Fixed the Manager deployment database dependency.

Root cause
src/proxy.ts statically imported installation-state.ts, which statically imported Prisma. Additionally, the root layout statically imported business branding, which also loads Prisma. The pathname check was also incorrect for Manager deployments served at /.

src/app/layout.tsx

@@ -1,7 +1,6 @@
 import type { Metadata, Viewport } from "next";
 import { Inter } from "next/font/google";
 import { Providers } from "@/components/providers";
-import { getBranding } from "@/lib/business/branding";
 import "./globals.css";
 
 const inter = Inter({
@@ -18,6 +17,13 @@ const inter = Inter({
  * than "NextChair" (see that file's own fallback-order comment).
  */
 export async function generateMetadata(): Promise<Metadata> {
+  if (process.env.MANAGER_MODE === "true") {
+    return {
+      title: { default: "NextChair Manager", template: "%s | NextChair Manager" },
+      description: "Manage NextChair business deployments.",
+    };
+  }
+  const { getBranding } = await import("@/lib/business/branding");
   const branding = await getBranding();
 
   return {
@@ -41,6 +47,17 @@ export async function generateMetadata(): Promise<Metadata> {
 }
 
 export async function generateViewport(): Promise<Viewport> {
+  if (process.env.MANAGER_MODE === "true") {
+    return {
+      width: "device-width",
+      initialScale: 1,
+      maximumScale: 1,
+      userScalable: false,
+      viewportFit: "cover",
+      themeColor: "#111b15",
+    };
+  }
+  const { getBranding } = await import("@/lib/business/branding");
   const branding = await getBranding();
   return {
     width: "device-width",