fix(marketing): A-2.8a — extract pricing partial + sync bento + OQLF + test calibration

- Extract 3 pricing tiers to templates/marketing/_partials/_pricing_tiers.html
  Single source of truth — landing.html and tarifs.html now {% include %} it.
  Prevents price drift (LPC art. 219 risk).
- Sync bento card #2 description across landing + fonctionnalites
  (was diverged: 'embeddings' vs 'embeddings vocaux'). Add maintenance
  reminder comments in both files.
- Fix OQLF NBSP on '~2 semaines' matrix cells in /tarifs deep-dive table.
- Fix mixed UTF-8/entity 'québécois' -> 'québécois' in tech
  specs (consistent with rest of file).
- Calibrate H2 size on /tarifs FAQ to match landing (clamp 2.75rem cap).
- Repair 2 pre-existing test bugs from earlier A-2.x commits:
  * 'violent la Loi 25' -> accept both NBSP and plain forms (commit 7c6c6fd
    added the NBSP after the test was written)
  * 'résilie' -> 'résilie' (Jinja outputs raw UTF-8, not entities)
- Update src/marketing/routes.py module docstring to reflect 2/4 done.

templates/marketing/tarifs.html

@@ -22,34 +22,7 @@
 <section class="bg-brand-bg py-20" aria-labelledby="forfaits-title">
   <div class="max-w-[1200px] mx-auto px-6">
     <h2 id="forfaits-title" class="sr-only">Trois forfaits DictIA</h2>
-    {% from 'macros/pricing_card.html' import pricing_card %}
-    <div class="grid md:grid-cols-3 gap-6 max-w-5xl mx-auto items-stretch">
-      {{ pricing_card(
-        'dictia-8',
-        'DictIA 8',
-        '3&nbsp;450&nbsp;$',
-        '173&nbsp;$',
-        'PME · RH · Manufacturiers',
-        ['GPU 8&nbsp;Go RTX', 'Volume illimité', 'WhisperX FR-CA', 'Diarisation 8 locuteurs', 'Support inclus']
-      ) }}
-      {{ pricing_card(
-        'dictia-16',
-        'DictIA 16',
-        '5&nbsp;750&nbsp;$',
-        '201&nbsp;$',
-        'Cabinets juridiques · CPA · Finance',
-        ['GPU 16&nbsp;Go RTX', 'Mistral 7B local', 'Q&amp;R sur enregistrement', 'Tout DictIA 8', 'Support prioritaire'],
-        recommended=True
-      ) }}
-      {{ pricing_card(
-        'dictia-cloud',
-        'DictIA Cloud',
-        '0&nbsp;$',
-        '369&nbsp;$',
-        'Organismes · Municipalités · Multi-sites',
-        ['Hébergé OVH Beauharnois (Québec)', 'Opérationnel sous 48&nbsp;h', 'Aucun matériel à gérer', 'SLA visé 99,9&nbsp;%', 'Conforme Loi&nbsp;25']
-      ) }}
-    </div>
+    {% include 'marketing/_partials/_pricing_tiers.html' %}
   </div>
 </section>
 
@@ -83,7 +56,7 @@
             {'name': 'Diarisation', 'd8': '8 locuteurs', 'd16': '8 locuteurs', 'cloud': '8 locuteurs'},
             {'name': 'Résumés Mistral 7B local', 'd8': '—', 'd16': '✓', 'cloud': '✓ (mutualisé)'},
             {'name': 'Q&amp;R sur enregistrement', 'd8': '—', 'd16': '✓', 'cloud': '✓'},
-            {'name': 'Délai de mise en service', 'd8': '~2 semaines', 'd16': '~2 semaines', 'cloud': '48&nbsp;h'}
+            {'name': 'Délai de mise en service', 'd8': '~2&nbsp;semaines', 'd16': '~2&nbsp;semaines', 'cloud': '48&nbsp;h'}
           ] %}
           <tr>
             <th scope="row" class="text-left p-4 font-semibold text-brand-navy/80">{{ row.name | safe }}</th>
@@ -107,7 +80,7 @@
   <div class="max-w-[820px] mx-auto px-6">
     <div class="text-center mb-10">
       <p class="eyebrow grad-text mb-4">QUESTIONS DE TARIFICATION</p>
-      <h2 id="tarifs-faq-title" class="text-[clamp(2rem,3vw,2.5rem)] font-black mb-4 text-brand-navy">Vos questions sur les tarifs.</h2>
+      <h2 id="tarifs-faq-title" class="text-[clamp(2rem,3vw,2.75rem)] font-black mb-4 text-brand-navy">Vos questions sur les tarifs.</h2>
     </div>
 
     <div class="divide-y divide-brand-border border-y border-brand-border">