refactor(board): atomic delete + query limit + composable cleanup

Delete uses findOneAndDelete with author match (no TOCTOU window);
existence check only runs on miss to distinguish 403 vs 404. Posts
list capped at 200. Drop unused resolveTagChannel and refreshParams;
route slack URL building through the composable's slackUrl helper.

app/components/BoardPostCard.vue

@@ -86,6 +86,8 @@ const props = defineProps({
 
 defineEmits(['edit', 'delete', 'confirm-delete', 'cancel-delete'])
 
+const { slackUrl } = useBoardChannels()
+
 const capitalizeAvatar = (str) => {
   if (str.toLowerCase() === 'wtf') return 'WTF'
   return str
@@ -148,7 +150,7 @@ const slackLinks = computed(() => {
     .map((c) => ({
       id: c.slackChannelId,
       name: c.slackChannelName || c.name || c.slackChannelId,
-      url: `https://gammaspace.slack.com/archives/${c.slackChannelId}`,
+      url: slackUrl(c.slackChannelId),
     }))
 })
 </script>

app/composables/useBoardChannels.js

@@ -1,7 +1,3 @@
-/**
- * Board Channels Composable
- * Shared state + helpers for mapping board tags to Slack channels.
- */
 export function useBoardChannels() {
   const channels = useState('board.channels', () => [])
 
@@ -11,15 +7,6 @@ export function useBoardChannels() {
     return channels.value
   }
 
-  function resolveTagChannel(tagSlugs = []) {
-    if (!tagSlugs?.length) return null
-    return (
-      channels.value.find((channel) =>
-        (channel.tagSlugs || []).some((slug) => tagSlugs.includes(slug))
-      ) || null
-    )
-  }
-
   function slackUrl(channelId) {
     return `https://gammaspace.slack.com/archives/${channelId}`
   }
@@ -27,7 +14,6 @@ export function useBoardChannels() {
   return {
     channels: readonly(channels),
     fetchChannels,
-    resolveTagChannel,
     slackUrl,
   }
 }

app/composables/useBoardPosts.js

@@ -1,7 +1,3 @@
-/**
- * Board Posts Composable
- * Shared state + CRUD for board posts.
- */
 export function useBoardPosts() {
   const posts = useState('board.posts', () => [])
   const loading = useState('board.loading', () => false)
@@ -17,29 +13,29 @@ export function useBoardPosts() {
     }
   }
 
-  async function createPost(body, refreshParams = {}) {
+  async function createPost(body) {
     const created = await $fetch('/api/board/posts', {
       method: 'POST',
       body,
     })
-    await fetchPosts(refreshParams)
+    await fetchPosts()
     return created
   }
 
-  async function updatePost(id, body, refreshParams = {}) {
+  async function updatePost(id, body) {
     const updated = await $fetch(`/api/board/posts/${id}`, {
       method: 'PATCH',
       body,
     })
-    await fetchPosts(refreshParams)
+    await fetchPosts()
     return updated
   }
 
-  async function deletePost(id, refreshParams = {}) {
+  async function deletePost(id) {
     const result = await $fetch(`/api/board/posts/${id}`, {
       method: 'DELETE',
     })
-    await fetchPosts(refreshParams)
+    await fetchPosts()
     return result
   }
 

app/pages/board.vue

@@ -1,13 +1,11 @@
 <template>
   <PageShell title="Bulletin Board" :subtitle="pageSubtitle">
-    <!-- Action bar -->
     <div class="action-bar">
       <button type="button" class="new-post-btn" @click="openNewForm">
         + New Post
       </button>
     </div>
 
-    <!-- Tags Drawer Toggle -->
     <div v-if="cooperativeTags.length > 0" class="tags-drawer-toggle">
       <button type="button" class="drawer-btn" @click="showTagsDrawer = !showTagsDrawer">
         Tags...
@@ -15,7 +13,6 @@
       </button>
     </div>
 
-    <!-- Tags Drawer -->
     <div v-if="showTagsDrawer && cooperativeTags.length > 0" class="tags-drawer">
       <div class="skills-bar">
         <span class="tag-label">Filter:</span>
@@ -40,7 +37,6 @@
       </div>
     </div>
 
-    <!-- Inline form -->
     <div v-if="showForm" class="form-wrapper">
       <BoardPostForm
         :post="editingPost"
@@ -50,7 +46,6 @@
       />
     </div>
 
-    <!-- Content -->
     <ClientOnly>
       <div v-if="loading" class="loading-state">
         <p>Loading board...</p>