Revert "Fixed the remaining Manager runtime coupling."

This reverts commit bc45608023.

src/app/manifest.ts

@@ -1,4 +1,5 @@
 import type { MetadataRoute } from "next";
+import { getBranding } from "@/lib/business/branding";
 
 /**
  * Next.js's manifest file convention — auto-served at /manifest.webmanifest
@@ -25,21 +26,6 @@ import type { MetadataRoute } from "next";
 export const dynamic = "force-dynamic";
 
 export default async function manifest(): Promise<MetadataRoute.Manifest> {
-  if (process.env.MANAGER_MODE === "true") {
-    return {
-      name: "NextChair Manager",
-      short_name: "Manager",
-      description: "Manage NextChair business deployments.",
-      start_url: "/manager",
-      scope: "/",
-      display: "standalone",
-      background_color: "#f4f6f4",
-      theme_color: "#111b15",
-      orientation: "portrait-primary",
-      icons: [{ src: "/icons/icon-192.png", sizes: "192x192", type: "image/png" }],
-    };
-  }
-  const { getBranding } = await import("@/lib/business/branding");
   const branding = await getBranding();
   return {
     name: branding.name,