fix(dashboards): Resolve prebuilt dashboard placeholder IDs before duplication

[gggritso]

Prebuilt dashboards reference other prebuilt dashboards via linkedDashboards with placeholder dashboardId: '-1'. During duplication from list/grid views, these placeholders were sent directly to the backend, causing failures.

Extracts shared pure utilities (getLinkedDashboardPrebuiltIds, replacePlaceholderLinkedDashboardIds) from the existing usePopulateLinkedDashboards hook and adds an async resolver (resolveLinkedDashboardIds) that fetches real IDs via TanStack queryClient.fetchQuery before cloning. Unresolved linked dashboards are dropped to avoid sending invalid -1 IDs.

The resolver shares a makeDashboardsQueryKey helper with the existing hook to keep query key construction consistent.

This creates a bit of duplication with the code that resolves prebuilt IDs for displaying the pre-built dashboard, but that whole layer will need a re-look anyway. I filed a separate ticket for that: https://linear.app/getsentry/issue/DAIN-1341/consolidate-dashboards-data-fetching-code

DAIN-1300

[linear-code]

DAIN-1300 Resolve prebuilt `linkedDashboards` placeholder IDs before duplication

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: Loading state starts after resolver request
  • Moved setIsLoading(true) to the start of the duplication try-block so loading is active during linked-dashboard ID resolution and the button stays disabled throughout the async flow.

Or push these changes by commenting:

@cursor push 6f48b888bd

Preview (6f48b888bd)

diff --git a/static/app/views/dashboards/hooks/useDuplicateDashboard.tsx b/static/app/views/dashboards/hooks/useDuplicateDashboard.tsx
--- a/static/app/views/dashboards/hooks/useDuplicateDashboard.tsx
+++ b/static/app/views/dashboards/hooks/useDuplicateDashboard.tsx
@@ -74,6 +74,7 @@
         );
       }
       try {
+        setIsLoading(true);
         const dashboardDetail = await resolveLinkedDashboardIds({
           queryClient,
           orgSlug: organization.slug,
@@ -83,7 +84,6 @@
         delete newDashboard.prebuiltId;
         newDashboard.title = `${newDashboard.title} copy`;
         newDashboard.widgets.map(widget => (widget.id = undefined));
-        setIsLoading(true);
         const copiedDashboard = await createDashboard(
           api,
           organization.slug,

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