Shorten thread route from /thread to /t

All internal links (tiles, prev/next nav, comments, notifications,
breadcrumb, dropzone route check) point to /t/<id>. A global route
middleware permanently redirects old /thread/<id> URLs including
query string and comment anchor.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/components/CommentsSidebar.vue

@@ -47,7 +47,7 @@ const mergedComments = computed(() => {
       <NuxtLink
         v-for="comment in mergedComments"
         :key="comment.id"
-        :to="`/thread/${comment.uploadId}#comment-${comment.id}`"
+        :to="`/t/${comment.uploadId}#comment-${comment.id}`"
         class="block rounded-md border border-sidebar-border/60 bg-sidebar px-3 py-2.5 text-sm transition-colors hover:border-sidebar-border hover:bg-sidebar-accent"
       >
         <div class="flex items-center gap-2 text-xs text-muted-foreground">

app/components/GlobalDropZone.vue

@@ -11,7 +11,7 @@ const uploading = ref(false)
 
 // In Threads gilt die Zone nur für die obere Bildschirmhälfte —
 // die untere Hälfte gehört den Kommentaren (dort Anhänge, sonst nichts)
-const topHalfOnly = computed(() => route.path.startsWith('/thread/'))
+const topHalfOnly = computed(() => route.path.startsWith('/t/'))
 const pointerY = ref(0)
 const inTopHalf = computed(() => !topHalfOnly.value || pointerY.value < (import.meta.client ? window.innerHeight : 0) / 2)
 

app/components/NotificationBell.vue

@@ -14,7 +14,7 @@ const timeAgo = useTimeAgo()
 async function goTo(n: AppNotification) {
   open.value = false
   await markRead(n.id)
-  await navigateTo(`/thread/${n.uploadId}#comment-${n.commentId}`)
+  await navigateTo(`/t/${n.uploadId}#comment-${n.commentId}`)
 }
 </script>
 

app/components/SiteBreadcrumb.vue

@@ -20,7 +20,7 @@ const crumbs = computed<Crumb[]>(() => {
   const list: Crumb[] = [{ label: t('palette.home'), to: '/' }]
   const p = route.path
   if (p === '/') return []
-  if (p.startsWith('/thread/')) list.push({ label: t('nav.thread') })
+  if (p.startsWith('/t/')) list.push({ label: t('nav.thread') })
   else if (p === '/users') list.push({ label: t('nav.users') })
   else if (p.startsWith('/user/')) {
     list.push({ label: t('nav.users'), to: '/users' }, { label: t('nav.profile') })

app/components/UploadTile.vue

@@ -120,14 +120,14 @@ async function openUpload(e: MouseEvent) {
 
   // Die eigentliche Navigation macht der NuxtLink bereits beim Klick —
   // dieser Push ist nur noch Fallback und bei gleicher Route ein No-Op
-  await router.push(`/thread/${props.upload.id}`)
+  await router.push(`/t/${props.upload.id}`)
   navigating.value = false
 }
 </script>
 
 <template>
   <NuxtLink
-    :to="`/thread/${upload.id}`"
+    :to="`/t/${upload.id}`"
     class="upload-tile group block"
     :class="[spanClass, navigating ? 'opacity-80' : '']"
     @click.capture="captureClick"