refactor(ui): V3 fully square buttons + inputs (rounded-none, brutalist/Swiss aesthetic)

V3 finalizes the radii pass to a fully brutalist/Swiss visual language:

- Buttons (CTAs, submit, secondary, ghost, OAuth provider tiles): rounded-none (0px)
- Form inputs (text/email/password/select/textarea/code-entry): rounded-none (0px)
- Checkboxes: rounded-none (0px) — was rounded-sm
- Small icon tiles (w-10 h-10 / w-12 h-12 grad-bg squares): rounded-none (0px)
- Inline code blocks (totp recovery <pre>, secret <code>): rounded-none (0px)
- Cards (pricing, bento, content panels, modals, prev/next nav): rounded (4px) — was rounded-lg
- Alert / flash boxes: rounded (4px) — was rounded-lg
- Pills, badges, status chips, ordres pros avatars, decorative cosmic orbs: rounded-full preserved
- Legal _layout.html inline <style> blockquote/pre/code/draft-callout: border-radius 0 — was 4px

Updated tests/test_marketing_landing_template.py assertions:
- bento icon assertion: "grad-bg rounded " -> "grad-bg rounded-none "
- pricing recommended frame: "rounded-lg" -> "rounded" (with strict trailing-char match to avoid rounded-none false positive)

Verification: 18/18 legal tests pass, 58/58 marketing landing tests pass, 5/5 root redirect tests pass. Two pre-existing failures in test_marketing_secondary_pages (SOC 2 hedge text + gitea.innova-ai.ca URL) are unrelated to this radii pass.

templates/marketing/contact.html

@@ -25,8 +25,8 @@
     <div class="grid md:grid-cols-3 gap-6">
 
       {# Email card #}
-      <article class="bg-white p-8 rounded-lg border border-brand-border flex flex-col">
-        <div class="w-12 h-12 grad-bg rounded mb-4 flex items-center justify-center text-2xl shadow-cta" aria-hidden="true">✉️</div>
+      <article class="bg-white p-8 rounded border border-brand-border flex flex-col">
+        <div class="w-12 h-12 grad-bg rounded-none mb-4 flex items-center justify-center text-2xl shadow-cta" aria-hidden="true">✉️</div>
         <h3 class="text-lg font-bold mb-2 text-brand-navy">Courriel</h3>
         <p class="text-sm text-brand-navy/80 mb-4 leading-relaxed flex-grow">
           Privilégiez le courriel pour&nbsp;: pré-inscription, devis, démonstration, dossier de conformité, partenariats.
@@ -35,8 +35,8 @@
       </article>
 
       {# Phone card #}
-      <article class="bg-white p-8 rounded-lg border border-brand-border flex flex-col">
-        <div class="w-12 h-12 grad-bg rounded mb-4 flex items-center justify-center text-2xl shadow-cta" aria-hidden="true">☎️</div>
+      <article class="bg-white p-8 rounded border border-brand-border flex flex-col">
+        <div class="w-12 h-12 grad-bg rounded-none mb-4 flex items-center justify-center text-2xl shadow-cta" aria-hidden="true">☎️</div>
         <h3 class="text-lg font-bold mb-2 text-brand-navy">Téléphone</h3>
         <p class="text-sm text-brand-navy/80 mb-4 leading-relaxed flex-grow">
           Du lundi au vendredi, 9&nbsp;h à 17&nbsp;h (heure de l'Est). Laissez un message en dehors de ces heures.
@@ -45,8 +45,8 @@
       </article>
 
       {# Mailing address card #}
-      <article class="bg-white p-8 rounded-lg border border-brand-border flex flex-col">
-        <div class="w-12 h-12 grad-bg rounded mb-4 flex items-center justify-center text-2xl shadow-cta" aria-hidden="true">📬</div>
+      <article class="bg-white p-8 rounded border border-brand-border flex flex-col">
+        <div class="w-12 h-12 grad-bg rounded-none mb-4 flex items-center justify-center text-2xl shadow-cta" aria-hidden="true">📬</div>
         <h3 class="text-lg font-bold mb-2 text-brand-navy">Bureau</h3>
         <p class="text-sm text-brand-navy/80 mb-4 leading-relaxed flex-grow">
           Sur rendez-vous uniquement. Visites en personne pour démonstrations on-premise et déploiements DictIA 16 corporatifs.
@@ -83,7 +83,7 @@
         {'label': 'Question média / presse', 'subject': 'Question%20m%C3%A9dia', 'icon': '📰'}
       ] %}
       <a href="mailto:info@dictia.ca?subject={{ shortcut.subject }}"
-         class="flex items-center gap-3 bg-brand-bg p-4 rounded-lg border border-brand-border hover:bg-white hover:border-brand-b1/30 transition-colors focus-visible:outline-2 focus-visible:outline-brand-b1 focus-visible:outline-offset-2">
+         class="flex items-center gap-3 bg-brand-bg p-4 rounded border border-brand-border hover:bg-white hover:border-brand-b1/30 transition-colors focus-visible:outline-2 focus-visible:outline-brand-b1 focus-visible:outline-offset-2">
         <span class="text-2xl flex-shrink-0" aria-hidden="true">{{ shortcut.icon }}</span>
         <span class="text-sm font-semibold text-brand-navy">{{ shortcut.label | safe }}</span>
       </a>