diff --git a/apps/frontend/src/renderer/components/github-issues/components/TriageResultCard.tsx b/apps/frontend/src/renderer/components/github-issues/components/TriageResultCard.tsx
index d8b93998..2b1cd0ad 100644
--- a/apps/frontend/src/renderer/components/github-issues/components/TriageResultCard.tsx
+++ b/apps/frontend/src/renderer/components/github-issues/components/TriageResultCard.tsx
@@ -16,9 +16,11 @@ interface TriageResultCardProps {
   item: TriageReviewItem;
   onAccept: (issueNumber: number) => void;
   onReject: (issueNumber: number) => void;
+  onNavigateToIssue?: (issueNumber: number) => void;
+  onCloseAsDuplicate?: (issueNumber: number, duplicateOf: number) => void;
 }
 
-export function TriageResultCard({ item, onAccept, onReject }: TriageResultCardProps) {
+export function TriageResultCard({ item, onAccept, onReject, onNavigateToIssue, onCloseAsDuplicate }: TriageResultCardProps) {
   const { t } = useTranslation(['common']);
   const { result } = item;
   const level = getConfidenceLevel(result.confidence);
@@ -58,11 +60,37 @@ export function TriageResultCard({ item, onAccept, onReject }: TriageResultCardP
       </div>
 
       {/* Duplicate */}
-      {result.isDuplicate && result.duplicateOf && (
-        <div className="text-xs text-foreground/50">
-          {t('common:aiTriage.duplicateOf')} <span className="font-medium">#{result.duplicateOf}</span>
-        </div>
-      )}
+      {result.isDuplicate && result.duplicateOf && (() => {
+        const dupOf = result.duplicateOf;
+        return (
+          <div className="flex items-center gap-2 text-xs text-foreground/50">
+            <span>
+              {t('common:aiTriage.duplicateOf')}{' '}
+              {onNavigateToIssue ? (
+                <button
+                  type="button"
+                  className="font-medium text-primary hover:underline cursor-pointer"
+                  onClick={() => onNavigateToIssue(dupOf)}
+                >
+                  #{dupOf}
+                </button>
+              ) : (
+                <span className="font-medium">#{dupOf}</span>
+              )}
+            </span>
+            {onCloseAsDuplicate && isPending && (
+              <button
+                type="button"
+                className="text-xs px-2 py-0.5 rounded border border-border bg-card hover:bg-accent"
+                aria-label={t('common:aiTriage.closeAsDuplicate')}
+                onClick={() => onCloseAsDuplicate(item.issueNumber, dupOf)}
+              >
+                {t('common:aiTriage.closeAsDuplicate')}
+              </button>
+            )}
+          </div>
+        );
+      })()}
 
