fix(search): keep a missed location query in the field so it can be corrected (#1420)

A location search that found nothing or failed now keeps its query, the open field and focus (text selected), and shows a persistent role=alert message under the search row instead of a toast. Typing, a new search or closing the emptied field clears it. HAL-727.

src/ui/locationControls.js

@@ -22,6 +22,7 @@ export class LocationControls {
     onCity,
     onPoi,
     onSearch,
+    onSearchEdit,
     onReset,
     doc = document,
     requestFrame = (callback) => requestAnimationFrame(callback),
@@ -74,6 +75,11 @@ export class LocationControls {
     this.bind(elements.search, 'keydown', (event) => {
       if (event.key === 'Enter') void onSearch(elements.search.value);
     });
+    // Typing corrects a failed query; closing the field (which empties it) drops its error.
+    this.bind(elements.search, 'input', () => onSearchEdit?.());
+    this.bind(elements.search, 'blur', () => {
+      if (!elements.search.value) onSearchEdit?.();
+    });
     for (const button of elements.resetButtons)
       this.bind(button, 'click', onReset);
   }