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/style.css

@@ -1,6 +1,10 @@
 @import "tailwindcss";
+@import "./styles/corrosion.css";
 
-/* Corrosion Brand — Oxide Orange #F26622 */
+/* Tailwind utility colors — Oxide ramp (existing views use bg-oxide-*).
+   The full design-token system (neutral ramp, surfaces, per-game accents,
+   typography, spacing, elevation, motion) lives in ./styles/ and is the
+   source of truth for the redesign. */
 @theme {
   --color-oxide-50: #FEF3EB;
   --color-oxide-100: #FDE3D0;
@@ -15,7 +19,8 @@
   --color-oxide-950: #3D1506;
 }
 
-/* Dark mode is default — Rust servers run at night */
+/* Legacy brand vars — retained during the redesign port so any view still
+   referencing them keeps working; superseded by the ./styles tokens. */
 :root {
   --corrosion-accent: #F26622;
   --corrosion-dark: #000000;
@@ -24,12 +29,8 @@
   --corrosion-border: #2a2a2a;
 }
 
-body {
-  @apply bg-neutral-950 text-neutral-100 antialiased;
-  margin: 0;
-  min-height: 100vh;
-}
-
+/* Body background / text / font now come from the design system
+   (./styles/tokens/base.css → var(--surface-canvas), var(--text-primary)). */
 #app {
   min-height: 100vh;
 }