feat(tickets): Kurz-Verweise (Shortlinks) im Ticket-Text auflösen

Die KI kann im Text `tier:<8hex>` / `kontakt:` / `wurf:` / `gehege:` schreiben;
Frontend löst per POST /refs/resolve (Präfix-Match, DB-agnostisch) zu Name +
internem Link auf. Reine KI-Schreibhilfe — kein Nutzer-Button.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

gerbil-manager-web/e2e/mock-api.ts

@@ -795,6 +795,34 @@ export async function installMockApi(page: Page): Promise<MockDb> {
       return json(route, 405)
     }
 
+    // REFS: getippte Kurz-Verweise (Shortlinks) auflösen. Spiegelt das Backend:
+    // Präfix-Match (>=6 Hex, bindestrich-tolerant) auf der bindestrich-losen Id;
+    // mehrdeutig/unbekannt => id/name null.
+    if (path === '/refs/resolve' && method === 'POST') {
+      const body = request.postDataJSON() as { refs?: { type?: string; code?: string }[] }
+      const tableFor: Record<string, Row[]> = {
+        tier: db.gerbils as unknown as Row[],
+        kontakt: db.contacts as unknown as Row[],
+        wurf: db.litters as unknown as Row[],
+        gehege: db.enclosures as unknown as Row[],
+      }
+      const normCode = (code: string) => (code ?? '').toLowerCase().replace(/[^0-9a-f]/g, '')
+      const results = (body.refs ?? []).map((r) => {
+        const type = (r.type ?? '').toLowerCase()
+        const prefix = normCode(r.code ?? '')
+        const rows = tableFor[type]
+        if (!rows || prefix.length < 6) return { type: r.type, code: r.code, id: null, name: null }
+        const matches = rows.filter((row) =>
+          String(row.id ?? '').toLowerCase().replace(/-/g, '').startsWith(prefix),
+        )
+        if (matches.length === 1) {
+          return { type: r.type, code: r.code, id: String(matches[0].id), name: String(matches[0].name ?? '') }
+        }
+        return { type: r.type, code: r.code, id: null, name: null }
+      })
+      return json(route, 200, results)
+    }
+
     // Generische Kollektionen: /<resource> und /<resource>/<id>
     m = path.match(/^\/([a-z-]+)(?:\/([^/]+))?$/)
     const col = m ? collections[m[1]] : undefined