="w-3.5 h-3.5" />
               暂停会商
             </button>
-          ) : (
-            <button
-              onClick={() => {
-                setIsRoundTableRunning(true);
-                onTriggerToast("▶️ 恢复大模型并行博弈与推理决策");
-              }}
-              className="bg-emerald-100 hover:bg-emerald-200 text-emerald-800 text-[10px] font-bold px-2.5 py-1 rounded-xl flex items-center gap-1 transition border border-emerald-200/40 shadow-sm"
-            >
-              <Play className="w-3.5 h-3.5 fill-emerald-800" />
-              恢复会商
-            </button>
           )}
         </div>
       </div>
@@ -324,14 +345,16 @@ export function Step2Panel(props: Step2PanelProps) {
           value={customAgentInput}
           onChange={(e) => setCustomAgentInput(e.target.value)}
           onKeyDown={(e) => {
-            if (e.key === "Enter") onInjectToRoundtable();
+            if (e.key === "Enter") handleInject();
           }}
           placeholder="作为指挥官，您可以随时插话输入指令，对智能体博弈朝向实施人工干预..."
           className="flex-1 bg-white border border-slate-200 rounded-xl px-3.5 py-2.5 text-xs focus:outline-none focus:border-primary focus:ring-1 focus:ring-[var(--brand-200)]/50 font-medium"
         />
 
         <button
-          onClick={onInjectToRoundtable}
+          type="button"
+          onClick={handleInject}
+          title="暂停会商并记录干预指令;点击右上角「恢复会商」继续执行"
           className="bg-primary hover:bg-[var(--brand-900)] text-white text-xs font-bold px-4 py-2.5 rounded-xl transition shrink-0 cursor-pointer active:scale-95 shadow-md shadow-primary/10"
         >
           干预研审
diff --git a/frontend-web/src/roundtable-planning/hooks/useStep2Orchestration.ts b/frontend-web/src/roundtable-planning/hooks/useStep2Orchestration.ts
index 2c61e515..dcc0b717 100644
--- a/frontend-web/src/roundtable-planning/hooks/useStep2Orchestration.ts
+++ b/frontend-web/src/roundtable-planning/hooks/useStep2Orchestration.ts
@@ -26,7 +26,6 @@ import {
   type ThreadIdMap,
 } from "@/roundtable-planning/api/multi-agent";
 import {
-  DEFAULT_SELECTED_AGENTS,
   MAX_CYCLES,
   buildAgentNameToRole,
   buildRoleTemplates,
@@ -99,18 +98,8 @@ export type Step2Snapshot = {
   seatStubMessages: Record<string, StubAiMessage[]>;
 };
 
-/**
- * 6 个默认席位的初始 Persona 配置。model 留空 → 运行时 `agentConfigs[seat]?.model
- * || selectedModel || undefined`,即「席位覆盖优先,否则跟随全局模型」。
- */
-const DEFAULT_AGENT_CONFIGS: Record<number, AgentConfig> = {
-  2: { model: "", weight: 90, temp: 0.2, prompt: "你负责解析核心任务、资源极限和用户目标偏好，监督全局研商收敛。" },
-  3: { model: "", weight: 85, temp: 0.3, prompt: "你负责搜集电力、通信系统、历史极端部署条件情报，支持备灾架构体系。" },
-  4: { model: "", weight: 88, temp: 0.1, prompt: "你评估服务器机房热载荷、算力并发承载极限，预报运行瓶颈与风险时钟。" },
-  5: { model: "", weight: 92, temp: 0.4, prompt: "你负责双全栈主备建模设计，高内聚低耦合，规避不可预知停机崩溃。" },
-  6: { model: "", weight: 95, temp: 0.1, prompt: "你作为安全主管，严厉把控预算开销与合规通过率防线，识别计划漏洞。" },
-  7: { model: "", weight: 80, temp: 0.4, prompt: "你负责对72小时里程碑执行路径规划、重排和资源调配演练序列。" },
-};
+/** 席位 Persona 配置;初始为空,用户在 Persona 抽屉保存后写入。 */
+const DEFAULT_AGENT_CONFIGS: Record<number, AgentConfig> = {};
 
