Changelog

✨ New Features

• Fullscreen view — Expand complex diagrams with pan and zoom
• Picture-in-picture — Pin diagrams to a corner, keep chatting while referencing

🚀 Improvements

• Context compression — Node-level intelligent summarization, 75% context reduction. AI stays sharp even in deep courses.
• Quiz submit states improved (submitting → submitted), prevents double submissions
• Breathing animation while AI thinks — no more blank screen waiting

🐛 Fixes

• Fixed diagram arrows/connectors occasionally not rendering
• Fixed quiz cards non-interactive after page refresh
• Fixed AI making duplicate tool calls
• Fixed Chinese bold text rendering across paragraphs

✨ New Features

• Course status grouping — Sidebar groups sessions by "Learning / New / Completed" with real-time progress bars
• Invite friends — Unique referral code per user. Both you and your friend get 30 bonus messages.
• Fresh home page — Redesigned input experience. More focused, more calming.

🚀 Improvements

• Smoother text streaming — optimized output for even, natural delivery
• Performance: Gzip compression + CORS preflight caching for faster mobile responses

✨ New Features

• Subscription billing — Free / Starter / Pro tiers with Stripe integration and real-time usage indicator
• Listening drills — Multi-speed loop method (1x → 3x → 1x, seven rounds). True comprehension, not just exposure.
• Speaking practice — Record and get word-by-word scoring. Green/orange/red for precise pronunciation feedback.

🚀 Improvements

• Language exercises billed per usage — limited trial on Free, unlimited on Starter+
• Usage indicator with color states (<80% gray / ≥80% orange / 100% red)

✨ New Features

• Web search — AI tutor searches the web in real time, citing up-to-date docs. No more stale training data.
• Quote & ask — Select any text from AI responses and quote it in your follow-up. Like highlighting a textbook.
• AI suggested replies — Stuck? Hit the lightning button for an AI-generated starting point.

🐛 Fixes

• Fixed user message text invisible in dark mode
• Fixed double scrollbar issue

✨ New Features

• Learner memory — AI remembers your background, strengths, mistakes, and preferences across courses. No more starting from scratch.
• SM-2 spaced repetition — Mastered concepts are scheduled for review along the forgetting curve. Learned ≠ retained.
• My Profile — View and manage everything the AI knows about you in the sidebar. Delete anything inaccurate.

🚀 Improvements

• Memory updates are silent — AI records observations during teaching without interruption

✨ New Features

• Email login — Supabase Auth integration with email sign-up and sign-in
• Learning history — All conversations, roadmaps, and scores saved to the cloud — nothing lost when you close the browser
• Resume learning — Reopen the page and automatically pick up where you left off

🚀 Improvements

• Minimal home page design: one input + one guiding sentence, zero decision pressure
• Clickable topic tags that auto-fill the input

✨ New Features

• Assessment diagnosis — Before learning, AI asks 3-5 open-ended questions to gauge your real level, skipping what you already know
• Self-assessment cards — Rate your confidence (1-5) before formal evaluation, building metacognitive awareness
• Interleaving exercises — Every 3-4 questions, previously mastered concepts are mixed in for cross-review

🚀 Improvements

• Markdown streaming with code syntax highlighting (Catppuccin Mocha theme)
• Warm-gray user message bubbles for visual depth

✨ New Features

• Conversational teaching — AI 1-on-1 Socratic Q&A with streaming output, follow-up questions, and guided learning
• Learning roadmap — Enter any topic, AI generates a progressive knowledge node graph
• Mastery scoring — Four-dimension evaluation (accuracy, depth, novel application, discrimination), 80%+ to unlock the next node
• Interactive quizzes — Quiz cards with click-to-answer interaction