🧾 CHANGELOG

Project: Study Guide & Personal Assistant
Repository: GPA95/SGPA
Last Updated: 1st February 2026

Visual Explanations in Explainer
- Explainer responses now include a simple, sketchable diagram idea at the end of each explanation.
- Diagrams are described in text so students can quickly draw them in notebooks during revision or exams.
Summarizer PDF Handling Fixes
- Added a stronger “short text” guard for PDF summarization.
- Clear warning message when extracted text is too short or likely from scanned/image-based PDFs, guiding users to try another file or paste text directly.
- Reduces confusing “too short to summarize” loops and improves robustness with real-world PDFs.
Lightweight Usage Analytics
- Implemented privacy-friendly interaction logging to a local CSV file.
- Each interaction logs timestamp, anonymous session ID, mode (Explainer / Summarizer / Quizzer), sub-mode, PDF usage flag, and prompt/response length.
- Enables post-hoc analysis of:
  - Total interactions
  - Approximate study sessions
  - Mode usage distribution
  - PDF-based study patterns
Branding & UI Updates
- Rebranded app in UI to SGPA – Study Guide & Personal Assistant.
- Added a custom SGPA logo and integrated it into the app header/page icon.
- Introduced a custom Streamlit theme (e.g., “Focus Forest” / “Modern Academic”) via .streamlit/config.toml for a more polished, student-friendly look.

Ensured logging is fail-safe (analytics never breaks the app if file writes fail).
Normalized asset paths and filenames for reliable deployment on Streamlit Cloud.
Cleaned up .gitignore and configuration files so theme and analytics behave consistently in both local and cloud environments.

Quizzer Mode Expanded:
- Added three sub-modes:
  - 📝 Generate Questions: MCQ, T/F, Fill in the Blanks, Descriptive — answers collected in answer key section
  - 📖 Solve Questions: Exam-style answers auto-adapted to marks/word limit
  - ✅ Evaluate Answers: Automated feedback, scoring, and tips for submitted answers
- Answer key now shown at the end of quizzes for self-testing
Context-Aware Chat:
- Improved support for follow-up questions/responses using previous chat history in all modes
Dynamic Sidebar:
- Nested radio buttons for Quizzer actions; emoji-powered UI
- Clickable badge links for GitHub Repo and User Help document
User Help Documentation:
- Published quick-start guide covering sample inputs, usage tips, format instructions, troubleshooting, and UI walkthrough
- Help doc directly accessible from sidebar
Refined Prompts & Outputs:
- Exam-optimized summaries and answer formatting
- Markdown-friendly structure, answer keys, bullet points
- Improved adaptive answer length based on marks/word limits
UI/UX Enhancements:
- Code block outputs with one-click copy capability
- Info banners for mode guidance and instructions
- Instant feedback buttons for user rating after responses
Performance / Stability:
- Improved error/timeout handling for API rate limits
- Input text limits for large notes/PDFs for manageable processing
- Auto-clearing new chat notifications for better UX

Streamlined code structure and modularization for maintainability
Optimized backend prompt logic for clarity, exam readiness, and user options
Foundations laid for planned features (speech, flashcards, login, notes, multi-language, etc.)

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