feat(mod_update): add self-update flow, package name parser, dynamic CLI version, and tests

ts/mod_update/classes.packagemanager.ts

@@ -191,12 +191,11 @@ export class PackageManagerUtil {
             const data = JSON.parse(line);
             if (data.type === 'tree' && data.data && data.data.trees) {
               for (const tree of data.data.trees) {
-                const name = tree.name?.split('@')[0] || '';
-                if (name.startsWith('@git.zone/')) {
-                  const version = tree.name?.split('@').pop() || 'unknown';
+                const parsed = PackageManagerUtil.parseYarnPackageName(tree.name || '');
+                if (parsed.name.startsWith('@git.zone/')) {
                   packages.push({
-                    name,
-                    version,
+                    name: parsed.name,
+                    version: parsed.version,
                     packageManager: pm,
                   });
                 }
@@ -277,6 +276,26 @@ export class PackageManagerUtil {
     }
   }
 
+  /**
+   * Parse a yarn package name string like "@git.zone/cli@1.0.0" into name and version.
+   * Handles scoped packages correctly by splitting on the last '@' (version separator).
+   */
+  public static parseYarnPackageName(fullName: string): { name: string; version: string } {
+    if (!fullName) {
+      return { name: '', version: 'unknown' };
+    }
+    const lastAtIndex = fullName.lastIndexOf('@');
+    // If lastAtIndex is 0, the string is just "@something" with no version
+    // If lastAtIndex is -1, there's no '@' at all
+    if (lastAtIndex <= 0) {
+      return { name: fullName, version: 'unknown' };
+    }
+    return {
+      name: fullName.substring(0, lastAtIndex),
+      version: fullName.substring(lastAtIndex + 1) || 'unknown',
+    };
+  }
+
   /**
    * Compare two semver versions
    * Returns true if latest > current