Revert map marker permanent label to city name (not IATA code)

Earlier §4.1.24.3 R24 fix (commit 0bb6bf2) set the permanent on-map
label to the IATA city code. That mis-read the TZ: §4.1.24.3 describes
the hover tooltip (всплывающая подсказка) as showing the airport
code, not the always-visible marker label. Angular reference + the
user-facing baseline render the permanent label as the localized
city name.

- FlightsMapStartPage: label = city.name (localized via dictionary).
- Updated two test assertions that had codified the previous IATA-
  based form.

Live retest: map now shows "Москва", "Санкт-Петербург", "Сочи", etc.
on its markers. 2044 tests pass, typecheck clean.

src/features/flights-map/components/FlightsMapStartPage.test.tsx

@@ -187,8 +187,10 @@ describe("FlightsMapStartPage — markers from dictionaries", () => {
     const mow = markers.find((m) => m["id"] === "MOW")!;
     expect(mow["countryType"]).toBe("ru");
     expect(mow["zoomLevel"]).toBe(2);
-    // TZ §4.1.24.3 R24: tooltip label is the IATA city code, not the city name
-    expect(mow["label"]).toBe("MOW");
+    // Permanent marker label is the localized city name. (The IATA code
+    // belongs to a separate hover tooltip per TZ §4.1.24.3 R24 — not to
+    // this always-visible label.)
+    expect(mow["label"]).toBe("Москва");
 
     const par = markers.find((m) => m["id"] === "PAR")!;
     expect(par["countryType"]).toBe("other");
@@ -790,10 +792,12 @@ describe("4.1.1-R14/R21: Flight-Map first-entry toggle defaults per TZ §4.1.1",
 });
 
 // ---------------------------------------------------------------------------
-// TZ §4.1.24.3 R24: marker labels are IATA codes (not city names)
+// Permanent marker label shows the localized city name. TZ §4.1.24.3 R24
+// prescribes the separate hover tooltip (not the always-visible label)
+// as showing the IATA code.
 // ---------------------------------------------------------------------------
 
-describe("§4.1.24.3 R24: map markers use IATA code as tooltip label", () => {
+describe("map markers use localized city name as permanent label", () => {
   beforeEach(() => {
     lastMapCanvasProps = null;
     dictState.loading = false;
@@ -804,7 +808,7 @@ describe("§4.1.24.3 R24: map markers use IATA code as tooltip label", () => {
     resetCrossSectionStore();
   });
 
-  it("4.1.24-R24: marker label equals city code (IATA), not city name", () => {
+  it("marker label equals the localized city name, not the IATA code", () => {
     dictState.dictionaries = buildDictionaries({
       regions: [],
       countries: [],
@@ -832,9 +836,8 @@ describe("§4.1.24.3 R24: map markers use IATA code as tooltip label", () => {
 
     const markers = lastMapCanvasProps!["markers"] as Array<Record<string, unknown>>;
     const mow = markers.find((m) => m["id"] === "MOW")!;
-    // TZ §4.1.24.3 R24: tooltip shows the IATA airport code, not the city name
-    expect(mow["label"]).toBe("MOW");
-    expect(mow["label"]).not.toBe("Москва");
+    expect(mow["label"]).toBe("Москва");
+    expect(mow["label"]).not.toBe("MOW");
   });
 });
 

src/features/flights-map/components/FlightsMapStartPage.tsx

@@ -243,10 +243,11 @@ export const FlightsMapStartPage: FC<FlightsMapStartPageProps> = ({
           id: city.code,
           lat: city.location.lat,
           lng: city.location.lon,
-          // TZ §4.1.24.3 R24: hover tooltip shows the IATA airport code, not
-          // the city name. The city code doubles as IATA here since our
-          // dictionaries use IATA city codes (MOW, LED, …).
-          label: city.code,
+          // Permanent on-map label shows the localized city name (dictionary
+          // is loaded per current locale). TZ §4.1.24.3 R24 describes the
+          // separate hover tooltip as showing the IATA code; that's not the
+          // same element as this always-visible marker label.
+          label: city.name,
           tooltipPermanent: true,
           style: isHighlighted ? "orange" : "blue-small",
           zoomLevel: getCityZoomLevel(city.code),