 export interface UseStep2OrchestrationOptions {
   /** 当前页面 currentStep,===2 触发自动 init。 */
@@ -171,9 +160,15 @@ export interface UseStep2OrchestrationReturn {
   // ─── Handlers ───────────────────────────────────────────────────────
   /** 中断当前编排循环 + 所有 in-flight SSE。 */
   stopOrchestration: () => void;
+  /** 与 Step2Panel「暂停会商」按钮相同 —— 挂起编排并中止 in-flight SSE。 */
+  pauseRoundtable: () => void;
+  /** 与 Step2Panel「恢复会商」按钮相同 —— 恢复自动研讨(含待处理的干预指令)。 */
+  resumeRoundtable: () => void;
+  /** 记录干预指令(不暂停);通常由 Step2Panel 在 pauseRoundtable 之后调用。 */
+  recordInjectMessage: () => void;
   /** 中断所有 in-flight SSE(给新建任务 / 加载草稿用)。 */
   abortAllInFlight: () => void;
-  /** 用户「干预研审」按钮 —— 追加一条人工指令气泡并触发一轮编排。 */
+  /** @deprecated 请用 pauseRoundtable + recordInjectMessage;保留兼容组合调用。 */
   handleInjectToRoundtable: () => void;
   /** 总控澄清回复 —— 把回答拼到 prompt 里再起一轮编排。 */
   submitClarification: (rawAnswer: string) => void;
@@ -247,9 +242,7 @@ export function useStep2Orchestration(
     Record<string, StubAiMessage[]>
   >({});
   const seatStubMessagesRef = useRef<Record<string, StubAiMessage[]>>({});
-  const [selectedAgents, setSelectedAgents] = useState<SelectedAgent[]>(
-    DEFAULT_SELECTED_AGENTS,
-  );
+  const [selectedAgents, setSelectedAgents] = useState<SelectedAgent[]>([]);
   const [threadIds, setThreadIds] = useState<ThreadIdMap | null>(null);
   const [coordinatorName, setCoordinatorName] = useState<string | null>(null);
   const [isInitializing, setIsInitializing] = useState<boolean>(false);
@@ -296,9 +289,8 @@ export function useStep2Orchestration(
   const orchestrationCancelRef = useRef<boolean>(false);
   const step2InitRef = useRef<boolean>(false);
   const activeAbortersRef = useRef<Set<AbortController>>(new Set());
-  /** 干预研审:暂停当前轮次后待执行的 leader prompt。 */
+  /** 干预研审:恢复会商后待执行的 leader prompt。 */
   const pendingInjectPromptRef = useRef<string | null>(null);
-  const [injectFlushToken, setInjectFlushToken] = useState(0);
   // selectedModel / agentConfigs / agentNameToRole / threadIds / coordinatorName
   // 等等被 runOrchestration 在循环里反复读取。把它们打到 ref 上,可以让
   // runOrchestration 的 useCallback deps 大幅收窄,避免每次模型切换、agentConfigs
@@ -1112,17 +1104,11 @@ export function useStep2Orchestration(
 
   // 挂起 / 恢复:与上面的 init effect 独立。`isRoundTableRunning` toggle 时:
   //   - false → stopOrchestration
-  //   - true 且 idle → 触发一次「请继续」的 leader cycle
-  // 注意 deps 故意只有 isRoundTableRunning,不再额外加 currentStep —— 回到 Step 2
-  // 检视讨论时不应该自动 fire 新的 leader 调用。
+  //   - true 且 idle → 触发 leader cycle(若有干预指令则优先执行)
   useEffect(() => {
     if (currentStep !== 2) return;
     if (!isRoundTableRunning) {
-      // 干预研审会先写入 pending 再置 false;此时 stop 已在 handler 里触发,
-      // 避免 effect 再次 stop 误杀随后 flush 启动的 inject 编排。
-      if (!pendingInjectPromptRef.current) {
-        stopOrchestration();
-      }
+      stopOrchestration();
       return;
     }
     if (
@@ -1132,6 +1118,18 @@ export function useStep2Orchestration(
       !coordinatorNameRef.current
     )
       return;
+
+    const pending = pendingInjectPromptRef.current;
+    if (pending) {
+      pendingInjectPromptRef.current = null;
+      void runOrchestration(
+        pending,
+        threadIdsRef.current,
+        coordinatorNameRef.current,
+      );
+      return;
+    }
+
     void runOrchestration(
       "用户已恢复研讨,请继续上一轮的协调工作。",
       threadIdsRef.current,
@@ -1140,53 +1138,41 @@ export function useStep2Orchestration(
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [isRoundTableRunning]);
 
