feat: add max_articles_per_source setting to frontend

Add max_articles_per_source field to UserSettings interface and DEFAULT_SETTINGS,
expose it as a number input on the Settings page, and add the French i18n label.

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

frontend/src/i18n/fr.ts

@@ -123,6 +123,7 @@ const fr = {
     "Le sujet principal pour la recherche d'actualites (ex: Intelligence Artificielle, Cybersecurite, etc.).",
   'settings.maxAgeDays': 'Anciennete maximum (jours)',
   'settings.maxItems': 'Actualites max par categorie',
+  'settings.maxArticlesPerSource': 'Articles max par source',
   'settings.searchBehavior': "Comportement de l'agent de recherche",
   'settings.searchBehaviorHelp':
     "Personnalisez les instructions donnees a l'IA concernant sa methode de recherche.",

frontend/src/pages/Settings.tsx

@@ -400,6 +400,32 @@ const Settings: Component = () => {
                 />
               </div>
             </div>
+
+            <div>
+              <label
+                for="maxArticlesPerSource"
+                class="block text-sm font-medium text-gray-700"
+              >
+                {t('settings.maxArticlesPerSource')}
+              </label>
+              <div class="mt-1">
+                <input
+                  type="number"
+                  id="maxArticlesPerSource"
+                  min="1"
+                  max="10"
+                  class="shadow-sm focus:ring-indigo-500 focus:border-indigo-500 block w-full sm:text-sm border-gray-300 rounded-md py-2 px-3 border"
+                  value={settings().max_articles_per_source}
+                  onInput={(e) =>
+                    setSettings((prev) => ({
+                      ...prev,
+                      max_articles_per_source:
+                        parseInt(e.currentTarget.value) || 3,
+                    }))
+                  }
+                />
+              </div>
+            </div>
           </div>
 
           {/* Search agent behavior */}

frontend/src/types.ts

@@ -43,6 +43,7 @@ export interface UserSettings {
   theme: string;
   max_age_days: number;
   max_items_per_category: number;
+  max_articles_per_source: number;
   search_agent_behavior: string;
   ai_model: string;
   ai_model_writing: string;
@@ -56,6 +57,7 @@ export const DEFAULT_SETTINGS: UserSettings = {
   theme: 'Intelligence Artificielle',
   max_age_days: 7,
   max_items_per_category: 4,
+  max_articles_per_source: 3,
   search_agent_behavior:
     "Tu peux egalement utiliser d'autres sources pertinentes trouvees via la recherche Google.",
   ai_model: '',