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/api-docs/page.tsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useRef } from 'react';
 import Link from 'next/link';
+import SiteNav from '../components/SiteNav';
 
 const API_BASE = process.env.NEXT_PUBLIC_API_BASE ?? 'https://cypher.arcrun.dev';
 
@@ -25,7 +26,7 @@ export default function ApiDocsPage() {
       const SwaggerUIBundle = (window as unknown as { SwaggerUIBundle: (opts: unknown) => void }).SwaggerUIBundle;
       if (!SwaggerUIBundle || !containerRef.current) return;
       SwaggerUIBundle({
-        url: `${API_BASE}/docs`,
+        url: `${API_BASE}/openapi.json`,
         dom_id: '#swagger-ui',
         presets: [(window as unknown as { SwaggerUIBundle: { presets: { apis: unknown } } }).SwaggerUIBundle.presets.apis],
         layout: 'BaseLayout',
@@ -51,20 +52,7 @@ export default function ApiDocsPage() {
 
   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="/integrations" className="text-[#666] hover:text-white transition-colors">Integrations</Link>
-          <Link href="/dashboard" className="text-[#666] hover:text-white transition-colors">Dashboard</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="/api-docs" />
 
       {/* Header */}
       <div className="max-w-5xl mx-auto px-6 py-8">