Improve ADB Keyboard activation reliability:

- Add retries for `ime enable` to handle delayed IME registration after installation.
- Introduce flag to distinguish newly installed keyboards for adaptive retry logic.

android/adb/AdbUtils.cpp

@@ -343,6 +343,7 @@ bool AdbUtils::enableAdbIMEKeyboard(const QString &deviceId) {
     // Проверяем, установлен ли ADB Keyboard
     QString installedList;
     startProcess(adb, {"-s", deviceId, "shell", "pm", "list", "packages", "com.android.adbkeyboard"}, &installedList);
+    bool freshlyInstalled = false;
     if (!installedList.contains("com.android.adbkeyboard")) {
         const QString apkPath = QCoreApplication::applicationDirPath() + "/assets/ADBKeyboard.apk";
         qDebug() << "[AdbUtils] ADB Keyboard not installed, installing from:" << apkPath;
@@ -352,6 +353,7 @@ bool AdbUtils::enableAdbIMEKeyboard(const QString &deviceId) {
             return false;
         }
         qDebug() << "[AdbUtils] ADB Keyboard installed successfully";
+        freshlyInstalled = true;
     }
 
     // Пакет мог быть отключён производителем (pm disable-user).
@@ -365,14 +367,28 @@ bool AdbUtils::enableAdbIMEKeyboard(const QString &deviceId) {
         }
     }
 
-    // ime enable
-    {
+    // ime enable с retry: сразу после 'pm install' InputMethodManagerService
+    // может ещё не подхватить новый IME и возвращать "Unknown input method ... cannot be enabled".
+    // Ретраим до появления IME в списке всех зарегистрированных (ime list -a).
+    const int enableAttempts = freshlyInstalled ? 10 : 3;
+    bool imeEnabled = false;
+    QString lastErr;
+    for (int attempt = 0; attempt < enableAttempts; ++attempt) {
         QString out, err;
-        if (!startProcess(adb, {"-s", deviceId, "shell", "ime", "enable", imeId}, &out, &err)) {
-            qWarning() << "[AdbUtils] ime enable failed:" << err.trimmed();
-            return false;
+        if (startProcess(adb, {"-s", deviceId, "shell", "ime", "enable", imeId}, &out, &err)) {
+            qDebug() << "[AdbUtils] ime enable:" << out.trimmed();
+            imeEnabled = true;
+            break;
         }
-        qDebug() << "[AdbUtils] ime enable:" << out.trimmed();
+        lastErr = err.trimmed();
+        qDebug() << "[AdbUtils] ime enable attempt" << attempt + 1 << "/" << enableAttempts
+                 << "failed:" << lastErr << "— ждём, пока IMMS перечитает IME";
+        QThread::msleep(1000);
+    }
+    if (!imeEnabled) {
+        qWarning() << "[AdbUtils] ime enable failed after" << enableAttempts
+                   << "attempts. Last error:" << lastErr;
+        return false;
     }
 
     // Верификация: IME должен появиться в списке разрешённых