PyVizAST Prerelease 1.0.0-beta

LLM AI Refactoring & Bug Fixes

LLM Explanation Panel Refactoring:

• Redesigned AI explanation panel with premium black/white minimalist theme
• Added unavailable state UI with helpful messages when LLM not configured
• Added fullscreen modal for detailed reading
• Improved loading states and error handling
• Auto-retry on failure (up to 2 times)

Backend LLM Service Refactoring:

• Improved prompt templates with clearer JSON output format requirements
• Multi-strategy JSON parsing with fallback mechanisms
• Thread-safe caching with TTL for explanation caching
• Case-insensitive model name matching (codeLlama:7b vs codellama:7b)
• Separated error handling for availability check and model listing
• Added shorter timeouts to avoid UI hanging

Frontend LLM Integration Improvements:

• Added custom event system (llmConfigChanged) for cross-component communication
• Fixed React Hooks order issue (useMemo before early return)
• Fixed incorrect default status value ('ready' → 'unavailable')
• Improved SSE parsing with type annotations
• Better error feedback and loading states

Files Added:

• frontend/src/components/LLMExplanationPanel.js - AI explanation panel component
• frontend/src/components/LLMExplanationPanel.css - Black/white minimalist styles

Files Modified:

• backend/llm/prompts.py - Improved prompt templates
• backend/llm/service.py - Multi-strategy parsing, caching, status handling
• backend/llm/ollama_client.py - Shorter timeouts
• backend/routers/llm.py - Unified error responses, detailed logging
• frontend/src/api.js - SSE parsing, shorter timeouts
• frontend/src/components/LLMSettings.js - Event dispatching, improved status handling
• frontend/src/components/ASTVisualizer.js - Event listeners, fixed default status
• frontend/src/components/ASTVisualizer3D.js - Event listeners, fixed default status
• frontend/src/components/components.css - LLM explanation panel styles

Bug Fixes:

• Fixed model not loading when clicking Load button
• Fixed UI stuck at loading state (timeout optimization)
• Fixed false "loaded" display when model not actually loaded
• Fixed React Hooks error (useMemo called after early return)
• Fixed model name case sensitivity matching