Detailing fungsi semua modul dari bugs error

database/migrations/2026_06_04_195507_create_exams_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up()
+    {
+        Schema::create('exams', function (Blueprint $table) {
+            $table->id();
+            $table->string('title');
+            $table->text('description')->nullable();
+            
+            // Mengakomodasi 3 jenis training sesuai permintaan Anda
+            $table->enum('training_type', ['matrix_plant', 'product', 'external']);
+            
+            // Relasi ke Materi/Subject (Satu ujian bisa mewakili satu materi SOP)
+            $table->foreignId('subject_id')->constrained()->onDelete('cascade');
+            
+            // Aturan CBT
+            $table->integer('duration_minutes')->default(60); // Durasi ujian
+            $table->integer('passing_grade')->default(80);    // Nilai standar kelulusan
+            $table->integer('max_retakes')->default(1);       // Kesempatan remedial (1 = bisa remedial 1x)
+            $table->boolean('is_random_order')->default(true); // Opsi acak soal antar peserta
+            $table->boolean('is_active')->default(true);
+            
+            $table->timestamps();
+        });
+    }
+
+    public function down()
+    {
+        Schema::dropIfExists('exams');
+    }
+};

database/migrations/2026_06_04_195518_create_exam_assignments_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up()
+    {
+        Schema::create('exam_assignments', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('user_id'); // Karyawan yang ditugaskan
+            $table->foreignId('exam_id')->constrained()->onDelete('cascade');
+            
+            $table->dateTime('deadline_date'); // Batas akhir pengerjaan
+            
+            // Status pengerjaan
+            $table->enum('status', ['pending', 'in_progress', 'passed', 'failed'])->default('pending');
+            
+            $table->timestamps();
+
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
+        });
+    }
+
+    public function down()
+    {
+        Schema::dropIfExists('exam_assignments');
+    }
+};

database/migrations/2026_06_04_195523_create_exam_attempts_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up()
+    {
+        Schema::create('exam_attempts', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('exam_assignment_id')->constrained()->onDelete('cascade'); // Link ke penugasan
+            
+            $table->integer('attempt_number')->default(1); // Percobaan ke-1, ke-2 (remedial), dst
+            $table->decimal('final_score', 5, 2)->nullable(); // Nilai akhir (0-100)
+            
+            $table->enum('status', ['ongoing', 'completed'])->default('ongoing');
+            
+            $table->dateTime('started_at');
+            $table->dateTime('completed_at')->nullable();
+            
+            $table->timestamps();
+        });
+    }
+
+    public function down()
+    {
+        Schema::dropIfExists('exam_attempts');
+    }
+};

database/migrations/2026_06_04_200526_add_essay_keywords_to_question_banks_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up()
+    {
+        Schema::table('question_banks', function (Blueprint $table) {
+            // Menandai jenis soal (default 'multiple_choice' agar data lama Anda tetap aman)
+            if (!Schema::hasColumn('question_banks', 'question_type')) {
+                $table->enum('question_type', ['multiple_choice', 'essay'])->default('multiple_choice')->after('id');
+            }
+            
+            // Menyimpan kata kunci wajib untuk soal esai (pisahkan dengan koma)
+            if (!Schema::hasColumn('question_banks', 'essay_keywords')) {
+                $table->text('essay_keywords')->nullable()->after('question_type');
+            }
+        });
+    }
+
+    public function down()
+    {
+        Schema::table('question_banks', function (Blueprint $table) {
+            $table->dropColumn(['question_type', 'essay_keywords']);
+        });
+    }
+};

database/migrations/2026_06_05_125521_create_exam_answers_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up()
+    {
+        Schema::create('exam_answers', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('exam_attempt_id')->constrained('exam_attempts')->cascadeOnDelete();
+            $table->foreignId('question_id')->constrained('question_banks')->cascadeOnDelete();
+            
+            // Snapshot tipe soal (berjaga-jaga jika master soal diubah setelah ujian selesai)
+            $table->string('question_type', 50)->nullable(); 
+
+            // Jawaban peserta (bisa teks esai, atau huruf opsi A/B/C/D)
+            $table->longText('student_answer')->nullable(); 
+
+            // Pengecekan Sistem Otomatis (True jika PG benar, False jika salah)
+            $table->boolean('is_correct')->nullable(); 
+
+            // --- SISTEM PENILAIAN HYBRID ---
+            // Nilai hitungan mesin/sistem (bisa dari cocoknya kunci jawaban atau deteksi keyword)
+            $table->decimal('auto_score', 8, 2)->default(0); 
+            
+            // Poin tambahan/pengurangan dari koreksi manual oleh Trainer
+            $table->decimal('manual_score', 8, 2)->default(0); 
+            
+            // Total nilai mutlak untuk 1 soal ini (auto_score + manual_score)
+            $table->decimal('final_score', 8, 2)->default(0); 
+
+            // Feedback/Catatan dari trainer khusus untuk jawaban ini
+            $table->text('trainer_notes')->nullable(); 
+
+            // Siapa trainer yang menilai soal ini (jika manual)
+            $table->unsignedBigInteger('graded_by')->nullable(); 
+            $table->timestamp('graded_at')->nullable();
+
+            // --- FUTURE PROOFING ---
+            // Kolom JSON super fleksibel untuk menyimpan data apapun di masa depan
+            // (contoh: log pindah tab browser, durasi waktu spesifik di soal ini, dll)
+            $table->json('metadata')->nullable(); 
+
+            $table->timestamps();
+        });
+    }
+
+    public function down()
+    {
+        Schema::dropIfExists('exam_answers');
+    }
+};