feat: what-if simulator (no data changes)

Adds a "Симулятор" block that recomputes KPIs against a virtual scenario
without modifying the source data:

- optimization slider: reduce every function's time by 0–80%
- exclude top-N longest functions slider
- exclude an entire auto-stage (dropdown)
- recruiters (FTE) slider: 1–10
- vacancies-per-month slider: 0–50

Output is a side-by-side table (Было / Стало / Δ%) for cycle time,
days, weeks, monthly load, FTE %, capacity, overload, recruiters needed,
and cost. Color-codes improvements green, regressions red.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app.js

@@ -38,7 +38,15 @@ const state = {
   search: '',
   vacancies: 15,
   salary: 500000,
-  sort: { col: 'num', dir: 1 },   // 1=asc, -1=desc
+  sort: { col: 'num', dir: 1 },
+  sim: {
+    enabled: false,
+    optimizePct: 0,       // % сокращения времени всех функций
+    excludeTopN: 0,       // исключить N самых долгих функций
+    excludeStage: '',     // исключить целый этап (auto-stage)
+    recruiters: 1,        // кол-во рекрутеров (FTE)
+    vacancies: 15,        // план вакансий в симуляции
+  },
 };
 
 // === Init ===
@@ -49,12 +57,41 @@ addEventListener('DOMContentLoaded', () => {
   $('group-filter').onchange = e => { state.groupFilter = [...e.target.selectedOptions].map(o => o.value); render(); };
   $('search-input').oninput = e => { state.search = e.target.value.toLowerCase().trim(); render(); };
   $('theme-toggle').onclick = toggleTheme;
-  $('inp-vacancies').oninput = e => { state.vacancies = +e.target.value || 0; render(); };
+  $('inp-vacancies').oninput = e => { state.vacancies = +e.target.value || 0; state.sim.vacancies = state.vacancies; renderSimControls(); render(); };
   $('inp-salary').oninput = e => { state.salary = +e.target.value || 0; render(); };
   initTableSort();
+  initSimulator();
   autoLoad();
 });
 
