What's New in v2.3.0 - Redesigned learning experience with improved responsiveness and smoother transitions between teaching and practice modes - Enhanced photo-solve feature with better image handling and progress indicators - Added satisfaction survey for collecting user feedback - Improved offline resilience — the app now gracefully handles network interruptions during learning sessions - Added global error recovery — if an unexpected error occurs, users can restart the app instead of seeing a blank screen - Performance improvements and reduced app bundle size - Various bug fixes and stability improvements

v2.2.4 Release Notes Subscription & Login - Fixed incorrect "free trial" panel showing for accounts with existing trial history when server sync fails - Added retry panel with clear error messaging when subscription status cannot be loaded - Improved subscription sync resilience: server errors no longer reset local trial state School and Grade Selection - First-launch school/grade selector with Taiwan high school database (500+ schools) and fuzzy search - Auto-sync to backend on login; also uploads when server returns empty data - Editable from user settings panel Legal and Compliance - Terms of service and privacy policy loaded dynamically from backend API - Loading state, error handling, and session-level caching Parent Binding - QR code auto-refreshes every 30 seconds silently - Binding status display for already-bound parent accounts Canvas & Drawing - MMKV-based drawing persistence: strokes survive app backgrounding - Orientation-isolated storage keys prevent cross-mode data contamination - Session state snapshot includes scroll position for recovery - Fixed last-stroke flicker by deferring dynamic layer clearing until static layer renders - setPaths forces Skia GPU rebuild for reliable path restoration - Differential screenshots crop tightly to written content, eliminating blank regions - Fixed SVG path coordinate transformation for compact screenshot capture Learning Experience - Refactored useDialogueSection: simplified logic, reduced ~200 lines - Student "dispute" action in both teaching and practice answer-check flows - New "try again" scaffolding action with orientation-aware differential screenshots - Mode transition text: teaching changed to "分步驟教學", removed subtitles - Canvas clear signal on mode transitions and topic changes - "再來一題", reset, and practice entry guarantee different numbers from previous attempt Answer Check Architecture - Teaching and practice scenarios use separate API endpoints with automatic fallback - Scaffolding retry uses dedicated endpoint when available - Backend can independently evolve prompts and logic per scenario without app updates Quick Action Safety - Shared useQuickActionSafety hook for landscape and portrait layouts - 3-second stuck detection with alert to return home - Busy state coordination across typing, sending, and AI thinking Scaffolding - Redesigned ScaffoldingChoiceCard with direct action buttons - Simplified to "Let me try again" and "I don't know" options - Independent text input for free-form responses Geometry Rendering - Auto-calculates bounds from object coordinates when no explicit range provided - 10% padding around auto-calculated bounds Visual Theme - Dark navy gradient (#132D5E) for learning and home screens - HexBokehField: hexagonal bokeh particle background with 3-depth layers - Dark frosted glassmorphism home cards - Splash screen updated to match dark theme Portrait Layout - Rounded card wrapper (borderRadius: 20) matching landscape mode - iOS-compatible shadow and overflow clipping Platform and Build - App renamed from "Ferretor" to "Navious" - Separated bundle identifiers per environment - Fixed ESM/CommonJS module conflict in build configuration Settings - Removed LLM model configuration UI - Added school/grade display and edit Bug Fixes - Fixed CaseSummary storage key collision - Fixed intro completion tracking for teaching tags - Quiz grading and result display refinements - Multiple minor bug fixes and code cleanup

What's Changed: Fixed LLM mistake checking to include question context, making error analysis more accurate. Changes: Added optional parameters to mistake check API (question text, teaching step info) Updated learning mode to pass context when checking student mistakes All changes are backward compatible Impact: No breaking changes Better error feedback for students Need to test: mistake checking in teaching mode and practice mode Files: src/services/llm/ (API changes) src/features/learning/hook/useDialogueSection.ts (usage)

