feat: Enhance dashboard with charts, study report viewer, and pruning tracking

- Add ConvergencePlot component with running best, statistics, gradient fill
- Add ParameterImportanceChart with Pearson correlation analysis
- Add StudyReportViewer with KaTeX math rendering and full markdown support
- Update pruning endpoint to query Optuna database directly
- Add /report endpoint for STUDY_REPORT.md files
- Fix chart data transformation for single/multi-objective studies
- Update Protocol 13 documentation with new components
- Update generate-report skill with dashboard integration

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

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

atomizer-dashboard/frontend/package.json

@@ -18,9 +18,13 @@
     "lucide-react": "^0.554.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
+    "react-markdown": "^10.1.0",
     "react-router-dom": "^6.20.0",
     "react-use-websocket": "^4.13.0",
     "recharts": "^2.10.3",
+    "rehype-katex": "^7.0.1",
+    "remark-gfm": "^4.0.1",
+    "remark-math": "^6.0.0",
     "tailwind-merge": "^3.4.0",
     "three": "^0.181.2"
   },