Presence: count an account as soon as it's linked; accept an empty outfit

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/api/src/app.ts

@@ -350,8 +350,10 @@ export function createApp({ db, auth, imvu, realtime: rt }: Deps) {
             target: String(found.id),
             detail: moved ? { imvu: found.username, movedFrom: prev!.userId } : { imvu: found.username },
           });
-          return { link, moved };
+          return { link, moved, previousOwner: prev?.userId };
         });
+        if (result.moved) realtime.unlinked(result.previousOwner!, found.id);
+        realtime.linked(me.id, found.id);
         return { link: linkView(result.link), moved: result.moved };
       },
       { signedIn: true, params: imvuIdParam },
@@ -403,6 +405,7 @@ export function createApp({ db, auth, imvu, realtime: rt }: Deps) {
       async ({ me, params, set }) => {
         const l = await ownLink(me, params.imvu);
         await db.delete(imvuLink).where(eq(imvuLink.imvuId, l.imvuId));
+        realtime.unlinked(me.id, l.imvuId);
         await audited(me.id, "link.remove", String(l.imvuId), { imvu: l.username });
         set.status = 204;
       },