feat: Improve dashboard performance and Claude terminal context

- Add trial limiting (300 max) and reduce polling to 15s for large studies
- Make dashboard layout wider with col-span adjustments
- Claude terminal now runs from Atomizer root for CLAUDE.md/skills access
- Add study context display in terminal on connect
- Add KaTeX math rendering styles for study reports
- Add surrogate tuner module for hyperparameter optimization
- Fix backend proxy to port 8001

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

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

atomizer-dashboard/frontend/src/components/ClaudeTerminal.tsx

@@ -149,21 +149,25 @@ export const ClaudeTerminal: React.FC<ClaudeTerminalProps> = ({
     setIsConnecting(true);
     setError(null);
 
-    // Determine working directory - use study path if available
-    let workingDir = '';
-    if (selectedStudy?.id) {
-      // The study directory path
-      workingDir = `?working_dir=C:/Users/Antoine/Atomizer`;
-    }
+    // Always use Atomizer root as working directory so Claude has access to:
+    // - CLAUDE.md (system instructions)
+    // - .claude/skills/ (skill definitions)
+    // Pass study_id as parameter so we can inform Claude about the context
+    const workingDir = 'C:/Users/Antoine/Atomizer';
+    const studyParam = selectedStudy?.id ? `&study_id=${selectedStudy.id}` : '';
 
     const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
-    const ws = new WebSocket(`${protocol}//${window.location.host}/api/terminal/claude${workingDir}`);
+    const ws = new WebSocket(`${protocol}//${window.location.host}/api/terminal/claude?working_dir=${workingDir}${studyParam}`);
 
     ws.onopen = () => {
       setIsConnected(true);
       setIsConnecting(false);
       xtermRef.current?.clear();
       xtermRef.current?.writeln('\x1b[1;32mConnected to Claude Code\x1b[0m');
+      if (selectedStudy?.id) {
+        xtermRef.current?.writeln(`\x1b[90mStudy context: \x1b[1;33m${selectedStudy.id}\x1b[0m`);
+        xtermRef.current?.writeln('\x1b[90mTip: Tell Claude about your study, e.g. "Help me with study ' + selectedStudy.id + '"\x1b[0m');
+      }
       xtermRef.current?.writeln('');
 
       // Send initial resize