Fix terminals on hash room parsing

frontend/src/test/messageList.test.tsx

@@ -169,6 +169,32 @@ describe('MessageList channel sender rendering', () => {
     expect(onChannelReferenceClick).toHaveBeenCalledWith('#mesh-room');
   });
 
+  it('links valid channel references when followed by clause punctuation', async () => {
+    const user = userEvent.setup();
+    const onChannelReferenceClick = vi.fn();
+
+    render(
+      <MessageList
+        messages={[
+          createMessage({
+            text: 'Alice: Check #mesh-room, then #ops-room; then #alpha-room.',
+          }),
+        ]}
+        contacts={[]}
+        loading={false}
+        onChannelReferenceClick={onChannelReferenceClick}
+      />
+    );
+
+    await user.click(screen.getByRole('button', { name: '#mesh-room' }));
+    await user.click(screen.getByRole('button', { name: '#ops-room' }));
+    await user.click(screen.getByRole('button', { name: '#alpha-room' }));
+
+    expect(onChannelReferenceClick).toHaveBeenNthCalledWith(1, '#mesh-room');
+    expect(onChannelReferenceClick).toHaveBeenNthCalledWith(2, '#ops-room');
+    expect(onChannelReferenceClick).toHaveBeenNthCalledWith(3, '#alpha-room');
+  });
+
   it('links valid channel references in direct messages too', async () => {
     const user = userEvent.setup();
     const onChannelReferenceClick = vi.fn();

frontend/src/test/messageParser.test.ts

@@ -122,11 +122,21 @@ describe('linked channel references', () => {
     ]);
   });
 
-  it('ignores invalid or embedded channel-like text', () => {
+  it('finds linked channel references terminated by clause punctuation', () => {
     expect(
-      findLinkedChannelReferences(
-        'skip #Bad #bad--name abc#ops #ops- #opsRoom #ops_room #good-room,'
-      )
-    ).toEqual([]);
+      findLinkedChannelReferences('Join #mesh-room, then #ops2; finally #alpha-room.')
+    ).toEqual([
+      { label: '#mesh-room', start: 5, end: 15 },
+      { label: '#ops2', start: 22, end: 27 },
+      { label: '#alpha-room', start: 37, end: 48 },
+    ]);
+  });
+
+  it('ignores invalid or embedded channel-like text', () => {
+    const references = findLinkedChannelReferences(
+      'skip #Bad #bad--name abc#ops #ops- #opsRoom #ops_room #good-room,'
+    );
+
+    expect(references.map((reference) => reference.label)).toEqual(['#good-room']);
   });
 });

frontend/src/utils/messageParser.ts

@@ -3,7 +3,7 @@
  * Channel messages have format "sender: message".
  */
 const HASHTAG_CHANNEL_NAME_PATTERN = /^[a-z0-9]+(?:-[a-z0-9]+)*$/;
-const HASHTAG_CHANNEL_REFERENCE_PATTERN = /(^|\s)(#[a-z0-9]+(?:-[a-z0-9]+)*)(?=$|\s)/g;
+const HASHTAG_CHANNEL_REFERENCE_PATTERN = /(^|\s)(#[a-z0-9]+(?:-[a-z0-9]+)*)(?=$|[\s.,;:])/g;
 
 export function parseSenderFromText(text: string): { sender: string | null; content: string } {
   const colonIndex = text.indexOf(': ');