feat: Add conditional MAIL_HOST validation, lazy-load mailer, and update Gitea workflow to use vars for mail and Sentry environment variables.

lib/env.test.ts

@@ -0,0 +1,60 @@
+import { describe, it, expect } from 'vitest';
+import { envSchema } from './env';
+
+describe('envSchema', () => {
+  it('should allow missing MAIL_HOST in development', () => {
+    const result = envSchema.safeParse({
+      NEXT_PUBLIC_BASE_URL: 'http://localhost:3000',
+      TARGET: 'development',
+    });
+    expect(result.success).toBe(true);
+  });
+
+  it('should require MAIL_HOST in production', () => {
+    const result = envSchema.safeParse({
+      NEXT_PUBLIC_BASE_URL: 'https://example.com',
+      TARGET: 'production',
+    });
+    expect(result.success).toBe(false);
+    if (!result.success) {
+      expect(result.error.issues[0].message).toBe(
+        'MAIL_HOST is required in non-development environments',
+      );
+    }
+  });
+
+  it('should require MAIL_HOST in testing', () => {
+    const result = envSchema.safeParse({
+      NEXT_PUBLIC_BASE_URL: 'https://testing.example.com',
+      TARGET: 'testing',
+    });
+    expect(result.success).toBe(false);
+    if (!result.success) {
+      expect(result.error.issues[0].message).toBe(
+        'MAIL_HOST is required in non-development environments',
+      );
+    }
+  });
+
+  it('should require MAIL_HOST in staging', () => {
+    const result = envSchema.safeParse({
+      NEXT_PUBLIC_BASE_URL: 'https://staging.example.com',
+      TARGET: 'staging',
+    });
+    expect(result.success).toBe(false);
+    if (!result.success) {
+      expect(result.error.issues[0].message).toBe(
+        'MAIL_HOST is required in non-development environments',
+      );
+    }
+  });
+
+  it('should pass if MAIL_HOST is provided in production', () => {
+    const result = envSchema.safeParse({
+      NEXT_PUBLIC_BASE_URL: 'https://example.com',
+      TARGET: 'production',
+      MAIL_HOST: 'smtp.example.com',
+    });
+    expect(result.success).toBe(true);
+  });
+});