fix: small fixes

internal/server/hub.go

@@ -37,7 +37,7 @@ type taskEntry struct {
 }
 
 // Session is one live byte stream between the panel and an agent (a PTY terminal
-// or a raw TCP forward — the hub treats both identically).
+// or a raw TCP forward - the hub treats both identically).
 type Session struct {
 	ID      string
 	AgentID string