diff --git a/src/app/(dashboard)/dashboard/batch/BatchListTab.tsx b/src/app/(dashboard)/dashboard/batch/BatchListTab.tsx
index f2906ca8f..7479a85c5 100644
--- a/src/app/(dashboard)/dashboard/batch/BatchListTab.tsx
+++ b/src/app/(dashboard)/dashboard/batch/BatchListTab.tsx
@@ -453,7 +453,7 @@ export default function BatchListTab({
                     <td className="px-4 py-3 text-[var(--color-text-muted)] text-xs">
                       {batch.model ?? "—"}
                     </td>
-                    {/* Progress — ProgressBarBicolor from F3; spinner when validating (G2) */}
+                    {/* Progress — ProgressBarBicolor from F3; spinner when validating (G2); (partial) suffix when expired with failures (G-AUD3) */}
                     <td className="px-4 py-3 min-w-[140px]">
                       {batch.status === "validating" ? (
                         <div className="flex items-center gap-2 text-xs text-yellow-400">
@@ -461,19 +461,31 @@ export default function BatchListTab({
                           Validating…
                         </div>
                       ) : total > 0 ? (
-                        <ProgressBarBicolor
-                          total={total}
-                          completed={done}
-                          failed={failed}
-                          showLabels
-                        />
+                        <div className="flex flex-col gap-0.5">
+                          <ProgressBarBicolor
+                            total={total}
+                            completed={done}
+                            failed={failed}
+                            showLabels
+                          />
+                          {effectiveStatus(batch) === "expired_with_failures" && (
+                            <span className="text-[10px] text-orange-400 italic">
+                              {t("batchListProgressPartial")}
+                            </span>
+                          )}
+                        </div>
                       ) : (
                         <span className="text-xs text-[var(--color-text-muted)]">—</span>
                       )}
                     </td>
-                    {/* Cost column — heuristic estimate (D8) */}
-                    <td className="px-4 py-3 text-xs text-[var(--color-text-muted)] whitespace-nowrap">
-                      {estimatedCost}
+                    {/* Cost column — heuristic estimate (D8) with -50% badge per wireframe §3 (G-AUD2) */}
+                    <td className="px-4 py-3 text-xs whitespace-nowrap">
+                      <span className="text-[var(--color-text-muted)]">{estimatedCost}</span>
+                      {estimatedCost !== "—" && (
+                        <span className="ml-1 text-[10px] text-emerald-500/90 bg-emerald-500/10 rounded px-1 py-0.5 align-middle">
+                          -50%
+                        </span>
+                      )}
                     </td>
                     <td className="px-4 py-3 text-xs text-[var(--color-text-muted)] whitespace-nowrap">
                       {relativeTime(batch.createdAt)}
diff --git a/src/app/(dashboard)/dashboard/batch/FilesListTab.tsx b/src/app/(dashboard)/dashboard/batch/FilesListTab.tsx
index f61d4767c..f47f52db5 100644
--- a/src/app/(dashboard)/dashboard/batch/FilesListTab.tsx
+++ b/src/app/(dashboard)/dashboard/batch/FilesListTab.tsx
@@ -249,31 +249,44 @@ export default function FilesListTab({
                     <td className="px-4 py-3 text-xs text-[var(--color-text-muted)] whitespace-nowrap">
                       {formatBytes(file.bytes)}
                     </td>
-                    {/* "Used by" column (D12) */}
+                    {/* "Used by" column (D12) — shows batch id + role (input/output/error) per plan §4 */}
                     <td className="px-4 py-3 text-xs">
