Basic new file work, some graphics glitches fixed.

KKeymap.h

@@ -0,0 +1,26 @@
+/*
+ * KKeymap.h - mapping for k-command (C-k prefix) keys to CommandId
+ */
+#ifndef KTE_KKEYMAP_H
+#define KTE_KKEYMAP_H
+
+#include "Command.h"
+#include <cctype>
+
+// Lookup the command to execute after a C-k prefix.
+// Parameters:
+//  - ascii_key: ASCII code of the key, preferably lowercased if it's a letter.
+//  - ctrl: whether Control modifier was held for this key (e.g., C-k C-x).
+// Returns true and sets out if a mapping exists; false otherwise.
+bool KLookupKCommand(int ascii_key, bool ctrl, CommandId &out);
+
+// Utility: normalize an int keycode to lowercased ASCII if it's in printable range.
+inline int
+KLowerAscii(const int key)
+{
+	if (key >= 'A' && key <= 'Z')
+		return key + ('a' - 'A');
+	return key;
+}
+
+#endif // KTE_KKEYMAP_H