Avoid duplicate tab search requests

[slick-daddy]

When searching from the global search page, SearchLayout previously executed the combined SearchAll query for every search route.

That caused redundant work on dedicated tabs:

• /search/performers?q=... executed both SearchAll and SearchPerformers.
• /search/scenes?q=... executed both SearchAll and SearchScenes.
• SearchAll searches both performers and scenes, even when only one result type is being displayed.

Changes

• Detect whether the current route is the exact /search All tab.
• Run SearchAll only on the All tab.
• Keep SearchPerformers responsible for performer-tab results and counts.
• Keep SearchScenes responsible for scene-tab results and counts.
• Pass dedicated-tab counts back to SearchLayout through typed React Router outlet context so navigation badges remain available.
• Preserve the existing search term, pagination, performer filters, result rendering, and All-tab behavior.

Result

Opening the Performers or Scenes tab no longer triggers an unnecessary combined performer-and-scene search. No GraphQL schema, backend API, or database changes are required.