Add architecture longread and remove dead code found during review

- docs: longread.md — deep architecture/flow review of the whole
  platform (services, event bus reality vs docs, AI/ML stack honesty
  check, tech debt inventory)
- ai_orchestrator_service/voice.py: drop _voice_decision_legacy
  (unreferenced) and the shadowed first _voice_decision definition
  (silently overwritten by the real one, dead code)
- ui/analyst/app.js: drop duplicate dead definitions of
  loadSavedAnalyticsViews/saveAnalyticsView/deleteAnalyticsView and
  the first loadAnalyticsTrend implementation, all shadowed by later
  declarations in the same file; kept the intentional AI-mode
  drilldown wrapper layer (openAnalyticsDrilldown/exportAnalyticsDrilldownCsv/etc.)
  since that duplication is deliberate delegation, not dead code
- ui/operator/vendor/sip-0.21.2.min.js: remove byte-identical orphaned
  duplicate of ui/operator/sip-0.21.2.min.js (unreferenced anywhere)

Verified via full pytest run: identical set of 97 pre-existing
failures before and after (sales_* test-isolation ordering issue and
one known persona-prompt test), no new regressions.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

ui/analyst/app.js

@@ -2213,28 +2213,6 @@ function normalizeSavedAnalyticsView(item = {}) {
   };
 }
 
-async function loadSavedAnalyticsViews() {
-  try {
-    const items = await api('reporting', 'reports/views');
-    state.analytics.savedViews = Array.isArray(items)
-      ? items
-          .filter((item) => item && typeof item === 'object')
-          .map((item) => normalizeSavedAnalyticsView(item))
-          .sort((a, b) => String(b.updatedAt).localeCompare(String(a.updatedAt)))
-      : [];
-  } catch (err) {
-    state.analytics.savedViews = [];
-    state.analytics.statusMessage = `Не удалось загрузить сохранённые виды: ${err.message}`;
-  }
-  if (
-    state.analytics.activeViewId
-    && !state.analytics.savedViews.some((item) => item.id === state.analytics.activeViewId)
-  ) {
-    state.analytics.activeViewId = '';
-  }
-  renderSavedAnalyticsViews();
-}
-
 function renderSavedAnalyticsViews() {
   const select = $('analyticsSavedViewSelect');
   const input = $('analyticsSavedViewName');
@@ -2274,56 +2252,6 @@ function renderSavedAnalyticsViews() {
   meta.textContent = parts.join(' · ');
 }
 
-async function saveAnalyticsView() {
-  syncAnalyticsStateFromControls();
-  const input = $('analyticsSavedViewName');
-  const name = input?.value.trim() || suggestAnalyticsViewName();
-  try {
-    const view = await api('reporting', 'reports/views', {
-      method: 'POST',
-      body: JSON.stringify({
-        id: state.analytics.activeViewId || null,
-        name,
-        snapshot: analyticsCurrentSnapshot(),
-      }),
-    });
-    const normalized = normalizeSavedAnalyticsView(view);
-    const existingIndex = state.analytics.savedViews.findIndex((item) => item.id === normalized.id);
-    if (existingIndex >= 0) {
-      state.analytics.savedViews.splice(existingIndex, 1, normalized);
-      state.analytics.statusMessage = `Вид «${name}» обновлён.`;
-    } else {
-      state.analytics.savedViews.unshift(normalized);
-      state.analytics.statusMessage = `Вид «${name}» сохранён.`;
-    }
-    state.analytics.savedViews = state.analytics.savedViews
-      .sort((a, b) => String(b.updatedAt).localeCompare(String(a.updatedAt)))
-      .slice(0, 12);
-    state.analytics.activeViewId = normalized.id;
-  } catch (err) {
-    state.analytics.statusMessage = `Не удалось сохранить вид: ${err.message}`;
-  }
-  renderSavedAnalyticsViews();
-}
-
-async function deleteAnalyticsView() {
-  const activeView = state.analytics.savedViews.find((item) => item.id === state.analytics.activeViewId) || null;
-  if (!activeView) {
-    state.analytics.statusMessage = 'Сначала выберите вид, который нужно удалить.';
-    renderSavedAnalyticsViews();
-    return;
-  }
-  try {
-    await api('reporting', `reports/views/${encodeURIComponent(activeView.id)}`, { method: 'DELETE' });
-    state.analytics.savedViews = state.analytics.savedViews.filter((item) => item.id !== activeView.id);
-    state.analytics.activeViewId = '';
-    state.analytics.statusMessage = `Вид «${activeView.name}» удалён.`;
-  } catch (err) {
-    state.analytics.statusMessage = `Не удалось удалить вид: ${err.message}`;
-  }
-  renderSavedAnalyticsViews();
-}
-
 function detachActiveAnalyticsView() {
   if (!state.analytics.activeViewId) {
     return;
@@ -5021,24 +4949,6 @@ function buildTrendBuckets(range, preset, custom) {
   return buckets;
 }
 
-async function loadAnalyticsTrend(rangeMeta, requestId) {
-  const buckets = buildTrendBuckets(rangeMeta.current, rangeMeta.preset, rangeMeta.custom);
-  const items = await Promise.all(
-    buckets.map(async (bucket) => {
-      try {
-        const payload = await fetchAnalyticsKpi(bucket.range);
-        return { ...bucket, payload };
-      } catch {
-        return { ...bucket, payload: emptyKpiEnvelope(bucket.range.from.toISOString(), bucket.range.to.toISOString()) };
-      }
-    }),
-  );
-  if (requestId !== state.analytics.requestId) {
-    return [];
-  }
-  return items;
-}
-
 function aiAnalyticsIntervalForRange(rangeMeta) {
   const durationMs = Math.max(0, rangeMeta.current.to.getTime() - rangeMeta.current.from.getTime());
   return durationMs <= 36 * 60 * 60 * 1000 ? 'hour' : 'day';