feat(arcrun): mira wiki page with tag filter + accumulated WIP

- landing/app/mira/wiki: tag=mira-wiki list now shows all wiki paragraphs
  (depends on KBDB tag filter exposed in matrix/kbdb commit, separate repo)
- landing: app/mira hub + feed split + various WIP from prior sessions
- registry/components: claude_api / kbdb_create_block / kbdb_get / km_writer /
  platform_crypto / auth_oauth2 contracts + main.go (accumulated)
- .component-builds: pkg-lock updates + index.ts adjustments (WIP)
- .agents/specs/arcrun/frontend-redesign: design notes
- docs/test_credentials, docs/user_requirements/arcrun-landing-page: WIP docs
- cypher-executor: auth-dispatcher / wasi-shim adjustments (WIP)

Includes accumulated work from prior sessions plus the wiki UI tag-filter
update that surfaces the AI-generated wiki paragraphs at /mira/wiki.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

landing/app/integrations/page.tsx

@@ -1,6 +1,7 @@
 export const runtime = 'edge';
 
 import Link from 'next/link';
+import SiteNav from '../components/SiteNav';
 
 type Recipe = {
   id: string;
@@ -64,19 +65,7 @@ async function IntegrationsContent({
 
   return (
     <div className="min-h-screen bg-[#0a0a0a] text-[#ededed]">
-      {/* Nav */}
-      <nav className="flex items-center justify-between px-6 py-4 border-b border-[#1a1a1a]">
-        <Link href="/" className="text-white font-bold text-lg tracking-tight hover:opacity-80 transition-opacity">
-          arcrun
-        </Link>
-        <div className="flex items-center gap-4 text-sm">
-          <Link href="/api-docs" className="text-[#666] hover:text-white transition-colors">API</Link>
-          <Link href="/login"
-            className="bg-indigo-600 hover:bg-indigo-500 text-white px-4 py-1.5 rounded-md text-sm font-medium transition-colors">
-            Get API Key
-          </Link>
-        </div>
-      </nav>
+      <SiteNav currentPath="/integrations" />
 
       <div className="max-w-5xl mx-auto px-6 py-12">
         {/* Header */}