fix: resolve maxConcurrent display and binding bug (#1859)

src/app/(dashboard)/dashboard/providers/[id]/page.tsx

@@ -5151,6 +5151,15 @@ function ConnectionRow({
                 {t("autoPriority", { priority: connection.globalPriority })}
               </span>
             )}
+            {connection.maxConcurrent != null && connection.maxConcurrent > 0 && (
+              <span
+                className="inline-flex items-center gap-0.5 px-1.5 py-0.5 rounded text-xs font-medium bg-zinc-500/15 text-zinc-500 dark:bg-zinc-400/15 dark:text-zinc-400"
+                title={t("accountConcurrencyCapLabel")}
+              >
+                <span className="material-symbols-outlined text-[11px]">dynamic_feed</span>
+                {connection.maxConcurrent}
+              </span>
+            )}
             {/* Rate Limit Protection — inline toggle with label */}
             <span className="text-text-muted/30 select-none">|</span>
             <button

src/app/api/providers/[id]/route.ts

@@ -124,6 +124,8 @@ export async function PUT(request: Request, { params }: { params: Promise<{ id:
       rateLimitedUntil,
       lastTested,
       healthCheckInterval,
+      group,
+      maxConcurrent,
       providerSpecificData: incomingPsd,
     } = body;
 
@@ -148,6 +150,8 @@ export async function PUT(request: Request, { params }: { params: Promise<{ id:
     if (rateLimitedUntil !== undefined) updateData.rateLimitedUntil = rateLimitedUntil;
     if (lastTested !== undefined) updateData.lastTested = lastTested;
     if (healthCheckInterval !== undefined) updateData.healthCheckInterval = healthCheckInterval;
+    if (group !== undefined) updateData.group = group;
+    if (maxConcurrent !== undefined) updateData.maxConcurrent = maxConcurrent;
 
     // Merge providerSpecificData (partial update — preserve existing keys not sent by caller)
     if (incomingPsd !== undefined && incomingPsd !== null && typeof incomingPsd === "object") {