feat: Add dashboard chat integration and MCP server

Major changes:
- Dashboard: WebSocket-based chat with session management
- Dashboard: New chat components (ChatPane, ChatInput, ModeToggle)
- Dashboard: Enhanced UI with parallel coordinates chart
- MCP Server: New atomizer-tools server for Claude integration
- Extractors: Enhanced Zernike OPD extractor
- Reports: Improved report generator

New studies (configs and scripts only):
- M1 Mirror: Cost reduction campaign studies
- Simple Beam, Simple Bracket, UAV Arm studies

Note: Large iteration data (2_iterations/, best_design_archive/)
excluded via .gitignore - kept on local Gitea only.

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

atomizer-dashboard/frontend/src/pages/Analysis.tsx

@@ -27,7 +27,19 @@ const PlotlyRunComparison = lazy(() => import('../components/plotly/PlotlyRunCom
 
 const ChartLoading = () => (
   <div className="flex items-center justify-center h-64 text-dark-400">
-    <div className="animate-pulse">Loading chart...</div>
+    <div className="flex flex-col items-center gap-2">
+      <div className="animate-spin w-6 h-6 border-2 border-primary-500 border-t-transparent rounded-full"></div>
+      <span className="text-sm animate-pulse">Loading chart...</span>
+    </div>
+  </div>
+);
+
+const NoData = ({ message = 'No data available' }: { message?: string }) => (
+  <div className="flex items-center justify-center h-64 text-dark-500">
+    <div className="flex flex-col items-center gap-2">
+      <BarChart3 className="w-8 h-8" />
+      <span className="text-sm">{message}</span>
+    </div>
   </div>
 );
 
@@ -70,6 +82,7 @@ export default function Analysis() {
   const { selectedStudy, isInitialized } = useStudy();
   const [activeTab, setActiveTab] = useState<AnalysisTab>('overview');
   const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
   const [trials, setTrials] = useState<TrialData[]>([]);
   const [metadata, setMetadata] = useState<StudyMetadata | null>(null);
   const [paretoFront, setParetoFront] = useState<any[]>([]);
@@ -88,9 +101,13 @@ export default function Analysis() {
 
     const loadData = async () => {
       setLoading(true);
+      setError(null);
       try {
-        // Load trial history
+        // Load trial history (required)
         const historyRes = await fetch(`/api/optimization/studies/${selectedStudy.id}/history?limit=500`);
+        if (!historyRes.ok) {
+          throw new Error(`Failed to load trial history: ${historyRes.statusText}`);
+        }
         const historyData = await historyRes.json();
         const trialsData = historyData.trials.map((t: any) => {
           let values: number[] = [];
@@ -112,26 +129,45 @@ export default function Analysis() {
         });
         setTrials(trialsData);
 
-        // Load metadata
-        const metadataRes = await fetch(`/api/optimization/studies/${selectedStudy.id}/metadata`);
-        const metadataData = await metadataRes.json();
-        setMetadata(metadataData);
-
-        // Load Pareto front
-        const paretoRes = await fetch(`/api/optimization/studies/${selectedStudy.id}/pareto-front`);
-        const paretoData = await paretoRes.json();
-        if (paretoData.is_multi_objective && paretoData.pareto_front) {
-          setParetoFront(paretoData.pareto_front);
+        // Load metadata (optional, graceful fallback)
+        try {
+          const metadataRes = await fetch(`/api/optimization/studies/${selectedStudy.id}/metadata`);
+          if (metadataRes.ok) {
+            const metadataData = await metadataRes.json();
+            setMetadata(metadataData);
+          }
+        } catch {
+          console.warn('Metadata not available');
         }
 
-        // Load runs data for comparison
-        const runsRes = await fetch(`/api/optimization/studies/${selectedStudy.id}/runs`);
-        const runsData = await runsRes.json();
-        if (runsData.runs) {
-          setRuns(runsData.runs);
+        // Load Pareto front (optional)
+        try {
+          const paretoRes = await fetch(`/api/optimization/studies/${selectedStudy.id}/pareto-front`);
+          if (paretoRes.ok) {
+            const paretoData = await paretoRes.json();
+            if (paretoData.is_multi_objective && paretoData.pareto_front) {
+              setParetoFront(paretoData.pareto_front);
+            }
+          }
+        } catch {
+          console.warn('Pareto data not available');
+        }
+
+        // Load runs data for comparison (optional)
+        try {
+          const runsRes = await fetch(`/api/optimization/studies/${selectedStudy.id}/runs`);
+          if (runsRes.ok) {
+            const runsData = await runsRes.json();
+            if (runsData.runs) {
+              setRuns(runsData.runs);
+            }
+          }
+        } catch {
+          console.warn('Runs data not available');
         }
       } catch (err) {
         console.error('Failed to load analysis data:', err);
+        setError(err instanceof Error ? err.message : 'Failed to load analysis data');
       } finally {
         setLoading(false);
       }
@@ -271,6 +307,20 @@ export default function Analysis() {
         <div className="flex items-center justify-center py-16">
           <RefreshCw className="w-8 h-8 animate-spin text-dark-400" />
         </div>
+      ) : error ? (
+        <div className="flex flex-col items-center justify-center py-16 gap-4">
+          <div className="text-red-400 text-6xl">!</div>
+          <div className="text-red-400 text-lg font-medium">Error Loading Data</div>
+          <div className="text-dark-400 text-sm max-w-md text-center">{error}</div>
+          <button
+            onClick={() => window.location.reload()}
+            className="mt-4 px-4 py-2 bg-primary-600 hover:bg-primary-500 text-white rounded-lg transition-colors"
+          >
+            Retry
+          </button>
+        </div>
+      ) : trials.length === 0 ? (
+        <NoData message="No trials found for this study" />
       ) : (
         <>
           {/* Overview Tab */}