M25: expose provenance-aware knowledge statistics

frontend/src/pages/Automation.tsx

@@ -215,7 +215,18 @@ export function Automation() {
                 ? t("cards.checking")
                 : knowledge
                 ? knowledge.document_count === null
-                  ? t("cards.knowledgeSummaryIndexUnknown", { collection: knowledge.collection })
+                  ? knowledge.statistics_state === "sync_reported"
+                    ? t("cards.knowledgeSummarySyncReported", {
+                        collection: knowledge.collection,
+                        sourceCount: knowledge.source_document_count,
+                        synced: knowledge.reported_synced_document_count,
+                        failed: knowledge.reported_failed_document_count,
+                        when: knowledge.last_sync_at ? formatDateTime(knowledge.last_sync_at) : "—",
+                      })
+                    : t("cards.knowledgeSummaryIndexUnknown", {
+                        collection: knowledge.collection,
+                        sourceCount: knowledge.source_document_count,
+                      })
                   : t(knowledge.provider === "ragcore" ? "cards.knowledgeSummaryRagcore" : "cards.knowledgeSummaryDemo", {
                       count: knowledge.document_count,
                       collection: knowledge.collection,

frontend/src/pages/Dashboard.tsx

@@ -245,7 +245,7 @@ export function Dashboard() {
               <IntegrationMark kind="rag" />
               <div>
                 <strong>{t("integrationPulse.knowledgeTitle")}</strong>
-                <span>{knowledge ? (knowledge.document_count === null ? t("integrationPulse.knowledgeIndexUnknown") : t("integrationPulse.knowledgeSummary", { count: knowledge.document_count })) : t("integrationPulse.knowledgeUnavailable")}</span>
+                <span>{knowledge ? (knowledge.document_count === null ? t("integrationPulse.knowledgeIndexUnknown", { count: knowledge.source_document_count }) : t("integrationPulse.knowledgeSummary", { count: knowledge.document_count })) : t("integrationPulse.knowledgeUnavailable")}</span>
               </div>
               <StatusBadge
                 status={knowledge?.available ? "available" : "unavailable"}

frontend/src/pages/Knowledge.tsx

@@ -5,6 +5,7 @@ import { describeApiError, type ApiErrorInfo } from "../api/errorMessages";
 import type { GroundedAnswer, KnowledgeHealth } from "../api/types";
 import { Icon } from "../components/Icons";
 import { ApiErrorNotice, PageHeader } from "../components/PageChrome";
+import { useLocaleFormat } from "../i18n/format";
 import { PRODUCT_NAME } from "../product";
 
 interface Exchange {
@@ -21,6 +22,7 @@ function isOpaqueVersion(value: string): boolean {
 
 export function Knowledge() {
   const { t, i18n } = useTranslation(["knowledge", "errors"]);
+  const { formatDateTime } = useLocaleFormat();
   const [status, setStatus] = useState<KnowledgeHealth | null>(null);
   const [statusSettled, setStatusSettled] = useState(false);
   const [question, setQuestion] = useState("");
@@ -138,6 +140,24 @@ export function Knowledge() {
       {statusSettled && status?.provider === "demo" && (
         <p className="knowledge-provider-note"><Icon name="shield" /> {t("providerNote")}</p>
       )}
+      {statusSettled && status?.provider === "ragcore" && (
+        <div className="knowledge-index-evidence" role="status">
+          <div><strong>{status.source_document_count}</strong><span>{t("statistics.sourceDocuments")}</span></div>
+          <div>
+            <strong>{status.reported_synced_document_count ?? "—"}</strong>
+            <span>{t("statistics.reportedSynced")}</span>
+          </div>
+          <div>
+            <strong>{status.reported_failed_document_count ?? "—"}</strong>
+            <span>{t("statistics.reportedFailed")}</span>
+          </div>
+          <p>
+            {status.last_sync_at
+              ? t("statistics.lastSync", { when: formatDateTime(status.last_sync_at) })
+              : t("statistics.noSyncReport")}
+          </p>
+        </div>
+      )}
 
       <form className="panel knowledge-form" onSubmit={handleSubmit} aria-labelledby="ask-heading">
         <div className="ask-heading">