fix: ctrl-k behavior on macOS (#2052)

* Improve cmd-k / ctrl-k behavior

Use cmd-k on macOS/iOS for search and keep ctrl-k everywhere else.

Fixes a bug where ctrl-k on macOS, which cuts to the end of the line,
was also triggering the search prompt.

* comment submit: cmd-enter (mac) / ctrl-enter (win/linux)

apps/client/src/features/editor/page-editor.tsx

@@ -62,7 +62,7 @@ import { useIdle } from "@/hooks/use-idle.ts";
 import { queryClient } from "@/main.tsx";
 import { IPage } from "@/features/page/types/page.types.ts";
 import { useParams } from "react-router-dom";
-import { extractPageSlugId } from "@/lib";
+import { extractPageSlugId, platformModifierKey } from "@/lib";
 import { FIVE_MINUTES } from "@/lib/constants.ts";
 import { PageEditMode } from "@/features/user/types/user.types.ts";
 import { jwtDecode } from "jwt-decode";
@@ -232,11 +232,11 @@ export default function PageEditor({
         scrollMargin: 80,
         handleDOMEvents: {
           keydown: (_view, event) => {
-            if ((event.ctrlKey || event.metaKey) && event.code === "KeyS") {
+            if (platformModifierKey(event) && event.code === "KeyS") {
               event.preventDefault();
               return true;
             }
-            if ((event.ctrlKey || event.metaKey) && event.code === "KeyK") {
+            if (platformModifierKey(event) && event.code === "KeyK") {
               searchSpotlight.open();
               return true;
             }