feat: Add Insights tab to dashboard for physics visualizations

Dashboard integration for Study Insights module (SYS_16):
- Backend: New /api/insights/ routes for generating and viewing insights
- Frontend: New Insights.tsx page with Plotly visualization
- Navigation: Added Insights tab between Analysis and Results

Available insight types:
- Zernike WFE (wavefront error for mirrors)
- Stress Field (Von Mises stress contours)
- Modal Analysis (natural frequencies/mode shapes)
- Thermal Field (temperature distribution)
- Design Space (parameter-objective exploration)

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

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

atomizer-dashboard/frontend/src/App.tsx

@@ -8,6 +8,7 @@ import Home from './pages/Home';
 import Setup from './pages/Setup';
 import Dashboard from './pages/Dashboard';
 import Analysis from './pages/Analysis';
+import Insights from './pages/Insights';
 import Results from './pages/Results';
 
 const queryClient = new QueryClient({
@@ -34,6 +35,7 @@ function App() {
                 <Route path="setup" element={<Setup />} />
                 <Route path="dashboard" element={<Dashboard />} />
                 <Route path="analysis" element={<Analysis />} />
+                <Route path="insights" element={<Insights />} />
                 <Route path="results" element={<Results />} />
               </Route>
             </Routes>