feat: Implement message check-in and status management, introduce flexible interval units, and add decryption routes for messages and attachments.

src/app/api/messages/[messageId]/route.ts

@@ -16,7 +16,7 @@ export async function PATCH(
 
   try {
     const body = await req.json();
-    const { title, content, recipients, checkInterval, isEncrypted } = body;
+    const { title, content, recipients, checkInterval, intervalUnit, isEncrypted } = body;
 
     const existingMessage = await prisma.message.findUnique({
       where: { id: messageId, userId: session.user.id },
@@ -40,6 +40,7 @@ export async function PATCH(
         title,
         content,
         checkInterval,
+        intervalUnit: intervalUnit || existingMessage.intervalUnit,
         isEncrypted: isEncrypted || existingMessage.isEncrypted,
         recipients: {
           create: recipients.map((email: string) => ({ email })),