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_Frontend/src/pages/Auth/LoginForm.jsx

@@ -0,0 +1,62 @@
+// src/pages/Auth/LoginForm.jsx
+// Bejelentkezési űrlap
+
+import InputBox from "../../components/Inputs/InputBox";
+import Button from "../../components/Buttons/Button";
+import { motion } from "framer-motion";
+import { useState } from "react";
+
+export default function LoginForm() {
+  const [email, setEmail] = useState("");
+  const [password, setPassword] = useState("");
+  const [error, setError] = useState("");
+
+  function validateEmail(email) {
+    return /\S+@\S+\.\S+/.test(email);
+  }
+
+  const handleSubmit = (e) => {
+    e.preventDefault();
+    setError("");
+    if (!email || !password) {
+      setError("Minden mező kitöltése kötelező.");
+      return;
+    }
+    if (!validateEmail(email)) {
+      setError("Hibás email formátum.");
+      return;
+    }
+    // Backend API
+    console.log("Bejelentkezés:", { email, password });
+  };
+
+  return (
+    <motion.div
+      key="login"
+      initial={{ opacity: 0 }}
+      animate={{ opacity: 1 }}
+      exit={{ opacity: 0 }}
+      transition={{ duration: 0.25 }}
+    >
+      <h2 className="text-4xl font-extrabold text-center mb-6 text-gray-800 tracking-wide">Bejelentkezés</h2>
+      {error && (
+        <div className="mb-4 text-red-600 text-center font-semibold">{error}</div>
+      )}
+      <form onSubmit={handleSubmit} className="space-y-6">
+        <InputBox
+          type="email"
+          placeholder="Email cím"
+          value={email}
+          onChange={e => setEmail(e.target.value)}
+        />
+        <InputBox
+          type="password"
+          placeholder="Jelszó"
+          value={password}
+          onChange={e => setPassword(e.target.value)}
+        />
+        <Button text="Bejelentkezés" type="submit" />
+      </form>
+    </motion.div>
+  );
+}