+function initSimulator() {
+  $('sim-toggle').onchange = e => { state.sim.enabled = e.target.checked; $('sim-controls').hidden = !e.target.checked; render(); };
+  $('sim-reset').onclick = () => {
+    state.sim = { enabled: true, optimizePct: 0, excludeTopN: 0, excludeStage: '', recruiters: 1, vacancies: state.vacancies };
+    renderSimControls();
+    render();
+  };
+  const bind = (id, key, parse = v => +v) => {
+    $(id).oninput = e => { state.sim[key] = parse(e.target.value); renderSimControls(); render(); };
+  };
+  bind('sim-optimize', 'optimizePct');
+  bind('sim-exclude-top', 'excludeTopN');
+  bind('sim-recruiters', 'recruiters');
+  bind('sim-vacancies', 'vacancies');
+  $('sim-stage').onchange = e => { state.sim.excludeStage = e.target.value; render(); };
+}
+
+function renderSimControls() {
+  $('sim-optimize-val').textContent = `${state.sim.optimizePct}%`;
+  $('sim-exclude-top-val').textContent = state.sim.excludeTopN;
+  $('sim-recruiters-val').textContent = state.sim.recruiters;
+  $('sim-vacancies-val').textContent = state.sim.vacancies;
+  $('sim-optimize').value = state.sim.optimizePct;
+  $('sim-exclude-top').value = state.sim.excludeTopN;
+  $('sim-recruiters').value = state.sim.recruiters;
+  $('sim-vacancies').value = state.sim.vacancies;
+}
+
 function initTableSort() {
   document.querySelectorAll('#table thead th').forEach(th => {
     th.style.cursor = 'pointer';
@@ -266,6 +303,88 @@ function render() {
   chartStages(m.byStage);
   chartFteScenario(m.daysPerCycle);
   renderTable(items, m.bottleneckIds);
+
+  // Симулятор
+  populateStageOptions(m.byStage);
+  renderSim(items, m);
+}
+
+function populateStageOptions(byStage) {
+  const sel = $('sim-stage');
+  const current = sel.value;
+  const stages = Object.keys(byStage);
+  sel.innerHTML = `<option value="">— (не исключать) —</option>` + stages.map(s => `<option value="${esc(s)}">${esc(s)}</option>`).join('');
+  if (stages.includes(current)) sel.value = current;
+}
+
+function simulateItems(items) {
+  const { optimizePct, excludeTopN, excludeStage } = state.sim;
+  let arr = items.filter(i => i.minutes != null);
+  if (excludeStage) arr = arr.filter(i => i.stage !== excludeStage);
+  if (excludeTopN > 0) {
+    const sorted = [...arr].sort((a, b) => b.minutes - a.minutes);
+    const excludeIds = new Set(sorted.slice(0, excludeTopN).map(i => i.num));
+    arr = arr.filter(i => !excludeIds.has(i.num));
+  }
+  const k = Math.max(0, 1 - optimizePct / 100);
+  return arr.map(i => ({ ...i, minutes: i.minutes * k }));
+}
+
+function renderSim(items, base) {
+  if (!state.sim.enabled) { $('sim-output').hidden = true; return; }
+  $('sim-output').hidden = false;
+  const simItems = simulateItems(items);
+  const simTotal = simItems.reduce((a, b) => a + b.minutes, 0);
+  const simHours = simTotal / 60;
+  const simDays = simTotal / MIN_DAY;
+  const simWeeks = simDays / DAYS_WEEK;
+  const v = state.sim.vacancies;
+  const r = Math.max(1, state.sim.recruiters);
+  const simMonthlyDays = v * simDays;
+  const simFte = v > 0 ? (v * simHours) / (HOURS_MONTH * r) * 100 : 0;
+  const simCapacity = simHours > 0 ? (HOURS_MONTH * r) / simHours : 0;
+  const simOverload = simMonthlyDays - DAYS_MONTH * r;
+  const simRecruitersNeeded = Math.max(1, Math.ceil(simMonthlyDays / DAYS_MONTH));
+  const simCost = state.salary > 0 ? state.salary * simHours / HOURS_MONTH * r : null;
+
+  const rows = [
+    ['Функций в работе',       base.count,                   simItems.length,         x => x],
+    ['Время на 1 цикл, ч',     base.hours,                   simHours,                x => x.toFixed(1)],
+    ['Время на 1 цикл, дни',   base.daysPerCycle,            simDays,                 x => x.toFixed(2)],
+    ['Время на 1 цикл, недели',base.weeksPerCycle,           simWeeks,                x => x.toFixed(2)],
+    ['Дней/мес (план)',        base.monthlyDays,             simMonthlyDays,          x => x.toFixed(1)],
+    ['Загрузка FTE, %',        base.fte,                     simFte,                  x => Math.round(x) + '%'],
+    ['Capacity, вак/мес',      base.capacity,                simCapacity,             x => x.toFixed(1)],
+    ['Перегруз/запас, дней',   base.monthOverload,           simOverload,             x => (x >= 0 ? '+' : '') + x.toFixed(1)],
+    ['Рекрутеров надо',        base.recruitersNeeded,        simRecruitersNeeded,     x => x],
+    ['Стоимость цикла, ₸',     base.cost,                    simCost,                 x => x != null ? fmt(Math.round(x)) : '—'],
+  ];
+
+  $('sim-output').innerHTML = `
+    <table class="sim-table">
+      <thead><tr><th>Метрика</th><th>Было</th><th>Стало</th><th>Δ</th></tr></thead>
+      <tbody>${rows.map(([lbl, was, now, f]) => {
+        const wasN = typeof was === 'number' ? was : 0;
+        const nowN = typeof now === 'number' ? now : 0;
+        const delta = nowN - wasN;
+        const pct = wasN ? (delta / wasN * 100) : 0;
+        const better = (lbl.includes('FTE') || lbl.includes('Перегруз') || lbl.includes('Дней') || lbl.includes('Время') || lbl.includes('Стоимость') || lbl.includes('Рекрутеров надо')) ? delta < 0 : delta > 0;
+        const cls = delta === 0 ? '' : (better ? 'good' : 'bad');
+        return `<tr>
+          <td>${lbl}</td>
+          <td>${was == null ? '—' : f(was)}</td>
+          <td><b>${now == null ? '—' : f(now)}</b></td>
+          <td class="${cls}">${delta === 0 || was == null || now == null ? '' : `${delta > 0 ? '+' : ''}${pct.toFixed(0)}%`}</td>
+        </tr>`;
+      }).join('')}</tbody>
+    </table>
+    <p class="hint">
+      Сценарий: оптимизация всех функций на <b>${state.sim.optimizePct}%</b>,
+      исключено топ-<b>${state.sim.excludeTopN}</b>,
+      исключён этап: <b>${state.sim.excludeStage || '—'}</b>,
+      рекрутеров: <b>${r}</b>, вакансий/мес: <b>${v}</b>.
+    </p>
+  `;
 }
 
 function renderCards(id, cards) {
@@ -379,7 +498,7 @@ function chartFteScenario(daysPerCycle) {
   const colors = ftePct.map(p => p <= 100 ? '#34d399' : p <= 150 ? '#fbbf24' : '#f87171');
   Plotly.newPlot('chart-fte-scenario', [{
     type: 'bar', x: xs, y: ftePct, marker: { color: colors },
-    text: xs.map((v, i) => v === state.vacancies ? '← план' : ''),
+    text: xs.map(v => v === state.vacancies ? '← план' : ''),
     textposition: 'outside',
     hovertemplate: '<b>%{x} вак/мес</b><br>FTE: %{y:.0f}%<extra></extra>',
   }], layout({

index.html

@@ -44,6 +44,41 @@
       <div id="workload-kpi" class="kpi-grid"></div>
     </section>
 
