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/fonctionnalites.html

@@ -25,7 +25,7 @@
     {# NOTE: bento card content is duplicated between landing.html and fonctionnalites.html.
        When editing, sync both files. Future refactor: extract to _partials/_bento_features.html. #}
     {% from 'macros/bento.html' import bento_card %}
-    <div class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 gap-[1.5px] bg-brand-border rounded-lg overflow-hidden">
+    <div class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 gap-[1.5px] bg-brand-border rounded overflow-hidden">
       {{ bento_card('01', 'Transcription WhisperX', 'Large-v3 fine-tuné FR-CA. Précision 95&nbsp;%+ sur réunions, dictées, audiences (méthodologie disponible sur demande).', '🎙️') }}
       {{ bento_card('02', 'Diarisation 8 locuteurs', 'pyannote sépare automatiquement les intervenants. Identification par embeddings vocaux.', '👥') }}
       {{ bento_card('03', 'Résumés Mistral 7B', 'IA locale génère résumés, points d\'action et procès-verbaux. Aucune connexion cloud.', '📝') }}
@@ -55,7 +55,7 @@
         {'ext': 'JSON', 'use': 'Pipeline développeur'},
         {'ext': 'MD',   'use': 'Notion, Obsidian, GitHub'}
       ] %}
-      <div class="bg-white p-4 rounded-lg border border-brand-border text-center">
+      <div class="bg-white p-4 rounded border border-brand-border text-center">
         <p class="text-base font-black text-brand-navy">{{ fmt.ext }}</p>
         <p class="text-xs text-brand-navy/70 mt-1">{{ fmt.use | safe }}</p>
       </div>
@@ -87,7 +87,7 @@
         {'name': 'Make (Integromat)', 'desc': 'Scénarios visuels'},
         {'name': 'n8n', 'desc': 'Open source self-host'}
       ] %}
-      <div class="bg-brand-bg p-5 rounded-lg border border-brand-border text-center">
+      <div class="bg-brand-bg p-5 rounded border border-brand-border text-center">
         <p class="text-base font-bold text-brand-navy">{{ integ.name | safe }}</p>
         <p class="text-xs text-brand-navy/70 mt-1">{{ integ.desc | safe }}</p>
       </div>
@@ -117,7 +117,7 @@
         {'title': 'Audio supportés', 'desc': 'WAV, MP3, M4A, FLAC, OGG, WebM — jusqu\'à 8&nbsp;h par fichier. Conversion ffmpeg automatique.'},
         {'title': 'Langues', 'desc': 'Optimisé français québécois. Aussi&nbsp;: français de France, anglais (canadien et US), espagnol, allemand, mandarin, russe.'}
       ] %}
-      <article class="bg-white/[0.05] backdrop-blur-sm p-6 rounded-lg border border-white/[0.08]">
+      <article class="bg-white/[0.05] backdrop-blur-sm p-6 rounded border border-white/[0.08]">
         <h3 class="text-lg font-bold mb-2 text-white">{{ spec.title | safe }}</h3>
         <p class="text-sm text-white/80 leading-relaxed">{{ spec.desc | safe }}</p>
       </article>