fix(oauth): register Anthropic Claude.ai redirect_uri for browser MCP flow

Add https://claude.ai/api/mcp/auth_callback to the pre-registered OAuth
client redirect_uris so the new /oauth/connect-claude-ai route works.
ensureOAuthAppRegistered uses ON DUPLICATE KEY UPDATE so the DB row is
updated on the next server startup.

src/index.ts

@@ -2361,6 +2361,7 @@ async function main() {
   if (oauthClientId && oauthClientSecret) {
     await ensureOAuthAppRegistered(oauthClientId, oauthClientSecret, [
       `${SERVER_URL}/oauth/mcp-callback`,
+      'https://claude.ai/api/mcp/auth_callback',
       'http://localhost:*',
       'claude-desktop://callback',
       'opencode://callback',