fix: SAC version from /health in sidebar and dashboard (0.9.4)

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/composables/useSacVersion.ts

@@ -0,0 +1,57 @@
+import { onMounted, ref } from "vue";
+import { APP_NAME, APP_VERSION } from "../version";
+
+export interface SacVersionInfo {
+  name: string;
+  version: string;
+}
+
+let cached: SacVersionInfo | null = null;
+let inflight: Promise<SacVersionInfo> | null = null;
+
+async function fetchSacVersion(): Promise<SacVersionInfo> {
+  if (cached) {
+    return cached;
+  }
+  if (inflight) {
+    return inflight;
+  }
+
+  inflight = (async () => {
+    const fallback: SacVersionInfo = { name: APP_NAME, version: APP_VERSION };
+    try {
+      const response = await fetch("/health");
+      if (!response.ok) {
+        return fallback;
+      }
+      const data = (await response.json()) as { name?: string; version?: string };
+      const info: SacVersionInfo = {
+        name: (data.name || APP_NAME).trim() || APP_NAME,
+        version: (data.version || APP_VERSION).trim() || APP_VERSION,
+      };
+      cached = info;
+      return info;
+    } catch {
+      return fallback;
+    } finally {
+      inflight = null;
+    }
+  })();
+
+  return inflight;
+}
+
+/** Версия SAC с бэкенда (/health); fallback — frontend/src/version.ts */
+export function useSacVersion() {
+  const appName = ref(APP_NAME);
+  const appVersion = ref(APP_VERSION);
+
+  onMounted(() => {
+    void fetchSacVersion().then((info) => {
+      appName.value = info.name;
+      appVersion.value = info.version;
+    });
+  });
+
+  return { appName, appVersion };
+}