feat: consolidate env config and add deployment files

- Add debug_font_path, demo_docs_dir, e2e_api_base_url to config.py
- Fix hardcoded paths in pp_structure_debug.py, create_demo_images.py
- Fix hardcoded paths in test files
- Update .env.example with new configuration options
- Update .gitignore to exclude AI development files (.claude/, openspec/, AGENTS.md, CLAUDE.md)
- Add production startup script (start-prod.sh)
- Add README.md with project documentation
- Add 1panel Docker deployment files (docker-compose.yml, Dockerfiles, nginx.conf)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -38,14 +38,26 @@ env/
 *.swo
 *~
 .DS_Store
-.claude/settings.local.json
+
+# ===== AI Development Assistant Files =====
+# Claude Code configuration and settings
+.claude/
+# OpenSpec change management (proposals, specs, archives)
+openspec/
+# AI agent instructions
+AGENTS.md
+CLAUDE.md
 
 # ===== Environment Variables =====
+# Local environment files (contain secrets, never commit)
 .env.local
 .env.*.local
+frontend/.env.local
+frontend/.env.*.local
 
 # ===== Process ID Files =====
 .pid/
+.pid-prod/
 
 # ===== Logs =====
 logs/