refactor(web): use env var for Playwright port configuration

Use NEXT_PUBLIC_WEB_PORT env var in Playwright config instead of hardcoding
port 3001. This allows Playwright to use the same port as the dev server
and prevents conflicts when running tests locally.

Also removed E2E_ENABLE_QUERY_FIXTURE env var since we removed that logic
from production code in favor of Playwright's route mocking.

Author: brandonkachen

web/playwright.config.ts

@@ -1,5 +1,9 @@
 import { defineConfig, devices } from '@playwright/test'
 
+// Use the same port as the dev server, defaulting to 3000
+const PORT = process.env.NEXT_PUBLIC_WEB_PORT || '3000'
+const BASE_URL = `http://127.0.0.1:${PORT}`
+
 export default defineConfig({
   testDir: './src/__tests__/e2e',
   fullyParallel: true,
@@ -8,7 +12,7 @@ export default defineConfig({
   workers: process.env.CI ? 1 : undefined,
   reporter: 'html',
   use: {
-    baseURL: 'http://127.0.0.1:3001',
+    baseURL: BASE_URL,
     trace: 'on-first-retry',
   },
 
@@ -28,11 +32,8 @@ export default defineConfig({
   ],
 
   webServer: {
-    command: 'NEXT_PUBLIC_WEB_PORT=3001 bun run dev',
-    url: 'http://127.0.0.1:3001',
+    command: `NEXT_PUBLIC_WEB_PORT=${PORT} bun run dev`,
+    url: BASE_URL,
     reuseExistingServer: !process.env.CI,
-    env: {
-      E2E_ENABLE_QUERY_FIXTURE: '1',
-    },
   },
 })