Redesign dashboard with steampunk neon theme and live gauges.

Ambient background, 3D neon cards, brass HUD styling, glowing charts, gauge rings, and refreshed Command Deck, Fleet Roster, Forge, and Calibrate pages.

server/web/src/components/Ambient/AmbientBackground.tsx

@@ -0,0 +1,16 @@
+import './AmbientBackground.css';
+
+export default function AmbientBackground() {
+  return (
+    <div className="ambient-bg" aria-hidden>
+      <div className="ambient-grid" />
+      <div className="ambient-vignette" />
+      <div className="ambient-orb ambient-orb-cyan" />
+      <div className="ambient-orb ambient-orb-magenta" />
+      <div className="ambient-orb ambient-orb-amber" />
+      <div className="ambient-scanline" />
+      <div className="ambient-gear ambient-gear-1" />
+      <div className="ambient-gear ambient-gear-2" />
+    </div>
+  );
+}