fix(status): clarify runtime diagnostics labels

frontend/src/pages/status/StatusPage.tsx

@@ -120,6 +120,7 @@ function StatusContent({ status }: { status: StatusResponse }) {
   const release = status.release ?? {};
   const legacy = status.legacy ?? {};
   const legacyDocker = asRecord(legacy.docker);
+  const runtimeToolRecords = withRuntimeToolPurposes(asRecordArray(legacy.software));
   const releaseLabel = formatValue(release.releaseTag) || shortCommit(status.build?.sourceCommit) || "unknown";
   const releaseDetail = shortCommit(release.sourceCommit) || shortCommit(status.build?.sourceCommit) || formatValue(status.build?.sourceRefName);
   const compilerState = formatValue(status.umplesync?.alive) === "true" ? "Running" : "Not running";
@@ -180,28 +181,28 @@ function StatusContent({ status }: { status: StatusResponse }) {
 
       <StatusSection
         title="Diagnostics"
-        description="Counters and legacy status probes retained from the full status payload"
+        description="Counters and operational probes for runtime tools, compiler listener, containers, and execution settings"
         testId="status-diagnostics"
       >
         <div className="grid gap-4 xl:grid-cols-2">
           <SectionBlock title="Counters">
             <KeyValueTable data={status.counters} compact />
           </SectionBlock>
-          <SectionBlock title="Legacy visits">
+          <SectionBlock title="Visit counter">
             <KeyValueTable data={asRecord(legacy.visits)} compact />
           </SectionBlock>
-          <SectionBlock title="Legacy software">
-            <RecordsTable records={asRecordArray(legacy.software)} primary="name" />
+          <SectionBlock title="Runtime tools">
+            <RecordsTable records={runtimeToolRecords} primary="name" />
           </SectionBlock>
-          <SectionBlock title="Legacy listener">
+          <SectionBlock title="Compiler listener">
             <KeyValueTable data={asRecord(legacy.listener)} compact />
           </SectionBlock>
-          <SectionBlock title="Legacy Docker" className="xl:col-span-2">
+          <SectionBlock title="Container stats" className="xl:col-span-2">
             <KeyValueTable data={withoutKeys(legacyDocker, ["stats"])} compact />
             <Separator className="my-3" />
             <RecordsTable records={asRecordArray(legacyDocker.stats)} primary="name" />
           </SectionBlock>
-          <SectionBlock title="Legacy execution" className="xl:col-span-2">
+          <SectionBlock title="Code execution settings" className="xl:col-span-2">
             <KeyValueTable data={asRecord(legacy.execution)} compact />
           </SectionBlock>
         </div>
@@ -297,6 +298,31 @@ function buildHealthRecords(status: StatusResponse): HealthRecord[] {
   return [...services, ...checks, ...dependencies];
 }
 
+function withRuntimeToolPurposes(records: Array<Record<string, unknown>>): Array<Record<string, unknown>> {
+  return records.map((record) => ({
+    name: record.name,
+    purpose: runtimeToolPurpose(formatValue(record.name)),
+    ...withoutKeys(record, ["name"]),
+  }));
+}
+
+function runtimeToolPurpose(name: string): string {
+  switch (name) {
+    case "php":
+      return "Old UmpleOnline PHP runtime probe; not required by the new app";
+    case "java":
+      return "Runs umplesync.jar, the Umple compiler service";
+    case "dot":
+      return "Graphviz renderer for diagram layout output";
+    case "gcc":
+      return "Native C/C++ compiler used by generated-code workflows";
+    case "docker":
+      return "Container runtime used for services and isolated code execution";
+    default:
+      return "Runtime command reported by the status endpoint";
+  }
+}
+
 function HealthTable({ records }: { records: HealthRecord[] }) {
   if (records.length === 0) {
     return <p className="text-sm text-muted-foreground">No health records reported.</p>;

frontend/tests/e2e/status.spec.ts

@@ -69,7 +69,8 @@ test.describe('Status dashboard', () => {
     await expect(page.getByTestId('status-release-runtime')).toContainText('e3cdcad2cf7de3b9e510efc58856086406004718')
     await expect(page.getByTestId('status-release-runtime')).toContainText('http://code-exec:3000')
     await expect(page.getByTestId('status-umplesync')).toContainText('Umple compiler listener ready')
-    await expect(page.getByTestId('status-diagnostics')).toContainText('Legacy software')
+    await expect(page.getByTestId('status-diagnostics')).toContainText('Runtime tools')
+    await expect(page.getByTestId('status-diagnostics')).toContainText('Runs umplesync.jar')
     await expect(page.getByTestId('status-diagnostics')).toContainText('umpleonline-backend')
     await expect(page.locator('.react-resizable-handle')).toHaveCount(0)
     await expect(page.locator('.status-widget-drag-handle')).toHaveCount(0)