fix: support cmd+k to open the search modal

[B4nan]

Also opens the kapa widget with the AI chat tab first.

Closes #1745

[apify-service-account]

Preview for this PR was built for commit b48a83b and is ready at https://pr-1755.preview.docs.apify.com!

[TC-MO]

LGTM, tested both windows & mac

[cursor]

Bug: Search Modal Stuck Open on Widget Failures

The opened state, which prevents re-opening the search modal, is incorrectly left as true if the modal fails to open. This occurs when the Kapa or Inkeep widgets are unavailable, or an unknown search variant is encountered, as the onClick handler exits without resetting the state. Consequently, the search modal cannot be opened again until a page refresh.

apify-docs-theme/src/theme/SearchBar/index.js#L200-L203

apify-docs/apify-docs-theme/src/theme/SearchBar/index.js

Lines 200 to 203 in b48a83b

	modal.update({ modalSettings: { isOpen: true } });
	} else {
	console.error('Inkeep widget is not available.');
	}

apify-docs-theme/src/theme/SearchBar/index.js#L119-L123

apify-docs/apify-docs-theme/src/theme/SearchBar/index.js

Lines 119 to 123 in b48a83b

	if (variant !== 'inkeep') {
	console.warn('Unknown search variant:', variant);
	return;
	}

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[cursor]

Bug: SearchBar Prop Ignored, State Not Reset

The SearchBar component reassigns its onClick prop, effectively ignoring any onClick handler passed from parent components. Additionally, the opened state, which prevents multiple modal openings, is not reset to false if the Kapa or Inkeep search widgets fail to open. This leaves the search bar permanently unresponsive until the page is refreshed.

[cursor]

Bug: Kapa.ai Integration Causes Search Bar Issues

The search bar component exhibits two issues related to the Kapa.ai integration:

1. Opening the Kapa modal repeatedly registers new onModalClose event listeners, leading to multiple setOpened(false) calls and potential memory leaks when the modal closes.
2. If the Kapa.ai widget is unavailable, the opened state is set to true but never reset to false, permanently preventing any subsequent attempts to open the search modal.