feat: show note emoji icon in wikilinks, relationships, and backlinks

Display the note's frontmatter emoji before its title in the editor
wikilink renderer, relationship LinkButtons, and backlinks panel for
consistent emoji visibility across the app.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/inspector/shared.ts

@@ -3,6 +3,7 @@ import type { VaultEntry } from '../../types'
 import { getTypeColor, getTypeLightColor } from '../../utils/typeColors'
 import { getTypeIcon } from '../NoteItem'
 import { findEntryByTarget } from '../../utils/wikilinkColors'
+import { isEmoji } from '../../utils/emoji'
 
 export function isWikilink(value: string): boolean {
   return /^\[\[.*\]\]$/.test(value)
@@ -30,8 +31,10 @@ export function resolveRefProps(ref: string, entries: VaultEntry[], typeEntryMap
   const resolved = resolveRef(ref, entries)
   const refType = resolved?.isA ?? null
   const te = typeEntryMap[refType ?? '']
+  const icon = resolved?.icon
   return {
     label: wikilinkDisplay(ref),
+    emoji: icon && isEmoji(icon) ? icon : null,
     typeColor: getTypeColor(refType, te?.color),
     bgColor: getTypeLightColor(refType, te?.color),
     isArchived: resolved?.archived ?? false,