-  // 干预研审:当前轮次停止后 flush 待执行的 inject 编排(编排期间 UI 仍为「恢复会商」)。
-  useEffect(() => {
-    if (isOrchestrating) return;
-    const pending = pendingInjectPromptRef.current;
-    if (!pending) return;
-    if (!threadIdsRef.current || !coordinatorNameRef.current) return;
-    pendingInjectPromptRef.current = null;
-    triggerToast("您的人工纠偏指令已同步至圆桌节点!");
-    void runOrchestration(
-      pending,
-      threadIdsRef.current,
-      coordinatorNameRef.current,
-    );
-  }, [isOrchestrating, injectFlushToken, runOrchestration, triggerToast]);
+  const pauseRoundtable = useCallback(() => {
+    setIsRoundTableRunning(false);
+    orchestrationCancelRef.current = true;
+    stopOrchestration();
+    triggerToast("⏸️ 会商已暂停");
+  }, [stopOrchestration, triggerToast]);
 
-  // ─── Public handlers ─────────────────────────────────────────────
-  const handleInjectToRoundtable = useCallback(() => {
-    if (!customAgentInput.trim()) return;
+  const resumeRoundtable = useCallback(() => {
+    setIsRoundTableRunning(true);
+    triggerToast("▶️ 恢复大模型并行博弈与推理决策");
+  }, [triggerToast]);
+
+  const recordInjectMessage = useCallback(() => {
+    const userText = customAgentInput.trim();
+    if (!userText) return;
     if (!threadIdsRef.current || !coordinatorNameRef.current) {
-      triggerToast("⚠️ 圆桌尚未就绪,请稍候");
+      triggerToast("⚠️ 圆桌尚未就绪,无法记录干预指令");
       return;
     }
 
-    const userText = customAgentInput.trim();
     setCustomAgentInput("");
-
-    const prompt = `用户人工干预新指令:${userText}\n\n请结合当前讨论状态,决定是否继续派活或直接给出更新后的结论。`;
-    pendingInjectPromptRef.current = prompt;
-
-    // 与 Step2Panel 右上角「暂停会商 / 恢复会商」联动:立即进入挂起态。
-    setIsRoundTableRunning(false);
-    stopOrchestration();
-
     appendDialogue({
       sender: "用户 (插话干预)",
       avatarType: "human",
       content: `💡 (人工指令介入) ${userText}`,
       confidence: "最高指令",
     });
+    pendingInjectPromptRef.current = `用户人工干预新指令:${userText}\n\n请结合当前讨论状态,决定是否继续派活或直接给出更新后的结论。`;
+    triggerToast("干预指令已记录,点击「恢复会商」后执行");
+  }, [appendDialogue, customAgentInput, triggerToast]);
 
-    if (isOrchestratingRef.current) {
-      triggerToast("⏸️ 会商已暂停,当前轮次结束后将处理您的干预指令");
-    } else {
-      triggerToast("⏸️ 会商已暂停,正在处理您的干预指令…");
-    }
-    setInjectFlushToken((n) => n + 1);
-  }, [appendDialogue, customAgentInput, stopOrchestration, triggerToast]);
+  const handleInjectToRoundtable = useCallback(() => {
+    pauseRoundtable();
+    recordInjectMessage();
+  }, [pauseRoundtable, recordInjectMessage]);
 
