fix(editor): corrected editor consuming rebound copy keys preventing custom bindings

- Fixed editor consuming user-rebound copy keys, preventing custom keybindings from working.
- Changed copy key detection from generic `tui.input.copy` binding to explicit `ctrl+c` check to avoid swallowing user-rebound keys.
- Added test case verifying editor does not consume keys rebound to copy action.

packages/tui/CHANGELOG.md

@@ -1,10 +1,15 @@
 # Changelog
 
 ## [Unreleased]
+
 ### Added
 
 - Added `renderInlineMarkdown()` function to render inline markdown (bold, italic, code, links, strikethrough) to styled strings
 
+### Fixed
+
+- Fixed editor consuming user-rebound copy keys, preventing custom keybindings from working in the editor
+
 ## [13.14.1] - 2026-03-21
 ### Added
 

packages/tui/src/components/editor.ts

@@ -732,8 +732,10 @@ export class Editor implements Component, Focusable {
 
 		// Handle special key combinations first
 
-		// Ctrl+C - Exit (let parent handle this)
-		if (kb.matches(data, "tui.input.copy")) {
+		// Ctrl+C is reserved by parent components for app-level handling.
+		// Do not consume arbitrary user-bound "copy" keys here, since the editor
+		// has no copy implementation and would make those keys disappear.
+		if (matchesKey(data, "ctrl+c")) {
 			return;
 		}
 

packages/tui/test/editor.test.ts

@@ -1356,6 +1356,23 @@ describe("Editor component", () => {
 			expect(editor.getCursor()).toEqual({ line: 0, col: 0 });
 		});
 
+		it("does not swallow keys rebound to copy", () => {
+			setKeybindings(
+				new KeybindingsManager(TUI_KEYBINDINGS, {
+					"tui.input.copy": "left",
+				}),
+			);
+
+			const editor = new Editor(defaultEditorTheme);
+			editor.setText("ab");
+
+			editor.handleInput("\x1b[D"); // Left arrow
+			editor.handleInput("X");
+
+			expect(editor.getText()).toBe("aXb");
+			expect(editor.getCursor()).toEqual({ line: 0, col: 2 });
+		});
+
 		it("undoes the last paste when a transient #undo trigger is executed", () => {
 			const editor = new Editor(defaultEditorTheme);