refactor and fix all references to emojis

src/components/blog/Attachments.svelte

@@ -6,14 +6,16 @@
    * when it's revealed, and the reveal is per-attachment because a single post
    * can mix flagged and unflagged media.
    */
-  import type { MediaAttachment } from '$lib/api/types'
+  import type { CustomEmoji, MediaAttachment } from '$lib/api/types'
+  import EmojiText from '../common/EmojiText.svelte'
 
   interface Props {
     attachments: MediaAttachment[]
+    emojis?: CustomEmoji[]
     sensitive?: boolean
   }
 
-  let { attachments, sensitive = false }: Props = $props()
+  let { attachments, emojis, sensitive = false }: Props = $props()
 
   let revealed = $state<Record<string, boolean>>({})
 
@@ -81,7 +83,9 @@
           {/if}
 
           {#if media.description}
-            <figcaption class="attachment-caption">{media.description}</figcaption>
+            <figcaption class="attachment-caption">
+              <EmojiText text={media.description} {emojis} />
+            </figcaption>
           {/if}
         </figure>