fix: resolve all Biome lint errors

app/api/generate-topic/route.ts

@@ -1,6 +1,6 @@
 import { getOpenAIClient } from "@/lib/openai";
-import OpenAI from "openai";
 import { NextResponse } from "next/server";
+import OpenAI from "openai";
 
 export async function POST() {
   try {

app/api/score-idea/route.ts

@@ -1,7 +1,7 @@
-import { getOpenAIClient } from "@/lib/openai";
 import { insertGameScore } from "@/lib/game-scores";
-import OpenAI from "openai";
+import { getOpenAIClient } from "@/lib/openai";
 import { type NextRequest, NextResponse } from "next/server";
+import OpenAI from "openai";
 
 const SCORE_FUNCTION: OpenAI.Chat.Completions.ChatCompletionTool = {
   type: "function",

app/error.tsx

@@ -11,7 +11,7 @@ interface ErrorProps {
  * Global error boundary — catches unhandled errors in the React tree.
  * Must be a Client Component.
  */
-export default function Error({ error, reset }: ErrorProps) {
+export default function AppError({ error, reset }: ErrorProps) {
   useEffect(() => {
     console.error("[Error boundary]", error);
   }, [error]);

lib/env.ts

@@ -9,9 +9,7 @@ const required = ["NEXT_PUBLIC_SUPABASE_URL", "NEXT_PUBLIC_SUPABASE_ANON_KEY"] a
 for (const key of required) {
   if (!process.env[key]) {
     throw new Error(
-      `Missing required environment variable: ${key}\n` +
-        `Copy .env.example to .env.local and fill in your Supabase credentials.\n` +
-        `  cp .env.example .env.local`,
+      `Missing required environment variable: ${key}\nCopy .env.example to .env.local and fill in your Supabase credentials.\n  cp .env.example .env.local`,
     );
   }
 }

lib/supabase/client.ts

@@ -8,7 +8,7 @@ import { createBrowserClient } from "@supabase/ssr";
  */
 export function createClient() {
   return createBrowserClient(
-    process.env.NEXT_PUBLIC_SUPABASE_URL!,
-    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    process.env.NEXT_PUBLIC_SUPABASE_URL ?? "",
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY ?? "",
   );
 }

lib/supabase/middleware.ts

@@ -9,8 +9,8 @@ export async function updateSession(request: NextRequest) {
   let supabaseResponse = NextResponse.next({ request });
 
   const supabase = createServerClient(
-    process.env.NEXT_PUBLIC_SUPABASE_URL!,
-    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    process.env.NEXT_PUBLIC_SUPABASE_URL ?? "",
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY ?? "",
     {
       cookies: {
         getAll() {

lib/supabase/server.ts

@@ -9,8 +9,8 @@ export async function createClient() {
   const cookieStore = await cookies();
 
   return createServerClient(
-    process.env.NEXT_PUBLIC_SUPABASE_URL!,
-    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    process.env.NEXT_PUBLIC_SUPABASE_URL ?? "",
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY ?? "",
     {
       cookies: {
         getAll() {

tests/lib/env.test.ts

@@ -23,7 +23,7 @@ describe("lib/env", () => {
   });
 
   it("throws when NEXT_PUBLIC_SUPABASE_URL is missing", async () => {
-    delete process.env.NEXT_PUBLIC_SUPABASE_URL;
+    process.env.NEXT_PUBLIC_SUPABASE_URL = undefined;
     process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY = "test-anon-key";
 
     await expect(import("@/lib/env")).rejects.toThrow(
@@ -33,7 +33,7 @@ describe("lib/env", () => {
 
   it("throws when NEXT_PUBLIC_SUPABASE_ANON_KEY is missing", async () => {
     process.env.NEXT_PUBLIC_SUPABASE_URL = "https://test.supabase.co";
-    delete process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY;
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY = undefined;
 
     await expect(import("@/lib/env")).rejects.toThrow(
       "Missing required environment variable: NEXT_PUBLIC_SUPABASE_ANON_KEY",

vitest.config.ts

@@ -1,4 +1,4 @@
-import path from "path";
+import path from "node:path";
 import react from "@vitejs/plugin-react";
 import { defineConfig } from "vitest/config";