explorer: Drop privacy and encryption claims

Connections between nodes are neither encrypted nor authenticated until
the network protocol vulnerability is fixed, see
https://radicle.dev/2026/09/23/disclosure-of-vulnerability-in-network-protocol

explorer/src/marketing/Landing.svelte

@@ -538,14 +538,6 @@
       </p>
     </article>
 
-    <article class="feature-card">
-      <h4 class="txt-bold-18">Private</h4>
-      <p class="txt-medium-16 txt-color-tertiary">
-        Direct peer-to-peer sync and Tor integration are standard. Share what
-        you want, with whom you want, without anyone watching.
-      </p>
-    </article>
-
     <article class="feature-card">
       <h4 class="txt-bold-18">Signed by default</h4>
       <p class="txt-medium-16 txt-color-tertiary">
@@ -577,8 +569,8 @@
     <article class="feature-card">
       <h4 class="txt-bold-18">Sovereign</h4>
       <p class="txt-medium-16 txt-color-tertiary">
-        Your code. Your identity. Your infrastructure. Nobody can deplatform
-        you, rate-limit you, or revoke your access.
+        Your code. Your identity. Your infrastructure. Replicated across peers,
+        so nobody can deplatform you, rate-limit you, or revoke your access.
       </p>
     </article>
   </section>

explorer/src/marketing/docs/glossary.md

@@ -41,9 +41,7 @@ title: Glossary
 
 **Node** — A participant in the Radicle network, running `radicle-node`. Identified by a public key (Node ID).
 
-**Node ID (NID)** — The public key that identifies a node on the network. Also used as the node’s static key in NoiseXK handshakes. Retrieve yours with `rad self --nid`.
-
-**NoiseXK** — The cryptographic handshake pattern used to secure peer connections. Uses Ed25519 keys and requires knowing the peer’s Node ID before connecting.
+**Node ID (NID)** — The public key that identifies a node on the network. Retrieve yours with `rad self --nid`.
 
 **Patch** — A proposed code change, stored as a COB. Radicle’s equivalent of a pull request.
 

explorer/src/marketing/guides.ts

@@ -45,15 +45,6 @@ export const guides: Guide[] = [
     external: true,
     video: false,
   },
-  {
-    title: "Private collaboration over Radicle Garden",
-    description:
-      "Collaborate on a private repository from behind NAT firewalls, using Garden as an always-on relay.",
-    href: "https://radicle.garden/blog/private-collaboration-powered-by-garden",
-    image: "/marketing/images/garden-bg.png",
-    external: true,
-    video: false,
-  },
   {
     title: "Custom domains on Radicle Garden",
     description: