Fix Space issues: Remove blocking route and fix health check

1. Remove emergency route that was blocking React app from loading
2. Fix health check to tolerate missing API keys (missing_key \!= error)
- Now returns 200 unless there's a real API error
- Space will show as healthy even without all API keys configured

This should make the Space show the actual React UI and remove
the 'may have issues' warning banner.

server/index.ts

@@ -42,19 +42,7 @@ if (process.env.NODE_ENV === 'production') {
 
 console.log("✅ Express app created");
 
-// IMMEDIATE fallback route - ensures HF Spaces gets a response no matter what
-app.get('/', (_req, res) => {
-  console.log("🆘 EMERGENCY: Immediate root route triggered");
-  res.send(`
-    <h1>🚀 KnowledgeBridge Emergency Response</h1>
-    <p><strong>Status:</strong> Server started but may have issues</p>
-    <p><strong>Time:</strong> ${new Date().toISOString()}</p>
-    <p><strong>Environment:</strong> NODE_ENV=${process.env.NODE_ENV}</p>
-    <p><a href="/api/health">Try Health Check</a></p>
-  `);
-});
-
-console.log("✅ Emergency root route added");
+console.log("✅ Server setup starting");
 
 // Security middleware
 app.use(helmet({

server/routes.ts

@@ -1089,7 +1089,7 @@ Provide a brief, engaging explanation (2-3 sentences) that would be pleasant to
       const { checkAPIHealth } = await import('./api-health-check');
       const healthStatus = await checkAPIHealth();
       
-      const overallHealthy = healthStatus.every(status => status.status === 'healthy');
+      const overallHealthy = healthStatus.every(status => status.status !== 'error');
       
       res.status(overallHealthy ? 200 : 503).json({
         overall: overallHealthy ? 'healthy' : 'issues_detected',