Start Milestone 4 interactive SSH terminal and host-key flow

src/session_tab.h

@@ -9,6 +9,7 @@
 #include <optional>
 
 class QLabel;
+class QLineEdit;
 class QPlainTextEdit;
 class QPushButton;
 class QThread;
@@ -29,16 +30,22 @@ signals:
     void requestConnect(const SessionConnectOptions& options);
     void requestDisconnect();
     void requestReconnect(const SessionConnectOptions& options);
+    void requestInput(const QString& input);
+    void requestHostKeyConfirmation(bool trustHost);
 
 private slots:
     void onConnectClicked();
     void onDisconnectClicked();
     void onReconnectClicked();
     void onCopyErrorClicked();
+    void onSendInputClicked();
+    void onClearTerminalClicked();
 
     void onBackendStateChanged(SessionState state, const QString& message);
     void onBackendEventLogged(const QString& message);
     void onBackendConnectionError(const QString& displayMessage, const QString& rawMessage);
+    void onBackendOutputReceived(const QString& text);
+    void onBackendHostKeyConfirmationRequested(const QString& prompt);
 
 private:
     Profile m_profile;
@@ -49,11 +56,15 @@ private:
 
     QLabel* m_statusLabel;
     QLabel* m_errorLabel;
+    QPlainTextEdit* m_terminalOutput;
+    QLineEdit* m_terminalInput;
     QPlainTextEdit* m_eventLog;
     QPushButton* m_connectButton;
     QPushButton* m_disconnectButton;
     QPushButton* m_reconnectButton;
     QPushButton* m_copyErrorButton;
+    QPushButton* m_sendInputButton;
+    QPushButton* m_clearTerminalButton;
 
     void setupUi();
     std::optional<SessionConnectOptions> buildConnectOptions();