feat: Add professional web-based optimization dashboard

Complete dashboard UI for controlling and monitoring optimization runs.

Backend API (Flask):
- RESTful endpoints for study management
- Start/stop/resume optimization runs
- Real-time status monitoring
- Configuration management
- Visualization data endpoints

Frontend (HTML/CSS/JS + Chart.js):
- Modern gradient design with cards and charts
- Study list sidebar with metadata
- Active optimizations monitoring (5s polling)
- Interactive charts (progress, design vars, constraints)
- Trial history table
- New optimization modal
- Resume/delete study actions

Features:
- List all studies with trial counts
- View detailed study results
- Start new optimizations from UI
- Resume existing studies with additional trials
- Real-time progress monitoring
- Delete unwanted studies
- Chart.js visualizations (progress, DVs, constraints)
- Configuration file selection
- Study metadata tracking

Usage:
  python dashboard/start_dashboard.py
  # Opens browser to http://localhost:5000

Dependencies:
  flask, flask-cors (auto-installed)

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

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

dashboard/start_dashboard.py

@@ -0,0 +1,45 @@
+"""
+Atomizer Dashboard Launcher
+
+Simple script to start the dashboard server and open the browser.
+"""
+
+import sys
+import webbrowser
+import time
+from pathlib import Path
+import subprocess
+
+def main():
+    dashboard_dir = Path(__file__).parent
+    api_script = dashboard_dir / 'api' / 'app.py'
+
+    print("="*60)
+    print("ATOMIZER DASHBOARD LAUNCHER")
+    print("="*60)
+    print(f"\nStarting dashboard server...")
+    print(f"Dashboard will open at: http://localhost:5000")
+    print("\nPress Ctrl+C to stop the server")
+    print("="*60)
+
+    # Give user a moment to read
+    time.sleep(2)
+
+    # Open browser after a short delay
+    def open_browser():
+        time.sleep(3)  # Wait for server to start
+        webbrowser.open('http://localhost:5000')
+
+    import threading
+    browser_thread = threading.Thread(target=open_browser, daemon=True)
+    browser_thread.start()
+
+    # Start the Flask server
+    try:
+        subprocess.run([sys.executable, str(api_script)], cwd=str(dashboard_dir))
+    except KeyboardInterrupt:
+        print("\n\nShutting down dashboard server...")
+        print("Goodbye!")
+
+if __name__ == '__main__':
+    main()