refactor: simplify global command path resolution (#567)

* refactor: simplify global command path resolution

* fix: correct global Claude directory path resolution

Author: xierenyuan

src/skill.ts

@@ -73,7 +73,6 @@ export class SkillManager {
 
     const globalClaudeDir = path.join(
       path.dirname(this.paths.globalConfigDir),
-      '..',
       '.claude',
       'skills',
     );

src/slashCommand.ts

@@ -50,7 +50,6 @@ export class SlashCommandManager {
     const globalClaude = this.#loadGlobal(
       path.join(
         path.dirname(opts.paths.globalConfigDir),
-        '..',
         '.claude',
         'commands',
       ),