Session UX: inline password prompt and terminal font size controls

Replace the modal RDP/SSH password dialog with an inline prompt bar
embedded in the session tab instead of a separate popup window. Add
per-tab terminal font size controls (increase/decrease/reset/set
exact point size) via the tab context menu, with the chosen size
persisted across sessions.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/session_tab.h

@@ -8,6 +8,7 @@
 #include <QStringList>
 #include <QtGlobal>
 
+#include <functional>
 #include <optional>
 #include <vector>
 
@@ -19,12 +20,15 @@ class RdpDisplayWidget;
 class QToolButton;
 class QLineEdit;
 class QComboBox;
+class QLabel;
+class QPushButton;
 class KodoTerm;
 
 struct SessionUiPreferences
 {
     QString terminalThemeName = QStringLiteral("Dark");
     bool eventsPanelExpanded = false;
+    int terminalFontPointSize = 0;
 };
 
 class SessionTab : public QWidget
@@ -46,6 +50,12 @@ public:
     QString terminalThemeName() const;
     bool supportsThemeSelection() const;
     bool supportsClearAction() const;
+    bool supportsZoom() const;
+    void zoomIn();
+    void zoomOut();
+    void resetZoom();
+    void setTerminalFontPointSize(int pointSize);
+    int terminalFontPointSize() const;
     bool isEventsPanelExpanded() const;
     void setEventsPanelExpanded(bool expanded);
     void clearEvents();
@@ -56,6 +66,7 @@ signals:
     void tabTitleChanged(const QString& title);
     void tabStateChanged(SessionState state);
     void terminalThemeChanged(const QString& themeName);
+    void terminalFontSizeChanged(int pointSize);
     void eventsPanelVisibilityChanged(bool expanded);
     void requestConnect(const SessionConnectOptions& options);
     void requestDisconnect();
@@ -88,6 +99,7 @@ private:
     QString m_lastError;
     SessionConnectOptions m_lastConnectOptions;
     QString m_terminalThemeName;
+    int m_terminalFontPointSize;
 
     KodoTerm* m_sshTerminal;
     RdpDisplayWidget* m_rdpDisplay;
@@ -99,6 +111,12 @@ private:
     QToolButton* m_clearEventsButton;
     QToolButton* m_exportEventsButton;
     QWidget* m_eventsPanel;
+    QWidget* m_passwordPromptBar;
+    QLabel* m_passwordPromptLabel;
+    QLineEdit* m_passwordPromptInput;
+    QPushButton* m_passwordPromptConnectButton;
+    QPushButton* m_passwordPromptCancelButton;
+    std::function<void(std::optional<QString>)> m_passwordPromptCallback;
     enum class EventSeverity {
         Info,
         Warning,
@@ -114,7 +132,10 @@ private:
     bool m_eventsPanelExpanded;
 
     void setupUi();
-    std::optional<SessionConnectOptions> buildConnectOptions();
+    void requestConnectOptions(std::function<void(std::optional<SessionConnectOptions>)> callback);
+    void showPasswordPrompt(const QString& labelText,
+                            std::function<void(std::optional<QString>)> callback);
+    void hidePasswordPrompt();
     bool validateProfileForConnect();
     void appendEvent(const QString& message);
     void setState(SessionState state, const QString& message);