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/(app)/settings/ai/page.tsx

@@ -6,7 +6,7 @@ import { ByokManager } from "@/components/settings/byok-manager";
 import { ModelPrefsForm } from "@/components/settings/model-prefs-form";
 import { getMessages } from "@/lib/i18n/server";
 
-export const metadata: Metadata = { title: "AI & Models – Settings" };
+export const metadata: Metadata = {};
 
 export default async function AiSettingsPage() {
   const session = await auth.api.getSession({ headers: await headers() });