feat(roundtable): 业务链条左栏卡片拖动手柄 + 加入按钮 + 智能体详情抽屉

- 左栏候选卡片加拖动手柄（与右栏席位一致），仅点手柄才拖动
- 加入改为显式「加入」按钮，点卡片本体改为打开详情抽屉
- 右栏席位操作区加「查看详情」按钮，打开同一抽屉
- 新增 AgentDetailSheet：按需拉取（useAgent）展示名称/模型/描述/
  标签/技能+工具组/人设，对齐智能体详情页内容

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/roundtable-planning/components/AgentDetailSheet.tsx

@@ -0,0 +1,151 @@
+/**
+ * 智能体详情抽屉（右侧 Sheet）。
+ *
+ * 业务链条配置页：左栏候选卡片点击卡片本体、右栏席位点「查看详情」都打开这个抽屉，
+ * 展示该智能体的详情（与「智能体」详情页展示的内容差不多）：名称 / 模型 / 描述 /
+ * 标签 / 技能 + 工具组 / 人设（SOUL.md）。
+ *
+ * 详情按需拉取：`useAgent(open ? agentId : null)` —— 抽屉打开时才请求 `GET /api/agents/{id}`
+ * （该接口才返回 soul），关闭不请求。字段渲染对齐 `components/workspace/agents/agent-card.tsx`。
+ */
+import { Bot, Globe, Loader2, Lock } from "lucide-react";
+
+import { Badge } from "@/components/ui/badge";
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetHeader,
+  SheetTitle,
+} from "@/components/ui/sheet";
+import { TagChipList } from "@/components/workspace/tags/tag-chip";
+import { useAgent } from "@/core/agents";
+import { desensitize } from "@/lib/desensitize";
+
+export function AgentDetailSheet({
+  agentId,
+  /** 卡片/席位上的名称快照，详情还没拉回来时先用它占位。 */
+  fallbackName,
+  open,
+  onOpenChange,
+}: {
+  agentId: string | null;
+  fallbackName?: string;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+}) {
+  // 抽屉打开时才拉详情（含 soul）；关闭传 null 让 useAgent 不发请求。
+  const { agent, isLoading } = useAgent(open ? agentId : null);
+  const name = agent?.name || fallbackName || agentId || "";
+  const skillItems = agent?.skills ?? [];
+  const toolGroups = agent?.tool_groups ?? [];
+  const hasSkillsOrTools = skillItems.length > 0 || toolGroups.length > 0;
+
+  return (
+    <Sheet open={open} onOpenChange={onOpenChange}>
+      <SheetContent side="right" className="w-full gap-0 p-0 sm:max-w-md">
+        <SheetHeader className="border-b border-border px-5 py-4">
+          <SheetTitle className="flex items-center gap-2.5">
+            <span className="flex size-8 shrink-0 items-center justify-center rounded-md bg-primary/10 text-primary">
+              <Bot className="size-4" />
+            </span>
+            <span className="min-w-0 flex-1 truncate text-base font-bold">{name}</span>
+            {agent?.model && (
+              <Badge variant="outline" className="shrink-0 text-[10px]">
+                {desensitize(agent.model)}
+              </Badge>
+            )}
+          </SheetTitle>
+          <SheetDescription className="sr-only">智能体详情</SheetDescription>
+        </SheetHeader>
+
+        <div className="min-h-0 flex-1 space-y-5 overflow-y-auto px-5 py-4 text-sm">
+          {isLoading && !agent ? (
+            <div className="flex items-center gap-2 py-8 text-muted-foreground">
+              <Loader2 className="size-4 animate-spin" />
+              正在加载详情…
+            </div>
+          ) : !agent ? (
+            <div className="py-8 text-center text-muted-foreground">
+              未找到该智能体的详情（可能已被删除）。
+            </div>
+          ) : (
+            <>
+              {/* 状态徽标 */}
+              <div className="flex flex-wrap items-center gap-1.5">
+                {agent.builtin && (
+                  <Badge variant="secondary" className="text-[10px]">内置</Badge>
+                )}
+                {agent.published && (
+                  <Badge variant="outline" className="gap-1 text-[10px]">
+                    <Globe className="size-3" />
+                    已发布
+                  </Badge>
+                )}
+                {agent.is_private && (
+                  <Badge variant="outline" className="gap-1 text-[10px]">
+                    <Lock className="size-3" />
+                    私密
+                  </Badge>
+                )}
+              </div>
+
+              {/* 描述 */}
+              <section className="space-y-1.5">
+                <h4 className="text-[11px] font-bold uppercase tracking-wide text-muted-foreground">
+                  描述
+                </h4>
+                <p className="whitespace-pre-wrap leading-relaxed text-foreground">
+                  {agent.description?.trim() || "（无描述）"}
+                </p>
+              </section>
+
+              {/* 标签 */}
+              {agent.tags && agent.tags.length > 0 && (
+                <section className="space-y-1.5">
+                  <h4 className="text-[11px] font-bold uppercase tracking-wide text-muted-foreground">
+                    标签
+                  </h4>
+                  <TagChipList tags={agent.tags} />
+                </section>
+              )}
+
+              {/* 技能 / 工具组 */}
+              {hasSkillsOrTools && (
+                <section className="space-y-1.5">
+                  <h4 className="text-[11px] font-bold uppercase tracking-wide text-muted-foreground">
+                    技能与工具
+                  </h4>
+                  <div className="flex flex-wrap gap-1.5">
+                    {toolGroups.map((group) => (
+                      <Badge key={`tg:${group}`} variant="outline" className="text-xs">
+                        {desensitize(group)}
+                      </Badge>
+                    ))}
+                    {skillItems.map((skill) => (
+                      <Badge key={`sk:${skill}`} variant="secondary" className="text-xs">
+                        {desensitize(skill)}
+                      </Badge>
+                    ))}
+                  </div>
+                </section>
+              )}
+
+              {/* 人设（SOUL.md） */}
+              {agent.soul?.trim() && (
+                <section className="space-y-1.5">
+                  <h4 className="text-[11px] font-bold uppercase tracking-wide text-muted-foreground">
+                    人设
+                  </h4>
+                  <pre className="whitespace-pre-wrap break-words rounded-md border border-border bg-muted/30 p-3 text-[12px] leading-relaxed text-foreground">
+                    {agent.soul}
+                  </pre>
+                </section>
+              )}
+            </>
+          )}
+        </div>
+      </SheetContent>
+    </Sheet>
+  );
+}

