Enable RLS on rate limits table

src/lib/errorHandler.ts

@@ -0,0 +1,63 @@
+import { toast } from 'sonner';
+import { logger } from './logger';
+
+export type ErrorContext = {
+  action: string;
+  userId?: string;
+  metadata?: Record<string, any>;
+};
+
+export class AppError extends Error {
+  constructor(
+    message: string,
+    public code: string,
+    public userMessage?: string
+  ) {
+    super(message);
+    this.name = 'AppError';
+  }
+}
+
+export const handleError = (
+  error: unknown,
+  context: ErrorContext
+): void => {
+  const errorMessage = error instanceof AppError 
+    ? error.userMessage || error.message
+    : error instanceof Error 
+    ? error.message 
+    : 'An unexpected error occurred';
+
+  // Log to console/monitoring
+  logger.error('Error occurred', {
+    ...context,
+    error: error instanceof Error ? error.message : String(error),
+    stack: error instanceof Error ? error.stack : undefined
+  });
+
+  // Show user-friendly toast
+  toast.error(context.action, {
+    description: errorMessage,
+    duration: 5000
+  });
+};
+
+export const handleSuccess = (
+  title: string,
+  description?: string
+): void => {
+  toast.success(title, {
+    description,
+    duration: 3000
+  });
+};
+
+export const handleInfo = (
+  title: string,
+  description?: string
+): void => {
+  toast.info(title, {
+    description,
+    duration: 4000
+  });
+};