feat: swap Google Fonts for local fonts + fix Suspense boundary

- Replace next/font/google with next/font/local for Inter and Merriweather
- Add self-hosted font files to public/fonts/
- Wrap useSearchParams in Suspense boundary for /chat page
- Eliminates Turbopack TLS font loading issues during build

src/app/(session)/chat/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useEffect, useState } from 'react';
+import { useEffect, useState, Suspense } from 'react';
 import { useSearchParams, useRouter } from 'next/navigation';
 import { ChatWindow } from '@/components/features/chat/chat-window';
 import { ChatInput } from '@/components/features/chat/chat-input';
@@ -11,7 +11,7 @@ import Link from "next/link";
 import { LLMService } from '@/services/llm-service';
 import { ProviderManagementService } from '@/services/provider-management-service';
 
-export default function ChatPage() {
+function ChatPageContent() {
     const { resetSession, phase } = useChatStore();
     const searchParams = useSearchParams();
     const router = useRouter();
@@ -90,3 +90,16 @@ export default function ChatPage() {
         </div>
     );
 }
+
+export default function ChatPage() {
+    return (
+        <Suspense fallback={
+            <div className="flex flex-col h-dvh bg-background items-center justify-center">
+                <Loader2 className="w-8 h-8 animate-spin text-indigo-500" />
+            </div>
+        }>
+            <ChatPageContent />
+        </Suspense>
+    );
+}
+

src/app/layout.tsx

@@ -1,19 +1,24 @@
 import type { Metadata } from "next";
-import { Inter, Merriweather } from "next/font/google";
+import localFont from "next/font/local";
 import "./globals.css";
 import { OfflineIndicator } from "../components/features/common";
 import { InstallPrompt } from "../components/features/pwa/install-prompt";
 import { ThemeProvider } from "@/components/theme-provider";
 
-const inter = Inter({
+const inter = localFont({
+  src: "../../public/fonts/Inter-VariableFont.woff2",
   variable: "--font-inter",
-  subsets: ["latin"],
+  display: "swap",
 });
 
-const merriweather = Merriweather({
+const merriweather = localFont({
+  src: [
+    { path: "../../public/fonts/Merriweather-Light.woff2", weight: "300", style: "normal" },
+    { path: "../../public/fonts/Merriweather-Regular.woff2", weight: "400", style: "normal" },
+    { path: "../../public/fonts/Merriweather-Bold.woff2", weight: "700", style: "normal" },
+    { path: "../../public/fonts/Merriweather-Black.woff2", weight: "900", style: "normal" },
+  ],
   variable: "--font-merriweather",
-  subsets: ["latin"],
-  weight: ["300", "400", "700", "900"],
   display: "swap",
 });