feat(tgu-ops-ui): display real ground track and swath from ballistics service

Replace synthetic orbit calculation (Kepler + spacecraft ID hash) with real
data from pcp-ballistics-service via a new proxy endpoint in pcp-ui-service.

Backend:
- TguPlanningController: add GET /api/tgu-planning/spacecraft/{noradId}/flight-line
  that proxies FlightLineDTO[] from BallisticsService for a given time interval

Frontend:
- Fetch FlightLineDTO[] (revolution, time, lat/long, swath boundaries) using
  the spacecraft's noradId for the current 24h map window
- Group points by real revolution number to build OrbitPassInfo[] with actual
  orbit numbers and UTC times instead of synthetic Kepler-based estimates
- Build ground track MapLines and swath MapPolygons from real coordinates;
  swath polygon = outer-left edge forward + outer-right edge reversed
- Enable swath layer in the editor map; draw with teal fill/stroke matching
  the track colour
- MapPassSelector now shows real revolution numbers in header and handle labels

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/pcp-tgu-ops-ui/src/api/tguApi.ts

@@ -6,6 +6,37 @@ import {
   type TguPlatform
 } from "../model/tguTypes";
 
+export type FlightLinePoint = {
+  time: string;
+  revolution: number;
+  lat: number;
+  long: number;
+  latLeft: number;
+  longLeft: number;
+  latInnerLeft: number;
+  longInnerLeft: number;
+  latInnerRight: number;
+  longInnerRight: number;
+  latRight: number;
+  longRight: number;
+  revSign: "ASC" | "DESC";
+};
+
+export async function fetchFlightLine(
+  noradId: string,
+  fromMs: number,
+  toMs: number
+): Promise<FlightLinePoint[]> {
+  const toLocalDT = (ms: number) => new Date(ms).toISOString().slice(0, 19);
+  const query = new URLSearchParams({
+    time_start: toLocalDT(fromMs),
+    time_stop: toLocalDT(toMs)
+  });
+  return fetchJson<FlightLinePoint[]>(
+    `/api/tgu-planning/spacecraft/${encodeURIComponent(noradId)}/flight-line?${query}`
+  );
+}
+
 export async function fetchPlatforms(): Promise<TguPlatform[]> {
   return fetchJson<TguPlatform[]>("/api/tgu-planning/platforms");
 }