Exercise 3: Confirming Astro's Default Escaping — Possible Solution
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THE CHANGE
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// src/layouts/PageLayout.astro (temporarily changed)
<h1>{page.title}</h1>
<div>{page.body}</div>

WITH THE SAME STORED BODY FROM EXERCISE 1
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body: "<p>Regular text with <strong>bold emphasis</strong>.</p>"

CONFIRMATION
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The rendered page now literally displays the text:

  <p>Regular text with <strong>bold emphasis</strong>.</p>

as visible characters on the screen - the angle brackets and tag
names appear as plain text, not as real markup, and nothing renders
bold at all.

WHY THIS WORKS AS AN ANSWER
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It correctly demonstrates that plain {page.body} interpolation
HTML-escapes the string by default, printing the tags as literal
text rather than parsing them - concrete proof that set:html is a
genuine, deliberate opt-out of that default behavior, not simply an
alternative spelling of the same thing.