Debug: Enhanced HF Spaces environment detection

🔍 Added comprehensive HF Spaces detection:
- Check window.huggingface.variables (original method)
- Check hostname for hf.space and huggingface.co domains
- Check for HF-specific meta tags
- Added detailed console logging for debugging

🎯 This should resolve the issue where auth modal
wasn't showing in HF Spaces environment

📝 Console logs will show exactly what's being detected
so we can identify why authentication wasn't triggered

frontend/src/context/AuthContext.tsx

@@ -149,13 +149,35 @@ export function AuthProvider({ children }: { children: ReactNode }) {
         dispatch({ type: "AUTH_SUCCESS", payload: normalizedResult });
       } else {
         // No OAuth redirect found, check if we need to show auth modal
-        const isHFSpaces = window.huggingface && window.huggingface.variables;
+        
+        // Enhanced HF Spaces detection with debugging
+        const isHFSpaces = 
+          // Method 1: Check for window.huggingface
+          (window.huggingface && window.huggingface.variables) ||
+          // Method 2: Check for HF-specific URL patterns
+          window.location.hostname.includes('hf.space') ||
+          window.location.hostname.includes('huggingface.co') ||
+          // Method 3: Check for HF-specific environment indicators
+          document.querySelector('meta[name="hf:space"]') !== null;
+        
+        // Debug logging (remove in production)
+        console.log("🔍 HF Spaces Environment Check:", {
+          hostname: window.location.hostname,
+          hasHuggingface: !!window.huggingface,
+          hasVariables: !!(window.huggingface && window.huggingface.variables),
+          hasHfMeta: !!document.querySelector('meta[name="hf:space"]'),
+          isHFSpaces,
+          href: window.location.href
+        });
+        
         if (isHFSpaces) {
           // In HF Spaces, we require authentication - show the modal
+          console.log("🔐 HF Spaces detected - showing auth modal");
           dispatch({ type: "SET_LOADING", payload: false });
           openModal("auth-login", "Sign in to AgentGraph");
         } else {
           // In local development, no auth required
+          console.log("🏠 Local development detected - no auth required");
           dispatch({ type: "SET_LOADING", payload: false });
         }
       }
@@ -172,8 +194,12 @@ export function AuthProvider({ children }: { children: ReactNode }) {
     try {
       dispatch({ type: "AUTH_START" });
 
-      // Check if we're in HF Spaces environment
-      const isHFSpaces = window.huggingface && window.huggingface.variables;
+      // Check if we're in HF Spaces environment  
+      const isHFSpaces = 
+        (window.huggingface && window.huggingface.variables) ||
+        window.location.hostname.includes('hf.space') ||
+        window.location.hostname.includes('huggingface.co') ||
+        document.querySelector('meta[name="hf:space"]') !== null;
 
       if (isHFSpaces) {
         // Use HF OAuth