refactor(lolschedule): post-subscribe review — docs and stale option

- handlers.js header now reflects fan-out to subscribers, not a single chat.
- README "Time zone" references the correct command names and gains a
  Subscribers section; Files section lists subscribers.js.
- formatEventLine's showLeague option is dead in production (renderToday
  and renderWeek always group under a league header), so drop it and the
  test that covered only the option toggle.

src/modules/lolschedule/README.md

@@ -66,13 +66,18 @@ Cache-first with KV. Key is `matches:{fromIso}:{toIso}`.
 - `/lolschedule_week`  — one section per ICT day; within each day, leagues are sub-grouped.
 - League ordering follows `LEAGUE_ORDER` in `format.js` (worlds / msi / first_stand first, then LCK / LPL / LEC / LCS, then the rest).
 
+## Subscribers
+
+`/lolschedule_subscribe` adds `ctx.chat.id` to the module's `subscribers` KV key (JSON array). `/lolschedule_unsubscribe` removes it. Both are idempotent and reply with the new state. The daily cron reads this list; empty list means the cron skips cleanly.
+
 ## Time zone
 
-All rendering is in **ICT (UTC+7)**. `startTime` is UTC ISO; day boundaries for the `/lol_today` and `/lol_week` windows are anchored to ICT midnight.
+All rendering is in **ICT (UTC+7)**. `startTime` is UTC ISO; day boundaries for the `/lolschedule_today` and `/lolschedule_week` windows are anchored to ICT midnight.
 
 ## Files
 
 - `index.js` — module contract
 - `api-client.js` — getSchedule client with pagination + cache
 - `format.js` — pure renderers (`formatEventLine`, `renderToday`, `renderWeek`)
-- `handlers.js` — grammY command handlers + ICT day-boundary helpers
+- `handlers.js` — grammY command handlers, ICT day boundaries, cron fan-out
+- `subscribers.js` — KV-backed add/list/remove for the daily-push list

src/modules/lolschedule/format.js

@@ -73,38 +73,34 @@ function teamLabel(team) {
 }
 
 /**
- * Render one event line (no leading newline). By default the league name is
- * omitted because events are rendered under a league header; pass
- * `{ showLeague: true }` to include it for flat lists.
+ * Render one event line (no leading newline). The league name is omitted
+ * because events render under a league header.
  *
  * @param {ScheduleEvent} event
- * @param {{ showLeague?: boolean }} [opts]
  * @returns {string} escaped HTML
  */
-export function formatEventLine(event, { showLeague = false } = {}) {
+export function formatEventLine(event) {
   const teams = event?.match?.teams || [];
   const t1Label = escapeHtml(teamLabel(teams[0]));
   const t2Label = escapeHtml(teamLabel(teams[1]));
   const block = event?.blockName ? ` (${escapeHtml(event.blockName)})` : "";
   const bestOf = event?.match?.strategy?.count;
   const bo = bestOf ? ` · Bo${bestOf}` : "";
-  const leagueSuffix =
-    showLeague && event?.league?.name ? ` · ${escapeHtml(event.league.name)}` : "";
 
   if (event?.state === "completed") {
     const w1 = teams[0]?.result?.gameWins ?? 0;
     const w2 = teams[1]?.result?.gameWins ?? 0;
     const l = teams[0]?.result?.outcome === "win" ? `<b>${t1Label}</b>` : t1Label;
     const r = teams[1]?.result?.outcome === "win" ? `<b>${t2Label}</b>` : t2Label;
-    return `✅ ${l} ${w1}–${w2} ${r}${bo}${leagueSuffix}${block}`;
+    return `✅ ${l} ${w1}–${w2} ${r}${bo}${block}`;
   }
   if (event?.state === "inProgress") {
     const w1 = teams[0]?.result?.gameWins ?? 0;
     const w2 = teams[1]?.result?.gameWins ?? 0;
-    return `🔴 LIVE ${t1Label} ${w1}–${w2} ${t2Label}${bo}${leagueSuffix}${block}`;
+    return `🔴 LIVE ${t1Label} ${w1}–${w2} ${t2Label}${bo}${block}`;
   }
   const time = formatIctTime(new Date(event.startTime));
-  return `🕒 ${time} ${t1Label} vs ${t2Label}${bo}${leagueSuffix}${block}`;
+  return `🕒 ${time} ${t1Label} vs ${t2Label}${bo}${block}`;
 }
 
 /**

src/modules/lolschedule/handlers.js

@@ -3,8 +3,8 @@
  *
  * Day boundaries are defined in ICT (UTC+7). Data comes from lolesports.com
  * via a cache-first fetcher; no cron pre-warm is needed because the upstream
- * API is rate-limit friendly. A daily cron also pushes today's schedule to a
- * configured chat.
+ * API is rate-limit friendly. A daily cron fans today's schedule out to every
+ * chat opted in via /lolschedule_subscribe.
  */
 
 import { getEventsCached } from "./api-client.js";

tests/modules/lolschedule/format.test.js

@@ -62,14 +62,10 @@ describe("formatIctTime / formatIctDayLabel", () => {
 });
 
 describe("formatEventLine", () => {
-  it("omits league name by default (renders under league header)", () => {
+  it("omits league name — renders under a league header", () => {
     expect(formatEventLine(evt())).not.toContain("LCK");
   });
 
-  it("includes league name when showLeague is true", () => {
-    expect(formatEventLine(evt(), { showLeague: true })).toContain("LCK");
-  });
-
   it("renders completed with bolded winner + score", () => {
     const line = formatEventLine(completed);
     expect(line.startsWith("✅")).toBe(true);