feedback2 WE: setup downloads the 36 battle emotes and the 19 玩法说明 pages from the public mirror (ArknightsAssets2 cn); the client shows the local-client art first, then the mirror copy, then its fallback (#42)

shared/constants.js

@@ -152,7 +152,9 @@ export const ERR_TEXT = {
 // (tools/build-emotes.mjs); test/ui/emotes.test.js keeps this table identical to it.
 // Official emotes have no text (desc is null): `label` is ours and only ever an aria-label, never displayed.
 // Art: extracted from a local client (tools/local-extract) to /assets/local/emoticon/<dir>/<picId>.png and listed in
-// data/local-assets.json group `emoticon/<dir>`; the UI shows a neutral glyph when it is absent. The picId is not
+// data/local-assets.json group `emoticon/<dir>`; also downloaded from the public mirror by tools/fetch-assets.mjs
+// (tools/assets/plan.mjs UI_EXTRAS → data/assets.json ui['emoticon/<dir>/<picId>'], GitHub issue #42). The UI takes the
+// local picture first, then the mirror copy, and shows a neutral glyph when neither is there. The picId is not
 // derived from the id (autochess_battle_fooldoctor_03…06 → pic_fooldoctor_04/05/06/08_battle).
 const emo = (id, sortId, picId, label) => Object.freeze({ id, sortId, picId, label });
 export const EMOTE_THEMES = Object.freeze([