fix(link-checker): guard visibility reload against missing installation match [ES-524]

When getForOrganization returns no match for the current space/environment,
match is undefined and deepEqual(undefined, params) always returns false,
causing a page reload every time the user switches back to the tab. This
wiped in-progress scan results, explaining both the "links disappear on
tab switch" and "page freezes/resets at ~14,670 links" symptoms. Only
reload when a match is found AND its parameters differ from the current
installation.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: harikakondur

apps/link-checker/components/locations/Page.tsx

@@ -195,7 +195,7 @@ export default function Page() {
             item.sys.space.sys.id === sdk.ids.space &&
             item.sys.environment.sys.id === sdk.ids.environment
         );
-        if (!deepEqual(match?.parameters, sdk.parameters.installation)) {
+        if (match && !deepEqual(match.parameters, sdk.parameters.installation)) {
           window.location.reload();
         }
       } catch {