feat: add AI interview preparation completion predictor

[jainiksha]

📌 Description

✨ Added AI Interview Preparation Completion Predictor

This PR introduces an AI-powered preparation planning system that estimates whether a user can complete their planned interview preparation before the interview deadline.

🚀 Features

• 🤖 AI preparation completion prediction
• 📊 Overall preparation completion percentage
• 📅 Interview deadline tracking
• ⏳ Remaining preparation days
• 📝 Remaining preparation task analysis
• ⏱️ Remaining preparation hour estimation
• 📈 Historical completion-rate analysis
• 🕒 Historical daily study-time analysis
• 🧠 Topic difficulty consideration
• 📅 Estimated completion date
• 🎲 Current completion probability
• ⏰ Recommended daily workload
• 🚨 At-risk preparation area detection
• 📚 Topic-wise preparation progress
• 🎯 High-priority topic identification
• 📊 Current vs required study workload
• 💡 AI personalized preparation recommendations
• 📈 Preparation progress tracking
• 🔄 Completion prediction recalculation
• 🌙 Dark mode support
• 📱 Responsive design

✅ Checklist

• Added preparation completion predictor
• Added remaining task analysis
• Added historical completion analysis
• Added daily study-time analysis
• Added topic difficulty analysis
• Added interview deadline tracking
• Added estimated completion date
• Added completion probability
• Added recommended daily workload
• Added at-risk area detection
• Added topic-wise progress
• Added AI recommendations
• Added preparation progress tracking
• Added recalculation interaction
• Responsive design implemented
• Dark mode supported
• Tested locally
• No breaking changes

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📥 Commits

Reviewing files that changed from the base of the PR and between a8a7be0 and bc0dd22.

📒 Files selected for processing (1)

• frontend/src/pages/AIInterviewPreparationCompletionPredictor/AIInterviewPreparationCompletionPredictor.jsx

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