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/sisyphus/index.ts

@@ -1,5 +1,5 @@
 /**
- * Sisyphus agent — multi-model orchestrator.
+ * Sisyphus agent - multi-model orchestrator.
  *
  * This directory contains model-specific prompt variants:
  * - default.ts: Base implementation for Claude and general models