assets: recuperar las tres imagenes de UX que faltaban

La pantalla de ajustes y el asistente de bienvenida piden ux-blocks.png,
ux-chats.png y ux-ainav.png para el selector de modo de interfaz. No se
copiaron al integrar 0.9.5, asi que el selector salia con tres imagenes rotas.

De paso se retira media-favorites.js con su JSON: es de una version anterior
de la rama y ya no lo requiere nadie, upstream lo resuelve con
content_favorites.js.

src/backend/media-favorites.js

@@ -1,126 +0,0 @@
-const fs = require("fs");
-const path = require("path");
-
-const FILE = path.join(__dirname, "../configs/media-favorites.json");
-
-const DEFAULT = {
-  audios: [],
-  bookmarks: [],
-  calendars: [],
-  chats: [],
-  documents: [],
-  images: [],
-  maps: [],
-  pads: [],
-  shops: [],
-  market: [],
-  shopProducts: [],
-  torrents: [],
-  videos: []
-};
-
-const safeArr = (v) => (Array.isArray(v) ? v : []);
-
-let queue = Promise.resolve();
-
-const withLock = (fn) => {
-  queue = queue.then(fn, fn);
-  return queue;
-};
-
-const normalize = (raw) => {
-  const out = {};
-  for (const k of Object.keys(DEFAULT)) {
-    const list = safeArr(raw?.[k]).map((x) => String(x || "").trim()).filter(Boolean);
-    out[k] = Array.from(new Set(list));
-  }
-  return out;
-};
-
-const ensureFile = async () => {
-  try {
-    await fs.promises.access(FILE);
-  } catch (e) {
-    const dir = path.dirname(FILE);
-    await fs.promises.mkdir(dir, { recursive: true });
-    await fs.promises.writeFile(FILE, JSON.stringify(DEFAULT, null, 2), "utf8");
-  }
-};
-
-const readAll = async () => {
-  await ensureFile();
-  try {
-    const txt = await fs.promises.readFile(FILE, "utf8");
-    return normalize(JSON.parse(txt || "{}"));
-  } catch (e) {
-    const fixed = normalize(DEFAULT);
-    await fs.promises.writeFile(FILE, JSON.stringify(fixed, null, 2), "utf8");
-    return fixed;
-  }
-};
-
-const writeAll = async (data) => {
-  const dir = path.dirname(FILE);
-  const tmp = path.join(dir, `.media-favorites.${process.pid}.${Date.now()}.tmp`);
-  const txt = JSON.stringify(normalize(data), null, 2);
-  await fs.promises.writeFile(tmp, txt, "utf8");
-  await fs.promises.rename(tmp, FILE);
-};
-
-const assertKind = (kind) => {
-  const k = String(kind || "").trim();
-  if (!Object.prototype.hasOwnProperty.call(DEFAULT, k)) throw new Error("Invalid favorites kind");
-  return k;
-};
-
-const lastArg = (args, n) => args[args.length - n];
-
-const kindFromArgs = (args) => {
-  const k = String(lastArg(args, 1) || "").trim();
-  return assertKind(k);
-};
-
-const idFromArgs = (args) => String(lastArg(args, 1) || "").trim();
-
-exports.getFavoriteSet = async (kind) => {
-  const k = assertKind(kind);
-  const data = await readAll();
-  return new Set(safeArr(data[k]).map(String));
-};
-
-exports.addFavorite = async (kind, id) =>
-  withLock(async () => {
-    const k = assertKind(kind);
-    const favId = String(id || "").trim();
-    if (!favId) return;
-    const data = await readAll();
-    const set = new Set(safeArr(data[k]).map(String));
-    set.add(favId);
-    data[k] = Array.from(set);
-    await writeAll(data);
-  });
-
-exports.removeFavorite = async (kind, id) =>
-  withLock(async () => {
-    const k = assertKind(kind);
-    const favId = String(id || "").trim();
-    if (!favId) return;
-    const data = await readAll();
-    const set = new Set(safeArr(data[k]).map(String));
-    set.delete(favId);
-    data[k] = Array.from(set);
-    await writeAll(data);
-  });
-
-exports.getFavoritesSet = async (...args) => exports.getFavoriteSet(kindFromArgs(args));
-exports.addToFavorites = async (...args) => {
-  const kind = kindFromArgs(args.slice(0, -1));
-  const id = idFromArgs(args);
-  return exports.addFavorite(kind, id);
-};
-exports.removeFromFavorites = async (...args) => {
-  const kind = kindFromArgs(args.slice(0, -1));
-  const id = idFromArgs(args);
-  return exports.removeFavorite(kind, id);
-};
-

src/configs/media-favorites.json

@@ -1,13 +0,0 @@
-{
-  "audios": [],
-  "bookmarks": [],
-  "calendars": [],
-  "chats": [],
-  "documents": [],
-  "images": [],
-  "maps": [],
-  "pads": [],
-  "shops": [],
-  "torrents": [],
-  "videos": []
-}