chat : add close-tab keyboard shortcut

Assisted-by: pi

tools/ui/src/lib/enums/keyboard.enums.ts

@@ -16,5 +16,7 @@ export enum KeyboardKey {
 	O_LOWER = 'o',
 	O_UPPER = 'O',
 	SPACE = ' ',
-	TAB = 'Tab'
+	TAB = 'Tab',
+	X_LOWER = 'x',
+	X_UPPER = 'X'
 }

tools/ui/src/lib/hooks/use-keyboard-shortcuts.svelte.ts

@@ -1,5 +1,6 @@
+import { page } from '$app/state';
 import { KeyboardKey } from '$lib/enums';
-import { conversationsStore } from '$lib/stores';
+import { conversationsStore, NEW_CHAT_TAB_ID, settingsStore, tabsStore } from '$lib/stores';
 
 interface KeyboardShortcutsCallbacks {
 	activateSearchMode?: () => void;
@@ -41,6 +42,28 @@ export function useKeyboardShortcuts(callbacks: KeyboardShortcutsCallbacks) {
 			callbacks.editActiveConversation?.();
 		}
 
+		if (
+			event.shiftKey &&
+			isCmdOrCtrl &&
+			(event.key === KeyboardKey.X_LOWER || event.key === KeyboardKey.X_UPPER)
+		) {
+			// several components register this shortcut; only let the first handler
+			// act so the synchronous navigation does not cascade-close every tab
+			if (event.defaultPrevented) return;
+
+			event.preventDefault();
+
+			// close-tab only makes sense with conversation tabs enabled
+			if (!settingsStore.config.conversationTabs) return;
+
+			const activeId =
+				page.params.id ?? (page.route.id === '/(chat)' ? NEW_CHAT_TAB_ID : undefined);
+
+			if (activeId) {
+				void tabsStore.close(activeId, activeId);
+			}
+		}
+
 		if (
 			isCmdOrCtrl &&
 			event.shiftKey &&