                       {related.length === 0 ? (
                         <span className="text-[var(--color-text-muted)]">
                           {t("filesListUsedByNone")}
                         </span>
                       ) : (
-                        <div
-                          className="flex flex-col gap-0.5"
-                          title={related.map((b) => b.id).join(", ")}
-                        >
-                          {related.slice(0, 2).map((b) => (
-                            <span
-                              key={b.id}
-                              className="font-mono text-[10px] text-[var(--color-text-main)]"
+                        (() => {
+                          const roleFor = (b: BatchRecord): string =>
+                            b.inputFileId === file.id
+                              ? t("filesListUsedByRoleInput")
+                              : b.outputFileId === file.id
+                                ? t("filesListUsedByRoleOutput")
+                                : t("filesListUsedByRoleError");
+                          return (
+                            <div
+                              className="flex flex-col gap-0.5"
+                              title={related.map((b) => `${b.id} (${roleFor(b)})`).join(", ")}
                             >
-                              {b.id.slice(0, 16)}…
-                            </span>
-                          ))}
-                          {related.length > 2 && (
-                            <span className="text-[10px] text-[var(--color-text-muted)]">
-                              +{related.length - 2}
-                            </span>
-                          )}
-                        </div>
+                              {related.slice(0, 2).map((b) => (
+                                <span
+                                  key={b.id}
+                                  className="font-mono text-[10px] text-[var(--color-text-main)]"
+                                >
+                                  {b.id.slice(0, 12)}…{" "}
+                                  <span className="text-[var(--color-text-muted)]">
+                                    ({roleFor(b)})
+                                  </span>
+                                </span>
+                              ))}
+                              {related.length > 2 && (
+                                <span className="text-[10px] text-[var(--color-text-muted)]">
+                                  +{related.length - 2}
+                                </span>
+                              )}
+                            </div>
+                          );
+                        })()
                       )}
                     </td>
                     <td className="px-4 py-3 text-xs text-[var(--color-text-muted)] whitespace-nowrap">
diff --git a/src/app/(dashboard)/dashboard/batch/components/ExpirationBadge.tsx b/src/app/(dashboard)/dashboard/batch/components/ExpirationBadge.tsx
index 0fe1b5539..bf415283e 100644
--- a/src/app/(dashboard)/dashboard/batch/components/ExpirationBadge.tsx
+++ b/src/app/(dashboard)/dashboard/batch/components/ExpirationBadge.tsx
@@ -34,6 +34,10 @@ export default function ExpirationBadge({ expiresAt, variant = "default" }: Prop
       </span>
     );
   }
+  // D11 tiers: <1h critical (red) · <6h warning (yellow) · else normal (green).
+  // Plan specifies "<24h normal" — in practice batches always expire ≤24h (OpenAI window),
+  // so "else" maps to that case. If a provider (e.g. Gemini 48h) yields remaining >24h,
+  // we still render normal — graceful, no separate tier needed.
   let tone = "bg-emerald-500/15 text-emerald-400 border-emerald-500/25";
   let label = t("expirationBadgeNormal");
   if (remaining < 3600) {
diff --git a/src/i18n/messages/ar.json b/src/i18n/messages/ar.json
