Backend Complete: Interface Refactoring & Service Container Enhancements

Repository Interface Optimization:
- Created IBaseRepository.ts and IPaginatedRepository.ts
- Refactored all 7 repository interfaces to extend base interfaces
- Eliminated ~200 lines of redundant code (70% reduction)
- Improved type safety and maintainability

 Dependency Injection Improvements:
- Added EmailService and GameTokenService to DIContainer
- Updated CreateUserCommandHandler constructor for DI
- Updated RequestPasswordResetCommandHandler constructor for DI
- Enhanced testability and service consistency

 Environment Configuration:
- Created comprehensive .env.example with 40+ variables
- Organized into 12 logical sections (Database, Security, Email, etc.)
- Added security guidelines and best practices
- Documented all backend environment requirements

 Documentation:
- Added comprehensive codebase review
- Created refactoring summary report
- Added frontend implementation guide

Impact: Improved code quality, reduced maintenance overhead, enhanced developer experience

SerpentRace_Backend/src/Application/User/commands/RequestPasswordResetCommandHandler.ts

@@ -0,0 +1,68 @@
+
+import { RequestPasswordResetCommand } from './RequestPasswordResetCommand';
+import { IUserRepository } from '../../../Domain/IRepository/IUserRepository';
+import { EmailService } from '../../Services/EmailService';
+import { TokenService } from '../../Services/TokenService';
+import { logAuth, logWarning, logError } from '../../Services/Logger';
+
+export class RequestPasswordResetCommandHandler  {
+  constructor(
+    private userRepo: IUserRepository,
+    private emailService: EmailService
+  ) {}
+
+  async execute(cmd: RequestPasswordResetCommand): Promise<boolean> {
+    try {
+      if (!cmd.email) {
+        throw new Error('Email is required');
+      }
+
+      // Find user by email
+      const user = await this.userRepo.findByEmail(cmd.email);
+
+      if (!user) {
+        // Don't reveal if user exists or not for security reasons
+        // Still return true but don't send email
+        logAuth(`Password reset requested for non-existent email: ${cmd.email}`);
+        return true;
+      }
+
+      // Generate password reset token
+      const resetTokenData = TokenService.generatePasswordResetToken();
+      
+      // Update user with reset token
+      user.token = await TokenService.hashToken(resetTokenData.token);
+      user.TokenExpires = resetTokenData.expiresAt;
+
+      await this.userRepo.update(user.id, user);
+
+      // Send password reset email
+      try {
+        const baseUrl = process.env.APP_BASE_URL || 'http://localhost:3000';
+        const resetUrl = TokenService.generatePasswordResetUrl(baseUrl, resetTokenData.token);
+        
+        const emailSent = await this.emailService.sendPasswordResetEmail(
+          user.email,
+          `${user.fname} ${user.lname}`,
+          resetTokenData.token,
+          resetUrl
+        );
+        
+        if (!emailSent) {
+          logWarning(`Failed to send password reset email to ${user.email}`);
+          // Don't throw error - request should still succeed even if email fails
+        } else {
+          logAuth(`Password reset email sent successfully to ${user.email}`);
+        }
+      } catch (emailError) {
+        logError('Error sending password reset email', emailError instanceof Error ? emailError : new Error(String(emailError)));
+        // Don't throw error - request should still succeed even if email fails
+      }
+
+      return true;
+    } catch (error) {
+      logError('Password reset request error', error instanceof Error ? error : new Error(String(error)));
+      throw error;
+    }
+  }
+}