fix(i18n): label the contact name field with its own key

The Details tab rendered `t("company")` above the name input, so the
panel showed "Company" twice and the name field carried the wrong
label — in English as well as Korean. There was no
`Contacts.detailView.name` key at all; the call papered over it with
`{ fallback: "Name" }`, which next-intl ignores (the second argument
is ICU values, not options).

Add the missing key to both catalogues, point the label at it, and
drop the two decorative `fallback` arguments so the remaining call
sites read as what they are.

messages/en.json

@@ -371,6 +371,7 @@
       "contactInfo": "Contact Information",
       "unnamed": "Unknown",
       "contactDetailsDesc": "Contact details",
+      "name": "Name",
       "phone": "Phone",
       "email": "Email",
       "company": "Company",

messages/ko.json

@@ -371,6 +371,7 @@
       "contactInfo": "연락처 정보",
       "unnamed": "알 수 없음",
       "contactDetailsDesc": "연락처 정보",
+      "name": "이름",
       "phone": "전화번호",
       "email": "이메일",
       "company": "회사",

src/components/contacts/contact-detail-view.tsx

@@ -462,7 +462,7 @@ export function ContactDetailView({
                   value="tags"
                   className="data-active:bg-muted data-active:text-primary text-muted-foreground"
                 >
-                  {t('tabs.tags', { fallback: 'Tags' })}
+                  {t('tabs.tags')}
                 </TabsTrigger>
                 <TabsTrigger
                   value="notes"
@@ -488,7 +488,7 @@ export function ContactDetailView({
               <TabsContent value="details" className="flex-1 overflow-y-auto px-4 py-3">
                 <div className="space-y-3">
                   <div className="space-y-1.5">
-                    <Label className="text-muted-foreground text-xs">{t('company', { fallback: 'Name' })}</Label>
+                    <Label className="text-muted-foreground text-xs">{t('name')}</Label>
                     <Input
                       value={editName}
                       onChange={(e) => setEditName(e.target.value)}