Revert "initial NextChair Manager."

This reverts commit b219fb4519.

src/proxy.ts

@@ -21,7 +21,6 @@ const PROTECTED_PREFIXES = ["/staff", "/owner"];
 // business data guard themselves (see /api/health and
 // /api/cron/process-notifications).
 const INSTALL_EXEMPT_PREFIXES = [
-  "/manager",
   "/install",
   "/offline",
   "/manifest.webmanifest",
@@ -91,10 +90,7 @@ export default auth(async (req) => {
   const isInstallExempt = INSTALL_EXEMPT_PREFIXES.some(
     (prefix) => pathname === prefix || pathname.startsWith(prefix.endsWith("/") ? prefix : `${prefix}/`),
   );
-  // The platform Manager is a separate deployment and deliberately has no
-  // business database. Its own session guard runs inside /manager pages/API.
-  const isManagerPath = pathname === "/manager" || pathname.startsWith("/manager/");
-  const installed = isManagerPath ? true : await isInstalledForRequest();
+  const installed = await isInstalledForRequest();
 
   if (!installed && !isInstallExempt) {
     const response = NextResponse.redirect(new URL("/install", req.nextUrl.origin));