diff --git a/frontend/src/assets/dup-report.css b/frontend/src/assets/dup-report.css
new file mode 100644
index 0000000..d7d1785
--- /dev/null
+++ b/frontend/src/assets/dup-report.css
@@ -0,0 +1,50 @@
+/* The near-duplicate report, shared by KnowledgeView (notes/tasks) and
+   SnippetListView (snippets) so the two reports read as one feature. Load
+   with <style src="@/assets/dup-report.css" /> beside the view's scoped
+   block; the view keeps only its own extras (.dup-claimed, .dup-action).
+   Promoted from two identical scoped copies in #2903 (milestone 299). */
+.dup-panel {
+  margin-bottom: 1.25rem;
+  padding: 0.85rem 1rem;
+  border: 1px solid var(--fs-border-color);
+  border-radius: 8px;
+  background: var(--fs-surface-hover);
+}
+.dup-empty,
+.dup-head {
+  margin: 0 0 0.5rem;
+  font-size: 0.85rem;
+  color: var(--fs-text-tertiary);
+}
+.dup-empty { margin-bottom: 0; }
+.dup-group {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  flex-wrap: wrap;
+  padding: 0.5rem 0;
+  border-top: 1px solid var(--fs-border-color);
+}
+.dup-members {
+  display: flex;
+  gap: 0.4rem;
+  flex-wrap: wrap;
+  flex: 1 1 20rem;
+  min-width: 0;
+}
+.dup-member {
+  font-size: 0.8rem;
+  padding: 0.1rem 0.45rem;
+  border-radius: 4px;
+  background: color-mix(in srgb, var(--fs-text-tertiary) 12%, transparent);
+  color: var(--fs-text-primary);
+  text-decoration: none;
+  overflow-wrap: anywhere;
+}
+.dup-member:hover { background: var(--fs-surface-hover); }
+.dup-score {
+  font-size: 0.75rem;
+  color: var(--fs-text-tertiary);
+  font-variant-numeric: tabular-nums;
+  white-space: nowrap;
+}
diff --git a/frontend/src/views/KnowledgeView.vue b/frontend/src/views/KnowledgeView.vue
index b954d75..73a09d1 100644
--- a/frontend/src/views/KnowledgeView.vue
+++ b/frontend/src/views/KnowledgeView.vue
@@ -574,6 +574,7 @@ onUnmounted(() => {
   </div>
 </template>
 
+<style src="@/assets/dup-report.css" />
 <style scoped>
 /* ── Root layout ─────────────────────────────────────────── */
 .knowledge-root {
@@ -1042,56 +1043,6 @@ onUnmounted(() => {
 }
 
 
-/* ── Near-duplicate report ──────────────────────────────────────────────────
-   Mirrors SnippetListView's panel so the two reports read as one feature.
-   Scoped styles can't be shared across SFCs; if a third view ever grows this
-   panel, promote the family to components.css and record it (#2464's rule:
-   two-or-more is when a recipe earns the shared sheet). */
-.dup-panel {
-  margin-bottom: 1.25rem;
-  padding: 0.85rem 1rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: 8px;
-  background: var(--fs-surface-hover);
-}
-.dup-empty,
-.dup-head {
-  margin: 0 0 0.5rem;
-  font-size: 0.85rem;
-  color: var(--fs-text-tertiary);
-}
-.dup-empty { margin-bottom: 0; }
-.dup-group {
-  display: flex;
-  align-items: center;
-  gap: 0.75rem;
-  flex-wrap: wrap;
-  padding: 0.5rem 0;
-  border-top: 1px solid var(--fs-border-color);
-}
-.dup-members {
-  display: flex;
-  gap: 0.4rem;
-  flex-wrap: wrap;
-  flex: 1 1 20rem;
-  min-width: 0;
-}
-.dup-member {
-  font-size: 0.8rem;
-  padding: 0.1rem 0.45rem;
-  border-radius: 4px;
-  background: color-mix(in srgb, var(--fs-text-tertiary) 12%, transparent);
-  color: var(--fs-text-primary);
-  text-decoration: none;
-  overflow-wrap: anywhere;
-}
-.dup-member:hover { background: var(--fs-surface-hover); }
-.dup-score {
-  font-size: 0.75rem;
-  color: var(--fs-text-tertiary);
-  font-variant-numeric: tabular-nums;
-  white-space: nowrap;
-}
 /* A set someone already ruled on — quiet, not celebratory: it means "skip". */
 .dup-claimed {
   font-size: 0.72rem;
diff --git a/frontend/src/views/SnippetListView.vue b/frontend/src/views/SnippetListView.vue
index a538045..62f33d5 100644
--- a/frontend/src/views/SnippetListView.vue
+++ b/frontend/src/views/SnippetListView.vue
@@ -517,6 +517,7 @@ function usageTitle(s: SnippetListItem): string {
   </main>
 </template>
 
+<style src="@/assets/dup-report.css" />
 <style scoped>
 .page-header {
   display: flex;
@@ -757,59 +758,6 @@ function usageTitle(s: SnippetListItem): string {
   color: var(--fs-text-tertiary);
 }
 
-/* Near-duplicate report */
-.dup-panel {
-  margin-bottom: 1.25rem;
-  padding: 0.85rem 1rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: 8px;
-  background: var(--fs-surface-hover);
-}
-
-.dup-empty,
-.dup-head {
-  margin: 0 0 0.5rem;
-  font-size: 0.85rem;
-  color: var(--fs-text-tertiary);
-}
-
-.dup-empty {
-  margin-bottom: 0;
-}
-
-.dup-group {
-  display: flex;
-  align-items: center;
-  gap: 0.75rem;
-  flex-wrap: wrap;
-  padding: 0.5rem 0;
-  border-top: 1px solid var(--fs-border-color);
-}
-
-.dup-members {
-  display: flex;
-  gap: 0.4rem;
-  flex-wrap: wrap;
-  flex: 1 1 20rem;
-  min-width: 0;
-}
-
-.dup-member {
-  font-size: 0.8rem;
-  padding: 0.1rem 0.45rem;
-  border-radius: 4px;
-  background: color-mix(in srgb, var(--fs-text-tertiary) 12%, transparent);
-  /* Long snippet names must not push the row into a horizontal scroll. */
-  overflow-wrap: anywhere;
-}
-
-.dup-score {
-  font-size: 0.75rem;
-  color: var(--fs-text-tertiary);
-  font-variant-numeric: tabular-nums;
-  white-space: nowrap;
-}
-
 .dup-action {
   white-space: nowrap;
 }