frontend-web/src/roundtable-planning/pages/BusinessChainEditorPage.tsx

@@ -30,6 +30,7 @@ import {
   GitBranch,
   Globe,
   GripVertical,
+  Info,
   Layers,
   Loader2,
   Network,
@@ -110,6 +111,7 @@ import {
 } from "@/roundtable-planning/lib/chain-stages";
 import { getAvatarTypeFor } from "@/roundtable-planning/lib/roundtable-constants";
 import { DagFlowChart } from "@/roundtable-planning/components/DagFlowChart";
+import { AgentDetailSheet } from "@/roundtable-planning/components/AgentDetailSheet";
 
 const POOL_PREFIX = "pool::";
 const SEAT_PREFIX = "seat::";
@@ -155,6 +157,11 @@ export default function BusinessChainEditorPage() {
   const [activeDrag, setActiveDrag] = useState<ActiveDrag>(null);
   const [dropdownOpen, setDropdownOpen] = useState(false);
   const [flowOpen, setFlowOpen] = useState(false);
+  // 详情抽屉：左栏点卡片本体、右栏点「查看详情」都打开它，展示该智能体详情。
+  const [detailAgent, setDetailAgent] = useState<{ id: string; name?: string } | null>(null);
+  const showDetail = useCallback((id: string, name?: string) => {
+    setDetailAgent({ id, name });
+  }, []);
 
   const sensors = useSensors(
     useSensor(PointerSensor, { activationConstraint: { distance: 5 } }),
@@ -763,7 +770,7 @@ export default function BusinessChainEditorPage() {
                   {pool.length}
                 </span>
               </div>
-              <span className="text-[11px] font-medium text-muted-foreground">拖到右侧 / 点击加入</span>
+              <span className="text-[11px] font-medium text-muted-foreground">拖手柄到右侧 / 点卡片看详情</span>
             </div>
 
             <div className="shrink-0 border-b border-border px-4 py-3">
@@ -794,6 +801,7 @@ export default function BusinessChainEditorPage() {
                     agent={a}
                     inChain={seatIdSet.has(a.agent_id)}
                     onAdd={() => addAgentAsNewStage(a.agent_id)}
+                    onShowDetail={() => showDetail(a.agent_id, a.name)}
                   />
                 ))
               )}
@@ -813,6 +821,7 @@ export default function BusinessChainEditorPage() {
             onMergeSeat={mergeSeatToStage}
             onSplitSeat={splitSeat}
             onStageGoalChange={setGoal}
+            onSeatDetail={showDetail}
           />
         </main>
 
@@ -873,6 +882,16 @@ export default function BusinessChainEditorPage() {
         </Dialog>
       )}
 
