fix(users): allow deleting guest users with dependent records

lib/db/queries.ts

@@ -50,6 +50,8 @@ import {
   loginToken,
   generatedImage,
   pointsLedger,
+  tutorialVideos,
+  messageDeprecated,
 } from "./schema";
 import { generateHashedPassword } from "./utils";
 import {
@@ -107,7 +109,7 @@ export async function createGuestUser() {
   const password = generateHashedPassword(generateUUID());
 
   try {
-    return await db.insert(user).values({ email, password }).returning({
+    return await db.insert(user).values({ email, password, role: "guest" }).returning({
       id: user.id,
       email: user.email,
     });
@@ -909,7 +911,39 @@ export async function updateUser({
 
 export async function deleteUserById({ id }: { id: string }) {
   try {
-    return await db.delete(user).where(eq(user.id, id)).returning();
+    return await db.transaction(async (tx) => {
+      const userChats = await tx
+        .select({ id: chat.id })
+        .from(chat)
+        .where(eq(chat.userId, id));
+      const chatIds = userChats.map((row) => row.id);
+
+      if (chatIds.length > 0) {
+        await tx.delete(vote).where(inArray(vote.chatId, chatIds));
+        await tx.delete(message).where(inArray(message.chatId, chatIds));
+        await tx.delete(messageDeprecated).where(inArray(messageDeprecated.chatId, chatIds));
+        await tx.delete(stream).where(inArray(stream.chatId, chatIds));
+      }
+
+      await tx.delete(chat).where(eq(chat.userId, id));
+      await tx.delete(suggestion).where(eq(suggestion.userId, id));
+      await tx.delete(document).where(eq(document.userId, id));
+      await tx.delete(generatedImage).where(eq(generatedImage.userId, id));
+
+      // 清理“操作人/更新人”外键引用，避免删除被阻塞
+      await tx.update(pointsLedger).set({ createdBy: null }).where(eq(pointsLedger.createdBy, id));
+      await tx.update(generatedImage).set({ featuredBy: null }).where(eq(generatedImage.featuredBy, id));
+      await tx.update(aiProvider).set({ updatedBy: null }).where(eq(aiProvider.updatedBy, id));
+      await tx.update(storageConfig).set({ updatedBy: null }).where(eq(storageConfig.updatedBy, id));
+      await tx.update(systemSettings).set({ updatedBy: null }).where(eq(systemSettings.updatedBy, id));
+      await tx.update(toolConfig).set({ updatedBy: null }).where(eq(toolConfig.updatedBy, id));
+      await tx.update(siteSettings).set({ updatedBy: null }).where(eq(siteSettings.updatedBy, id));
+      await tx.update(authSettings).set({ updatedBy: null }).where(eq(authSettings.updatedBy, id));
+      await tx.update(navLinks).set({ createdBy: null }).where(eq(navLinks.createdBy, id));
+      await tx.update(tutorialVideos).set({ createdBy: null }).where(eq(tutorialVideos.createdBy, id));
+
+      return await tx.delete(user).where(eq(user.id, id)).returning();
+    });
   } catch (_error) {
     throw new ChatSDKError("bad_request:database", "Failed to delete user");
   }