feat(stats): rotate tied teams in leader cards + new metric cards

Leader cards (Best attack/defense, Most clean sheets) now rotate through every
team tied on the headline metric instead of showing only the top one, and three
new cards are added: Most wins, Most goals conceded, Best goal difference.

- group by the metric value alone; order within the group by existing tiebreakers
- auto-advance (3.5s), pause on hover/focus, off under prefers-reduced-motion
- discrete edge arrows with a full-height side click strip; wrap-around
- dots indicator up to 8 tied teams, else an i/n counter; single team = plain card
- bump APP_VERSION to v1.0.2

assets/css/stats.css

@@ -220,6 +220,7 @@
   gap: 0.5rem;
   padding: 1.1rem 1rem;
   text-align: center;
+  position: relative; /* anchor for the full-height side click areas */
 }
 
 .leader-label {
@@ -248,6 +249,80 @@
   color: var(--accent-gold-soft);
 }
 
+/* tied-leader carousel: arrows pinned to the card edges (so they never shift
+   with the team-name width), dots/counter below */
+.leader-stage {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 100%;
+  /* keep the team clear of the full-height side click areas */
+  padding-inline: 2.75rem;
+}
+
+/* each arrow is a full-height strip down the card side: clicking anywhere on the
+   lateral navigates. The chevron glyph stays small, centered in the strip (≈ the
+   team row, since the card's vertical centre sits on it). */
+.leader-nav {
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  width: 2.75rem;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+  border: none;
+  background: transparent;
+  color: var(--text-secondary);
+  opacity: 0.5;
+  font-size: 1rem;
+  line-height: 1;
+  cursor: pointer;
+  transition: color 0.15s ease, opacity 0.15s ease;
+}
+
+.leader-prev { left: 0; }
+.leader-next { right: 0; }
+
+.leader-nav:hover,
+.leader-nav:focus-visible {
+  opacity: 1;
+  color: var(--accent-gold);
+}
+
+.leader-dots {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.25rem;
+  flex-wrap: wrap;
+  margin-top: -0.15rem; /* tuck the smaller dots closer to the value */
+}
+
+.leader-dot {
+  width: 4px;
+  height: 4px;
+  border-radius: 50%;
+  background: var(--glass-border);
+  transition: background 0.2s ease, transform 0.2s ease;
+}
+
+.leader-dot.active {
+  background: var(--accent-gold);
+  transform: scale(1.25);
+}
+
+.leader-counter {
+  font-size: 0.68rem;
+  color: var(--text-secondary);
+  font-variant-numeric: tabular-nums;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .leader-dot { transition: none; }
+}
+
 /* horizontal scroll on narrow screens; rank + team columns stay frozen */
 .stats-table-wrap {
   overflow-x: auto;

assets/js/i18n.js

@@ -6,7 +6,7 @@
 import { getPrefs, setPref } from './storage.js';
 
 // App version for footer display — bump this after any notable changes
-const APP_VERSION = 'v1.0.1';
+const APP_VERSION = 'v1.0.2';
 
 const dicts = {
   en: {
@@ -159,6 +159,11 @@ const dicts = {
     'stats.bestAttack': 'Best attack',
     'stats.bestDefense': 'Best defense',
     'stats.mostCleanSheets': 'Most clean sheets',
+    'stats.mostWins': 'Most wins',
+    'stats.mostConceded': 'Most goals conceded',
+    'stats.bestGoalDiff': 'Best goal difference',
+    'stats.leaderPrev': 'Previous team',
+    'stats.leaderNext': 'Next team',
     'stats.biggestWin': 'Biggest win',
     'stats.winStreak': 'Longest win streak',
     'stats.championPath': "Champion's path",
@@ -329,6 +334,11 @@ const dicts = {
     'stats.bestAttack': 'Melhor ataque',
     'stats.bestDefense': 'Melhor defesa',
     'stats.mostCleanSheets': 'Mais clean sheets',
+    'stats.mostWins': 'Mais vitórias',
+    'stats.mostConceded': 'Mais gols sofridos',
+    'stats.bestGoalDiff': 'Melhor saldo de gols',
+    'stats.leaderPrev': 'Time anterior',
+    'stats.leaderNext': 'Próximo time',
     'stats.biggestWin': 'Maior goleada',
     'stats.winStreak': 'Maior sequência de vitórias',
     'stats.championPath': 'Caminho do campeão',

assets/js/stats.js

@@ -362,16 +362,31 @@ function computeChampionPath(verdict) {
   return path.length ? path : null;
 }
 