index c088884b1..c78363136 100644
--- a/src/i18n/messages/ar.json
+++ b/src/i18n/messages/ar.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "الصفحة الرئيسية",
diff --git a/src/i18n/messages/az.json b/src/i18n/messages/az.json
index 0e7a7eda5..adca85959 100644
--- a/src/i18n/messages/az.json
+++ b/src/i18n/messages/az.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/bg.json b/src/i18n/messages/bg.json
index 60d5650f1..aa4fd677d 100644
--- a/src/i18n/messages/bg.json
+++ b/src/i18n/messages/bg.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Начало",
diff --git a/src/i18n/messages/bn.json b/src/i18n/messages/bn.json
index 82a63e3ea..3a9a0d972 100644
--- a/src/i18n/messages/bn.json
+++ b/src/i18n/messages/bn.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/cs.json b/src/i18n/messages/cs.json
index 1a44bef00..700aff4d2 100644
--- a/src/i18n/messages/cs.json
+++ b/src/i18n/messages/cs.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Domov",
diff --git a/src/i18n/messages/da.json b/src/i18n/messages/da.json
index c45a6a465..95b40bcb3 100644
--- a/src/i18n/messages/da.json
+++ b/src/i18n/messages/da.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Hjem",
diff --git a/src/i18n/messages/de.json b/src/i18n/messages/de.json
index 2a261ae66..734f3de98 100644
--- a/src/i18n/messages/de.json
+++ b/src/i18n/messages/de.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Zuhause",
diff --git a/src/i18n/messages/en.json b/src/i18n/messages/en.json
index 24f1296ea..5ae1e6bde 100644
--- a/src/i18n/messages/en.json
+++ b/src/i18n/messages/en.json
@@ -773,6 +773,10 @@
     "filesListUploadButton": "Upload",
     "filesListUsedByColumn": "Used by",
     "filesListUsedByNone": "None",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)",
     "filesListDelete": "Delete",
     "filesListDownload": "Download",
     "batchDetailActionCancel": "Cancel batch",
diff --git a/src/i18n/messages/es.json b/src/i18n/messages/es.json
index dfaba6b71..c3e2d0899 100644
--- a/src/i18n/messages/es.json
+++ b/src/i18n/messages/es.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Inicio",
diff --git a/src/i18n/messages/fa.json b/src/i18n/messages/fa.json
index c5a8ca347..6a0e5351c 100644
--- a/src/i18n/messages/fa.json
+++ b/src/i18n/messages/fa.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/fi.json b/src/i18n/messages/fi.json
index b7cc1a955..e58fd5f9d 100644
--- a/src/i18n/messages/fi.json
+++ b/src/i18n/messages/fi.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Kotiin",
diff --git a/src/i18n/messages/fr.json b/src/i18n/messages/fr.json
index 5012e02d4..e9d74cb6a 100644
--- a/src/i18n/messages/fr.json
+++ b/src/i18n/messages/fr.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Accueil",
diff --git a/src/i18n/messages/gu.json b/src/i18n/messages/gu.json
index 45e1939d7..ddff5abd1 100644
--- a/src/i18n/messages/gu.json
+++ b/src/i18n/messages/gu.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/he.json b/src/i18n/messages/he.json
index 9bb52646f..bb7a55dcb 100644
--- a/src/i18n/messages/he.json
+++ b/src/i18n/messages/he.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "בית",
diff --git a/src/i18n/messages/hi.json b/src/i18n/messages/hi.json
index ba1a6ab43..3ec96291c 100644
--- a/src/i18n/messages/hi.json
+++ b/src/i18n/messages/hi.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "घर",
diff --git a/src/i18n/messages/hu.json b/src/i18n/messages/hu.json
index c1d9b3fc4..be85237ed 100644
--- a/src/i18n/messages/hu.json
+++ b/src/i18n/messages/hu.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Otthon",
diff --git a/src/i18n/messages/id.json b/src/i18n/messages/id.json
index 90206d7ff..3136251c3 100644
--- a/src/i18n/messages/id.json
+++ b/src/i18n/messages/id.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Rumah",
diff --git a/src/i18n/messages/in.json b/src/i18n/messages/in.json