Ferretor Student App - Feature Overview Platform Support The app supports two device types with different layouts optimized for each: Tablet: Large screen, forced landscape orientation, split-screen layout Phone: Small screen, portrait orientation, full-screen dialogue Home Screen Common Features Gradient background with decorative circles based on theme settings Brand logo with slogan display Animated login and signup card transitions Force update modal that blocks usage when app version is outdated User settings panel with glass-morphism design After Login Learning mode button for starting study sessions Photo solve button for camera-based problem solving (development only) Quiz mode button (tablet only, development only) User icon button to open settings panel Learning Mode Tablet Version 50/50 split layout with dialogue on one side and handwriting canvas on the other Handedness setting controls which side each panel appears Full drawing canvas with pen, eraser, and lasso tools Lasso selection captures handwritten content and attaches to dialogue input Custom on-screen keyboard integrated with note section Paper style options including blank, grid, and lined Library selector modal for switching chapters and cases Phone Version Full-screen dialogue layout with no handwriting area Dark-themed header with back button, title, and library button Simplified interface focused on conversation with AI tutor Keyboard avoiding behavior when system keyboard appears Library selector optimized for vertical scrolling Features Removed from Phone Version Handwriting canvas and all drawing tools Lasso selection and image attachment Custom keyboard Paper style settings Handedness settings (hidden since no canvas exists) Dialogue Section Features Question card display with geometry figure rendering AI-powered conversation with typing animation Voice input support for hands-free interaction Quick action buttons for common responses Solution steps panel showing step-by-step explanations Online/offline status indicator Progress tracking for current chapter User Settings Panel Available on Both Platforms User avatar, name, and email display Theme selection (light, dark, system) LLM model configuration (development only) Server connection status Logout functionality Tablet Only Handedness toggle for left or right hand preference Paper style selection for handwriting canvas Library Selector Three-level hierarchy navigation: Book, Unit, Chapter Case cards showing problem titles with enter buttons Last visited case highlighting for quick resume Tablet version uses landscape modal layout Phone version uses compact vertical scrolling layout Touch-friendly enlarged UI elements on phone Technical Implementation Responsive Scaling Width-based scaling for phone devices Height-based scaling for tablet devices Device type detection hook returns phone or tablet status State Management Settings store handles theme, handedness, and paper style Auth store manages authentication state Library store tracks selected chapter and case Dialogue store maintains learning session state Version Control Version check hook compares app version with server minimum requirement Force update modal blocks app usage when version is too old Automatic redirect to app store for updates Orientation Handling Tablet forces landscape orientation using Expo screen orientation API Phone uses default portrait orientation

Version 1.2.0 Release Notes New Features Exam System: Complete exam preparation with question management, progress tracking, and preparation dashboard PDF Learning Report: Export learning progress reports as PDF Training Ground: New standalone practice mode Handwriting Recognition: Handwriting input with AI-powered analysis Process Analysis: Track student problem-solving process and provide feedback Mastery System: Calculate and track learning mastery levels Account Deletion: Users can delete their account with confirmation Geometry Rendering: Support for mathematical geometry graphics display Offline Mode: Offline usage and login persistence Forced Update: Ensure users are on the latest version Notification System: Initial notification functionality LINE Integration: Account binding with LINE Tutorial System: In-app guidance with spotlight feature Developer Mode: LLM model selection and v3 analysis mode API Health Check: Improved connectivity monitoring Improvements UI/UX overhaul (UIUXproMax module) Responsive layout optimization across all screens Handwriting area and doodle functionality improvements Chapter selector interface enhancements Navigation system refactoring Recommendation system with mistake handling mode Handwriting smoothness improvements Code formatting (Prettier) Bug Fixes Fixed eraser switching crash issue Fixed login storage mounting order issue Fixed offline login persistence Fixed synthetic division calculation Fixed Android page addition logic Fixed casePractice restart button trigger issue Fixed copy_error diagnostic styling Fixed EAS build issues

• 手寫功能優化 - 改善手寫區域的操作體驗 - 優化新增紙張功能 • 練習系統改進 - 優化綜合除法練習介面 - 新增答案即時檢查功能 - 新增手寫過程分析功能 • 穩定性提升 - 修復已知問題，主要包含後端api連線問題 - 提升整體運行效能