release: sync main with dev (about editor, journal template, icon cleanup) (#449)

Brings `main` up to `dev` after #448 realigned the two branches.

`main` had #431 (portfolio features) but was missing everything that
landed on `dev` since:

- #443 — journal sample story ships as a template, not a live entry
- #445 — last emojis in the public frontend replaced with SVG icons
- #446 — About page toggle + content editor in the admin (@lancetm714's
work, rebased)
- #448 — the merge of `main` into `dev`, resolving the `Icons.tsx` split
and porting `IconEyeOff` into the shared icon file

After this merge both branches carry the same tree. CI on #448
(type-check + tests) passed on the merged state.

---------

Co-authored-by: ralksta <ralksta@users.noreply.github.com>
Co-authored-by: lancetm714 <108419425+lancetm714@users.noreply.github.com>

app/layout.tsx

@@ -149,9 +149,11 @@ export default async function RootLayout({ children }: { children: React.ReactNo
                   Home
                 </Link>
                 <SubpageNav />
-                <Link href="/about" className="header__nav-link">
-                  About
-                </Link>
+                {config.aboutEnabled && (
+                  <Link href="/about" className="header__nav-link">
+                    About
+                  </Link>
+                )}
                 {config.map && (
                   <Link href="/map" className="header__nav-link">
                     Map