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-ui-service/src/main/kotlin/space/nstart/pcp/slots_service/controller/TguPlanningController.kt

@@ -8,7 +8,9 @@ import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RequestParam
 import org.springframework.web.bind.annotation.RestController
 import space.nstart.pcp.slots_service.dto.tgu.TguPlanDecision
+import space.nstart.pcp.slots_service.service.BallisticsService
 import space.nstart.pcp.slots_service.service.TguPlanningService
+import java.time.LocalDateTime
 import java.util.UUID
 
 @Controller
@@ -21,7 +23,8 @@ class TguPlanningPageController {
 @RestController
 @RequestMapping("/api/tgu-planning")
 class TguPlanningRestController(
-    private val tguPlanningService: TguPlanningService
+    private val tguPlanningService: TguPlanningService,
+    private val ballisticsService: BallisticsService
 ) {
 
     @GetMapping("/platforms")
@@ -43,4 +46,11 @@ class TguPlanningRestController(
         @RequestParam decision: TguPlanDecision,
         @RequestParam(required = false) reason: String?
     ) = tguPlanningService.sendDecision(planId, decision, reason)
+
+    @GetMapping("/spacecraft/{noradId}/flight-line")
+    fun spacecraftFlightLine(
+        @PathVariable noradId: Long,
+        @RequestParam("time_start", required = false) timeStart: LocalDateTime?,
+        @RequestParam("time_stop", required = false) timeStop: LocalDateTime?
+    ) = ballisticsService.flightLine(noradId, timeStart, timeStop).collectList().block() ?: emptyList<Any>()
 }