refactoring the api endpoints to be separate files to reduce context usage

apps/server/src/routes/worktree/common.ts

@@ -0,0 +1,36 @@
+/**
+ * Common utilities for worktree routes
+ */
+
+import { createLogger } from "../../lib/logger.js";
+import { exec } from "child_process";
+import { promisify } from "util";
+
+const logger = createLogger("Worktree");
+const execAsync = promisify(exec);
+
+/**
+ * Check if a path is a git repo
+ */
+export async function isGitRepo(repoPath: string): Promise<boolean> {
+  try {
+    await execAsync("git rev-parse --is-inside-work-tree", { cwd: repoPath });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Get error message from error object
+ */
+export function getErrorMessage(error: unknown): string {
+  return error instanceof Error ? error.message : "Unknown error";
+}
+
+/**
+ * Log error details consistently
+ */
+export function logError(error: unknown, context: string): void {
+  logger.error(`❌ ${context}:`, error);
+}