diff --git a/assets/l10n/app_en.arb b/assets/l10n/app_en.arb
index 1d529f95f0..2520b6bb81 100644
--- a/assets/l10n/app_en.arb
+++ b/assets/l10n/app_en.arb
@@ -180,6 +180,10 @@
   "@actionSheetOptionMarkTopicAsRead": {
     "description": "Option to mark a specific topic as read in the action sheet."
   },
+  "actionSheetOptionCopyTopicLink": "Copy link to topic",
+  "@actionSheetOptionCopyTopicLink": {
+    "description": "Label for copy topic link button in action sheet."
+  },
   "errorWebAuthOperationalErrorTitle": "Something went wrong",
   "@errorWebAuthOperationalErrorTitle": {
     "description": "Error title when third-party authentication has an operational error (not necessarily caused by invalid credentials)."
@@ -361,6 +365,10 @@
   "@successMessageLinkCopied": {
     "description": "Message when link of a message was copied to the user's system clipboard."
   },
+  "successTopicLinkCopied": "Topic link copied",
+  "@successTopicLinkCopied": {
+    "description": "Message when link of a topic was copied to the user's system clipboard."
+  },
   "successChannelLinkCopied": "Channel link copied",
   "@successChannelLinkCopied": {
     "description": "Message when link of a channel was copied to the user's system clipboard."
diff --git a/lib/generated/l10n/zulip_localizations.dart b/lib/generated/l10n/zulip_localizations.dart
index 907e29d538..f1bc2e1e8f 100644
--- a/lib/generated/l10n/zulip_localizations.dart
+++ b/lib/generated/l10n/zulip_localizations.dart
@@ -401,6 +401,12 @@ abstract class ZulipLocalizations {
   /// **'Mark topic as read'**
   String get actionSheetOptionMarkTopicAsRead;
 
+  /// Label for copy topic link button in action sheet.
+  ///
+  /// In en, this message translates to:
+  /// **'Copy link to topic'**
+  String get actionSheetOptionCopyTopicLink;
+
   /// Error title when third-party authentication has an operational error (not necessarily caused by invalid credentials).
   ///
   /// In en, this message translates to:
@@ -625,6 +631,12 @@ abstract class ZulipLocalizations {
   /// **'Message link copied'**
   String get successMessageLinkCopied;
 
+  /// Message when link of a topic was copied to the user's system clipboard.
+  ///
+  /// In en, this message translates to:
+  /// **'Topic link copied'**
+  String get successTopicLinkCopied;
+
   /// Message when link of a channel was copied to the user's system clipboard.
   ///
   /// In en, this message translates to:
diff --git a/lib/generated/l10n/zulip_localizations_ar.dart b/lib/generated/l10n/zulip_localizations_ar.dart
index 96cafc3cc9..3784045f0b 100644
--- a/lib/generated/l10n/zulip_localizations_ar.dart
+++ b/lib/generated/l10n/zulip_localizations_ar.dart
@@ -151,6 +151,9 @@ class ZulipLocalizationsAr extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Mark topic as read';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Something went wrong';
 
@@ -303,6 +306,9 @@ class ZulipLocalizationsAr extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Message link copied';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_de.dart b/lib/generated/l10n/zulip_localizations_de.dart
index a016576322..16637d166c 100644
--- a/lib/generated/l10n/zulip_localizations_de.dart
+++ b/lib/generated/l10n/zulip_localizations_de.dart
@@ -155,6 +155,9 @@ class ZulipLocalizationsDe extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Thema als gelesen markieren';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Etwas ist schiefgelaufen';
 
@@ -316,6 +319,9 @@ class ZulipLocalizationsDe extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Nachrichtenlink kopiert';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_en.dart b/lib/generated/l10n/zulip_localizations_en.dart
index fa76f8decc..8ab4638c78 100644
--- a/lib/generated/l10n/zulip_localizations_en.dart
+++ b/lib/generated/l10n/zulip_localizations_en.dart
@@ -151,6 +151,9 @@ class ZulipLocalizationsEn extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Mark topic as read';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Something went wrong';
 
