B2C/B2B split: DEFAULT_USER_TIER, ALLOWED_DOMAINS, zero-price filter, InboxRescue branding & pricing page

Agent-Logs-Url: https://github.com/christianlouis/pop_puller_to_gmail/sessions/98c1f90b-0287-4908-a0be-ad066c453cc5

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

frontend/src/components/DashboardLayout.tsx

@@ -54,7 +54,7 @@ export function DashboardLayout({ children }: DashboardLayoutProps) {
       <div className="hidden lg:fixed lg:inset-y-0 lg:flex lg:w-64 lg:flex-col">
         <div className="flex flex-col flex-grow bg-white border-r border-gray-200">
           <div className="flex items-center h-16 flex-shrink-0 px-4 border-b border-gray-200">
-            <h1 className="text-xl font-bold text-gray-900">POP3 Forwarder</h1>
+            <h1 className="text-xl font-bold text-gray-900">InboxRescue</h1>
           </div>
           <nav className="flex-1 px-2 py-4 space-y-1">
             {navigation.map((item) => {
@@ -117,7 +117,7 @@ export function DashboardLayout({ children }: DashboardLayoutProps) {
           <div className="fixed inset-0 bg-gray-600/75" onClick={() => setSidebarOpen(false)} />
           <div className="fixed inset-y-0 left-0 flex w-64 flex-col bg-white">
             <div className="flex items-center justify-between h-16 px-4 border-b border-gray-200">
-              <h1 className="text-xl font-bold text-gray-900">POP3 Forwarder</h1>
+              <h1 className="text-xl font-bold text-gray-900">InboxRescue</h1>
               <button onClick={() => setSidebarOpen(false)} className="text-gray-500 hover:text-gray-700">
                 <X className="h-6 w-6" />
               </button>