feat: improve Playwright configuration and enhance error handling in CreatePRDialog

- Updated Playwright configuration to always reuse existing servers, improving test efficiency.
- Enhanced CreatePRDialog to handle null browser URLs gracefully, ensuring better user experience during PR creation failures.
- Added new unit tests for app specification format and automaker paths, improving test coverage and reliability.
- Introduced tests for file system utilities and logger functionality, ensuring robust error handling and logging behavior.
- Implemented comprehensive tests for SDK options and dev server service, enhancing overall test stability and maintainability.

apps/server/tests/unit/lib/fs-utils.test.ts

@@ -0,0 +1,113 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { mkdirSafe, existsSafe } from "@/lib/fs-utils.js";
+import fs from "fs/promises";
+import path from "path";
+import os from "os";
+
+describe("fs-utils.ts", () => {
+  let testDir: string;
+
+  beforeEach(async () => {
+    // Create a temporary test directory
+    testDir = path.join(os.tmpdir(), `fs-utils-test-${Date.now()}`);
+    await fs.mkdir(testDir, { recursive: true });
+  });
+
+  afterEach(async () => {
+    // Clean up test directory
+    try {
+      await fs.rm(testDir, { recursive: true, force: true });
+    } catch {
+      // Ignore cleanup errors
+    }
+  });
+
+  describe("mkdirSafe", () => {
+    it("should create a new directory", async () => {
+      const newDir = path.join(testDir, "new-directory");
+      await mkdirSafe(newDir);
+
+      const stats = await fs.stat(newDir);
+      expect(stats.isDirectory()).toBe(true);
+    });
+
+    it("should succeed if directory already exists", async () => {
+      const existingDir = path.join(testDir, "existing");
+      await fs.mkdir(existingDir);
+
+      // Should not throw
+      await expect(mkdirSafe(existingDir)).resolves.toBeUndefined();
+    });
+
+    it("should create nested directories", async () => {
+      const nestedDir = path.join(testDir, "a", "b", "c");
+      await mkdirSafe(nestedDir);
+
+      const stats = await fs.stat(nestedDir);
+      expect(stats.isDirectory()).toBe(true);
+    });
+
+    it("should throw if path exists as a file", async () => {
+      const filePath = path.join(testDir, "file.txt");
+      await fs.writeFile(filePath, "content");
+
+      await expect(mkdirSafe(filePath)).rejects.toThrow(
+        "Path exists and is not a directory"
+      );
+    });
+
+    it("should succeed if path is a symlink to a directory", async () => {
+      const realDir = path.join(testDir, "real-dir");
+      const symlinkPath = path.join(testDir, "link-to-dir");
+      await fs.mkdir(realDir);
+      await fs.symlink(realDir, symlinkPath);
+
+      // Should not throw
+      await expect(mkdirSafe(symlinkPath)).resolves.toBeUndefined();
+    });
+  });
+
+  describe("existsSafe", () => {
+    it("should return true for existing file", async () => {
+      const filePath = path.join(testDir, "test-file.txt");
+      await fs.writeFile(filePath, "content");
+
+      const exists = await existsSafe(filePath);
+      expect(exists).toBe(true);
+    });
+
+    it("should return true for existing directory", async () => {
+      const dirPath = path.join(testDir, "test-dir");
+      await fs.mkdir(dirPath);
+
+      const exists = await existsSafe(dirPath);
+      expect(exists).toBe(true);
+    });
+
+    it("should return false for non-existent path", async () => {
+      const nonExistent = path.join(testDir, "does-not-exist");
+
+      const exists = await existsSafe(nonExistent);
+      expect(exists).toBe(false);
+    });
+
+    it("should return true for symlink", async () => {
+      const realFile = path.join(testDir, "real-file.txt");
+      const symlinkPath = path.join(testDir, "link-to-file");
+      await fs.writeFile(realFile, "content");
+      await fs.symlink(realFile, symlinkPath);
+
+      const exists = await existsSafe(symlinkPath);
+      expect(exists).toBe(true);
+    });
+
+    it("should return true for broken symlink (symlink exists even if target doesn't)", async () => {
+      const symlinkPath = path.join(testDir, "broken-link");
+      const nonExistent = path.join(testDir, "non-existent-target");
+      await fs.symlink(nonExistent, symlinkPath);
+
+      const exists = await existsSafe(symlinkPath);
+      expect(exists).toBe(true);
+    });
+  });
+});