feat: add article_history_days setting to frontend

Add article_history_days (defaulting to 90) to UserSettings interface and DEFAULT_SETTINGS, French translation, and Settings page number input.

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

frontend/src/i18n/fr.ts

@@ -154,6 +154,7 @@ const fr = {
   'settings.advancedExtraction': 'Extraction avancee',
   'settings.useLlmForSourceLinks': "Utiliser l'IA pour extraire les liens",
   'settings.useLlmForArticleExtraction': "Utiliser l'IA pour extraire le contenu",
+  'settings.articleHistoryDays': 'Historique des articles (jours)',
   'settings.export': 'Exporter',
   'settings.import': 'Importer',
   'settings.exportIncludeKeys': 'Inclure les cles API',

frontend/src/pages/Settings.tsx

@@ -452,6 +452,32 @@ const Settings: Component = () => {
                 />
               </div>
             </div>
+
+            <div>
+              <label
+                for="articleHistoryDays"
+                class="block text-sm font-medium text-gray-700"
+              >
+                {t('settings.articleHistoryDays')}
+              </label>
+              <div class="mt-1">
+                <input
+                  type="number"
+                  id="articleHistoryDays"
+                  min="0"
+                  max="365"
+                  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().article_history_days}
+                  onInput={(e) =>
+                    setSettings((prev) => ({
+                      ...prev,
+                      article_history_days:
+                        parseInt(e.currentTarget.value) || 90,
+                    }))
+                  }
+                />
+              </div>
+            </div>
           </div>
 
           {/* Advanced extraction */}

frontend/src/types.ts

@@ -47,6 +47,7 @@ export interface UserSettings {
   source_diversity_window: number;
   use_llm_for_source_links: boolean;
   use_llm_for_article_extraction: boolean;
+  article_history_days: number;
   search_agent_behavior: string;
   ai_model: string;
   ai_model_writing: string;
@@ -64,6 +65,7 @@ export const DEFAULT_SETTINGS: UserSettings = {
   source_diversity_window: 3,
   use_llm_for_source_links: false,
   use_llm_for_article_extraction: false,
+  article_history_days: 90,
   search_agent_behavior:
     "Tu peux egalement utiliser d'autres sources pertinentes trouvees via la recherche Google.",
   ai_model: '',