feat: 报告结构支持检索方向/来源与智能新增，并修复协助卡停轮与宿主跳转

为深度研究报告结构增加检索方向与技能来源、对话式智能新增页与详情排版；澄清中间件在 after_model 可靠结束本轮，避免弱模型出卡后继续生成；任务按钮补充 host 跳转与相关深链能力。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend-web/src/components/workspace/artifacts/document-rewrite-dialog.tsx

@@ -23,7 +23,7 @@ import { Textarea } from "@/components/ui/textarea";
 import { Switch } from "@/components/ui/switch";
 import { ModelNameSelect } from "@/components/workspace/model-name-select";
 import type { DocumentRewriteStyle } from "@/open-canvas/api/rewrite";
-import { useReportStructures } from "@/strategy-components/api/report-structures";
+import { useReportStructures, REPORT_STRUCTURE_MODE_OPTIONS, normalizeReportStructureMode, type ReportStructureMode } from "@/strategy-components/api/report-structures";
 
 const KEEP_CURRENT_REPORT_STRUCTURE = "__keep_current_report_structure__";
 const DEFAULT_REWRITE_INSTRUCTION = "统一表达风格，减少重复内容，改善段落衔接；不新增原文没有依据的事实。";
@@ -34,6 +34,7 @@ export interface DocumentRewriteDialogInput {
   style: DocumentRewriteStyle;
   modelName: string | null;
   reportOutline: string;
+  structureMode: "fixed" | "adaptive";
   generateImages: boolean;
   maxGeneratedImages: number;
 }
@@ -99,6 +100,7 @@ export function DocumentRewriteDialog({
   const [style, setStyle] = useState<DocumentRewriteStyle>("formal_analysis");
   const [modelName, setModelName] = useState<string | null>(null);
   const [reportStructureId, setReportStructureId] = useState(KEEP_CURRENT_REPORT_STRUCTURE);
+  const [structureMode, setStructureMode] = useState<ReportStructureMode>("adaptive");
   const [generateImages, setGenerateImages] = useState(false);
   const [imageCount, setImageCount] = useState("2");
   const reportStructuresQuery = useReportStructures({ status: "enabled" });
@@ -116,6 +118,7 @@ export function DocumentRewriteDialog({
     setStyle("formal_analysis");
     setModelName(null);
     setReportStructureId(KEEP_CURRENT_REPORT_STRUCTURE);
+    setStructureMode("adaptive");
     setGenerateImages(false);
     setImageCount("2");
   }, [isNewReportGeneration, open]);
@@ -130,6 +133,11 @@ export function DocumentRewriteDialog({
     ));
   }, [initialReportStructureId, open]);
 
+  useEffect(() => {
+    if (!selectedReportStructure) return;
+    setStructureMode(selectedReportStructure.structureMode);
+  }, [selectedReportStructure?.id, selectedReportStructure?.structureMode]);
+
   const selectedStyle = STYLE_OPTIONS.find((item) => item.value === style);
   const canStart = instruction.trim().length > 0;
   const startWith = (handler: (input: DocumentRewriteDialogInput) => void) => {
@@ -139,6 +147,7 @@ export function DocumentRewriteDialog({
       style,
       modelName,
       reportOutline: selectedReportStructure?.content ?? "",
+      structureMode,
       generateImages,
       maxGeneratedImages: Math.min(
         Math.max(Number(imageCount) || 1, 1),
@@ -179,7 +188,7 @@ export function DocumentRewriteDialog({
           />
         </label>
 
-        <div className="grid gap-4 sm:grid-cols-3">
+        <div className="grid gap-4 sm:grid-cols-2">
           <label className="grid gap-2 text-sm font-medium">
             {isNewReportGeneration ? "报告风格" : "改写风格"}
             <Select value={style} onValueChange={(value) => setStyle(value as DocumentRewriteStyle)}>
@@ -227,6 +236,28 @@ export function DocumentRewriteDialog({
             </span>
           </label>
 
+          <label className="grid gap-2 text-sm font-medium">
+            结构约束
+            <Select
+              value={structureMode}
+              onValueChange={(value) => setStructureMode(normalizeReportStructureMode(value))}
+            >
+              <SelectTrigger aria-label="结构约束">
+                <SelectValue />
+              </SelectTrigger>
+              <SelectContent>
+                {REPORT_STRUCTURE_MODE_OPTIONS.map((option) => (
+                  <SelectItem key={option.value} value={option.value}>
+                    {option.label}
+                  </SelectItem>
+                ))}
+              </SelectContent>
+            </Select>
+            <span className="text-muted-foreground text-xs">
+              {REPORT_STRUCTURE_MODE_OPTIONS.find((option) => option.value === structureMode)?.description}
+            </span>
+          </label>
+
           <label className="grid gap-2 text-sm font-medium">
             模型
             <ModelNameSelect