+      {/* 智能体详情抽屉（左栏卡片 / 右栏席位共用） */}
+      <AgentDetailSheet
+        agentId={detailAgent?.id ?? null}
+        fallbackName={detailAgent?.name}
+        open={detailAgent !== null}
+        onOpenChange={(o) => {
+          if (!o) setDetailAgent(null);
+        }}
+      />
+
       {/* 页脚 */}
       <footer className="shrink-0 select-none border-t border-border bg-card px-6 py-3 text-center text-[11px] text-muted-foreground">
         分层编排：同一 Stage 内的席位并行研讨，Stage 之间串行。全单席位 = 线性链。保存后自动同步至圆桌。
@@ -887,11 +906,14 @@ function PoolAgentCard({
   agent,
   inChain,
   onAdd,
+  onShowDetail,
 }: {
   agent: RecommendCandidate;
   inChain: boolean;
   onAdd: () => void;
+  onShowDetail: () => void;
 }) {
+  // 只把拖拽 listeners 挂到左侧手柄上 —— 点手柄才拖动；点卡片本体打开详情抽屉。
   const { attributes, listeners, setNodeRef, isDragging } = useDraggable({
     id: POOL_PREFIX + agent.agent_id,
     disabled: inChain,
@@ -899,55 +921,79 @@ function PoolAgentCard({
   return (
     <div
       ref={setNodeRef}
-      onClick={inChain ? undefined : onAdd}
+      onClick={onShowDetail}
       className={cn(
-        "group relative flex items-start gap-3 border p-3.5 transition-all duration-150",
+        "group relative flex items-stretch overflow-hidden border transition-all duration-150",
         R_CARD,
         inChain
-          ? "cursor-default border-primary/30 bg-primary/[0.03]"
+          ? "cursor-pointer border-primary/30 bg-primary/[0.03]"
           : "cursor-pointer border-border bg-card hover:border-primary hover:shadow-[0_2px_8px_rgba(0,0,0,0.04)]",
         isDragging && "opacity-30",
       )}
-      {...(inChain ? {} : listeners)}
       {...attributes}
     >
-      <div
+      {/* 拖拽手柄（与右栏席位一致）：点手柄才开始拖动；已加入则禁用拖拽。 */}
+      <button
+        type="button"
+        onClick={(e) => e.stopPropagation()}
         className={cn(
-          "mt-0.5 flex size-6 shrink-0 items-center justify-center transition-colors",
+          "flex w-7 shrink-0 items-center justify-center border-r border-border bg-muted/40 text-muted-foreground/60 transition-colors",
-          R_CARD,
           inChain
-            ? "bg-primary/10 text-primary"
+            ? "cursor-not-allowed opacity-40"
-            : "bg-muted text-muted-foreground group-hover:bg-primary/10 group-hover:text-primary",
+            : "cursor-grab touch-none hover:text-foreground active:cursor-grabbing",
         )}
+        title={inChain ? "已在链条中" : "拖动到右侧加入 / 排序"}
+        {...(inChain ? {} : listeners)}
       >
-        <Bot className="size-3.5" />
+        <GripVertical className="size-3.5" />
-      </div>
+      </button>
 
-      <div className="min-w-0 flex-1 pr-16">
+      <div className="flex min-w-0 flex-1 items-start gap-3 p-3 pr-2">
-        <div className="truncate text-xs font-bold leading-tight text-foreground transition-colors group-hover:text-primary">
+        <div
-          {agent.name || agent.agent_id}
+          className={cn(
+            "mt-0.5 flex size-6 shrink-0 items-center justify-center transition-colors",
+            R_CARD,
+            inChain
+              ? "bg-primary/10 text-primary"
+              : "bg-muted text-muted-foreground group-hover:bg-primary/10 group-hover:text-primary",
+          )}
+        >
+          <Bot className="size-3.5" />
         </div>
-        {agent.description && (
+
-          <div className="mt-1 line-clamp-2 text-[11px] font-medium leading-normal text-muted-foreground">
+        <div className="min-w-0 flex-1">
-            {agent.description}
+          <div className="truncate text-xs font-bold leading-tight text-foreground transition-colors group-hover:text-primary">
+            {agent.name || agent.agent_id}
           </div>
-        )}
+          {agent.description && (
+            <div className="mt-1 line-clamp-2 text-[11px] font-medium leading-normal text-muted-foreground">
+              {agent.description}
+            </div>
+          )}
+        </div>
       </div>
 