+    <section class="block">
+      <h2>🧪 Симулятор «что если»</h2>
+      <p class="hint">Не меняет исходные данные. Покажет, как изменятся KPI при заданных условиях.</p>
+      <label class="sim-toggle"><input type="checkbox" id="sim-toggle"> Включить симулятор</label>
+
+      <div id="sim-controls" class="sim-controls" hidden>
+        <div class="sim-row">
+          <label>Оптимизация всех функций: <span id="sim-optimize-val">0%</span>
+            <input type="range" id="sim-optimize" min="0" max="80" step="5" value="0">
+          </label>
+        </div>
+        <div class="sim-row">
+          <label>Исключить топ-N длинных функций: <span id="sim-exclude-top-val">0</span>
+            <input type="range" id="sim-exclude-top" min="0" max="10" step="1" value="0">
+          </label>
+        </div>
+        <div class="sim-row">
+          <label>Исключить этап (авто-классификатор):
+            <select id="sim-stage"></select>
+          </label>
+        </div>
+        <div class="sim-row">
+          <label>Рекрутеров (FTE): <span id="sim-recruiters-val">1</span>
+            <input type="range" id="sim-recruiters" min="1" max="10" step="1" value="1">
+          </label>
+          <label>Вакансий/мес: <span id="sim-vacancies-val">15</span>
+            <input type="range" id="sim-vacancies" min="0" max="50" step="1" value="15">
+          </label>
+        </div>
+        <button id="sim-reset" type="button">↺ Сбросить</button>
+      </div>
+
+      <div id="sim-output" hidden></div>
+    </section>
+
     <section class="block">
       <h2>📈 Сценарий: FTE % vs число вакансий</h2>
       <p class="hint">Зелёный — норма (≤100%), жёлтый — перегруз ≤150%, красный — критично. Пунктир — 100% FTE.</p>
@@ -107,6 +142,6 @@
 
   <p id="placeholder">Загрузка данных… Если дашборд не появился — нажмите «📁 Загрузить .xlsx».</p>
 
-  <script src="./app.js?v=5"></script>
+  <script src="./app.js?v=6"></script>
 </body>
 </html>

styles.css

@@ -58,6 +58,21 @@ tr.bottleneck td:nth-child(2) { font-weight: 600; }
 #table thead th { user-select: none; }
 #table thead th:hover { background: var(--accent); color: #fff; }
 
+.sim-toggle { display: inline-flex; gap: .5rem; align-items: center; cursor: pointer; margin-bottom: 1rem; font-weight: 500; }
+.sim-controls { display: flex; flex-direction: column; gap: .9rem; padding: 1rem; background: var(--card); border-radius: 8px; margin-bottom: 1rem; }
+.sim-row { display: flex; gap: 1.5rem; flex-wrap: wrap; }
+.sim-row label { flex: 1; min-width: 240px; display: flex; flex-direction: column; gap: .35rem; font-size: .85rem; color: var(--muted); }
+.sim-row input[type=range] { width: 100%; accent-color: var(--accent); }
+.sim-row span { color: var(--accent); font-weight: 700; font-size: 1rem; }
+#sim-reset { background: var(--card); color: var(--fg); border: 1px solid var(--border); border-radius: 6px; padding: .45rem .9rem; cursor: pointer; align-self: flex-start; }
+#sim-reset:hover { background: var(--accent); color: #fff; }
+
+.sim-table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
+.sim-table th, .sim-table td { padding: .55rem .7rem; border-bottom: 1px solid var(--border); text-align: right; }
+.sim-table th:first-child, .sim-table td:first-child { text-align: left; }
+.sim-table td.good { color: #34d399; font-weight: 600; }
+.sim-table td.bad  { color: #f87171; font-weight: 600; }
+
 table { width: 100%; border-collapse: collapse; }
 th, td { padding: .55rem .7rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; font-size: .88rem; }
 th { background: var(--card); font-weight: 600; position: sticky; top: 0; }