index 059323cd6..c878b2f98 100644
--- a/src/i18n/messages/in.json
+++ b/src/i18n/messages/in.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/it.json b/src/i18n/messages/it.json
index ec8e1612f..971d4ebf2 100644
--- a/src/i18n/messages/it.json
+++ b/src/i18n/messages/it.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Casa",
diff --git a/src/i18n/messages/ja.json b/src/i18n/messages/ja.json
index 5c9ffc496..bdbf6dd66 100644
--- a/src/i18n/messages/ja.json
+++ b/src/i18n/messages/ja.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "ホーム",
diff --git a/src/i18n/messages/ko.json b/src/i18n/messages/ko.json
index 48bbedf14..0b7153ca8 100644
--- a/src/i18n/messages/ko.json
+++ b/src/i18n/messages/ko.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "홈",
diff --git a/src/i18n/messages/mr.json b/src/i18n/messages/mr.json
index e8ed9d61a..d1288680c 100644
--- a/src/i18n/messages/mr.json
+++ b/src/i18n/messages/mr.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/ms.json b/src/i18n/messages/ms.json
index c70817158..b3b915393 100644
--- a/src/i18n/messages/ms.json
+++ b/src/i18n/messages/ms.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Rumah",
diff --git a/src/i18n/messages/nl.json b/src/i18n/messages/nl.json
index 5ad2d2357..1e2769f49 100644
--- a/src/i18n/messages/nl.json
+++ b/src/i18n/messages/nl.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Thuis",
diff --git a/src/i18n/messages/no.json b/src/i18n/messages/no.json
index 2cec2f5af..dd3f16a0a 100644
--- a/src/i18n/messages/no.json
+++ b/src/i18n/messages/no.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Hjem",
diff --git a/src/i18n/messages/phi.json b/src/i18n/messages/phi.json
index 8921ad9f1..ca722513d 100644
--- a/src/i18n/messages/phi.json
+++ b/src/i18n/messages/phi.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Bahay",
diff --git a/src/i18n/messages/pl.json b/src/i18n/messages/pl.json
index 51d8f04de..76b1958fe 100644
--- a/src/i18n/messages/pl.json
+++ b/src/i18n/messages/pl.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Dom",
diff --git a/src/i18n/messages/pt-BR.json b/src/i18n/messages/pt-BR.json
index 4dd0b1e1d..7f3417c56 100644
--- a/src/i18n/messages/pt-BR.json
+++ b/src/i18n/messages/pt-BR.json
@@ -773,6 +773,10 @@
     "filesListUploadButton": "Enviar",
     "filesListUsedByColumn": "Usado por",
     "filesListUsedByNone": "Nenhum",
+    "filesListUsedByRoleInput": "entrada",
+    "filesListUsedByRoleOutput": "saída",
+    "filesListUsedByRoleError": "erro",
+    "batchListProgressPartial": "(parcial)",
     "filesListDelete": "Excluir",
     "filesListDownload": "Baixar",
     "batchDetailActionCancel": "Cancelar batch",
diff --git a/src/i18n/messages/pt.json b/src/i18n/messages/pt.json
index 5d24bca48..d691a98f4 100644
--- a/src/i18n/messages/pt.json
+++ b/src/i18n/messages/pt.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Página inicial",
diff --git a/src/i18n/messages/ro.json b/src/i18n/messages/ro.json
index 4dee59288..04a5c4f87 100644
--- a/src/i18n/messages/ro.json
+++ b/src/i18n/messages/ro.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Acasă",
diff --git a/src/i18n/messages/ru.json b/src/i18n/messages/ru.json
index db0a1c42b..ccfc48a6f 100644
--- a/src/i18n/messages/ru.json
+++ b/src/i18n/messages/ru.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Главная",
diff --git a/src/i18n/messages/sk.json b/src/i18n/messages/sk.json
index 5433d3372..e65b868bd 100644
--- a/src/i18n/messages/sk.json
+++ b/src/i18n/messages/sk.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Domov",
diff --git a/src/i18n/messages/sv.json b/src/i18n/messages/sv.json
index 1ef5d385f..7ecfb2327 100644
--- a/src/i18n/messages/sv.json
+++ b/src/i18n/messages/sv.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Hem",
diff --git a/src/i18n/messages/sw.json b/src/i18n/messages/sw.json
index fcbb28987..e91af7ec5 100644
