feat: open Jira in named window on start and speaker change

frontend/src/App.svelte

@@ -36,6 +36,7 @@
     EventsOn('timer:meeting_warning', handleMeetingWarning)
     EventsOn('timer:meeting_ended', handleMeetingEnded)
     EventsOn('timer:speaker_changed', handleSpeakerChanged)
+    EventsOn('jira:open', handleJiraOpen)
     
     // Warm up AudioContext on first user interaction
     const warmUpAudio = async () => {
@@ -96,6 +97,7 @@
     EventsOff('timer:meeting_warning')
     EventsOff('timer:meeting_ended')
     EventsOff('timer:speaker_changed')
+    EventsOff('jira:open')
   })
 
   function handleTimerEvent(state) {
@@ -132,6 +134,10 @@
     timerState = state
   }
 
+  function handleJiraOpen(url) {
+    window.open(url, 'jira-kanban')
+  }
+
   let audioContext = null
 
   function getAudioContext() {