AI message: do not render html when it's in a code block

[jurgenwerk]

The problem happens when the bot is streaming code:

Here is how it looks after the change in this PR:

It turns out the browser will render HTML tags, such as <h1>, or <template>, even when they are placed inside <pre><code> ... </code></pre>. So we need to escape these tags in order to show the actual code (and not render it as html).

[github-actions]

Host Test Results

    1 files  ±0      1 suites  ±0   23m 45s ⏱️ +7s
776 tests +1  774 ✔️ +1  2 💤 ±0  0 ❌ ±0 
781 runs  +1  779 ✔️ +1  2 💤 ±0  0 ❌ ±0 

Results for commit ab8a4b7. ± Comparison against base commit 88e77dd.

♻️ This comment has been updated with latest results.

[jurgenwerk]

Just FYI, once the code is finished streaming, it changes into monaco editors: