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/features/mcp-oauth/oauth-authorization-flow.ts

@@ -113,7 +113,7 @@ function openBrowser(url: string): void {
     child.on("error", () => {})
     child.unref()
   } catch {
-    // Browser open failed — user must navigate manually
+    // Browser open failed - user must navigate manually
   }
 }