feat(workflow-bar): optimistic F1 at start; all-green when session finalized

frontend/src/shell/AppShell.tsx

@@ -53,6 +53,8 @@ export function AppShell() {
   const ungroupedActive = activeList.filter((s) => !s.group);
   const archivedList = sessions.filter((s) => s.archived);
   const refresh = () => queryClient.invalidateQueries({ queryKey: ["sessions"] });
+  const activeSession = sessions.find((s) => s.id === activeSessionId) ?? null;
+  const finalized = activeSession?.status === "finalized";
 
   function openPanel(id: string) {
     const s = sessions.find((x) => x.id === id);
@@ -169,7 +171,7 @@ export function AppShell() {
         {activeSessionId && (
           <div className="shrink-0 border-b border-border/70 bg-background/80 px-6 py-2.5 backdrop-blur">
             <div className="mx-auto max-w-3xl">
-              <WorkflowBar />
+              <WorkflowBar finalized={finalized} />
             </div>
           </div>
         )}