fix: browser tab title should always just say "Epicure"

Root layout used title.template ("%s | Epicure") and 38 pages set
their own title, producing "Recipes | Epicure", "Messages — Epicure",
etc. Drop the template, set a flat "Epicure" default, and clear every
page's title override so they all inherit it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/admin/users/[id]/page.tsx

@@ -10,7 +10,7 @@ import { ResetUsageButton } from "@/components/admin/reset-usage-button";
 import Link from "next/link";
 import { ArrowLeft } from "lucide-react";
 
-export const metadata: Metadata = { title: "User Detail" };
+export const metadata: Metadata = {};
 
 interface PageProps {
   params: Promise<{ id: string }>;

apps/web/app/admin/users/page.tsx

@@ -7,7 +7,7 @@ import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
 import { CreateUserDialog } from "@/components/admin/create-user-dialog";
 import Link from "next/link";
 
-export const metadata: Metadata = { title: "User Management" };
+export const metadata: Metadata = {};
 
 const ROLE_COLORS = {
   user: "secondary",