@@ -303,6 +306,9 @@ class ZulipLocalizationsEn extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Message link copied';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_fr.dart b/lib/generated/l10n/zulip_localizations_fr.dart
index a0cff72bff..7cb32f40e1 100644
--- a/lib/generated/l10n/zulip_localizations_fr.dart
+++ b/lib/generated/l10n/zulip_localizations_fr.dart
@@ -151,6 +151,9 @@ class ZulipLocalizationsFr extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Mark topic as read';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Something went wrong';
 
@@ -303,6 +306,9 @@ class ZulipLocalizationsFr extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Message link copied';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_it.dart b/lib/generated/l10n/zulip_localizations_it.dart
index b93ddcdb0e..8716612d8b 100644
--- a/lib/generated/l10n/zulip_localizations_it.dart
+++ b/lib/generated/l10n/zulip_localizations_it.dart
@@ -156,6 +156,9 @@ class ZulipLocalizationsIt extends ZulipLocalizations {
   String get actionSheetOptionMarkTopicAsRead =>
       'Segna l\'argomento come letto';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Qualcosa è andato storto';
 
@@ -313,6 +316,9 @@ class ZulipLocalizationsIt extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Collegamento messaggio copiato';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_ja.dart b/lib/generated/l10n/zulip_localizations_ja.dart
index 9e5eba47f8..234cfb22c4 100644
--- a/lib/generated/l10n/zulip_localizations_ja.dart
+++ b/lib/generated/l10n/zulip_localizations_ja.dart
@@ -149,6 +149,9 @@ class ZulipLocalizationsJa extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'トピックを既読にする';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => '問題が発生しました';
 
@@ -300,6 +303,9 @@ class ZulipLocalizationsJa extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Message link copied';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_nb.dart b/lib/generated/l10n/zulip_localizations_nb.dart
index 73b5a00f0e..46771b771f 100644
--- a/lib/generated/l10n/zulip_localizations_nb.dart
+++ b/lib/generated/l10n/zulip_localizations_nb.dart
@@ -151,6 +151,9 @@ class ZulipLocalizationsNb extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Mark topic as read';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Something went wrong';
 
@@ -303,6 +306,9 @@ class ZulipLocalizationsNb extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Message link copied';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_pl.dart b/lib/generated/l10n/zulip_localizations_pl.dart
index 2861c82c8c..7714cd26bc 100644
--- a/lib/generated/l10n/zulip_localizations_pl.dart
+++ b/lib/generated/l10n/zulip_localizations_pl.dart
@@ -158,6 +158,9 @@ class ZulipLocalizationsPl extends ZulipLocalizations {
   String get actionSheetOptionMarkTopicAsRead =>
       'Oznacz wątek jako przeczytany';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Coś poszło nie tak';
 
@@ -311,6 +314,9 @@ class ZulipLocalizationsPl extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Skopiowano odnośnik wiadomości';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_ru.dart b/lib/generated/l10n/zulip_localizations_ru.dart
index 5fdf3c879c..f7e35040a1 100644
--- a/lib/generated/l10n/zulip_localizations_ru.dart
+++ b/lib/generated/l10n/zulip_localizations_ru.dart
@@ -158,6 +158,9 @@ class ZulipLocalizationsRu extends ZulipLocalizations {
   String get actionSheetOptionMarkTopicAsRead =>
       'Отметить тему как прочитанную';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Что-то пошло не так';
 
@@ -312,6 +315,9 @@ class ZulipLocalizationsRu extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Ссылка на сообщение скопирована';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_sk.dart b/lib/generated/l10n/zulip_localizations_sk.dart
index e79d81866f..52f0d3794b 100644
--- a/lib/generated/l10n/zulip_localizations_sk.dart
+++ b/lib/generated/l10n/zulip_localizations_sk.dart
@@ -152,6 +152,9 @@ class ZulipLocalizationsSk extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Mark topic as read';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Niečo sa pokazilo';
 
