feat: add notifications page and update navigation to redirect notifications to a dedicated route

src/app/investor/profile/page.tsx

@@ -128,7 +128,7 @@ export default function InvestorProfilePage() {
     <div className="min-h-screen lg:pt-6 pt-0">
       <InvestorNotification isMobile />
       <div className="pt-18 lg:pt-0 p-4 sm:p-5 bg-slate-50 min-h-screen">
-        <div className="max-w-8xl mx-auto">
+        <div className="max-w-8xl mx-auto mb-12 lg:mb-0">
           {/* Profile Header */}
           <div className="bg-white rounded-xl shadow-sm border border-slate-100 overflow-hidden mb-4 sm:mb-6">
             <div className="p-4 sm:p-5 flex flex-col sm:flex-row items-start gap-4 sm:gap-5">