fix(web): replace "as any" with safer cast in DemandPopover

The useQuery type cast was using `as any` behind a blanket eslint-disable.
Using an explicit function-shape cast is both safer and removes the lint
error.

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

apps/web/src/components/timeline/DemandPopover.tsx

@@ -46,9 +46,10 @@ export function DemandPopover({
   const totalHours = demand.hoursPerDay * days;
   const budgetCents = demand.dailyCostCents * days;
 
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const { data: suggestionData, isLoading: loadingSuggestions } = (
-    trpc.staffing.getProjectStaffingSuggestions.useQuery as any
+    trpc.staffing.getProjectStaffingSuggestions.useQuery as unknown as (
+      ...args: unknown[]
+    ) => unknown
   )(
     {
       projectId: demand.projectId,