feat(phase-06): merge references into additional_kwargs.files with soft-fail

frontend/src/core/threads/hooks.ts

@@ -5,7 +5,9 @@ import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { useCallback, useEffect, useRef, useState } from "react";
 import { toast } from "sonner";
 
-import type { PromptInputMessage } from "@/components/ai-elements/prompt-input";
+import type {
+  PromptInputMessage,
+} from "@/components/ai-elements/prompt-input";
 
 import { getAPIClient } from "../api";
 import { getBackendBaseURL } from "../config";
@@ -17,6 +19,7 @@ import type { UploadedFileInfo } from "../uploads";
 import { uploadFiles } from "../uploads";
 import type { UploadTarget } from "../uploads/api";
 
+import { buildFilesForSubmit } from "./submit-files";
 import type {
   AgentThread,
   AgentThreadContext,
@@ -549,15 +552,14 @@ export function useThreadStream({
           }
         }
 
-        // Build files metadata for submission (included in additional_kwargs)
-        const filesForSubmit: FileInMessage[] = uploadedFileInfo.map(
-          (info) => ({
-            filename: info.filename,
-            size: info.size,
-            path: info.virtual_path,
-            status: "uploaded" as const,
-          }),
+        // Build files metadata for submission (single envelope for uploads + references)
+        const { files: filesForSubmit, staleCount } = buildFilesForSubmit(
+          uploadedFileInfo,
+          message.references,
         );
+        if (staleCount > 0) {
+          toast.error("部分引用已失效，已自动移除");
+        }
 
         await thread.submit(
           {
@@ -663,7 +665,10 @@ export function useSubmitThread({
       const text = message.text.trim();
 
       const hasFiles = !!(message.files && message.files.length > 0);
-      if (!text && !hasFiles) {
+      const hasReferences = !!(
+        message.references && message.references.length > 0
+      );
+      if (!text && !hasFiles && !hasReferences) {
         return;
       }
 
@@ -709,6 +714,14 @@ export function useSubmitThread({
         }
       }
 
+      const { files: filesForSubmit, staleCount } = buildFilesForSubmit(
+        [],
+        message.references,
+      );
+      if (staleCount > 0) {
+        toast.error("部分引用已失效，已自动移除");
+      }
+
       await thread.submit(
         {
           messages: [
@@ -720,6 +733,8 @@ export function useSubmitThread({
                   text,
                 },
               ],
+              additional_kwargs:
+                filesForSubmit.length > 0 ? { files: filesForSubmit } : {},
             },
           ] as Message[],
         },