feat(assistant): #91 etapes enrichies (sous-sections Reflechon/Sources, chevrons, indicateur anime, suppression barre de chargement)

frontend/locales/en.json

@@ -1784,6 +1784,9 @@
   "ai.steps_count_plural": "{count} steps",
   "ai.activity_thinking": "Thinking…",
   "ai.step.thought": "Thought: {value}",
+  "ai.thought_label": "Thought",
+  "ai.sources_label": "Sources ({count})",
+  "ai.steps_running": "running",
   "ai.step.backlinks": "Analyzed backlinks",
   "ai.step.backup_diff": "Compared backup: {value}",
   "ai.step.backup_restore": "Restored backup: {value}",

frontend/locales/fr.json

@@ -1784,6 +1784,9 @@
   "ai.steps_count_plural": "{count} étapes",
   "ai.activity_thinking": "Réflexion…",
   "ai.step.thought": "Réflexion : {value}",
+  "ai.thought_label": "Réflexion",
+  "ai.sources_label": "Sources ({count})",
+  "ai.steps_running": "exécution en cours",
   "ai.step.backlinks": "Backlinks analysés",
   "ai.step.backup_diff": "Comparaison de sauvegarde : {value}",
   "ai.step.backup_restore": "Sauvegarde restaurée : {value}",