Sentence-case the "Try saying" suggestions label

Drops the uppercase micro-label treatment to match the consumer-soft
label style (13px sentence-case medium).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/index.tsx

@@ -408,7 +408,7 @@ export function AgentDock({
                   currentAgent?.starter_suggestions &&
                   currentAgent.starter_suggestions.length > 0 ? (
                     <div className="space-y-2">
-                      <p className="px-1 text-xs font-medium uppercase tracking-wide text-[var(--foreground)]/60">
+                      <p className="px-1 text-[0.8125rem] font-medium text-[var(--foreground)]/60">
                         Try saying
                       </p>
                       <ul className="space-y-1.5">