   const submitClarification = useCallback(
     (rawAnswer: string) => {
@@ -1378,6 +1364,9 @@ export function useStep2Orchestration(
     setAgentConfigs,
     resetInitGate,
     stopOrchestration,
+    pauseRoundtable,
+    resumeRoundtable,
+    recordInjectMessage,
     abortAllInFlight,
     handleInjectToRoundtable,
     submitClarification,
diff --git a/frontend-web/src/roundtable-planning/lib/roundtable-constants.ts b/frontend-web/src/roundtable-planning/lib/roundtable-constants.ts
index 37e90e31..7d860806 100644
--- a/frontend-web/src/roundtable-planning/lib/roundtable-constants.ts
+++ b/frontend-web/src/roundtable-planning/lib/roundtable-constants.ts
@@ -24,23 +24,7 @@ export type RoleEntry = {
 /** 用户在推荐弹窗选定的一个研讨席位。 */
 export type SelectedAgent = { agent_id: string; name: string };
 
-/**
- * 6 个内置 roundtable 席位的展示元数据。用户保留默认席位时,
- * 头像 / 配色 / 中文显示名都按这里走;非内置（用户自建）走 FALLBACK_AVATAR_TYPES。
- */
-export const BUILTIN_AGENT_META: Record<
-  string,
-  { avatarType: string; displayName: string }
-> = {
-  "roundtable-intelligence": { avatarType: "purple", displayName: "情报收集" },
-  "roundtable-environment": { avatarType: "emerald", displayName: "环境评估" },
-  "roundtable-solution-design": { avatarType: "human", displayName: "方案设计" },
-  "roundtable-risk-review": { avatarType: "amber", displayName: "风险审查" },
-  "roundtable-execution-plan": { avatarType: "pink", displayName: "执行规划" },
-  "roundtable-summary": { avatarType: "blue", displayName: "总结陈述" },
-};
-
-/** 非内置 agent 的头像配色轮换池。 */
+/** 研讨席位的头像配色轮换池。 */
 export const FALLBACK_AVATAR_TYPES = [
   "blue",
   "purple",
@@ -49,28 +33,12 @@ export const FALLBACK_AVATAR_TYPES = [
   "pink",
 ] as const;
 
-/**
- * 用户未确认推荐弹窗时,Step 2 默认使用的 6 个内置席位。
- * 保留默认时页面与原硬编码行为完全一致。
- */
-export const DEFAULT_SELECTED_AGENTS: SelectedAgent[] = [
-  { agent_id: "roundtable-summary", name: "总结陈述" },
-  { agent_id: "roundtable-intelligence", name: "情报收集" },
-  { agent_id: "roundtable-environment", name: "环境评估" },
-  { agent_id: "roundtable-solution-design", name: "方案设计" },
-  { agent_id: "roundtable-risk-review", name: "风险审查" },
-  { agent_id: "roundtable-execution-plan", name: "执行规划" },
-];
-
-export function getAvatarTypeFor(agentId: string, index: number): string {
-  return (
-    BUILTIN_AGENT_META[agentId]?.avatarType ??
-    FALLBACK_AVATAR_TYPES[index % FALLBACK_AVATAR_TYPES.length]
-  );
+export function getAvatarTypeFor(_agentId: string, index: number): string {
+  return FALLBACK_AVATAR_TYPES[index % FALLBACK_AVATAR_TYPES.length];
 }
 
 export function getDisplayNameFor(agent: SelectedAgent): string {
-  return BUILTIN_AGENT_META[agent.agent_id]?.displayName ?? agent.name;
+  return agent.name;
 }
 
