feat: add AI interview answer completeness score

[jainiksha]

📌 Description

✨ Added AI Interview Answer Completeness Score

This PR introduces an AI-powered answer analysis interface that evaluates whether an interview response covers the important concepts, examples, trade-offs, and edge cases expected for a question.

🚀 Features

• 🤖 AI answer completeness analysis
• 📊 Completeness percentage scoring
• 🎯 Expected answer-point identification
• ✅ Covered concept detection
• ⚠️ Missing point detection
• 💡 Missing topic recommendations
• 💻 Technical coverage analysis
• 🧩 Answer structure scoring
• 💡 Example coverage scoring
• ⚖️ Trade-off analysis
• 🔍 Edge-case analysis
• 📝 Original answer view
• ✨ Improved answer structure
• 📈 Before/after completeness comparison
• 📚 Recommended answer framework
• 🧠 Personalized AI recommendations
• 📊 Completeness progress tracking
• 🎯 Interview answer guidance
• 🌙 Dark mode support
• 📱 Responsive design

✅ Checklist

• Added answer completeness analyzer
• Added completeness percentage
• Added expected answer-point detection
• Added covered-point tracking
• Added missing-point detection
• Added missing topic recommendations
• Added technical coverage score
• Added example coverage score
• Added trade-off analysis
• Added edge-case analysis
• Added improved answer structure
• Added before/after comparison
• Added personalized recommendations
• Added progress tracking
• Added responsive design
• Added dark mode support
• Tested locally
• No breaking changes

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📥 Commits

Reviewing files that changed from the base of the PR and between a8a7be0 and cf9230f.

📒 Files selected for processing (1)

• frontend/src/pages/AIInterviewAnswerCompletenessScore/AIInterviewAnswerCompletenessScore.jsx

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