feat: IMAP sync incremental + Account Setup Wizard + robust FETCH parser

- ImapSynchronizer::syncFolder(): detecta eliminados (UIDs locales no en servidor), fetch nuevos (sinceUid), actualiza flags (FLAGS batch)
- fetchAllUids(): SELECT + SEARCH ALL para lista completa UIDs servidor
- parseAndUpdateFlags(): FETCH FLAGS en lotes 100, update DB si cambió read/flagged
- AccountSetupDialog: integra ConnectionWizard para IMAP/POP3 con test de conexión real
- IMAP FETCH parser robusto: logging respuesta servidor + fallback UID-by-UID
- Fix: FETCH failed logging muestra first/last UID + respuesta truncada

src/core/accountsetupdialoglauncher.cpp

@@ -17,24 +17,26 @@ void AccountSetupDialogLauncher::setupAccountManually(const Account &account)
 {
     qDebug() << "[AccountSetupDialogLauncher] Setting up account:" << account.email();
 
-    // Save to database
-    bool created = AccountDao::insert(account);
-    if (!created) {
+    // Save to database and retain the generated id for the synchronizer/event.
+    const qint64 id = AccountDao::insert(account);
+    if (id < 0) {
         qWarning() << "[AccountSetupDialogLauncher] Failed to save account to DB";
         emit accountSetupFailed("Failed to save account");
         return;
     }
+    Account storedAccount = account;
+    storedAccount.setId(static_cast<int>(id));
 
     // Initialize synchronizer
-    initializeSynchronizer(account);
+    initializeSynchronizer(storedAccount);
 
     // Publish event
     WinoMail::Events::AccountAddedEvent event;
-    event.account = account;
+    event.account = storedAccount;
     EVENT_BUS.publish(event);
 
     qDebug() << "[AccountSetupDialogLauncher] Account created successfully:" << account.email();
-    emit accountSetupCompleted(account);
+    emit accountSetupCompleted(storedAccount);
 }
 
 void AccountSetupDialogLauncher::initializeSynchronizer(const Account &account)