fix: update portfolio branding to "Killian' DAL-CIN" across all documentation and components

- Corrected the name in various files including CLAUDE.md, README.md, and configuration files to reflect the updated branding.
- Ensured consistency in the use of the new name throughout the project, enhancing brand identity.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/phases/02-ssr-shell/02-02-PLAN.md

@@ -103,7 +103,7 @@ Create `app/components/layout/AppHeader.vue` as a single-file component containi
 
 **Left — Logo:**
 - `<NuxtLink to="localePath('/')" :aria-label="t('a11y.logoLabel')">`
-- Contains `<NuxtImg src="/images/logo.webp" alt="Killian Dalcin" width="40" height="40" loading="eager" />` + `<span class="text-lg font-semibold">Killian</span>`
+- Contains `<NuxtImg src="/images/logo.webp" alt="Killian' DAL-CIN" width="40" height="40" loading="eager" />` + `<span class="text-lg font-semibold">Killian</span>`
 
 **Center-Right — Desktop nav (hidden md:flex):**
 - Use `<nav>` with `<NuxtLink>` for each route: home(/), projects(/projects), about(/about), contact(/contact), fiverr(/fiverr), formation(/formation)
@@ -226,7 +226,7 @@ Template:
 - Icon: `<UIcon :name="link.icon" class="w-5 h-5 text-gray-500 dark:text-gray-400 hover:text-primary-500 transition-colors duration-150" />`
 - Focus ring on each `<a>`: `focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary focus-visible:ring-offset-2`
 
-Note: a11y.github key text says "GitHub de Killian Dalcin" but links to Gitea — the executor should update the a11y key in fr.json/en.json to say "Gitea" instead of "GitHub" if not already correct. Check and fix if needed.
+Note: a11y.github key text says "GitHub de Killian' DAL-CIN" but links to Gitea — the executor should update the a11y key in fr.json/en.json to say "Gitea" instead of "GitHub" if not already correct. Check and fix if needed.
 
 2. Create `app/layouts/default.vue` (per D-15):
 ```vue