-// Highlight leaders consider only teams that have played, so a 0-game team's
+// Leader cards in the Teams section. Each rotates through the teams TIED on its
-// empty record never counts as "best defense". Null before any match finishes.
+// headline metric — grouped by that metric's value ALONE (decision 2026-06-19),
+// so e.g. every team level on goals-for shares the "Best attack" card. `cmp`
+// orders within the group (leader first), so the team shown first is unchanged.
+const LEADER_CARDS = [
+  { id: 'bestAttack',      labelKey: 'stats.bestAttack',      metric: 'gf',          cmp: (a, b) => b.gf - a.gf || b.gd - a.gd },
+  { id: 'bestDefense',     labelKey: 'stats.bestDefense',     metric: 'ga',          cmp: (a, b) => a.ga - b.ga || b.cleanSheets - a.cleanSheets || b.gd - a.gd },
+  { id: 'mostCleanSheets', labelKey: 'stats.mostCleanSheets', metric: 'cleanSheets', cmp: (a, b) => b.cleanSheets - a.cleanSheets || a.ga - b.ga },
+  { id: 'mostWins',        labelKey: 'stats.mostWins',        metric: 'won',         cmp: (a, b) => b.won - a.won || b.gd - a.gd || b.gf - a.gf },
+  { id: 'mostConceded',    labelKey: 'stats.mostConceded',    metric: 'ga',          cmp: (a, b) => b.ga - a.ga || a.gd - b.gd },
+  { id: 'bestGoalDiff',    labelKey: 'stats.bestGoalDiff',    metric: 'gd',          cmp: (a, b) => b.gd - a.gd || b.gf - a.gf },
+];
+
+// Each card carries the FULL tied group (same value on its headline metric),
+// ordered by the card's tiebreakers; the carousel rotates through it. Only teams
+// that have played count (a 0-game team's empty record never "leads"). Null
+// before any match finishes → the whole leaders strip degrades away.
 function computeLeaders(teamStats) {
   const played = teamStats.filter((row) => row.played > 0);
   if (!played.length) return null;
-  return {
+  return LEADER_CARDS.map(({ id, labelKey, metric, cmp }) => {
-    bestAttack: [...played].sort((a, b) => b.gf - a.gf || b.gd - a.gd)[0],
+    const sorted = [...played].sort(cmp);
-    bestDefense: [...played].sort((a, b) => a.ga - b.ga || b.cleanSheets - a.cleanSheets || b.gd - a.gd)[0],
+    const best = sorted[0][metric];
-    mostCleanSheets: [...played].sort((a, b) => b.cleanSheets - a.cleanSheets || a.ga - b.ga)[0],
+    return { id, labelKey, metric, group: sorted.filter((row) => row[metric] === best) };
-  };
+  });
 }
 
 // ---------------------------------------------------------------- render
@@ -391,6 +406,7 @@ export function initStats() {
 
 function render() {
   if (!model) model = buildStatsModel();
+  clearLeaderTimers(); // drop any carousel intervals from the previous render
   const root = document.getElementById('stats-root');
   const sections = SECTIONS.filter((section) => section.available(model));
   root.innerHTML =
@@ -423,6 +439,7 @@ function render() {
     cmpBEl.addEventListener('change', () => { cmpB = cmpBEl.value; refreshComparator(); });
   }
   setupCountUps(root);
+  setupLeaderCarousels(root);
   setupSubNav(root, sections);
 }
 
@@ -900,30 +917,113 @@ function legendHTML(columns) {
   return `<p class="stats-legend">${pairs}</p>`;
 }
 
+const ROTATE_MS = 3500;   // auto-advance cadence for tied-leader carousels
+const DOTS_MAX = 8;       // above this many tied teams, dots give way to "i / n"
+
 function leadersHTML() {
   const leaders = model.leaders;
   if (!leaders) return '';
-  const cards = [
+  return `<div class="stats-leaders">${leaders.map(leaderCardHTML).join('')}</div>`;
-    { label: t('stats.bestAttack'), row: leaders.bestAttack, value: leaders.bestAttack.gf },
-    { label: t('stats.bestDefense'), row: leaders.bestDefense, value: leaders.bestDefense.ga },
-    { label: t('stats.mostCleanSheets'), row: leaders.mostCleanSheets, value: leaders.mostCleanSheets.cleanSheets },
-  ];
-  return `<div class="stats-leaders">${cards.map(leaderCardHTML).join('')}</div>`;
 }
 
