feat(website): apply Crystal Lattice brand — fonts, palette, hero copy

- Swap Inter/Cormorant Garamond/Geist → Neue Machina/Satoshi/Onest (all free/web)
- Align color palette to Crystal Lattice decision (0002): void #080C18, cyan-vivid #38BDF8, ice #DBE7F5
- Update hero: "Memory *is* identity." with italic blue "is", white "identity"
- New hero subtext: "Every conversation, every idea, every small decision… held somewhere safe."
- JetBrains Mono unchanged (already OFL)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/.vitepress/theme/landing/HeroSection.vue

@@ -5,13 +5,12 @@
     <div class="hero-inner">
       <div class="hero-copy">
         <h1 class="display">
-          <span class="line">Memory is</span>
-          <span class="line line-2">identity.</span>
+          <span class="line">Memory <em class="is-accent">is</em></span>
+          <span class="line line-2"><span class="identity-white">identity.</span></span>
         </h1>
         <p class="lede">
-          An AI that forgets cannot know you. MemPalace keeps every word you have
-          shared — verbatim, on your machine, permanent. Designed for total
-          recall.
+          Every conversation, every idea, every small decision&hellip; held somewhere safe.
+          <br><br>Welcome to the future of memory: <span class="mp-blue">MemPalace</span>
         </p>
         <form class="waitlist waitlist-hero" data-source="hero" novalidate>
           <div class="waitlist-head">