Refactor code structure and remove redundant changes

lib/env.ts

@@ -0,0 +1,27 @@
+import { z } from 'zod';
+
+const envSchema = z.object({
+  NEXT_PUBLIC_DJANGO_API_URL: z.string().url('NEXT_PUBLIC_DJANGO_API_URL must be a valid URL'),
+  NEXT_PUBLIC_CLOUDFLARE_ACCOUNT_ID: z.string().min(1, 'NEXT_PUBLIC_CLOUDFLARE_ACCOUNT_ID is required'),
+  NEXT_PUBLIC_CLOUDFLARE_IMAGE_URL: z.string().url('NEXT_PUBLIC_CLOUDFLARE_IMAGE_URL must be a valid URL'),
+});
+
+function validateEnv() {
+  try {
+    return envSchema.parse({
+      NEXT_PUBLIC_DJANGO_API_URL: process.env.NEXT_PUBLIC_DJANGO_API_URL,
+      NEXT_PUBLIC_CLOUDFLARE_ACCOUNT_ID: process.env.NEXT_PUBLIC_CLOUDFLARE_ACCOUNT_ID,
+      NEXT_PUBLIC_CLOUDFLARE_IMAGE_URL: process.env.NEXT_PUBLIC_CLOUDFLARE_IMAGE_URL,
+    });
+  } catch (error) {
+    console.error('❌ Invalid environment variables:');
+    if (error instanceof z.ZodError) {
+      error.errors.forEach((err) => {
+        console.error(`  - ${err.path.join('.')}: ${err.message}`);
+      });
+    }
+    throw new Error('Environment validation failed');
+  }
+}
+
+export const env = validateEnv();