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Improve CORS handling and error logging to fix moderation edge cases:
- Add x-idempotency-key to allowed CORS headers and expose explicit POST methods
- Extend CORS headers to include Access-Control-Allow-Methods
- Update edge function tracing and client error handling to better detect and log CORS/network issues
- Enhance error handling utilities to surface CORS-related failures and provide clearer user messages

src/lib/edgeFunctionTracking.ts

@@ -10,6 +10,7 @@ import { trackRequest } from './requestTracking';
 import { getErrorMessage } from './errorHandler';
 import { withRetry, isRetryableError, type RetryOptions } from './retryHelpers';
 import { breadcrumb } from './errorBreadcrumbs';
+import { logger } from './logger';
 
 /**
  * Invoke a Supabase edge function with request tracking
@@ -149,9 +150,31 @@ export async function invokeWithTracking<T = any>(
     }
     
     const errorMessage = getErrorMessage(error);
+    
+    // Detect CORS errors specifically
+    const isCorsError = errorMessage.toLowerCase().includes('cors') || 
+                       errorMessage.toLowerCase().includes('cross-origin') ||
+                       errorMessage.toLowerCase().includes('failed to send') ||
+                       (error instanceof TypeError && errorMessage.toLowerCase().includes('failed to fetch'));
+    
+    // Enhanced error logging
+    logger.error('[EdgeFunctionTracking] Edge function invocation failed', {
+      functionName,
+      error: errorMessage,
+      errorType: isCorsError ? 'CORS/Network' : (error as any)?.name || 'Unknown',
+      attempts: attemptCount,
+      isCorsError,
+      debugHint: isCorsError ? 'Browser blocked request - verify CORS headers allow X-Idempotency-Key or check network connectivity' : undefined,
+      status: (error as any)?.status,
+    });
+    
     return {
         data: null,
-        error: { message: errorMessage, status: (error as any)?.status },
+        error: { 
+          message: errorMessage, 
+          status: (error as any)?.status,
+          isCorsError,
+        },
         requestId: 'unknown',
         duration: 0,
         attempts: attemptCount,