revert: Remove debugging infrastructure while keeping bug fixes

Removed:
- ErrorBoundary component and all error boundary wrapping
- Debug console.log statements from useReasoningTranslation
- Debug useEffect in DashboardPage
- Dev mode Dockerfile (Dockerfile.kubernetes.dev)
- Dev mode Tilt configuration
- Enhanced vite watcher config (depth, awaitWriteFinish, HMR overlay)

Kept actual bug fixes:
- String() coercion in translation functions
- useMemo/useCallback for formatters
- Null guards in components
- Basic vite ignored patterns (node_modules, dist, .git)
- Conditional rendering in DashboardPage

frontend/src/components/ErrorBoundary.tsx

@@ -1,68 +0,0 @@
-import React, { Component, ErrorInfo, ReactNode } from 'react';
-
-interface Props {
-  children: ReactNode;
-  componentName?: string;
-}
-
-interface State {
-  hasError: boolean;
-  error?: Error;
-  errorInfo?: ErrorInfo;
-}
-
-/**
- * Error Boundary to catch React errors and show debug information
- */
-export class ErrorBoundary extends Component<Props, State> {
-  constructor(props: Props) {
-    super(props);
-    this.state = { hasError: false };
-  }
-
-  static getDerivedStateFromError(error: Error): State {
-    return { hasError: true, error };
-  }
-
-  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
-    console.error('🔴 ErrorBoundary caught error:', {
-      component: this.props.componentName || 'Unknown',
-      error: error.message,
-      stack: error.stack,
-      componentStack: errorInfo.componentStack,
-    });
-
-    this.setState({ error, errorInfo });
-  }
-
-  render() {
-    if (this.state.hasError) {
-      return (
-        <div className="bg-red-50 border-2 border-red-300 rounded-xl p-6 m-4">
-          <h2 className="text-xl font-bold text-red-900 mb-2">
-            🔴 Error in {this.props.componentName || 'Component'}
-          </h2>
-          <div className="bg-white rounded p-4 mb-4">
-            <p className="text-sm font-mono text-red-800 mb-2">
-              <strong>Error:</strong> {this.state.error?.message}
-            </p>
-            {this.state.error?.stack && (
-              <details className="text-xs text-gray-700">
-                <summary className="cursor-pointer font-semibold">Stack Trace</summary>
-                <pre className="mt-2 overflow-auto">{this.state.error.stack}</pre>
-              </details>
-            )}
-          </div>
-          <button
-            onClick={() => this.setState({ hasError: false, error: undefined, errorInfo: undefined })}
-            className="bg-red-600 hover:bg-red-700 text-white px-4 py-2 rounded-lg"
-          >
-            Try Again
-          </button>
-        </div>
-      );
-    }
-
-    return this.props.children;
-  }
-}