feat: separate 'speaker controls'

specifically for 'i have finished speaking' and not allowing to change
the state

routes/room_page_templates_preview.go

@@ -57,6 +57,9 @@ func (r *roomTableData) Tangens() float64 {
 	}
 	return math.Tan(math.Pi / float64(r.Total())) // Math.tan(Math.PI/m);
 }
+func (r *roomTableData) IsViewerTheSpeaker() bool {
+	return r.currentPerson == r.CurrentSpeaker
+}
 
 type arrowData struct {
 	IsVisible        bool