fix: resolve build failures

- Fix TypeScript type error in deleteInvoice server action (returned
  {message: string} instead of void, incompatible with form action type)
- Add export const dynamic = "force-dynamic" to dashboard pages that
  make DB calls at build time (/dashboard, /dashboard/invoices,
  /dashboard/invoices/create) to prevent failed static prerendering
- Fix import order in customers/page.tsx (export before import was invalid)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/dashboard/(overview)/page.tsx

@@ -10,6 +10,8 @@ import {
   RevenueChartSkeleton,
 } from "@/app/ui/skeletons";
 
+export const dynamic = "force-dynamic";
+
 export const metadata: Metadata = {
   title: "Dashboard",
 };

app/dashboard/customers/page.tsx

@@ -1,9 +1,9 @@
-export default function Page() {
-  return <p>Customers Page</p>;
-}
-
 import type { Metadata } from "next";
 
 export const metadata: Metadata = {
   title: "Customers",
 };
+
+export default function Page() {
+  return <p>Customers Page</p>;
+}

app/dashboard/invoices/create/page.tsx

@@ -3,6 +3,8 @@ import { fetchCustomers } from "@/app/lib/data";
 import Breadcrumbs from "@/app/ui/invoices/breadcrumbs";
 import Form from "@/app/ui/invoices/create-form";
 
+export const dynamic = "force-dynamic";
+
 export const metadata: Metadata = {
   title: "Create invoices",
 };

app/dashboard/invoices/page.tsx

@@ -8,6 +8,8 @@ import Table from "@/app/ui/invoices/table";
 import Search from "@/app/ui/search";
 import { InvoicesTableSkeleton } from "@/app/ui/skeletons";
 
+export const dynamic = "force-dynamic";
+
 export const metadata: Metadata = {
   title: "Invoices",
 };

app/lib/actions.ts

@@ -103,7 +103,7 @@ export async function updateInvoice(
   redirect("/dashboard/invoices");
 }
 
-export async function deleteInvoice(id: string) {
+export async function deleteInvoice(id: string): Promise<void> {
   // throw new Error('Failed to Delete Invoice. ')
   try {
     await sql`
@@ -111,11 +111,8 @@ export async function deleteInvoice(id: string) {
       WHERE id = ${id}
       `;
     revalidatePath("/dashboard/invoices");
-    return { message: "Deleted Invoice. " };
   } catch (_error) {
-    return {
-      message: "Database Error: Failed while deleting record from Invoice. ",
-    };
+    console.error("Database Error: Failed while deleting record from Invoice.");
   }
 }