fix:前端修改洋洋在信我最后一次

frontend/app/tools/knowledge/page.tsx

@@ -22,7 +22,16 @@ import {
   Select,
 } from "@/components/admin/ui";
 import { adminApi, errMessage } from "@/lib/admin-api";
-import { buildKnowledgeForm, knowledgeApi, type KnowledgeDocument, type UploadPreview } from "@/lib/knowledge-api";
+import {
+  buildKnowledgeForm,
+  collectionLabel,
+  DEFAULT_KNOWLEDGE_COLLECTION,
+  KNOWLEDGE_COLLECTIONS,
+  knowledgeApi,
+  knowledgeErrorHint,
+  type KnowledgeDocument,
+  type UploadPreview,
+} from "@/lib/knowledge-api";
 import { isAdmin } from "@/lib/roles";
 
 /** 切分策略，与后端 KnowledgeUploadService 支持的策略保持一致。 */
@@ -38,6 +47,7 @@ export default function KnowledgePage() {
 
   const [file, setFile] = useState<File | null>(null);
   const [title, setTitle] = useState("");
+  const [collection, setCollection] = useState<string>(DEFAULT_KNOWLEDGE_COLLECTION);
   const [strategy, setStrategy] = useState("default");
   const [chunkSize, setChunkSize] = useState("");
   const [chunkOverlap, setChunkOverlap] = useState("");
@@ -96,6 +106,7 @@ export default function KnowledgePage() {
     try {
       const result = await knowledgeApi.preview(
         buildKnowledgeForm(file, {
+          collection_name: collection,
           strategy,
           chunk_size: chunkSize ? Number(chunkSize) : null,
           chunk_overlap: chunkOverlap ? Number(chunkOverlap) : null,
@@ -104,7 +115,7 @@ export default function KnowledgePage() {
       setPreview(result);
       if (!title) setTitle(file.name);
     } catch (err) {
-      setError(errMessage(err, "预览失败，请检查文件格式"));
+      setError(knowledgeErrorHint(errMessage(err, "预览失败，请检查文件格式")));
     } finally {
       setUploading(false);
     }
@@ -112,6 +123,11 @@ export default function KnowledgePage() {
 
   const runConfirm = async () => {
     if (!file || uploading) return;
+    // 集合是后端白名单校验的必填项，缺了会直接 400「知识库集合不在允许范围内」
+    if (!collection) {
+      setError("请先选择知识库集合");
+      return;
+    }
     setUploading(true);
     setError(null);
     setNotice(null);
@@ -120,16 +136,17 @@ export default function KnowledgePage() {
         buildKnowledgeForm(file, {
           title: title || file.name,
           doc_id: preview?.doc_id ? String(preview.doc_id) : undefined,
+          collection_name: collection,
           strategy,
           chunk_size: chunkSize ? Number(chunkSize) : null,
           chunk_overlap: chunkOverlap ? Number(chunkOverlap) : null,
         })
       );
-      setNotice(`《${title || file.name}》已入库`);
+      setNotice(`《${title || file.name}》已入库到「${collectionLabel(collection)}」`);
       resetUpload();
       await load();
     } catch (err) {
-      setError(errMessage(err, "入库失败，请稍后重试"));
+      setError(knowledgeErrorHint(errMessage(err, "入库失败，请稍后重试")));
     } finally {
       setUploading(false);
     }
@@ -211,7 +228,7 @@ export default function KnowledgePage() {
                   </span>
                 </div>
 
-                <div className="grid gap-3 sm:grid-cols-3">
+                <div className="grid gap-3 sm:grid-cols-2 xl:grid-cols-4">
                   <label className="space-y-1.5">
                     <span className="text-xs text-slate-500">标题</span>
                     <TextInput
@@ -220,6 +237,25 @@ export default function KnowledgePage() {
                       placeholder="用于检索展示的标题"
                     />
                   </label>
+                  <label className="space-y-1.5">
+                    <span className="text-xs text-slate-500">
+                      知识库集合 <span className="text-rose-500">*</span>
+                    </span>
+                    <Select
+                      value={collection}
+                      onChange={(event) => setCollection(event.target.value)}
+                    >
+                      {KNOWLEDGE_COLLECTIONS.map((item) => (
+                        <option key={item.value} value={item.value}>
+                          {item.label}（{item.value}）
+                        </option>
+                      ))}
+                    </Select>
+                    <span className="block text-[11px] leading-4 text-slate-400">
+                      {KNOWLEDGE_COLLECTIONS.find((item) => item.value === collection)
+                        ?.description ?? "决定文档写入哪个向量集合，入库后不可修改"}
+                    </span>
+                  </label>
                   <label className="space-y-1.5">
                     <span className="text-xs text-slate-500">切分策略</span>
                     <Select
@@ -284,6 +320,7 @@ export default function KnowledgePage() {
                 {preview && (
                   <div className="rounded-lg border border-slate-200 bg-slate-50 p-4">
                     <div className="mb-2 flex flex-wrap items-center gap-2 text-xs text-slate-500">
+                      <Badge tone="info">{collectionLabel(collection)}</Badge>
                       <Badge tone="info">{preview.strategy || strategy}</Badge>
                       {preview.chunk_size != null && <span>分片 {preview.chunk_size}</span>}
                       {preview.chunk_overlap != null && <span>重叠 {preview.chunk_overlap}</span>}
@@ -338,7 +375,11 @@ export default function KnowledgePage() {
                               {item.title ?? item.filename ?? docId}
                             </p>
                             <p className="mt-0.5 flex flex-wrap items-center gap-x-3 gap-y-1 text-xs text-slate-400">
-                              {item.collection_name && <span>{item.collection_name}</span>}
+                              {item.collection_name && (
+                                <span className="rounded bg-slate-100 px-1.5 py-0.5 text-slate-500">
+                                  {collectionLabel(item.collection_name)}
+                                </span>
+                              )}
                               {item.chunk_count != null && <span>{item.chunk_count} 段</span>}
                               {item.create_time && <span>{item.create_time}</span>}
                               <span className="font-mono">{docId}</span>