test(session-ui): update chunk split test for label heuristic

The label heuristic (<40 chars ending ':') now keeps 'Steps:' glued to
the list that follows it. Update the expected output to reflect the new
intentional behavior (issue #628).

Author: jeonghun-jj-lee

packages/session-ui/src/components/message-part.test.ts

@@ -59,7 +59,10 @@ describe("splitSettledChunks", () => {
   test("splits before a list's first item, never between its items", () => {
     const text = "Steps:\n\n1. one\n\n2. two\n\n> quoted\n\nNext paragraph beg"
     const { chunks, tail } = splitSettledChunks(text)
-    expect(chunks).toEqual(["Steps:\n\n", "1. one\n\n2. two\n\n> quoted\n\n"])
+    // "Steps:" is a short label (<40 chars ending `:`) — stays glued to the
+    // list that follows (issue #628 label heuristic). The list items and quote
+    // then stay together via the CONTINUATION guard.
+    expect(chunks).toEqual(["Steps:\n\n1. one\n\n2. two\n\n> quoted\n\n"])
     expect(tail).toBe("Next paragraph beg")
   })