refactor: remove deprecated GitLab wrapper module and related code

lib/projects.ts

@@ -4,6 +4,7 @@
  */
 import fs from "node:fs/promises";
 import path from "node:path";
+import { homedir } from "node:os";
 import { TIER_MIGRATION } from "./tiers.js";
 
 export type WorkerState = {
@@ -229,3 +230,14 @@ export async function deactivateWorker(
     issueId: null,
   });
 }
+
+/**
+ * Resolve repo path from projects.json repo field (handles ~/ expansion).
+ * Uses os.homedir() for cross-platform home directory resolution.
+ */
+export function resolveRepoPath(repoField: string): string {
+  if (repoField.startsWith("~/")) {
+    return repoField.replace("~", homedir());
+  }
+  return repoField;
+}