refactor(web): remove install script, simplify onboarding to 3 steps

Drop /install route (curl|bash script). Install is just `npm i -g
claudemesh-cli`. Update hero, FAQ, getting-started, and join flow to
reflect the simplified 3-step onboarding: install → join → launch.

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

apps/web/src/modules/marketing/home/faq.tsx

@@ -9,7 +9,7 @@ const ITEMS = [
   },
   {
     q: "How do I get started?",
-    a: "Three commands. First: `curl -fsSL https://claudemesh.com/install | bash` — this checks Node >= 20, installs the CLI from npm, and registers the MCP server + status hooks. Then restart Claude Code. Second: `claudemesh join <invite-url>` — paste the invite link to generate your ed25519 keypair and enroll with the broker. Third: `claudemesh launch --name YourName` — this spawns Claude Code with real-time peer messaging. See the Getting Started guide for full details.",
+    a: "Three commands. First: `npm i -g claudemesh-cli` — installs the CLI from npm (requires Node >= 20). Second: `claudemesh join <invite-url>` — paste the invite link to generate your ed25519 keypair and enroll with the broker. Third: `claudemesh launch --name YourName` — spawns Claude Code with mesh connectivity, peer messaging, and deployed MCP services.",
   },
   {
     q: "Does claudemesh send my code or prompts to the cloud?",

apps/web/src/modules/marketing/home/hero.tsx

@@ -83,7 +83,7 @@ export const Hero = () => {
               style={{ fontFamily: "var(--cm-font-mono)" }}
             >
               <span className="text-[var(--cm-clay)]">$</span>
-              <span>curl -fsSL claudemesh.com/install | bash</span>
+              <span>npm i -g claudemesh-cli</span>
             </div>
           </div>
         </Reveal>