@@ -303,6 +306,9 @@ class ZulipLocalizationsSk extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Message link copied';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_sl.dart b/lib/generated/l10n/zulip_localizations_sl.dart
index df7ba7377e..91c7a3070a 100644
--- a/lib/generated/l10n/zulip_localizations_sl.dart
+++ b/lib/generated/l10n/zulip_localizations_sl.dart
@@ -155,6 +155,9 @@ class ZulipLocalizationsSl extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Označi temo kot prebrano';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Nekaj je šlo narobe';
 
@@ -323,6 +326,9 @@ class ZulipLocalizationsSl extends ZulipLocalizations {
   String get successMessageLinkCopied =>
       'Povezava do sporočila je bila kopirana';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_uk.dart b/lib/generated/l10n/zulip_localizations_uk.dart
index 169af2fa7e..289ebe6de6 100644
--- a/lib/generated/l10n/zulip_localizations_uk.dart
+++ b/lib/generated/l10n/zulip_localizations_uk.dart
@@ -158,6 +158,9 @@ class ZulipLocalizationsUk extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Позначити тему як прочитану';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Щось пішло не так';
 
@@ -314,6 +317,9 @@ class ZulipLocalizationsUk extends ZulipLocalizations {
   String get successMessageLinkCopied =>
       'Посилання на повідомлення скопійовано';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/generated/l10n/zulip_localizations_zh.dart b/lib/generated/l10n/zulip_localizations_zh.dart
index 4b9bc3759b..5be4fdf1fb 100644
--- a/lib/generated/l10n/zulip_localizations_zh.dart
+++ b/lib/generated/l10n/zulip_localizations_zh.dart
@@ -151,6 +151,9 @@ class ZulipLocalizationsZh extends ZulipLocalizations {
   @override
   String get actionSheetOptionMarkTopicAsRead => 'Mark topic as read';
 
+  @override
+  String get actionSheetOptionCopyTopicLink => 'Copy link to topic';
+
   @override
   String get errorWebAuthOperationalErrorTitle => 'Something went wrong';
 
@@ -303,6 +306,9 @@ class ZulipLocalizationsZh extends ZulipLocalizations {
   @override
   String get successMessageLinkCopied => 'Message link copied';
 
+  @override
+  String get successTopicLinkCopied => 'Topic link copied';
+
   @override
   String get successChannelLinkCopied => 'Channel link copied';
 
diff --git a/lib/widgets/action_sheet.dart b/lib/widgets/action_sheet.dart
index b77c73a55d..11d7bc0fca 100644
--- a/lib/widgets/action_sheet.dart
+++ b/lib/widgets/action_sheet.dart
@@ -389,15 +389,9 @@ void showTopicActionSheet(BuildContext context, {
       pageContext: context));
   }
 
-  if (optionButtons.isEmpty) {
-    // TODO(a11y): This case makes a no-op gesture handler; as a consequence,
-    //   we're presenting some UI (to people who use screen-reader software) as
-    //   though it offers a gesture interaction that it doesn't meaningfully
-    //   offer, which is confusing. The solution here is probably to remove this
-    //   is-empty case by having at least one button that's always present,
-    //   such as "copy link to topic".
-    return;
-  }
+  optionButtons.add(CopyTopicLinkButton(
+    narrow: TopicNarrow(channelId, topic, with_: someMessageIdInTopic),
+    pageContext: context));
 
   _showActionSheet(pageContext, optionButtons: optionButtons);
 }
@@ -618,6 +612,32 @@ class MarkTopicAsReadButton extends ActionSheetMenuItemButton {
   }
 }
 
