Link the project site from inside the app

ihasmail.org was linked only from the login screen footer -- a page a signed-in
user sees once and then never again. From inside the app there was no way back
to the project site at all; Documentation went to docs.ihasmail.org and that
was the whole of it.

"About ihasmail" now sits under Documentation in the account menu, where
somebody looking for what this thing is would actually go.

web/src/views/AppShell.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useState, type ReactNode } from "react";
 import { Link, useLocation } from "wouter";
-import { BookOpen, Calendar, ChevronsUpDown, FolderOpen, HelpCircle, LogOut, Mail, Menu as MenuIcon, Moon, PenSquare, Plus, RefreshCw, Settings, Sun, Upload, Users } from "lucide-react";
+import { BookOpen, Calendar, ChevronsUpDown, FolderOpen, Globe, HelpCircle, LogOut, Mail, Menu as MenuIcon, Moon, PenSquare, Plus, RefreshCw, Settings, Sun, Upload, Users } from "lucide-react";
 import { useSession } from "@/store/session";
 import { toggleTarget, useEffectiveTheme, useSettings } from "@/store/settings";
 import { useMail } from "@/store/mail";
@@ -102,6 +102,10 @@ export function AppShell({ children }: { children: ReactNode }) {
             </div>
             <MenuSep />
             <MenuItem icon={<BookOpen size={16} />} label="Documentation" href="https://docs.ihasmail.org" external />
+            {/* The project site. It is linked from the login screen footer, which
+                is a page a signed-in user never sees again -- so from inside the
+                app there was no way back to it. */}
+            <MenuItem icon={<Globe size={16} />} label="About ihasmail" href="https://ihasmail.org" external />
             <MenuItem icon={<Settings size={16} />} label="Settings" onClick={() => navigate("/settings")} />
             <MenuItem icon={<RefreshCw size={16} />} label="Refresh" onClick={() => window.location.reload()} />
             <MenuItem icon={<LogOut size={16} />} label="Sign out" onClick={() => void logout()} />