GhiVideo 소스 복제 — v4 작업 시작 기준

기존 GhiVideo 저장소 HEAD의 트래킹 소스 362개 파일을 복제.
(node_modules·storage·빌드 산출물·대용량 미디어는 .gitignore 규칙대로 제외)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/src/stationbar/mocks/mileage.ts

@@ -0,0 +1,15 @@
+import type { MileageMarkerSpec } from '../types/timeline';
+
+/** Mileage figures along the top edge of the timeline bar. */
+export const MILEAGE_MARKERS: MileageMarkerSpec[] = [
+  { id: 'm-158k400', value: '158k400', left: 349.5, mileage: 158400 },
+  { id: 'm-158k000', value: '158k000', left: 412.5, mileage: 158000 },
+  { id: 'm-163k500', value: '163k500', left: 995, mileage: 163500 },
+  { id: 'm-161k800', value: '161k800', left: 1186, mileage: 161800 },
+  { id: 'm-163k100', value: '163k100', left: 1332, mileage: 163100 },
+  { id: 'm-162k300', value: '162k300', left: 1420.5, mileage: 162300 },
+  { id: 'm-163k400', value: '163k400', left: 1544, mileage: 163400 },
+  { id: 'm-162k100-a', value: '162k100', left: 1688.5, mileage: 162100 },
+  { id: 'm-162k600', value: '162k600', left: 1744, mileage: 162600 },
+  { id: 'm-162k100-b', value: '162k100', left: 1803, mileage: 162100 },
+];