Incoming filename fixes

apps/bridge-worker/tasks/fetch-signal-messages.ts

@@ -24,8 +24,23 @@ const fetchAttachments = async (attachments: any[] | undefined) => {
       const arrayBuffer = await blob.arrayBuffer();
       const base64Attachment = Buffer.from(arrayBuffer).toString("base64");
 
+      // Generate default filename if not provided by Signal API
+      let defaultFilename = name;
+      if (!defaultFilename) {
+        // Check if id already has an extension
+        const hasExtension = id.includes('.');
+        if (hasExtension) {
+          // ID already includes extension
+          defaultFilename = id;
+        } else {
+          // Add extension based on content type
+          const extension = contentType?.split('/')[1] || 'bin';
+          defaultFilename = `${id}.${extension}`;
+        }
+      }
+
       const formattedAttachment = {
-        filename: name,
+        filename: defaultFilename,
         mimeType: contentType,
         attachment: base64Attachment,
       };
@@ -62,7 +77,7 @@ const processMessage = async ({
   const { attachments } = dataMessage;
   const rawTimestamp = dataMessage?.timestamp;
 
-  logger.debug({ 
+  logger.debug({
     sourceUuid,
     source,
     rawTimestamp,
@@ -160,7 +175,7 @@ const fetchSignalMessagesTask = async ({
       });
       for (const formattedMessage of formattedMessages) {
         if (formattedMessage.to !== formattedMessage.from) {
-          logger.debug({ 
+          logger.debug({
             messageId: formattedMessage.messageId,
             from: formattedMessage.from,
             to: formattedMessage.to,