fix(web): migrate client env variables to T3 Env

Ultra-worked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Author: gracefullight

apps/web/src/app/providers.tsx

@@ -6,16 +6,16 @@ import { Provider as JotaiProvider } from "jotai";
 import dynamic from "next/dynamic";
 import { type AbstractIntlMessages, NextIntlClientProvider } from "next-intl";
 import type { ReactNode } from "react";
+import { env } from "@/config/env";
 import { getQueryClient } from "@/lib/get-query-client";
 
-const ENABLE_DEVTOOLS = process.env.NEXT_PUBLIC_ENABLE_DEVTOOLS === "true";
-
-const TanStackDevTools = ENABLE_DEVTOOLS
-  ? dynamic(
-      () => import("@/components/devtools/tanstack-devtools").then((mod) => mod.TanStackDevTools),
-      { ssr: false }
-    )
-  : () => null;
+const TanStackDevTools =
+  env.NEXT_PUBLIC_ENABLE_DEVTOOLS === "true"
+    ? dynamic(
+        () => import("@/components/devtools/tanstack-devtools").then((mod) => mod.TanStackDevTools),
+        { ssr: false }
+      )
+    : () => null;
 
 interface ProvidersProps {
   children: ReactNode;

apps/web/src/lib/auth-client.ts

@@ -1,7 +1,8 @@
 import { createAuthClient } from "better-auth/react";
+import { env } from "@/config/env";
 
 export const authClient = createAuthClient({
-  baseURL: process.env.NEXT_PUBLIC_BETTER_AUTH_URL || "http://localhost:3000",
+  baseURL: env.NEXT_PUBLIC_BETTER_AUTH_URL,
 });
 
 export const { useSession, signIn, signOut } = authClient;