Add beenvoice mobile companion app with full dark mode support.

Expo app with dashboard, time clock, invoices, and settings — native tabs, glass UI, theme-aware components, and iOS Live Activities.

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

lib/use-running-elapsed.ts

@@ -0,0 +1,29 @@
+import { useEffect, useState } from "react";
+
+/** Live elapsed seconds since `startedAt`, ticking every second. */
+export function useRunningElapsed(startedAt?: string | Date | null) {
+  const [elapsed, setElapsed] = useState(0);
+
+  useEffect(() => {
+    if (!startedAt) {
+      setElapsed(0);
+      return;
+    }
+
+    const startMs = new Date(startedAt).getTime();
+    if (Number.isNaN(startMs)) {
+      setElapsed(0);
+      return;
+    }
+
+    const tick = () => {
+      setElapsed(Math.max(0, Math.floor((Date.now() - startMs) / 1000)));
+    };
+
+    tick();
+    const id = setInterval(tick, 1000);
+    return () => clearInterval(id);
+  }, [startedAt]);
+
+  return elapsed;
+}