feat: RoutePanel/StationOverlay 개선

- 시점/종점: 드론 첫/마지막 프레임 기준 역명 표시 (회덕, 대전조차장 등)
- (상)/(하) 접미어 제거 (cleanTitle)
- 패널 높이 90%, 글씨 크기 +30%, 투명도 밝게
- 교량/터널 POI 겹침 방지 (7% 간격)

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

client/src/components/overlay/StationOverlay.tsx

@@ -65,6 +65,8 @@ interface RenderCache {
   poiCount: number;
 }
 
+const cleanTitle = (t: string) => t.replace(/\s*\([상하]\)\s*$/, '').trim();
+
 function stationOrder(title: string): number {
   const m = title.match(/(\d+)[Kk](\d+)/);
   if (!m) return 0;
@@ -470,10 +472,10 @@ export default function StationOverlay({ currentFrame, currentTime, fps, visible
           const lx = Math.max(2, x + 8);
           ctx.strokeStyle = 'rgba(0,0,0,0.85)'; ctx.lineWidth = 4;
           ctx.lineJoin = 'round';
-          ctx.strokeText(stA.title, lx, y);
+          ctx.strokeText(cleanTitle(stA.title), lx, y);
           // 텍스트 본문
           ctx.fillStyle = 'rgba(255,200,200,1.0)';
-          ctx.fillText(stA.title, lx, y);
+          ctx.fillText(cleanTitle(stA.title), lx, y);
         });
 
         // POI 마커 — 보간 후 EMA 적용
@@ -495,7 +497,7 @@ export default function StationOverlay({ currentFrame, currentTime, fps, visible
           ctx.stroke();
           // 이모지 + 텍스트
           const emoji = CATEGORY_EMOJI[poiA.category] ?? '📌';
-          const label = `${emoji} ${poiA.title}`;
+          const label = `${emoji} ${cleanTitle(poiA.title)}`;
           const lx = Math.max(2, px + 14);
           ctx.strokeStyle = 'rgba(0,0,0,0.85)'; ctx.lineWidth = 4;
           ctx.lineJoin = 'round';