Add menu item allergens, drop nav Help link, animate customizer price

- Menu items can now list allergens (shared catalog + join table),
  shown on the menu grid and item detail pages when applicable, and
  editable from the admin menu item form.
- Removed the top-nav "Help" link now that the footer links to it.
- The item customization page's price now uses the sliding
  AnimatedNumber, matching the basket line price.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/routes/admin/menu/new.tsx

@@ -2,10 +2,14 @@ import { createFileRoute, useNavigate } from '@tanstack/react-router'
 
 import { MenuItemForm } from '#/components/admin/MenuItemForm.tsx'
 import { withAdminGuard } from '#/lib/admin-guard.ts'
-import { createMenuItem, getMachineTagOptions } from '#/server/menu-admin.ts'
+import {
+  createMenuItem,
+  getAllergenOptions,
+  getMachineTagOptions,
+} from '#/server/menu-admin.ts'
 
 const NewMenuItemRoute = () => {
-  const machineTags = Route.useLoaderData()
+  const { machineTags, allergenOptions } = Route.useLoaderData()
   const navigate = useNavigate()
 
   return (
@@ -13,6 +17,7 @@ const NewMenuItemRoute = () => {
       <h1>Add menu item</h1>
       <MenuItemForm
         machineTags={machineTags}
+        allergenOptions={allergenOptions}
         submitLabel="Create item"
         onSubmit={async (input) => {
           await createMenuItem({ data: input })
@@ -24,6 +29,10 @@ const NewMenuItemRoute = () => {
 }
 
 export const Route = createFileRoute('/admin/menu/new')({
-  loader: () => withAdminGuard(() => getMachineTagOptions()),
+  loader: () =>
+    withAdminGuard(async () => ({
+      machineTags: await getMachineTagOptions(),
+      allergenOptions: await getAllergenOptions(),
+    })),
   component: NewMenuItemRoute,
 })