fix: replace nonexistent allowlist CLI command with config set

openclaw models allowlist add does not exist. Use openclaw config set
to add models to agents.defaults.models, matching the existing config
CLI convention used by other doctor hints.

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

src/commands/doctor-synthetic-allowlist.ts

@@ -65,7 +65,8 @@ export async function noteSyntheticAllowlistGaps(cfg: OpenClawConfig): Promise<v
     lines.push(`  - ${modelKey(entry.provider, entry.id)}`);
   }
   lines.push(
-    `To add: ${formatCliCommand("openclaw models allowlist add <model-id>")}`,
+    `To add: ${formatCliCommand("openclaw config set agents.defaults.models.<provider>/<model> '{}'")}`,
+    `Or edit the config file directly: ${formatCliCommand("openclaw config file")}`,
     "(Models are functional but hidden from agents until allowlisted)",
   );
   note(lines.join("\n"), "Synthetic model allowlist");