feat(admin): flag a heap limit below 700 MB with the setting to raise

The support report and the system status now say in one sentence when the
heap is the 1 GB-container size and point at APP_MEMORY_LIMIT.

Refs #1239

src/components/admin/_shared.tsx

@@ -61,6 +61,8 @@ export interface SystemStatus {
   buildTime: string;
   startTime: string;
   database: string;
+  /** The process's heap ceiling; `low` when it is below what a long-used account needs. */
+  memory: { heapLimitMb: number; low: boolean };
   worker: WorkerStatus;
   /**
    * Queues whose jobs exhausted their retries recently. `null` means the

src/components/admin/system-status-section.tsx

@@ -13,6 +13,7 @@ import {
   Key,
   Loader2,
   Map,
+  MemoryStick,
   Server,
   Users,
 } from "lucide-react";
@@ -156,6 +157,16 @@ export function SystemStatusSection() {
               }
               tone={status.database === "connected" ? "success" : "destructive"}
             />
+            <StatusItem
+              icon={MemoryStick}
+              label={t("admin.heapLimitLabel")}
+              value={
+                status.memory.low
+                  ? t("admin.heapLimitLow", { mb: status.memory.heapLimitMb })
+                  : t("admin.heapLimitValue", { mb: status.memory.heapLimitMb })
+              }
+              tone={status.memory.low ? "warning" : undefined}
+            />
             <StatusItem
               icon={Clock}
               label={t("admin.startedAt")}