feat(web): glow-pulse on primary CTAs + hero fills full first viewport

Two coordinated polish moves:

1. **<PulseLink> / <PulseButton>** — new `apps/web/components/pulse.tsx`.
   Click anywhere on a wrapped link or button and a small indigo dot
   detonates from the click point, scaling 1x→80x over 650ms before
   fading to transparent. Same visual language as the hero load-in
   glow — the click effectively says "this is the brand reaching back."

   The dot lives in a `pointer-events: none` overlay, so it never
   blocks the underlying navigation. `overflow-hidden + relative` are
   added to the host so the bloom stays inside the rounded shape.
   `glow-pulse` keyframe sits in globals.css next to the existing
   `pulse-dot` / `shimmer` / `fade-in` definitions; reduced-motion
   suppresses the animation to instant-opacity-0 so the click flow
   is preserved without the bloom.

   Wired into the highest-conversion CTAs only — the user explicitly
   asked "wo's Sinn macht":
   - Hero "Start building free" + "Read the docs"
   - Marketing header Login / Dashboard button
   - Dashboard header "+ New server" pill

   Deliberately NOT applied to dashboard nav links, logout, destructive
   buttons, form internals, carousel dots — pulse on every click would
   be noise.

2. **Hero fills 100svh − nav** (`min-height: calc(100svh - 3rem)`).
   `svh` (small viewport height) instead of `vh` so the hero doesn't
   jump when the mobile address bar hides/shows. The 3rem subtracts
   the sticky marketing nav (h-12 = 48px), so the hero ends right at
   the loadscreen's natural bottom edge.

   `flex items-center` plus the inner grid's existing `md:items-center`
   keep the content vertically centred inside the tall section. The
   ParticleHero background now has cinematic-scale room and the indigo
   radial-glow + dot-mask read as the dominant background motif —
   which is the effect the user loved at load-in.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/app/(dashboard)/layout.tsx

@@ -1,6 +1,7 @@
 import { CookieBanner } from '@/components/cookie-banner';
 import { Logo } from '@/components/logo';
 import { MobileActionBar } from '@/components/mobile-action-bar';
+import { PulseLink } from '@/components/pulse';
 import { UserMenu } from '@/components/user-menu';
 import { FileClock, LayoutGrid, Package, Server, Settings } from 'lucide-react';
 import Link from 'next/link';
@@ -33,12 +34,12 @@ export default function DashboardLayout({ children }: { children: React.ReactNod
             </nav>
           </div>
           <div className="flex items-center gap-1 sm:gap-2">
-            <Link
+            <PulseLink
               href="/servers/new"
               className="hidden h-7 items-center gap-1.5 rounded-md bg-[--color-accent] px-2.5 text-[12px] font-medium text-white transition-colors duration-200 hover:bg-[#5557e8] sm:inline-flex"
             >
               + New server
-            </Link>
+            </PulseLink>
             <UserMenu />
           </div>
         </div>