Basic shell working.

TerminalInputHandler.h

@@ -0,0 +1,25 @@
+/*
+ * TerminalInputHandler - ncurses-based input handling for terminal mode
+ */
+#ifndef KTE_TERMINAL_INPUT_HANDLER_H
+#define KTE_TERMINAL_INPUT_HANDLER_H
+
+#include <cstdint>
+
+#include "InputHandler.h"
+
+class TerminalInputHandler : public InputHandler {
+public:
+    TerminalInputHandler();
+    ~TerminalInputHandler() override;
+
+    bool Poll(MappedInput &out) override;
+
+private:
+    bool decode_(MappedInput &out);
+
+    // ke-style prefix state
+    bool k_prefix_ = false; // true after C-k until next key or ESC
+};
+
+#endif // KTE_TERMINAL_INPUT_HANDLER_H