refactor(runtime): replace unicode dashes in prompt strings

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/agents/dynamic-agent-category-skills-guide.ts

@@ -55,7 +55,7 @@ export function buildCategorySkillsDelegationGuide(
 
   const categoryRows = categories.map((category) => {
     const description = category.description || category.name
-    return `- \`${category.name}\` — ${description}`
+    return `- \`${category.name}\` - ${description}`
   })
 
   const customSkills = skills.filter((skill) => skill.location !== "plugin")