feat(web): 生成器 ThinkingIndicator/空结果态/数量校验 + 文风页 PageHeader + Codex 分段控件 + RefineView role 修正

apps/web/components/generation/WorldGenerator.tsx

@@ -1,10 +1,12 @@
 "use client";
 
 import { useCallback, useState } from "react";
-import { Copy, Sparkles } from "lucide-react";
+import { Copy, Globe2, RotateCcw, Sparkles } from "lucide-react";
 
 import { useToast } from "@/components/Toast";
+import { ThinkingIndicator } from "@/components/ThinkingIndicator";
 import { Button } from "@/components/ui/Button";
+import { EmptyState } from "@/components/ui/EmptyState";
 import { Field } from "@/components/ui/Field";
 import { SectionHeader } from "@/components/ui/SectionHeader";
 import { StatusNote } from "@/components/ui/StatusNote";
@@ -72,6 +74,49 @@ export function WorldGenerator({ projectId }: WorldGeneratorProps) {
         </Button>
       </div>
 
+      {generating ? (
+        <div className="rounded border border-line bg-panel/50 p-4 text-cinnabar">
+          <ThinkingIndicator label="生成中" />
+        </div>
+      ) : null}
+
+      {gen.status === "error" ? (
+        <StatusNote variant="danger">
+          <span className="flex flex-wrap items-center gap-3">
+            <span>生成失败，请稍后重试。</span>
+            <Button
+              type="button"
+              variant="secondary"
+              size="sm"
+              onClick={() => void onGenerate()}
+            >
+              <RotateCcw className="h-4 w-4" aria-hidden="true" />
+              重试
+            </Button>
+          </span>
+        </StatusNote>
+      ) : null}
+
+      {gen.status === "done" && gen.entities.length === 0 ? (
+        <EmptyState
+          icon={Globe2}
+          title="本次未生成可用实体"
+          description="可换一个更具体的设定方向，或补充世界的硬规则与边界后再试。"
+          action={
+            <Button
+              type="button"
+              variant="primary"
+              size="sm"
+              onClick={() => void onGenerate()}
+              disabled={brief.trim().length === 0}
+            >
+              <Sparkles className="h-4 w-4" aria-hidden="true" />
+              重新生成
+            </Button>
+          }
+        />
+      ) : null}
+
       {gen.status === "done" && gen.entities.length > 0 ? (
         <div className="flex flex-col gap-3">
           <StatusNote variant="info">