Optimize requirements.txt for faster HF Spaces build

- Use exact versions instead of >= to speed up dependency resolution
- Remove unused dependencies (dice, fastmcp, rich, tqdm, pillow, requests)
- Keep only essential packages for Gradio app
- Should fix containerd timeout issues

requirements.txt

@@ -1,37 +1,20 @@
-# D&D Campaign Manager - Hugging Face Space Requirements
-# Production dependencies only
+# D&D Campaign Manager - Minimal Requirements for HF Spaces
+# Optimized for faster build times
 
 # Core Framework
-gradio>=5.0.0
-pydantic>=2.0.0
-python-dotenv>=1.0.0
+gradio==5.0.0
+pydantic==2.9.0
+python-dotenv==1.0.0
 
-# AI/LLM Providers
-anthropic>=0.39.0
-google-generativeai>=0.8.0
-openai>=1.54.0
-
-# MCP (Model Context Protocol)
-fastmcp>=0.2.0
-
-# Database & Storage
-# Note: SQLite is built into Python, no extra deps needed
+# AI/LLM Providers (specific versions for faster resolution)
+anthropic==0.39.0
+google-generativeai==0.8.0
+openai==1.54.0
 
 # Data Processing
-pyyaml>=6.0.0
-jinja2>=3.1.0
-
-# Dice & Game Mechanics
-dice>=4.0.0
-
-# Image Generation (Optional)
-pillow>=10.0.0
-requests>=2.31.0
+pyyaml==6.0.0
+jinja2==3.1.0
 
 # Document Parsing
-python-docx>=1.1.0
-pypdf>=3.17.0
-
-# Utilities
-rich>=13.0.0
-tqdm>=4.66.0
+python-docx==1.1.0
+pypdf==3.17.0