fix: skip onboarding boot screen when already completed

The dependency-onboarding-booting CSS class (which hides all page
content) was applied unconditionally on Windows hosts before any
async check. Now it reads the completion flag from localStorage
first and skips the boot overlay if onboarding was already completed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: web3dev1337

client/app.js

@@ -9355,12 +9355,14 @@ class ClaudeOrchestrator {
 	      }
 	      body?.classList?.remove?.('dependency-onboarding-booting');
 	    };
-	    setBootstrapPending(true);
 	    if (!isWindowsHost) {
 	      setBootstrapPending(false);
 	      return;
 	    }
 
+	    const completedEarly = (() => { try { return localStorage.getItem(completedKey) === 'true'; } catch { return false; } })();
+	    setBootstrapPending(!completedEarly);
+
 	    const dismissKey = 'orchestrator-dependency-setup-dismissed-v3';
 	    const completedKey = 'orchestrator-dependency-onboarding-completed-v2';
 	    const progressKey = 'orchestrator-dependency-onboarding-progress-v2';