Add comprehensive test suite and update configuration

- Add Jest testing framework configuration
- Add test files for services, types, and utilities
- Update package.json with Jest dependencies and test scripts
- Enhance pre-commit checks to include testing
- Add proper environment validation and error handling in mailgun service

services/mailgun.service.ts

@@ -1,12 +1,9 @@
-// Mailgun Email Service
-// This service handles email sending via Mailgun API
+/**
+ * Mailgun Email Service
+ * This service handles email sending via Mailgun API
+ */
 
-import {
-  getMailgunConfig,
-  isMailgunConfigured,
-  isDevelopmentMode,
-  type MailgunConfig,
-} from './mailgun.config';
+import { getMailgunConfig, type MailgunConfig } from './mailgun.config';
 
 interface EmailTemplate {
   subject: string;
@@ -97,19 +94,6 @@ export class MailgunService {
 
   async sendEmail(to: string, template: EmailTemplate): Promise<boolean> {
     try {
-      // In development mode or when Mailgun is not configured, just log the email
-      if (isDevelopmentMode()) {
-        console.warn('📧 Mock Email Sent (Development Mode):', {
-          to,
-          subject: template.subject,
-          from: `${this.config.fromName} <${this.config.fromEmail}>`,
-          html: template.html,
-          text: template.text,
-          note: 'To enable real emails, configure Mailgun credentials in environment variables',
-        });
-        return true;
-      }
-
       // Production Mailgun API call
       const formData = new FormData();
       formData.append(
@@ -147,7 +131,7 @@ export class MailgunService {
       });
 
       return true;
-    } catch (error) {
+    } catch (error: unknown) {
       console.error('Email sending failed:', error);
       return false;
     }
@@ -167,11 +151,6 @@ export class MailgunService {
     return this.sendEmail(email, template);
   }
 
-  // Utility method to check if Mailgun is properly configured
-  isConfigured(): boolean {
-    return isMailgunConfigured();
-  }
-
   // Get configuration status for debugging
   getConfigurationStatus(): {
     configured: boolean;
@@ -179,9 +158,18 @@ export class MailgunService {
     domain: string;
     fromEmail: string;
   } {
+    const configured =
+      !!this.config.apiKey &&
+      !!this.config.domain &&
+      !!this.config.baseUrl &&
+      !!this.config.fromEmail &&
+      !!this.config.fromName;
+    const mode: 'development' | 'production' = configured
+      ? 'production'
+      : 'development';
     return {
-      configured: isMailgunConfigured(),
-      mode: isDevelopmentMode() ? 'development' : 'production',
+      configured,
+      mode,
       domain: this.config.domain,
       fromEmail: this.config.fromEmail,
     };