 /**
diff --git a/frontend-web/src/roundtable-planning/pages/RoundtablePlanningPage.tsx b/frontend-web/src/roundtable-planning/pages/RoundtablePlanningPage.tsx
index 0b2f6842..ad72b49b 100644
--- a/frontend-web/src/roundtable-planning/pages/RoundtablePlanningPage.tsx
+++ b/frontend-web/src/roundtable-planning/pages/RoundtablePlanningPage.tsx
@@ -62,7 +62,6 @@ import {
 import { useStep2Orchestration } from "@/roundtable-planning/hooks/useStep2Orchestration";
 import { useDraftPersistence } from "@/roundtable-planning/hooks/useDraftPersistence";
 import {
-  BUILTIN_AGENT_META,
   getAvatarTypeFor,
   getDisplayNameFor,
   makeRolesFromTemplates,
@@ -260,8 +259,7 @@ export default function RoundtablePlanningPage() {
     (agents: Array<{ agent_id: string; name: string }>) => {
       const normalized: SelectedAgent[] = agents.map(({ agent_id, name }) => ({
         agent_id,
-        // 内置 agent 走 BUILTIN_AGENT_META;非内置用候选池传过来的 name。
-        name: BUILTIN_AGENT_META[agent_id]?.displayName ?? name ?? agent_id,
+        name: name ?? agent_id,
       }));
       step2.setSelectedAgents(normalized);
       step2.resetInitGate();
@@ -496,13 +494,14 @@ export default function RoundtablePlanningPage() {
               seatStubMessages={step2.seatStubMessages}
               openArtifactFromStep={step2.openArtifactFromStep}
               openArtifactPreview={step2.openArtifactPreview}
-              setIsRoundTableRunning={step2.setIsRoundTableRunning}
+              onPauseRoundtable={step2.pauseRoundtable}
+              onResumeRoundtable={step2.resumeRoundtable}
+              onRecordInjectMessage={step2.recordInjectMessage}
               setClarificationDraft={step2.setClarificationDraft}
               setCustomAgentInput={step2.setCustomAgentInput}
               setAgentConfigs={step2.setAgentConfigs}
               setSelectedAgentId={step2.setSelectedAgentId}
               onSubmitClarification={step2.submitClarification}
-              onInjectToRoundtable={step2.handleInjectToRoundtable}
               onSavePersona={step2.handleSaveAgentAndRecalculate}
               onProceedToStep3={() => {
                 if (!step2.hasConsensus) {
@@ -894,9 +893,7 @@ function LeftSidebar({
                 ...selectedAgents.map((agent, i) => ({
                   id: agent.agent_id,
                   name: getDisplayNameFor(agent),
-                  role: BUILTIN_AGENT_META[agent.agent_id]
-                    ? `${BUILTIN_AGENT_META[agent.agent_id].displayName} 席位`
-                    : "圆桌席位",
+                  role: "圆桌席位",
                   icon: getAvatar(getAvatarTypeFor(agent.agent_id, i), "h-7 w-7"),
                 })),
               ].map((contrib, idx) => (
@@ -956,8 +953,8 @@ function LeftSidebar({
               <IntentSectionIcon className="h-5 w-5" />
             </CollapsedSidebarSection>
 
-            <CollapsedSidebarSection title="参与角色" className="flex-1 min-h-[120px]">
-              <div className="flex flex-col items-center gap-2 overflow-y-auto max-h-[320px] custom-scrollbar">
+            <CollapsedSidebarSection title="参与角色">
+              <div className="flex flex-col items-center gap-2">
                 {roles.map((role) => (
                   <RoleAvatarBadge
                     key={role.id}
@@ -1245,7 +1242,7 @@ function CollapsedSidebarSection({
     <div
       title={title}
       className={cn(
-        "w-full bg-white border border-slate-200/50 rounded-2xl p-2 shadow-[0_2px_8px_rgba(0,0,0,0.01)] flex flex-col items-center justify-center",
+        "w-full shrink-0 bg-white border border-slate-200/50 rounded-2xl p-2 shadow-[0_2px_8px_rgba(0,0,0,0.01)] flex flex-col items-center justify-center",
         className,
       )}
     >
diff --git a/offline-backend-20260512/backend/app/gateway/routers/_roundtable_seed.py b/offline-backend-20260512/backend/app/gateway/routers/_roundtable_seed.py
index f4bd40df..96e81628 100644
--- a/offline-backend-20260512/backend/app/gateway/routers/_roundtable_seed.py
+++ b/offline-backend-20260512/backend/app/gateway/routers/_roundtable_seed.py
@@ -406,7 +406,7 @@ RECOMMENDER_AGENT_SOUL = """# 智能体推荐专员
 
 > 以下两个示例覆盖**不同任务类型**,目的是教你「思路要呼应任务本身」,**不要**把任何一个示例的具体职能链当模板。
 
-### 示例 A:合规改造任务(职能型候选池)
+### 示例 A:合规改造任务(领域候选池)
 