+class CopyTopicLinkButton extends ActionSheetMenuItemButton {
+  const CopyTopicLinkButton({
+    super.key,
+    required this.narrow,
+    required super.pageContext,
+  });
+
+  final TopicNarrow narrow;
+
+  @override IconData get icon => ZulipIcons.link;
+
+  @override
+  String label(ZulipLocalizations localizations) {
+    return localizations.actionSheetOptionCopyTopicLink;
+  }
+
+  @override void onPressed() async {
+    final localizations = ZulipLocalizations.of(pageContext);
+    final store = PerAccountStoreWidget.of(pageContext);
+
+    PlatformActions.copyWithPopup(context: pageContext,
+      successContent: Text(localizations.successTopicLinkCopied),
+      data: ClipboardData(text: narrowLink(store, narrow).toString()));
+  }
+}
+
 /// Show a sheet of actions you can take on a message in the message list.
 ///
 /// Must have a [MessageListPage] ancestor.
diff --git a/lib/widgets/message_list.dart b/lib/widgets/message_list.dart
index e3b1d69d6e..fa6c8b9229 100644
--- a/lib/widgets/message_list.dart
+++ b/lib/widgets/message_list.dart
@@ -584,7 +584,7 @@ class MessageListAppBarTitle extends StatelessWidget {
               behavior: HitTestBehavior.translucent,
               onLongPress: () {
                 final someMessage = MessageListPage.ancestorOf(context)
-                  .model?.messages.firstOrNull;
+                  .model?.messages.lastOrNull;
                 // If someMessage is null, the topic action sheet won't have a
                 // resolve/unresolve button. That seems OK; in that case we're
                 // either still fetching messages (and the user can reopen the
diff --git a/test/widgets/action_sheet_test.dart b/test/widgets/action_sheet_test.dart
index 28faa69ff6..561c136473 100644
--- a/test/widgets/action_sheet_test.dart
+++ b/test/widgets/action_sheet_test.dart
@@ -493,6 +493,7 @@ void main() {
 
         checkButton('Follow topic');
         checkButton('Mark as resolved');
+        checkButton('Copy link to topic');
       }
 
       testWidgets('show from inbox; message in Unreads but not in MessageStore', (tester) async {
@@ -888,6 +889,53 @@ void main() {
           ..bodyFields['flag'].equals('read');
       });
     });
+
+    group('CopyTopicLinkButton', () {
+      setUp(() async {
+        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
+          SystemChannels.platform,
+          MockClipboard().handleMethodCall,
+        );
+      });
+
+      Future<void> tapCopyTopicLinkButton(WidgetTester tester) async {
+        await tester.ensureVisible(find.byIcon(ZulipIcons.link, skipOffstage: false));
+        await tester.tap(find.byIcon(ZulipIcons.link));
+        await tester.pump(); // [MenuItemButton.onPressed] called in a post-frame callback: flutter/flutter@e4a39fa2e
+      }
+
+      testWidgets('copies topic link to clipboard', (tester) async {
+        final message = eg.streamMessage(stream: someChannel, topic: someTopic);
+        await prepare(channel: someChannel, topic: someTopic,
+          zulipFeatureLevel: eg.recentZulipFeatureLevel);
+        await showFromAppBar(tester, channel: someChannel,
+          topic: TopicName(someTopic), messages: [message]);
+
+        await tapCopyTopicLinkButton(tester);
+        await tester.pump(Duration.zero);
+        final expectedLink = narrowLink(store,
+          TopicNarrow(someChannel.streamId, TopicName(someTopic), with_: message.id));
+        check(expectedLink.toString().contains('/with/')).isTrue();
+        check((await Clipboard.getData('text/plain'))!)
+          .text.equals(expectedLink.toString());
+      });
+
+      testWidgets('FL < 271 -> link doesn\'t contain "with" operator', (tester) async {
+        final message = eg.streamMessage(stream: someChannel, topic: someTopic);
+        await prepare(channel: someChannel, topic: someTopic,
+          zulipFeatureLevel: 270);
+        await showFromAppBar(tester, channel: someChannel,
+          topic: TopicName(someTopic), messages: [message]);
+
+        await tapCopyTopicLinkButton(tester);
+        await tester.pump(Duration.zero);
+        final expectedLink = narrowLink(store,
+          TopicNarrow(someChannel.streamId, TopicName(someTopic)));
+        check(expectedLink.toString().contains('/with/')).isFalse();
+        check((await Clipboard.getData('text/plain'))!)
+          .text.equals(expectedLink.toString());
+      });
+    });
   });
 
   group('message action sheet', () {