-      <div className="absolute right-3.5 top-3.5 shrink-0 select-none">
+      {/* 加入按钮：只有点它才加入（点卡片其它区域是看详情）。已加入显示「已加入」。 */}
+      <div className="flex shrink-0 items-center pr-3 pl-1 select-none">
         {inChain ? (
           <span className={cn("border border-primary/30 bg-primary/10 px-2 py-1 text-[10px] font-bold text-primary", R_CTRL)}>
             已加入
           </span>
         ) : (
-          <span
+          <button
+            type="button"
+            onClick={(e) => {
+              e.stopPropagation();
+              onAdd();
+            }}
             className={cn(
-              "border border-transparent bg-muted px-2 py-1 text-[10px] font-semibold text-muted-foreground transition-all group-hover:border-primary/30 group-hover:bg-primary/10 group-hover:text-primary",
+              "inline-flex items-center gap-1 border border-primary/30 bg-primary/5 px-2 py-1 text-[10px] font-semibold text-primary transition-all hover:bg-primary/10",
               R_CTRL,
             )}
           >
-            点击加入
+            <Plus className="size-3" />
-          </span>
+            加入
+          </button>
         )}
       </div>
     </div>
@@ -968,6 +1014,7 @@ function StagesColumn({
   onMergeSeat,
   onSplitSeat,
   onStageGoalChange,
+  onSeatDetail,
 }: {
   stageGroups: StageGroups;
   seatCount: number;
@@ -980,6 +1027,7 @@ function StagesColumn({
   onMergeSeat: (agentId: string, targetStageIdx: number) => void;
   onSplitSeat: (agentId: string) => void;
   onStageGoalChange: (stageIdx: number, goal: string) => void;
+  onSeatDetail: (agentId: string, name?: string) => void;
 }) {
   // 跨 Stage 的全局序号（头像编号）：每个 Stage 起始累加。
   const stageStartIndex = useMemo(() => {
@@ -1073,6 +1121,7 @@ function StagesColumn({
                 onMergeSeat={onMergeSeat}
                 onSplitSeat={onSplitSeat}
                 onGoalChange={(goal) => onStageGoalChange(stageIdx, goal)}
+                onSeatDetail={onSeatDetail}
               />
             ))}
             <NewStageDropZone hasEmptyStage={hasEmptyStage} onAddStage={onAddStage} />
@@ -1097,6 +1146,7 @@ function StageSection({
   onMergeSeat,
   onSplitSeat,
   onGoalChange,
+  onSeatDetail,
 }: {
   stageIdx: number;
   group: StageGroup;
@@ -1110,6 +1160,7 @@ function StageSection({
   onMergeSeat: (agentId: string, targetStageIdx: number) => void;
   onSplitSeat: (agentId: string) => void;
   onGoalChange: (goal: string) => void;
+  onSeatDetail: (agentId: string, name?: string) => void;
 }) {
   const { setNodeRef, isOver } = useDroppable({ id: STAGE_PREFIX + stageIdx });
   const seats = group.seats;
@@ -1238,6 +1289,7 @@ function StageSection({
                 onMergeUp={() => onMergeSeat(seat.agent_id, stageIdx - 1)}
                 onMergeDown={() => onMergeSeat(seat.agent_id, stageIdx + 1)}
                 onSplit={() => onSplitSeat(seat.agent_id)}
+                onDetail={() => onSeatDetail(seat.agent_id, seat.name)}
               />
             ))}
           </SortableContext>
@@ -1259,6 +1311,7 @@ function SeatStrip({
   onMergeUp,
   onMergeDown,
   onSplit,
+  onDetail,
 }: {
   seat: ChainSeat;
   globalIndex: number;
@@ -1270,6 +1323,7 @@ function SeatStrip({
   onMergeUp: () => void;
   onMergeDown: () => void;
   onSplit: () => void;
+  onDetail: () => void;
 }) {
   const { attributes, listeners, setNodeRef, transform, transition, isDragging } =
     useSortable({ id: SEAT_PREFIX + seat.agent_id });
@@ -1319,8 +1373,19 @@ function SeatStrip({
         )}
       </div>
 
-      {/* 控制：并入上一阶段 / 独立成阶段 / 并入下一阶段 / 移除 */}
+      {/* 控制：查看详情 / 并入上一阶段 / 独立成阶段 / 并入下一阶段 / 移除 */}
       <div className="flex shrink-0 items-center gap-0.5 border-l border-border px-2">
+        <button
+          type="button"
+          onClick={onDetail}
+          title="查看详情"
+          className={cn(
+            "p-1 text-muted-foreground transition hover:bg-muted hover:text-foreground",
+            R_CTRL,
+          )}
+        >
+          <Info className="size-3.5" />
+        </button>
         <button
           type="button"
           onClick={onMergeUp}