-function leaderCardHTML({ label, row, value }) {
+function leaderValueText(metric, value) {
+  return metric === 'gd' && value > 0 ? `+${value}` : `${value}`;
+}
+
+function leaderTeamHTML(row) {
   const team = getData().teamById.get(row.teamId);
+  return `${flagImg(team, 30, 20)}<span class="leader-name">${team.name}</span>`;
+}
+
+// A leader card. Single-team group → a plain static card (identical to before).
+// A tie → arrows + an indicator (dots up to DOTS_MAX, else an "i / n" counter);
+// setupLeaderCarousels() wires the rotation. The big value is shared by the whole
+// group (all tied on the metric), so only the flag+name swap as it rotates.
+function leaderCardHTML({ id, labelKey, metric, group }) {
+  const label = t(labelKey);
+  const value = leaderValueText(metric, group[0][metric]);
+  if (group.length < 2) {
+    return `
+      <div class="leader-card glass">
+        <span class="leader-label">${label}</span>
+        <div class="leader-team">${leaderTeamHTML(group[0])}</div>
+        <span class="leader-value">${value}</span>
+      </div>`;
+  }
+  const indicator = group.length <= DOTS_MAX
+    ? `<div class="leader-dots" aria-hidden="true">${group.map((_, i) =>
+        `<span class="leader-dot${i === 0 ? ' active' : ''}"></span>`).join('')}</div>`
+    : `<span class="leader-counter" aria-hidden="true">1 / ${group.length}</span>`;
   return `
-    <div class="leader-card glass">
+    <div class="leader-card glass" data-leader="${id}" role="group" aria-label="${label}">
       <span class="leader-label">${label}</span>
-      <div class="leader-team">
+      <div class="leader-stage">
-        ${flagImg(team, 30, 20)}
+        <button type="button" class="leader-nav leader-prev" aria-label="${t('stats.leaderPrev')}">&lsaquo;</button>
-        <span class="leader-name">${team.name}</span>
+        <div class="leader-team">${leaderTeamHTML(group[0])}</div>
+        <button type="button" class="leader-nav leader-next" aria-label="${t('stats.leaderNext')}">&rsaquo;</button>
       </div>
       <span class="leader-value">${value}</span>
+      ${indicator}
     </div>`;
 }
 
+// Tied-leader carousels. Timers are tracked module-level and cleared at the top
+// of render() so a re-render (langchange/datachange) never leaves an interval
+// firing on detached DOM (cf. gotcha #6 — never double-schedule).
+let leaderTimers = [];
+function clearLeaderTimers() {
+  for (const id of leaderTimers) clearInterval(id);
+  leaderTimers = [];
+}
+
+// Auto-advance pauses on hover/focus and is disabled entirely under
+// prefers-reduced-motion (arrows still work). A manual arrow click restarts the
+// cadence implicitly: while the pointer/focus is on the card it stays paused, and
+// leaving the card starts a fresh full interval.
+function setupLeaderCarousels(root) {
+  const leaders = model.leaders;
+  if (!leaders) return;
+  const reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+  for (const leader of leaders) {
+    if (leader.group.length < 2) continue; // single team: static, no timer
+    const card = root.querySelector(`.leader-card[data-leader="${leader.id}"]`);
+    if (!card) continue;
+    const teamHost = card.querySelector('.leader-team');
+    const dots = card.querySelectorAll('.leader-dot');
+    const counter = card.querySelector('.leader-counter');
+    const group = leader.group;
+    let idx = 0;
+    let timer = null;
+    let paused = false;
+    const show = (i) => {
+      idx = (i + group.length) % group.length;
+      teamHost.innerHTML = leaderTeamHTML(group[idx]);
+      dots.forEach((dot, di) => dot.classList.toggle('active', di === idx));
+      if (counter) counter.textContent = `${idx + 1} / ${group.length}`;
+    };
+    const stop = () => {
+      if (!timer) return;
+      clearInterval(timer);
+      leaderTimers = leaderTimers.filter((x) => x !== timer);
+      timer = null;
+    };
+    const start = () => {
+      if (reduce || paused || timer) return;
+      timer = setInterval(() => show(idx + 1), ROTATE_MS);
+      leaderTimers.push(timer);
+    };
+    const pause = () => { paused = true; stop(); };
+    const resume = () => { paused = false; start(); };
+    card.querySelector('.leader-prev')?.addEventListener('click', () => show(idx - 1));
+    card.querySelector('.leader-next')?.addEventListener('click', () => show(idx + 1));
+    card.addEventListener('mouseenter', pause);
+    card.addEventListener('mouseleave', resume);
+    card.addEventListener('focusin', pause);
+    card.addEventListener('focusout', resume);
+    start();
+  }
+}
+
 function sortedTeamStats() {
   const dir = sortDir === 'asc' ? 1 : -1;
   if (sortKey === 'rank') {