feat: rebrand Metapi to BoosAPI, add ComfyUI agent and user management

- Rename project from Metapi to BoosAPI across all UI and server strings
- Add ComfyUI conversational agent page (/comfyui-agent)
- Add user management system (register, login, API keys, admin)
- Update Dockerfile and database schema
- Add ComfyUI workflow nodes support
- Update shared contracts and platform configurations

Signed-off-by: Boos4721 <boos4721@icloud.com>

src/web/pages/ComfyUI.tsx

@@ -0,0 +1,37 @@
+import React from 'react';
+
+export default function ComfyUI() {
+  const [isDark, setIsDark] = React.useState(true);
+
+  React.useEffect(() => {
+    const el = document.documentElement;
+    const check = () => setIsDark(el.getAttribute('data-theme') !== 'light');
+    check();
+    const mo = new MutationObserver(check);
+    mo.observe(el, { attributes: true, attributeFilter: ['data-theme'] });
+    return () => mo.disconnect();
+  }, []);
+
+  return (
+    <div
+      style={{
+        width: '100%',
+        height: 'calc(100vh - 56px)',
+        display: 'flex',
+        flexDirection: 'column',
+        background: isDark ? '#1a1a2e' : '#f5f5f5',
+      }}
+    >
+      <iframe
+        src="/comfyui"
+        style={{
+          width: '100%',
+          height: '100%',
+          border: 'none',
+        }}
+        title="ComfyUI"
+        allow="clipboard-read; clipboard-write"
+      />
+    </div>
+  );
+}