test(confluence): add explicit regression for the exact reported <br> repro

Formalizes an explicit test for the exact <br>-separated string Greptile's
review cited as broken (verified manually not to reproduce, but wasn't
directly asserted in the suite before this).

Author: waleedlatif1

apps/sim/connectors/confluence/confluence.test.ts

@@ -287,4 +287,14 @@ describe('preserveConfluenceCallouts', () => {
       expect(result).toContain('[CALLOUT] [CALLOUT: Inner title] inner body')
     }
   )
+
+  it.concurrent('does not fuse text on either side of a <br> line break', () => {
+    const html =
+      '<div class="confluence-information-macro confluence-information-macro-warning">' +
+      '<div class="confluence-information-macro-body"><p>Do NOT use this form for:<br>GitLab</p></div>' +
+      '</div>'
+    const result = preserveConfluenceCallouts(html)
+    expect(result).not.toContain('for:GitLab')
+    expect(result).toContain('[WARNING] Do NOT use this form for: GitLab')
+  })
 })