Refactor: Remove unused structs, redundant services, and streamline repository models

app/page.tsx

@@ -561,18 +561,18 @@ function ScribeContent() {
                             try {
                                 await tauri.syncUser({
                                     userId: user.id,
-                                    firstName: user.name,
-                                    lastName: user.lastName,
                                     username: user.username,
                                     email: user.email
                                 });
                             } catch (syncError) {
+                                console.error('[Page] syncUser failed:', syncError);
                                 errorMessage(t("homePage.errors.syncError"));
                             }
                         } else {
                             errorMessage(t("homePage.errors.dbInitError"));
                         }
                     } catch (error) {
+                        console.error('[Page] DB init or sync failed:', error);
                         errorMessage(t("homePage.errors.syncError"));
                     }
                 }