fix(auth): use upstream protocol for OAuth deep links

Changed protocol back to twentyfirst-agents to match the 21st.dev backend.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: aadivar

src/main/auth-manager.ts

@@ -216,7 +216,7 @@ export class AuthManager {
     if (this.isDev) {
       authUrl += `&callback=${encodeURIComponent(`http://localhost:${AUTH_SERVER_PORT}/auth/callback`)}`
       // Pass dev protocol so production web can use correct deep link if callback fails
-      authUrl += `&protocol=aadivar-1code-dev`
+      authUrl += `&protocol=twentyfirst-agents-dev`
     }
 
     shell.openExternal(authUrl)

src/main/index.ts

@@ -40,7 +40,7 @@ import { IS_DEV, AUTH_SERVER_PORT } from "./constants"
 
 // Deep link protocol (must match package.json build.protocols.schemes)
 // Use different protocol in dev to avoid conflicts with production app
-const PROTOCOL = IS_DEV ? "aadivar-1code-dev" : "aadivar-1code"
+const PROTOCOL = IS_DEV ? "twentyfirst-agents-dev" : "twentyfirst-agents"
 
 // Set dev mode userData path BEFORE requestSingleInstanceLock()
 // This ensures dev and prod have separate instance locks