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/components/sidebar/PlayerList.tsx

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+import React from 'react';
+import { PlayerRow } from './PlayerRow';
+import type { TelemetrySnapshot, VitalsMessage } from '../../types';
+
+interface Props {
+  players: TelemetrySnapshot[];
+  vitals: Map<string, VitalsMessage>;
+  getColor: (name: string) => string;
+  onSelect: (name: string) => void;
+}
+
+export const PlayerList: React.FC<Props> = ({ players, vitals, getColor, onSelect }) => (
+  <ul className="ml-player-list">
+    {players.map(p => (
+      <PlayerRow
+        key={p.character_name}
+        player={p}
+        vitals={vitals.get(p.character_name) ?? null}
+        color={getColor(p.character_name)}
+        onSelect={() => onSelect(p.character_name)}
+      />
+    ))}
+  </ul>
+);

frontend/src/components/sidebar/PlayerRow.tsx

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+import React from 'react';
+import { formatCoord } from '../../utils/coordinates';
+import type { TelemetrySnapshot, VitalsMessage } from '../../types';
+
+interface Props {
+  player: TelemetrySnapshot;
+  vitals: VitalsMessage | null;
+  color: string;
+  onSelect: () => void;
+}
+
+export const PlayerRow: React.FC<Props> = React.memo(({ player: p, vitals: v, color, onSelect }) => {
+  const vtState = (p.vt_state || 'idle').toLowerCase();
+  const isActive = vtState === 'combat' || vtState === 'hunt';
+
+  return (
+    <li className="ml-player-row" style={{ borderLeftColor: color }} onClick={onSelect}>
+      {/* Row 1: Name + coords */}
+      <div className="ml-pr-name">{p.character_name}</div>
+      <div className="ml-pr-coords">{formatCoord(p.ns, p.ew)}</div>
+
+      {/* Row 2: Vital bars */}
+      <div className="ml-pr-vitals">
+        <div className="ml-vital-bar hp">
+          <div className="ml-vital-fill" style={{ width: `${v?.health_percentage ?? 0}%` }} />
+        </div>
+        <div className="ml-vital-bar sta">
+          <div className="ml-vital-fill" style={{ width: `${v?.stamina_percentage ?? 0}%` }} />
+        </div>
+        <div className="ml-vital-bar mana">
+          <div className="ml-vital-fill" style={{ width: `${v?.mana_percentage ?? 0}%` }} />
+        </div>
+      </div>
+
+      {/* Row 3: Stats */}
+      <div className="ml-pr-stats">
+        <span className="ml-stat" title="Session kills">{p.kills?.toLocaleString() ?? 0}</span>
+        <span className="ml-stat" title="Total kills">{(p.total_kills ?? 0).toLocaleString()}</span>
+        <span className="ml-stat" title="Kills per hour">{p.kills_per_hour ?? '0'} kph</span>
+      </div>
+
+      {/* Row 4: Rares + meta */}
+      <div className="ml-pr-stats">
+        <span className="ml-stat" title="Session rares">{p.session_rares ?? 0}r</span>
+        <span className="ml-stat" title="Total rares">{p.total_rares ?? 0}r</span>
+        <span className={`ml-meta-pill ${isActive ? 'active' : ''}`}>{p.vt_state || 'idle'}</span>
+      </div>
+
+      {/* Row 5: Time + deaths + tapers */}
+      <div className="ml-pr-stats">
+        <span className="ml-stat" title="Online time">{p.onlinetime?.replace(/^00\./, '') ?? '--'}</span>
+        <span className="ml-stat" title="Deaths">{p.deaths ?? '0'}d</span>
+        <span className="ml-stat" title="Prismatic tapers">{p.prismatic_taper_count ?? '0'}t</span>
+      </div>
+    </li>
+  );
+});
+
+PlayerRow.displayName = 'PlayerRow';

frontend/src/components/sidebar/SortButtons.tsx

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+import React from 'react';
+
+export type SortKey = 'name' | 'kph' | 'skills' | 'srares' | 'tkills' | 'kpr';
+
+const SORTS: { key: SortKey; label: string }[] = [
+  { key: 'name', label: 'Name' },
+  { key: 'kph', label: 'KPH' },
+  { key: 'skills', label: 'S.Kills' },
+  { key: 'srares', label: 'S.Rares' },
+  { key: 'tkills', label: 'T.Kills' },
+  { key: 'kpr', label: 'KPR' },
+];
+
+interface Props {
+  value: SortKey;
+  onChange: (key: SortKey) => void;
+}
+
+export const SortButtons: React.FC<Props> = ({ value, onChange }) => (
+  <div className="ml-sort-buttons">
+    {SORTS.map(s => (
+      <button
+        key={s.key}
+        className={`ml-sort-btn ${value === s.key ? 'active' : ''}`}
+        onClick={() => onChange(s.key)}
+      >
+        {s.label}
+      </button>
+    ))}
+  </div>
+);