--- a/src/i18n/messages/sw.json
+++ b/src/i18n/messages/sw.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/ta.json b/src/i18n/messages/ta.json
index 037dc9a55..12d339274 100644
--- a/src/i18n/messages/ta.json
+++ b/src/i18n/messages/ta.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/te.json b/src/i18n/messages/te.json
index 7acdd3f00..630df51c0 100644
--- a/src/i18n/messages/te.json
+++ b/src/i18n/messages/te.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/th.json b/src/i18n/messages/th.json
index 8c174c4eb..d9610121c 100644
--- a/src/i18n/messages/th.json
+++ b/src/i18n/messages/th.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "บ้าน",
diff --git a/src/i18n/messages/tr.json b/src/i18n/messages/tr.json
index bd6d1f5d3..92f9f83f5 100644
--- a/src/i18n/messages/tr.json
+++ b/src/i18n/messages/tr.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Ana Sayfa",
diff --git a/src/i18n/messages/uk-UA.json b/src/i18n/messages/uk-UA.json
index f053fb99f..be0f1ef8e 100644
--- a/src/i18n/messages/uk-UA.json
+++ b/src/i18n/messages/uk-UA.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "додому",
diff --git a/src/i18n/messages/ur.json b/src/i18n/messages/ur.json
index 696accf94..667855586 100644
--- a/src/i18n/messages/ur.json
+++ b/src/i18n/messages/ur.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Home",
diff --git a/src/i18n/messages/vi.json b/src/i18n/messages/vi.json
index d2b8d9bc2..46503f4e3 100644
--- a/src/i18n/messages/vi.json
+++ b/src/i18n/messages/vi.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "Trang chủ",
diff --git a/src/i18n/messages/zh-CN.json b/src/i18n/messages/zh-CN.json
index 866d6dd73..f9fa3e5a5 100644
--- a/src/i18n/messages/zh-CN.json
+++ b/src/i18n/messages/zh-CN.json
@@ -782,7 +782,11 @@
     "batchDetailCancelConfirm": "Cancel this batch? In-progress requests will stop.",
     "batchActionCancelError": "Failed to cancel batch. Try again.",
     "batchActionRetryError": "Failed to retry failed requests. Try again.",
-    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)"
+    "batchConceptRetentionNote": "Results and error files are retained for 30 days (Anthropic: 29 days)",
+    "filesListUsedByRoleInput": "input",
+    "filesListUsedByRoleOutput": "output",
+    "filesListUsedByRoleError": "error",
+    "batchListProgressPartial": "(partial)"
   },
   "sidebar": {
     "home": "首页",
diff --git a/tests/unit/dashboard/batch/list-regression.test.tsx b/tests/unit/dashboard/batch/list-regression.test.tsx
index 59d4bb966..cce3fbddf 100644
--- a/tests/unit/dashboard/batch/list-regression.test.tsx
+++ b/tests/unit/dashboard/batch/list-regression.test.tsx
@@ -341,7 +341,7 @@ describe("FilesListTab — rendering", () => {
     expect(el.textContent).toContain("filesListUsedByColumn");
   });
 
-  it("13. files with related batches (via inputFileId) show batch ID in used-by column", () => {
+  it("13. files with related batches (via inputFileId) show batch ID + role in used-by column", () => {
     const file = makeFile({ id: "file-used", purpose: "batch" });
     const batches = [
       {
@@ -357,7 +357,14 @@ describe("FilesListTab — rendering", () => {
     const el = render(
       <FilesListTab files={[file]} loading={false} batches={batches} />
     );
-    expect(el.textContent).toContain("batch-using-file");
+    // Truncated id prefix (12 chars) appears inline
+    expect(el.textContent).toContain("batch-using-");
+    // Role label is rendered next to the id (G-AUD1 — plan §4 "b1 (input)")
+    expect(el.textContent).toContain("filesListUsedByRoleInput");
+    // Tooltip carries the full id + role
+    const cell = el.querySelector("[title*='batch-using-file']");
+    expect(cell).not.toBeNull();
+    expect(cell?.getAttribute("title")).toContain("filesListUsedByRoleInput");
   });
 
   it("14. loading state shows spinner", () => {