Updated Dashboard and clarified default states.

frontend/src/pages/Volunteers.svelte

@@ -20,6 +20,14 @@
 
   const role = $derived(session?.user?.role ?? '')
   const canManage = $derived(['admin', 'ticketing', 'staffing', 'colead'].includes(role))
+  const myDeptIDs = $derived(session?.user?.department_ids ?? [])
+
+  // Auto-filter coleads to their department on mount
+  $effect(() => {
+    if (role === 'colead' && myDeptIDs.length > 0 && !filterDept) {
+      filterDept = String(myDeptIDs[0])
+    }
+  })
 
   const allVolunteers = liveQuery(() =>
     db.volunteers.filter(v => !v.deleted_at).toArray()
@@ -177,7 +185,7 @@
   {#if ($allVolunteers ?? []).length === 0}
     <div class="empty">
       <strong>No volunteers yet</strong>
-      <p>Add volunteers manually.</p>
+      <p>Add volunteers manually above, or enable public signup in Settings.</p>
     </div>
   {:else}
     <div class="table-wrap">