Redesign UI with new token system, primitives, and motion

Restraint-first design language: neutral gray surfaces + one blue accent
(cyan/amber/red reserved for state), 8pt spacing, softer radii, one
ambient + one raised shadow, standardized motion tokens. Alfa Slab One
demoted to BrandMark only; Inter carries all page copy.

New primitives (Button, Card, Badge, Stat, SectionHeader, Skeleton,
EmptyState, Tabs, Breadcrumbs, StatusPip, Field, Input, Select, Textarea)
plus motion utilities (tweenNumber, viewTransition) and a global toast
system. All eight route surfaces rewritten on top: Fleet gains an
overview hero, Server detail restructures into tabs, Deployments gets a
collapsible drift summary + per-server pipeline visual, and the
scripts/configs/plugins/betas flows adopt the new form primitives.

Sticky translucent nav with backdrop blur, view-transition cross-fades
between routes, staggered card entrance on Fleet, breathing status pip
halo, tabular-numeric player counts. Gmail-style g-key nav shortcuts.
Mobile stacks below 720px; prefers-reduced-motion neutralizes durations.
Legacy tokens preserved as aliases so any un-migrated code still renders.

src/lib/ui/motion/viewTransition.ts

@@ -0,0 +1,27 @@
+// SvelteKit `onNavigate` helper — wraps client-side navigation in the
+// browser's View Transitions API so route changes cross-fade cleanly and
+// shared-element transitions (Fleet card → Server detail hero) morph.
+//
+// Chromium ships the API today; Firefox and Safari fall through to a plain
+// navigation — same behavior as before, just without the transition.
+
+// Structural type — accepts whatever SvelteKit passes to onNavigate without
+// coupling to a specific @sveltejs/kit version's type name.
+type NavigationLike = { complete: Promise<unknown> };
+
+export function enableViewTransitions(navigation: NavigationLike): Promise<void> | void {
+    // Feature-detect without a custom Document extension — the DOM lib type
+    // varies between TS versions, and any narrowing has to survive both.
+    const start = (document as unknown as {
+        startViewTransition?: (cb: () => void | Promise<void>) => unknown;
+    }).startViewTransition;
+
+    if (typeof start !== 'function') return;
+
+    return new Promise<void>((resolve) => {
+        start.call(document, async () => {
+            resolve();
+            await navigation.complete;
+        });
+    });
+}