fix: increase image limit of copilot (#7756)

fix AF-1080 AF-1154

packages/backend/server/src/app.ts

@@ -29,7 +29,7 @@ export async function createApp() {
     graphqlUploadExpress({
       // TODO(@darkskygit): dynamic limit by quota maybe?
       maxFileSize: 100 * 1024 * 1024,
-      maxFiles: 5,
+      maxFiles: 32,
     })
   );
 

packages/backend/server/src/plugins/copilot/providers/openai.ts

@@ -233,6 +233,7 @@ export class OpenAIProvider
     options: CopilotChatOptions = {}
   ): AsyncIterable<string> {
     this.checkParams({ messages, model, options });
+
     try {
       const result = await this.instance.chat.completions.create(
         {

packages/backend/server/src/plugins/copilot/session.ts

@@ -283,7 +283,13 @@ export class ChatSessionService {
           docId: true,
           parentSessionId: true,
           messages: {
-            select: { id: true, role: true, content: true, createdAt: true },
+            select: {
+              id: true,
+              role: true,
+              content: true,
+              attachments: true,
+              createdAt: true,
+            },
             orderBy: { createdAt: 'asc' },
           },
           promptName: true,