fix(template): EmptyState takes children, not message

Core's EmptyState renders its children and nothing else. The template's
clan list passed the sentence as message=, which React drops without a
word, so the panel rendered as an empty box - and module-rust, built
from this template, shipped six of those across four phases before a
browser walk noticed (docs modules/rust/PLAN.md §23.4).

Same class of bug as the PageHeader subtitle the Teams work found here.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

template/client/src/routes/public/Clans.jsx

@@ -23,8 +23,12 @@ export default function Clans() {
       {loading && <Loading />}
       {error && <ErrorState error={error} />}
 
+      {/* `EmptyState` renders its CHILDREN and takes no other prop. Pass the
+          sentence as `message=` and React drops it without a word: the panel
+          renders as an empty box. module-rust shipped six of those for four
+          phases, learned from this line when it said `message=`. */}
       {data && data.clans.length === 0 && (
-        <EmptyState message="No clans have been reported yet." />
+        <EmptyState>No clans have been reported yet.</EmptyState>
       )}
 
       {data && data.clans.length > 0 && (