fix(webapp): increase min width for run slug in filter dropdown

Increase the minimum width for the run slug display inside the
RunFilters select dropdown so long slugs are less likely to be
truncated prematurely. Change MiddleTruncate to include a
min-w-[360px] class on the SelectItem content to provide more room
for slugs and improve readability in the runs filter UI.

Author: 0ski

apps/webapp/app/components/runs/v3/RunFilters.tsx

@@ -655,7 +655,7 @@ function TasksDropdown({
                 <TaskTriggerSourceIcon source={item.triggerSource} className="size-4 flex-none" />
               }
             >
-              <MiddleTruncate text={item.slug} />
+              <MiddleTruncate text={item.slug} className="min-w-[360px]"/>
             </SelectItem>
           ))}
         </SelectList>