Implement Intelligent QCM system with AI-generated plausible distractors

- Transform ContentLoader from hardcoded QCM to AI-powered exercises
- Remove all mock content generators (_generateTextExercise, etc.)
- Add pure AI content generation with 6-option QCM (1 correct + 5 distractors)
- Create intelligent distractors testing common learning mistakes:
  * Text: main idea confusion, partial truths, logical but wrong conclusions
  * Audio: mishearing, speaker confusion, context misunderstanding
  * Image: object similarity, spatial confusion, descriptive errors
  * Grammar: common errors, tense mistakes, wrong constructions
- Reduce random success chance from 25% to 16.7% for better learning assessment
- Make AI mandatory - no fallback without IAEngine availability
- Update CLAUDE.md plan with dual exercise approach documentation
- Fix async/await issues in ContentLoader module loading chain

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -17,14 +17,27 @@ Building a **bulletproof modular system** with strict separation of concerns usi
 - ✅ **Application.js** - Auto-bootstrap system with lifecycle management
 - ✅ **Development Server** - HTTP server with ES6 modules and CORS support
 
-**DRS SYSTEM COMPLETED ✅** - Advanced learning modules with AI integration:
-- ✅ **TextModule** - Reading comprehension exercises with AI text analysis
-- ✅ **AudioModule** - Listening exercises with AI audio comprehension
-- ✅ **ImageModule** - Visual comprehension with AI vision analysis
-- ✅ **GrammarModule** - Grammar exercises with AI linguistic analysis
-- ✅ **AI Integration** - OpenAI → DeepSeek → Disable fallback system
-- ✅ **Persistent Storage** - Progress tracking with timestamps and metadata
-- ✅ **Data Merge System** - Local/external data synchronization
+**DRS SYSTEM COMPLETED ✅** - Advanced learning modules with dual AI approach:
+
+**Core Exercise Generation:**
+- ✅ **ContentLoader** - Pure AI content generation when no real content available
+- ✅ **IAEngine** - Multi-provider AI system (OpenAI → DeepSeek → Disable)
+- ✅ **LLMValidator** - Intelligent answer validation with detailed feedback
+- ✅ **AI Report System** - Session tracking with exportable reports (text/HTML/JSON)
+- ✅ **UnifiedDRS** - Component-based exercise presentation system
+
+**Dual Exercise Modes:**
+- 🔄 **Intelligent QCM** - AI generates questions + 1 correct + 5 plausible wrong answers (16.7% random chance)
+- 🔄 **Open Analysis Modules** - Free-text responses validated by AI with personalized feedback
+  - TextAnalysisModule - Deep comprehension with AI coaching
+  - GrammarAnalysisModule - Grammar correction with explanations
+  - TranslationModule - Translation validation with improvement tips
+  - OpenResponseModule - Free-form questions with intelligent evaluation
+
+**AI Architecture:**
+- ✅ **AI-Mandatory System** - No fallback without AI, ensures quality consistency
+- ✅ **Smart Preview Orchestrator** - Manages AI report sessions and shared services
+- ✅ **Dynamic Content Adaptation** - Real content + AI questions when available, pure AI when not
 
 ## 🔥 Critical Requirements
 

src/Application.js

@@ -201,24 +201,30 @@ class Application {
     async _loadModules() {
         console.log(`🔄 Loading ${this._config.modules.length} modules...`);
 
+        // PHASE 1: Register all modules first
+        console.log('📋 PHASE 1: Registering all modules...');
         for (const moduleConfig of this._config.modules) {
             try {
                 const { name, path, dependencies = [], config = {} } = moduleConfig;
 
-                console.log(`📦 Loading module: ${name} from ${path}`);
+                console.log(`📝 Registering module: ${name} from ${path}`);
 
                 // Dynamically import module
                 const moduleModule = await import(path);
                 const ModuleClass = moduleModule.default;
 
-                // Register and initialize
-                this._moduleLoader.register(name, ModuleClass, dependencies);
-                await this._moduleLoader.loadAndInitialize(name, config);
+                if (!ModuleClass) {
+                    throw new Error(`Module ${name} does not export a default class`);
+                }
 
-                console.log(`✅ Module ${name} loaded and initialized successfully`);
+                // Register only
+                this._moduleLoader.register(name, ModuleClass, dependencies);
+                console.log(`✅ Registered module: ${name} with dependencies: [${dependencies.join(', ')}]`);
 
             } catch (error) {
-                console.error(`❌ Failed to load module ${moduleConfig.name}:`, error);
+                console.error(`❌ Failed to register module ${moduleConfig.name}:`, error);
+                console.error(`❌ Module config was:`, moduleConfig);
+                console.error(`❌ Full error stack:`, error.stack);
 
                 // Emit module load error
                 this._eventBus.emit('app:module-error', {
@@ -227,6 +233,37 @@ class Application {
                 }, 'Application');
             }
         }
+
+        // Show registration status
+        const status = this._moduleLoader.getStatus();
+        console.log(`📊 Registration complete. Registered modules: [${status.registered.join(', ')}]`);
+
+        // PHASE 2: Load and initialize all modules
+        console.log('🚀 PHASE 2: Loading and initializing modules...');
+        for (const moduleConfig of this._config.modules) {
+            try {
+                const { name, config = {} } = moduleConfig;
+
+                console.log(`🔄 Loading and initializing module: ${name}`);
+                await this._moduleLoader.loadAndInitialize(name, config);
+                console.log(`✅ Module ${name} loaded and initialized successfully`);
+
+            } catch (error) {
+                console.error(`❌ Failed to load/initialize module ${moduleConfig.name}:`, error);
+                console.error(`❌ Module config was:`, moduleConfig);
+                console.error(`❌ Full error stack:`, error.stack);
+
+                // Emit module load error
+                this._eventBus.emit('app:module-error', {
+                    module: moduleConfig.name,
+                    error: error.message
+                }, 'Application');
+            }
+        }
+
+        // Final status
+        const finalStatus = this._moduleLoader.getStatus();
+        console.log(`🎯 Module loading complete. Initialized modules: [${finalStatus.initialized.join(', ')}]`);
     }
 
     async _startRouting() {