Street Level: a posted view whose camera was taken stands down whole again

Applying the rest of a posted view after the camera was taken during its
terrain wait still let it change the camera: stop_tracking dropped a follow
the user had just started, and annotate_map framed the view's marks. A
camera taken during the wait now ends the view again, as before. The 2 s
terrain timeout and the per-view catch on the queue stay.

src/app/embed.js

@@ -500,7 +500,6 @@ export function installViews({
     queue = queue
       .then(async () => {
         if (signal?.aborted) return;
-        let apply = run;
         if (unplaced && view.street_level) {
           // A terrain service that does not answer soon leaves the view's
           // own estimate.
@@ -514,20 +513,21 @@ export function installViews({
             .catch(() => null)
             .finally(() => owner.stop());
           if (signal?.aborted) return;
-          // Whoever takes the camera meanwhile (a drag, a search, the
-          // assistant) keeps it: the photos stand down, as when the camera
-          // is taken during the action, and the rest of the view applies.
-          if (owner.taken())
-            apply = (name, ...rest) =>
-              name === 'show_street_level'
-                ? {
-                    ok: false,
-                    cancelled: true,
-                    superseded: true,
-                    error: 'The camera moved on before the photo opened',
-                  }
-                : run(name, ...rest);
-          else if (point)
+          // Whoever takes the camera while the terrain answers (a drag, a
+          // search, the assistant) keeps it: the view stands down.
+          if (owner.taken()) {
+            post(
+              {
+                type: EMBED_APPLIED_MESSAGE,
+                id,
+                ok: false,
+                steps: [{ step: 'street_level', ok: false, superseded: true }],
+              },
+              replyOrigin,
+            );
+            return;
+          }
+          if (point)
             view = createView({
               ...event.data.view,
               street_level: { ...asked, ...point },
@@ -536,7 +536,7 @@ export function installViews({
         const steps = await applyView(view, {
           viewer,
           dataManager,
-          run: apply,
+          run,
           signal,
           autoOpen,
         });