Uebergangs-Spaltenkopf: "geprueft" mit gruenem Haken sobald keine Entscheide offen sind

Wenn openCount == 0, zeigt der Kopf statt "n offen" nun gruen hinterlegt einen
Haken (CheckCircle2) + "geprueft".

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/components/PlanView.tsx

@@ -615,20 +615,23 @@ function PhaseHeader({ phase, onClick, active }: { phase: PhaseComputed; onClick
 }
 
 function TransitionHeader({ openCount, onClick }: { openCount: number; onClick: () => void }) {
+  const done = openCount === 0;
   return (
     <th
       onClick={onClick}
       className={`cursor-pointer border-b border-r border-border px-2 py-2 text-center align-top text-[11px] font-medium ${
-        openCount > 0 ? "bg-accent text-accent-fg" : "bg-accent-soft text-accent-soft-fg"
+        done ? "bg-success/10 text-success" : "bg-accent text-accent-fg"
       }`}
     >
       <div>Uebergang</div>
-      {openCount > 0 ? (
+      {done ? (
+        <div className="mt-1 flex items-center justify-center gap-1 text-[10px] font-semibold">
+          <CheckCircle2 className="h-3 w-3" /> geprueft
+        </div>
+      ) : (
         <div className="mt-1 rounded-full bg-accent-fg/20 px-1.5 py-0.5 text-[10px] font-semibold">
           {openCount} offen
         </div>
-      ) : (
-        <div className="mt-1 text-[10px] opacity-80">pruefen</div>
       )}
     </th>
   );