 **用户输入**:
 ```
@@ -415,12 +415,11 @@ RECOMMENDER_AGENT_SOUL = """# 智能体推荐专员
 关键假设:现有系统具备基础数字化能力;允许预定窗口停机
 
 候选智能体池:
-- roundtable-intelligence (情报收集):检索同类历史案例、行业最佳实践与外部情报
-- roundtable-environment (环境评估):评估硬件容量与系统量化承载力
-- roundtable-solution-design (方案设计):产出主备方案与关键路径
-- roundtable-risk-review (风险审查):合规红线检查与收敛建议
-- roundtable-execution-plan (执行规划):里程碑与资源排布
-- roundtable-summary (总结陈述):归纳冲突标记与盖印
+- compliance-research (合规调研):检索同类历史案例、行业最佳实践与监管口径
+- infra-capacity (基础设施评估):评估硬件容量与系统量化承载力
+- solution-architect (方案架构):产出主备方案与关键路径
+- risk-auditor (风险审查):合规红线检查与收敛建议
+- execution-planner (执行规划):里程碑与资源排布
 - my-cost-calc (成本测算):基于预算和资源单价计算总成本
 ```
 
@@ -431,10 +430,10 @@ RECOMMENDER_AGENT_SOUL = """# 智能体推荐专员
 ```json
 {
   "picks": [
-    {"agent_id": "roundtable-intelligence", "reason": "检索同类等保 2.0 改造案例与监管口径,直接支撑本次合规对标"},
-    {"agent_id": "roundtable-solution-design", "reason": "在 6 个月工期约束下产出主备改造方案与关键路径"},
-    {"agent_id": "roundtable-risk-review", "reason": "对照等保 2.0 合规红线审查方案,避免后期返工"},
-    {"agent_id": "roundtable-execution-plan", "reason": "把改造拆成可在 6 个月内交付的里程碑与资源排布"},
+    {"agent_id": "compliance-research", "reason": "检索同类等保 2.0 改造案例与监管口径,直接支撑本次合规对标"},
+    {"agent_id": "solution-architect", "reason": "在 6 个月工期约束下产出主备改造方案与关键路径"},
+    {"agent_id": "risk-auditor", "reason": "对照等保 2.0 合规红线审查方案,避免后期返工"},
+    {"agent_id": "execution-planner", "reason": "把改造拆成可在 6 个月内交付的里程碑与资源排布"},
     {"agent_id": "my-cost-calc", "reason": "校验整体方案落在 500 万元预算硬约束内"}
   ]
 }
@@ -453,7 +452,7 @@ RECOMMENDER_AGENT_SOUL = """# 智能体推荐专员
 - channel-planner (渠道规划师):按预算和受众设计跨平台投放组合
 - audience-insight (受众洞察):画像、关键词、情绪点研究
 - creative-copy (创意文案):产出落地页与社媒文案变体
-- roundtable-risk-review (风险审查):合规红线检查与收敛建议
+- ad-compliance (广告合规):审查文案与素材合规风险
 ```
 
 **你的输出**:
@@ -471,8 +470,8 @@ RECOMMENDER_AGENT_SOUL = """# 智能体推荐专员
 }
 ```
 
-> **关键观察**:示例 A 选了 `roundtable-intelligence / solution-design / execution-plan` 等"职能型"智能体,示例 B **完全没用任何 `roundtable-*` 内置**,而是从用户自建的领域智能体里挑。
-> 这是因为:**候选池里的智能体能不能匹配任务,只看 description 和任务的实际语义,不看 id 是不是 `roundtable-` 开头**。如果候选池里有"广告设计智能体"且任务是广告设计,**你必须挑它**,而不是套用示例 A 的职能链。
+> **关键观察**:两个示例都从候选池里按任务语义挑选,**不要**套用固定职能链(如"调研→设计→风险→执行")。
+> 候选池里的智能体能不能匹配任务,只看 description 和任务的实际语义。如果候选池里有"广告设计智能体"且任务是广告设计,**你必须挑它**,而不是机械复制示例 A 的链路。
 """