feat: add show/hide and copy for API keys on dev page

- Display client key and server key on Settings app cards with toggle
  visibility and copy button
- Hide API keys table in Desa Mandiri Keys tab behind toggle + copy
- Add eye toggle to password inputs in Add App and Edit API Config
  modals
- Backend now returns apiKey and clientApiKey in apps list endpoint

src/app.ts

@@ -370,6 +370,8 @@ export function createApp() {
         errors: app.bugs.length,
         active: app.active,
         urlApi: app.urlApi,
+        apiKey: app.apiKey ?? '',
+        clientApiKey: app.clientApiKey ?? '',
         hasClientApiKey: !!app.clientApiKey,
       }))
     }, {