fix(tui): honor tui.input.submit remap onto ctrl+enter

The multiline editor's key dispatch checked a hardcoded Ctrl/Shift+Enter
-> newline branch before the config-driven tui.input.submit branch, so a
user remap of submit onto Ctrl+Enter was swallowed as a newline and never
submitted. Gate the hardcoded newline fallbacks behind an explicit submit
binding; the bare-LF (iTerm2 Shift+Enter) case stays exempt because its
canonical form is indistinguishable from plain Enter.

Fixes #8906

packages/tui/CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixed
 
 - Fixed images rendering as the `[Image: …]` text card on SIXEL terminals that expose no identifying environment variable (foot, xterm, contour): the graphics probe no longer requires Windows Terminal, and no longer reads an XTSMGRAPHICS success reply as a failure.
+- Fixed the multiline editor ignoring a `tui.input.submit` remap onto Ctrl+Enter: the hardcoded Ctrl/Shift+Enter → newline fallbacks now yield to an explicit submit binding, so Ctrl+Enter can be used to submit ([#8906](https://github.com/can1357/oh-my-pi/issues/8906)).
 
 ## [17.3.5] - 2026-08-16
 

packages/tui/src/components/editor.ts

@@ -1458,14 +1458,19 @@ export class Editor implements Component, Focusable {
 				this.#addNewLine();
 			}
 		}
-		// New line
+		// New line. A key the user explicitly bound to `tui.input.submit` wins
+		// over these hardcoded newline fallbacks, so Ctrl/Shift+Enter can be
+		// remapped to submit (#8906). The bare-LF case is exempt: its canonical
+		// form is "enter" (indistinguishable from plain Enter), so gating it
+		// would hijack the default Enter=submit binding.
 		else if (
-			(data.charCodeAt(0) === 10 && data.length > 1) || // Ctrl+Enter with modifiers
-			matchesKey(data, "ctrl+enter") || // Ctrl+Enter (Kitty/modifyOtherKeys, including lock bits/keypad Enter)
-			data === "\x1b\r" || // Option+Enter in some terminals (legacy)
-			data === "\x1b[13;2~" || // Shift+Enter in some terminals (legacy format)
-			kb.matchesCanonical(canonical, "tui.input.newLine") || // Shift+Enter (Kitty protocol, handles lock bits)
-			(data.length > 1 && data.includes("\x1b") && data.includes("\r")) ||
+			(!kb.matchesCanonical(canonical, "tui.input.submit") &&
+				((data.charCodeAt(0) === 10 && data.length > 1) || // Ctrl+Enter with modifiers
+					matchesKey(data, "ctrl+enter") || // Ctrl+Enter (Kitty/modifyOtherKeys, including lock bits/keypad Enter)
+					data === "\x1b\r" || // Option+Enter in some terminals (legacy)
+					data === "\x1b[13;2~" || // Shift+Enter in some terminals (legacy format)
+					kb.matchesCanonical(canonical, "tui.input.newLine") || // Shift+Enter (Kitty protocol, handles lock bits)
+					(data.length > 1 && data.includes("\x1b") && data.includes("\r")))) ||
 			(data === "\n" && data.length === 1) // Shift+Enter from iTerm2 mapping
 		) {
 			if (this.#shouldSubmitOnBackslashEnter(data, kb)) {

packages/tui/test/editor.test.ts

@@ -164,6 +164,38 @@ describe("Editor component", () => {
 		});
 	});
 
+	describe("Submit/newline keybindings", () => {
+		it("submits on Ctrl+Enter when tui.input.submit is remapped to it (#8906)", () => {
+			setKeybindings(
+				new KeybindingsManager(TUI_KEYBINDINGS, {
+					"tui.input.submit": "ctrl+enter",
+					"tui.input.newLine": "enter",
+				}),
+			);
+			const editor = new Editor(defaultEditorTheme);
+			editor.setText("hello");
+			let submitted: string | undefined;
+			editor.onSubmit = text => {
+				submitted = text;
+			};
+			editor.handleInput("\x1b[13;5u"); // kitty CSI-u Ctrl+Enter
+			expect(submitted).toBe("hello");
+			expect(editor.getText()).toBe("");
+		});
+
+		it("still inserts a newline on Ctrl+Enter under the default bindings", () => {
+			const editor = new Editor(defaultEditorTheme);
+			editor.setText("hello");
+			let submitted: string | undefined;
+			editor.onSubmit = text => {
+				submitted = text;
+			};
+			editor.handleInput("\x1b[13;5u"); // kitty CSI-u Ctrl+Enter
+			expect(submitted).toBeUndefined();
+			expect(editor.getText()).toBe("hello\n");
+		});
+	});
+
 	describe("Prompt history navigation", () => {
 		it("does nothing on Up arrow when history is empty", () => {
 			const editor = new Editor(defaultEditorTheme);