feat(voice): add reusable geometry actions

- turn named places and mapped landmarks into reusable bounded areas
- count loaded records inside resolved, drawn and annotated geometry
- find recent imagery for an area, the view or the pointer snapshot
- keep osm place search behind an operator-configured overpass endpoint
- preserve cancellation, ownership and follow-up memory across every action
- cover geometry, provider lifecycle, cache isolation and voice routing

src/voice/layerManifest.js

@@ -348,6 +348,23 @@ const layers = [
     context: false,
     noQuery: 'cable records are not loaded for queries',
   },
+  {
+    // Results of the last osm_query ("hospitals in Kathmandu").
+    id: 'osm-places',
+    aliases: ['osm places', 'map search results', 'search results'],
+    context: false,
+    query: {
+      fields: {
+        name: ['t'],
+        kind: ['t'],
+        operator: ['t'],
+        emergency: ['t'],
+        wheelchair: ['t'],
+        openingHours: ['t'],
+        city: ['t'],
+      },
+    },
+  },
   {
     // Global Context owns this layer; voice reaches it through
     // set_context_mode, never a bare toggle.