zjncs opened a new pull request, #5710:
URL: https://github.com/apache/rocketmq-dashboard/pull/5710
### What
`UserBubble` — the operator's own message in the transcript — had no test.
This adds `UserBubble.test.tsx` with 6 tests pinning the two contracts its own
documentation calls deliberate.
### Why
Both behaviors are silent-failure traps:
1. **plain text on purpose** — what was sent is what the run was admitted
with; re-interpreting a prompt as Markdown would let a prompt containing `#` or
`*` render as something the user never typed.
2. **the UTC timestamp helper** — `rmq_ai_event.gmt_create` is written from
`Clock.systemUTC()` as a `LocalDateTime` with **no offset**; parsing it as a
plain local `Date` would silently shift every history entry by the viewer's UTC
offset.
### What is pinned
- the prompt renders as plain text: `#`, `**`, and `-` stay literal, with no
`h1`/`strong`/`ul` in the DOM;
- the creation time goes through `formatUtcDateTime`, the same helper every
other timestamp in Studio uses;
- no `createdAt`, no timestamp line;
- the avatar shows the logged-in operator's **uppercase** initial with the
username as tooltip, falls back to `U` with no title when nobody is logged in,
and uppercases a lowercase username.
### Verification
- New tests on unmodified code: **6/6 green** (`npx vitest run`).
- Discriminating mutations on `UserBubble`, vitest result verified red each
time:
1. the prompt re-interpreted as a heading when it starts with `#` — red;
2. the timestamp parsed as a local `Date` instead of the shared UTC helper
— red;
3. the avatar initial hardcoded to `U` — red.
- Restored: 6/6 green. Test-only change; no product code touched.
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