fix(setup): move OpenClaw detection into environment step

Avoids running `ls -d ~/.openclaw` as a separate Bash command which
triggers permission prompts for reading outside the project directory.
The environment step now reports OPENCLAW_PATH in its status block.

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

setup/environment.ts

@@ -66,6 +66,13 @@ export async function run(_args: string[]): Promise<void> {
     }
   }
 
+  // Check for existing OpenClaw installation
+  const homedir = (await import('os')).homedir();
+  const openClawPath =
+    fs.existsSync(path.join(homedir, '.openclaw')) ? path.join(homedir, '.openclaw') :
+    fs.existsSync(path.join(homedir, '.clawdbot')) ? path.join(homedir, '.clawdbot') :
+    null;
+
   log.info(
     'Environment check complete',
     {
@@ -76,6 +83,7 @@ export async function run(_args: string[]): Promise<void> {
       hasEnv,
       hasAuth,
       hasRegisteredGroups,
+      openClawPath,
     },
   );
 
@@ -88,6 +96,7 @@ export async function run(_args: string[]): Promise<void> {
     HAS_ENV: hasEnv,
     HAS_AUTH: hasAuth,
     HAS_REGISTERED_GROUPS: hasRegisteredGroups,
+    OPENCLAW_PATH: openClawPath ?? 'none',
     STATUS: 'success',
     LOG: 'logs/setup.log',
   });