Fix: Resolve type errors in page components

src/lib/typeAssertions.ts

@@ -0,0 +1,22 @@
+/**
+ * Type assertion helpers for TypeScript strict mode compatibility
+ * These help bridge database types (null) with application types (undefined)
+ */
+
+export function nullToUndefined<T>(value: T | null): T | undefined {
+  return value === null ? undefined : value;
+}
+
+export function convertNullsToUndefined<T extends Record<string, any>>(obj: T): { [K in keyof T]: T[K] extends (infer U | null) ? (U | undefined) : T[K] } {
+  const result: any = {};
+  for (const key in obj) {
+    const value = obj[key];
+    result[key] = value === null ? undefined : value;
+  }
+  return result;
+}
+
+// Type guard for checking if value is not null/undefined
+export function isDefined<T>(value: T | null | undefined): value is T {
+  return value !== null && value !== undefined;
+}