fix: bug fixes and UX improvements (v0.3.5)

- Fix clipboard copy error in HTTP environment with execCommand fallback
- Fix team invite page not loading user groups, always showing "join group first"
- Fix JoinGroupPage isMember check using group object instead of user ID
- Fix cancelRSVP deleting all users' RSVP records instead of current user's
- Fix event detail not loading event data itself
- Fix event comment avatar URL missing PocketBase baseUrl prefix
- Fix event creation missing endTime > startTime validation
- Fix event manage/delete permission split (creator+owner vs creator+owner)
- Fix event create button only visible to admins, now all members can create
- Fix event expand not subscribing to comments/RSVP realtime updates
- Fix event relative time not using status field
- Remove duplicate create/join group buttons from header and welcome bar
- Refactor team invite link to use API function

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/components/event/EventList.vue

@@ -9,7 +9,7 @@ import type { Event } from '@/types'
 import { Plus } from '@element-plus/icons-vue'
 import CreateEventDialog from './CreateEventDialog.vue'
 import EventCard from './EventCard.vue'
-import { subscribeEvents } from '@/api/events'
+import { subscribeEvents, subscribeEventComments, subscribeEventRSVPs } from '@/api/events'
 
 const route = useRoute()
 const eventStore = useEventStore()
@@ -20,9 +20,11 @@ const showCreateDialog = ref(false)
 const editingEvent = ref<Event | null>(null)
 const expandedEventId = ref<string | null>(null)
 
-const canManage = computed(() => groupStore.canManageGroup)
+const isMember = computed(() => !!groupStore.currentGroup)
 
 let unsubscribeFn: (() => void) | null = null
+let unsubscribeCommentsFn: (() => void) | null = null
+let unsubscribeRSVPsFn: (() => void) | null = null
 
 onMounted(async () => {
   await eventStore.loadEvents(groupId)
@@ -35,19 +37,31 @@ onMounted(async () => {
 })
 
 onUnmounted(() => {
-  if (unsubscribeFn) {
-    unsubscribeFn()
-    unsubscribeFn = null
-  }
+  if (unsubscribeFn) unsubscribeFn()
+  if (unsubscribeCommentsFn) unsubscribeCommentsFn()
+  if (unsubscribeRSVPsFn) unsubscribeRSVPsFn()
+  unsubscribeFn = null
+  unsubscribeCommentsFn = null
+  unsubscribeRSVPsFn = null
   eventStore.clear()
 })
 
 async function toggleExpand(event: Event) {
   if (expandedEventId.value === event.id) {
     expandedEventId.value = null
+    if (unsubscribeCommentsFn) { unsubscribeCommentsFn(); unsubscribeCommentsFn = null }
+    if (unsubscribeRSVPsFn) { unsubscribeRSVPsFn(); unsubscribeRSVPsFn = null }
   } else {
     expandedEventId.value = event.id
     await eventStore.loadCommentsAndRSVPs(event.id)
+    if (unsubscribeCommentsFn) unsubscribeCommentsFn()
+    if (unsubscribeRSVPsFn) unsubscribeRSVPsFn()
+    unsubscribeCommentsFn = await subscribeEventComments(event.id, () => {
+      eventStore.loadCommentsAndRSVPs(event.id)
+    })
+    unsubscribeRSVPsFn = await subscribeEventRSVPs(event.id, () => {
+      eventStore.loadCommentsAndRSVPs(event.id)
+    })
   }
 }
 
@@ -99,7 +113,7 @@ function onDialogClosed() {
   <div class="event-list">
     <div class="list-header">
       <h2 class="list-title">群组活动</h2>
-      <button v-if="canManage" class="create-btn" @click="showCreateDialog = true">
+      <button v-if="isMember" class="create-btn" @click="showCreateDialog = true">
         <el-icon><Plus /></el-icon> 发起活动
       </button>
     </div>
@@ -111,7 +125,7 @@ function onDialogClosed() {
 
     <div v-else-if="eventStore.events.length === 0" class="empty-state">
       <p>暂无活动</p>
-      <p v-if="canManage" class="empty-hint">点击右上角发起一个活动吧</p>
+      <p v-if="isMember" class="empty-hint">点击右上角发起一个活动吧</p>
     </div>
 
     <div v-else class="event-sections">