fix(ui): refresh LOCAL SYSTEM after a jump instead of waiting for a page reload (#30)

WorldMapPanel owns the world state and applied the /api/jump response
locally, so MissionControl's lifted /api/system state (LOCAL SYSTEM tab,
CARGO HOLD, SECTOR row) stayed on the previous system until a full refresh.
The panel now takes an onJumped callback that MissionControl wires to an
/api/system refetch after every successful jump.

components/world-map.tsx

@@ -11,9 +11,10 @@ import type { WorldState } from '@/lib/game/save'
 
 interface WorldMapPanelProps {
   height?: number
+  onJumped?: () => void // #30 — let the parent refresh /api/system after a successful jump
 }
 
-export function WorldMapPanel({ height = 380 }: WorldMapPanelProps) {
+export function WorldMapPanel({ height = 380, onJumped }: WorldMapPanelProps) {
   const [world, setWorld] = useState<WorldState | null>(null)
   const [error, setError] = useState<string | null>(null)
   const [jumpingId, setJumpingId] = useState<number | null>(null)
@@ -47,12 +48,13 @@ export function WorldMapPanel({ height = 380 }: WorldMapPanelProps) {
       const body = (await res.json()) as WorldState & { error?: string }
       if (!res.ok) throw new Error(body.error ?? `HTTP ${res.status}`)
       setWorld(body) // fresh state straight from the response — no refetch needed
+      onJumped?.() // #30 — parent re-fetches /api/system (LOCAL SYSTEM + CARGO HOLD mirror it)
     } catch (err: unknown) {
       setError(err instanceof Error ? err.message : String(err))
     } finally {
       setJumpingId(null)
     }
-  }, [])
+  }, [onJumped])
 
   if (error && !world) {
     return (