refactor: straightened logic, replaces throttle with mantine debounced

src/app/deals/contexts/ProjectsContext.tsx

@@ -35,12 +35,12 @@ const useProjectsContextState = () => {
                         project => project.id === selectedProject.id
                     ) ?? null
                 );
-            } else {
-                setSelectedProject(projects[0]);
+                return;
             }
-        } else {
-            setSelectedProject(null);
+            setSelectedProject(projects[0]);
+            return;
         }
+        setSelectedProject(null);
     }, [projects]);
 
     return {