АРЧ АП11 - Commit title: Добавить контрактный слой переходов и capability-деклараций ассистента

llm_normalizer/backend/src/services/address_runtime/decomposeStage.ts

@@ -533,6 +533,30 @@ function hasSelectedObjectInventorySignal(text: string): boolean {
   return /(?:по\s+выбранному\s+объекту|for\s+selected\s+object)/iu.test(String(text ?? ""));
 }
 
+function hasSelectedObjectInlineSnapshotMetadata(text: string): boolean {
+  return /(?:дата\s+строки|строка\s+от|количество\s*:|стоимость\s*:|склад\s*:|организация\s*:|\|\s*(?:склад|количество|стоимость|организация|дата\s+строки)\s*:)/iu.test(
+    String(text ?? "")
+  );
+}
+
+function extractSelectedObjectItemFromFollowupText(text: string): string | null {
+  const rawSelectedObject = toNonEmptyString(extractSelectedObjectQuotedValue(text));
+  if (!rawSelectedObject) {
+    return null;
+  }
+  const firstLine = rawSelectedObject
+    .replace(/\r\n?/g, "\n")
+    .split("\n")
+    .map((line) => line.trim())
+    .find(Boolean);
+  const primarySegment = String(firstLine ?? rawSelectedObject)
+    .replace(/^\d+\.\s*/, "")
+    .split("|")[0]
+    ?.trim();
+  const normalized = toNonEmptyString(primarySegment);
+  return normalized;
+}
+
 export function hasInventorySupplierFollowupCue(text: string): boolean {
   return hasInventorySupplierCue(String(text ?? ""));
 }
@@ -800,7 +824,7 @@ function mergeFollowupFilters(
         intent === "inventory_aging_by_purchase_date")
     ) {
       const inheritedItem = previousItem ?? previousAnchorItem;
-      const explicitQuotedItem = toNonEmptyString(extractSelectedObjectQuotedValue(userMessage));
+      const explicitQuotedItem = extractSelectedObjectItemFromFollowupText(userMessage);
       const currentItem = toNonEmptyString(merged.item);
       const shouldAdoptExplicitQuotedItem =
         Boolean(explicitQuotedItem) &&
@@ -873,6 +897,23 @@ function mergeFollowupFilters(
         }
       }
     }
+    if (
+      (Boolean(previousPeriodFrom) || Boolean(previousPeriodTo)) &&
+      hasSelectedObjectInventorySignal(userMessage) &&
+      hasSelectedObjectInlineSnapshotMetadata(userMessage) &&
+      (intent === "inventory_purchase_provenance_for_item" || intent === "inventory_purchase_documents_for_item") &&
+      !hasExplicitPeriodLiteral(userMessage) &&
+      !hasExplicitCurrentDateHint(userMessage)
+    ) {
+      if (previousPeriodFrom && merged.period_from !== previousPeriodFrom) {
+        merged.period_from = previousPeriodFrom;
+        reasons.push("period_from_from_followup_context");
+      }
+      if (previousPeriodTo && merged.period_to !== previousPeriodTo) {
+        merged.period_to = previousPeriodTo;
+        reasons.push("period_to_from_followup_context");
+      }
+    }
     if (
       !sameDateRequested &&
       (intent === "inventory_on_hand_as_of_date" || intent === "inventory_supplier_stock_overlap_as_of_date") &&