feat: add GitHub setup step and enhance setup flow

- Introduced a new GitHubSetupStep component for GitHub CLI configuration during the setup process.
- Updated SetupView to include the GitHub step in the setup flow, allowing users to skip or proceed based on their GitHub CLI status.
- Enhanced state management to track GitHub CLI installation and authentication status.
- Added logging for transitions between setup steps to improve user feedback.
- Updated related files to ensure cross-platform path normalization and compatibility.

apps/server/src/routes/setup/index.ts

@@ -11,6 +11,7 @@ import { createDeleteApiKeyHandler } from "./routes/delete-api-key.js";
 import { createApiKeysHandler } from "./routes/api-keys.js";
 import { createPlatformHandler } from "./routes/platform.js";
 import { createVerifyClaudeAuthHandler } from "./routes/verify-claude-auth.js";
+import { createGhStatusHandler } from "./routes/gh-status.js";
 
 export function createSetupRoutes(): Router {
   const router = Router();
@@ -23,6 +24,7 @@ export function createSetupRoutes(): Router {
   router.get("/api-keys", createApiKeysHandler());
   router.get("/platform", createPlatformHandler());
   router.post("/verify-claude-auth", createVerifyClaudeAuthHandler());
+  router.get("/gh-status", createGhStatusHandler());
 
   return router;
 }