Implement strict type enforcement plan

src/components/privacy/BlockedUsers.tsx

@@ -118,11 +118,11 @@ export function BlockedUsers() {
         user_id: user.id,
         changed_by: user.id,
         action: 'user_unblocked',
-        changes: {
+        changes: JSON.parse(JSON.stringify({
           blocked_user_id: blockedUserId,
           username,
           timestamp: new Date().toISOString()
-        } as any
+        }))
       }]);
 
       setBlockedUsers(prev => prev.filter(block => block.id !== blockId));