Lots of updates:

1. Scrolling and click to set the cursor works.
2. GUI now uses Brass Mono as the font.
3. A lot of stability and other updates.

TerminalInputHandler.h

@@ -8,9 +8,11 @@
 
 #include "InputHandler.h"
 
-class TerminalInputHandler : public InputHandler {
+
+class TerminalInputHandler final : public InputHandler {
 public:
     TerminalInputHandler();
+
     ~TerminalInputHandler() override;
 
     bool Poll(MappedInput &out) override;
@@ -20,6 +22,8 @@ private:
 
     // ke-style prefix state
     bool k_prefix_ = false; // true after C-k until next key or ESC
+    // Simple meta (ESC) state for ESC sequences like ESC b/f
+    bool esc_meta_ = false;
 };
 
 #endif // KTE_TERMINAL_INPUT_HANDLER_H