feat(v2): Phase 1 — map-first layout matching v1

Rebuilds the v1 map-centric experience in React:

Layout:
- 400px sidebar on left, interactive map on right (flex, 100vh)
- Exact same proportions and dark theme as v1

Sidebar (top→bottom):
- Header with active player count + Dashboard toggle button
- Server status dot (Coldeve online/offline with pulse)
- Aggregate counters: Rares (gold), Server KPH (blue glow), Kills (red)
- 6 sort buttons (Name, KPH, S.Kills, S.Rares, T.Kills, KPR)
- Player name filter
- Scrollable player list with per-row:
  - Name + coordinates
  - HP/Stamina/Mana vital bars (red/orange/blue gradients)
  - Session kills, total kills, KPH
  - Session rares, total rares, VTank meta state pill
  - Online time, deaths, prismatic tapers
  - Color-coded left border per player

Map:
- dereth.png with CSS transform pan (drag) + zoom (wheel, 1.1x factor, max 20x)
- Player dots (6px circles, color-matched to sidebar)
- Hover tooltip (name, coords, kph, kills)
- World coordinate display at cursor position
- Fit-to-window on first load

View toggle: Map View ↔ Dashboard with localStorage persistence.
All v1 CSS ported under ml-* prefix, scoped via map-layout.css.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/utils/coordinates.ts

@@ -0,0 +1,31 @@
+// Matches v1 script.js MAP_BOUNDS (UtilityBelt's coordinate system)
+export const MAP_BOUNDS = {
+  west: -102.1,
+  east: 102.1,
+  north: 102.1,
+  south: -102.1,
+};
+
+export function worldToPx(ew: number, ns: number, imgW: number, imgH: number) {
+  const x = ((ew - MAP_BOUNDS.west) / (MAP_BOUNDS.east - MAP_BOUNDS.west)) * imgW;
+  const y = ((MAP_BOUNDS.north - ns) / (MAP_BOUNDS.north - MAP_BOUNDS.south)) * imgH;
+  return { x, y };
+}
+
+export function pxToWorld(
+  screenX: number, screenY: number,
+  scale: number, offX: number, offY: number,
+  imgW: number, imgH: number,
+) {
+  const mapX = (screenX - offX) / scale;
+  const mapY = (screenY - offY) / scale;
+  const ew = MAP_BOUNDS.west + (mapX / imgW) * (MAP_BOUNDS.east - MAP_BOUNDS.west);
+  const ns = MAP_BOUNDS.north - (mapY / imgH) * (MAP_BOUNDS.north - MAP_BOUNDS.south);
+  return { ew, ns };
+}
+
+export function formatCoord(ns: number, ew: number): string {
+  const nsDir = ns >= 0 ? 'N' : 'S';
+  const ewDir = ew >= 0 ? 'E' : 'W';
+  return `${Math.abs(ns).toFixed(1)}${nsDir}, ${Math.abs(ew).toFixed(1)}${ewDir}`;
+}