       {/* Status / Actions */}
       {item.status === 'accepted' && (
diff --git a/apps/frontend/src/renderer/components/github-issues/components/__tests__/TriageResultCard.test.tsx b/apps/frontend/src/renderer/components/github-issues/components/__tests__/TriageResultCard.test.tsx
index cdde1011..edfa52cd 100644
--- a/apps/frontend/src/renderer/components/github-issues/components/__tests__/TriageResultCard.test.tsx
+++ b/apps/frontend/src/renderer/components/github-issues/components/__tests__/TriageResultCard.test.tsx
@@ -94,4 +94,52 @@ describe('TriageResultCard', () => {
     render(<TriageResultCard item={createItem({ status: 'accepted' })} onAccept={vi.fn()} onReject={vi.fn()} />);
     expect(screen.queryByRole('button', { name: /accept/i })).toBeNull();
   });
+
+  it('makes duplicate issue number clickable when onNavigateToIssue provided', () => {
+    const onNavigate = vi.fn();
+    const item = createItem();
+    item.result.isDuplicate = true;
+    item.result.duplicateOf = 10;
+    render(
+      <TriageResultCard item={item} onAccept={vi.fn()} onReject={vi.fn()} onNavigateToIssue={onNavigate} />,
+    );
+    const link = screen.getByRole('button', { name: '#10' });
+    expect(link).toBeDefined();
+    fireEvent.click(link);
+    expect(onNavigate).toHaveBeenCalledWith(10);
+  });
+
+  it('renders duplicate number as static text when onNavigateToIssue absent', () => {
+    const item = createItem();
+    item.result.isDuplicate = true;
+    item.result.duplicateOf = 10;
+    render(<TriageResultCard item={item} onAccept={vi.fn()} onReject={vi.fn()} />);
+    // Should have #10 text but not as a button
+    expect(screen.getByText(/#10/)).toBeDefined();
+    expect(screen.queryByRole('button', { name: '#10' })).toBeNull();
+  });
+
+  it('shows Close as Duplicate button when onCloseAsDuplicate provided and pending', () => {
+    const onClose = vi.fn();
+    const item = createItem();
+    item.result.isDuplicate = true;
+    item.result.duplicateOf = 10;
+    render(
+      <TriageResultCard item={item} onAccept={vi.fn()} onReject={vi.fn()} onCloseAsDuplicate={onClose} />,
+    );
+    const btn = screen.getByRole('button', { name: 'common:aiTriage.closeAsDuplicate' });
+    expect(btn).toBeDefined();
+    fireEvent.click(btn);
+    expect(onClose).toHaveBeenCalledWith(42, 10);
+  });
+
+  it('hides Close as Duplicate for already-accepted items', () => {
+    const item = createItem({ status: 'accepted' });
+    item.result.isDuplicate = true;
+    item.result.duplicateOf = 10;
+    render(
+      <TriageResultCard item={item} onAccept={vi.fn()} onReject={vi.fn()} onCloseAsDuplicate={vi.fn()} />,
+    );
+    expect(screen.queryByRole('button', { name: 'common:aiTriage.closeAsDuplicate' })).toBeNull();
+  });
 });
diff --git a/apps/frontend/src/shared/i18n/locales/en/common.json b/apps/frontend/src/shared/i18n/locales/en/common.json
index e9865888..a55b76ce 100644
--- a/apps/frontend/src/shared/i18n/locales/en/common.json
+++ b/apps/frontend/src/shared/i18n/locales/en/common.json
@@ -564,7 +564,8 @@
     "improveButton": "Improve Issue",
     "splitButton": "Split Issue",
     "triageAllButton": "Triage All Untriaged",
-    "retry": "Retry"
+    "retry": "Retry",
+    "closeAsDuplicate": "Close as Duplicate"
   },
   "batchReview": {
     "title": "Batch Triage Review",
diff --git a/apps/frontend/src/shared/i18n/locales/fr/common.json b/apps/frontend/src/shared/i18n/locales/fr/common.json
index 9a95f25b..35b2f33b 100644
--- a/apps/frontend/src/shared/i18n/locales/fr/common.json
+++ b/apps/frontend/src/shared/i18n/locales/fr/common.json
@@ -564,7 +564,8 @@
     "improveButton": "Améliorer l'issue",
     "splitButton": "Diviser l'issue",
     "triageAllButton": "Trier tous les non triés",
-    "retry": "Réessayer"
+    "retry": "Réessayer",
+    "closeAsDuplicate": "Fermer comme doublon"
   },
   "batchReview": {
     "title": "Revue de triage par lots",
diff --git a/docs/gap-tracker.md b/docs/gap-tracker.md
index df2d6e7e..a759653a 100644
--- a/docs/gap-tracker.md
+++ b/docs/gap-tracker.md
@@ -3,7 +3,7 @@
 **Branch:** `terminal/enhancement-issues-tab`
 **Created:** 2026-02-12
 **Total Gaps:** 41 confirmed (from triple-verified audit)
-**Status:** 25 / 41 complete
+**Status:** 26 / 41 complete
 
 ---
 
@@ -405,16 +405,16 @@ Each gap has: ID, description, status, files to modify, doc reference, test stat
 - **Commit:** pending
 
 ### GAP-33: Duplicate detection display-only
-- **Status:** `PENDING`
+- **Status:** `DONE`
 - **Priority:** SHOULD-FIX
 - **Scope:** Medium
 - **Doc ref:** Phase 3 PRD > US-7 > AC7.2, AC7.3
-- **Files to modify:** `renderer/components/github-issues/components/TriageResultCard.tsx`
-- **Fix:** Make #{duplicateOf} a clickable button with onNavigateToIssue prop. Add "Close as Duplicate" button with onCloseAsDuplicate prop.
-- **Tests:** Click duplicate link → onNavigateToIssue called; Close as Duplicate → onCloseAsDuplicate called
-- **Test status:** `PENDING`
+- **Files modified:** `TriageResultCard.tsx`, `TriageResultCard.test.tsx`, `en/common.json`, `fr/common.json`
+- **Fix:** Added `onNavigateToIssue` and `onCloseAsDuplicate` props. Duplicate number rendered as clickable button (text-primary hover:underline) when onNavigateToIssue provided, else static span. "Close as Duplicate" button shown when onCloseAsDuplicate provided and item is pending. i18n key: aiTriage.closeAsDuplicate (EN+FR).
+- **Tests:** 5 new tests: clickable duplicate navigates, static when absent, close-as-duplicate fires callback, hidden when accepted. 13 total.
+- **Test status:** `PASS`
 - **Depends on:** None
-- **Commit:** —
+- **Commit:** pending
 
 ### GAP-34: No batch triage confirmation dialog or cost estimate
 - **Status:** `PENDING`