feat: add delete function for single email message

app/api/emails/[id]/[messageId]/route.ts

@@ -5,6 +5,56 @@ import { and, eq } from "drizzle-orm"
 import { getUserId } from "@/lib/apiKey"
 export const runtime = "edge"
 
+export async function DELETE(
+    request: Request,
+    { params }: { params: Promise<{ id: string; messageId: string }> }
+) {
+  const userId = await getUserId()
+
+  try {
+    const db = createDb()
+    const { id, messageId } = await params
+    const email = await db.query.emails.findFirst({
+      where: and(
+          eq(emails.id, id),
+          eq(emails.userId, userId!)
+      )
+    })
+
+    if (!email) {
+      return NextResponse.json(
+          { error: "Email not found or no permission to view" },
+          { status: 403 }
+      )
+    }
+
+    const message = await db.query.messages.findFirst({
+      where: and(
+          eq(messages.emailId, id),
+          eq(messages.id, messageId)
+      )
+    })
+
+    if(!message) {
+      return NextResponse.json(
+          { error: "Message not found or already deleted" },
+          { status: 404 }
+      )
+    }
+
+    await db.delete(messages)
+        .where(eq(messages.id, messageId))
+
+    return NextResponse.json({ success: true })
+  } catch (error) {
+    console.error('Failed to delete email:', error)
+    return NextResponse.json(
+        { error: "Failed to delete message" },
+        { status: 500 }
+    )
+  }
+}
+
 export async function GET(_request: Request, { params }: { params: Promise<{ id: string; messageId: string }> }) {
   try {
     const { id, messageId } = await params