feat(geo): real-time attendance map on OpenStreetMap tiles

New GeoAttendance scene plus Attendance Map chip on Landing. Uses
react-leaflet 4 + leaflet 1.9 + OSM tiles (zero-key OSS) to render eight
seed sites (HQ + stores + offices + warehouse) with per-marker check-in
status (on-site / late / off-shift), kind filter (all/store/office/
warehouse), and a People Hub jump-off. Auto-fits to the visible markers.

OSS stack: react-leaflet@4, leaflet@1.9.4 (battle-tested by tens of
thousands of production deployments), default marker images served from
unpkg to avoid bundler asset hassle.

src/App.tsx

@@ -11,6 +11,7 @@ import SsoCallback from "./scenes/SsoCallback";
 import Chat from "./scenes/Chat";
 import Agent from "./scenes/Agent";
 import Hub from "./scenes/Hub";
+import GeoAttendance from "./scenes/GeoAttendance";
 import CommandBar from "./components/CommandBar";
 import Toaster from "./components/Toaster";
 import Console from "./components/Console";
@@ -163,6 +164,7 @@ export default function App() {
         {scene === "hub-procurement" && <Hub hub="procurement" />}
         {scene === "hub-hr" && <Hub hub="hr" />}
         {scene === "hub-it" && <Hub hub="it" />}
+        {scene === "geo-attendance" && <GeoAttendance />}
         {scene === "settings" && <Settings />}
       </div>