fix: API key generation button - URL mismatch (apikey → api-key)

Frontend was calling /api/user/apikey but backend route is /api/user/api-key.
Button did nothing because requests returned 404.

client/src/components/admin/McpSettingsCard.tsx

@@ -27,7 +27,7 @@ export function McpSettingsCard() {
     // Feature 2: API Key Mutations
     const generateApiKeyMutation = useMutation({
         mutationFn: async () => {
-            const res = await apiRequest("POST", "/api/user/apikey", {});
+            const res = await apiRequest("POST", "/api/user/api-key", {});
             return res.json();
         },
         onSuccess: (data) => {
@@ -38,7 +38,7 @@ export function McpSettingsCard() {
 
     const revokeApiKeyMutation = useMutation({
         mutationFn: async () => {
-            await apiRequest("DELETE", "/api/user/apikey");
+            await apiRequest("DELETE", "/api/user/api-key");
         },
         onSuccess: () => {
             queryClient.invalidateQueries({ queryKey: ["/api/user"] });