feat(redesign): design-system tokens, 23 Vue components, game-aware shell + Fleet/Solo dashboard

Tokens ported 1:1 from the Claude Design bundle (colors/game-themes/type/spacing/elevation/motion/fonts) with the data-theme/data-game theming contract via useThemeGame (+ cc-skin-swap repaint guard). 23 design-system components reimplemented as Vue SFCs (core/forms/data/navigation/feedback/brand). DashboardLayout rebuilt as the game-aware shell (GameSwitcher, grouped nav with permission gating preserved, agent-health footer, topbar). DashboardView: Fleet + Solo with per-game GAME_FIELDS rows and the themed ECharts PlayersChart; Solo wired to the real server store, Fleet on representative data pending the multi-instance backend. All four game skins (Rust/Dune/Conan/Soulmask). vue-tsc + vite build green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/styles/tokens/fonts.css

@@ -0,0 +1,21 @@
+/* ============================================================
+   Corrosion Control — Fonts
+   Geist     — UI / body / app headings
+   JetBrains Mono — console, data, IDs, telemetry
+   Oxanium   — brand wordmark + marketing display (game-ops flavor)
+   ------------------------------------------------------------
+   NOTE: Loaded from Google Fonts CDN. If you want these self-
+   hosted (offline), send the woff2 files and these @imports
+   become @font-face rules.
+   ============================================================ */
+
+@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600;700;800&family=JetBrains+Mono:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Oxanium:wght@500;600;700;800&display=swap');
+
+:root {
+  --font-sans: 'Geist', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
+  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', 'Cascadia Code', Menlo, monospace;
+  /* Brand wordmark + big marketing display — squared, technical, gamey */
+  --font-brand: 'Oxanium', 'Geist', system-ui, sans-serif;
+  /* App-level display headings stay on the neutral sans */
+  --font-display: var(--font-sans);
+}