AI Implementation feature(849): Landing Page and Login/Register Modal 1.00 (#12)

docs/guides/landing-page.md

@@ -3,7 +3,7 @@ type: guide
 title: Landing Page
 description: How the public landing page renders, how the login + registration modal is opened, and what each form does.
 tags: [guide, landing, login, register, ui]
-timestamp: 2026-07-21T18:28:00Z
+timestamp: 2026-07-21T18:45:54Z
 ---
 
 # What you see
@@ -20,9 +20,13 @@ On a fresh visit the page shows, in order:
 2. **Page title** — `<h1 data-testid="landing-title">` rendered from
    `BootstrapService.payload().pageTitle` (defaults to `HIPCTF`).
 3. **Welcome card** — `<article data-testid="landing-welcome">` whose
-   `innerHTML` is the sanitized render of
+   `innerHTML` is bound to the computed signal `welcomeHtml()`, i.e. the
+   sanitized HTML render of
    `BootstrapService.payload().welcomeMarkdown` (via
-   `MarkdownService.render` → `marked` + `DOMPurify`).
+   `MarkdownService.render` → `renderMarkdownToHtml` → `marked` +
+   `DOMPurify`). The binding **must** invoke the signal (`welcomeHtml()`),
+   not the signal object — see [Key Files Index](/architecture/key-files.md)
+   for the `landing.component.html` entry that pins this.
 4. **Login button** — `<button data-testid="landing-open-login">`.
 5. **Blog list** — `<section data-testid="landing-blog">` listing every
    row returned by `GET /api/v1/blog/posts` (only `status='published'`