fix: Files section title + ObsiGate indexes paragraph

- 📄 Fichiers → 📄 Files
- ObsiGate indexe et affiche → ObsiGate indexes and displays

frontend/locales/en.json

@@ -801,7 +801,7 @@
   "help.5f87ea79": "Tag cloud",
   "help.2c03a7ba": "Inline vs frontmatter tags",
   "help.63f024d4": "Template tag filtering",
-  "help.c017944b": "📄 Fichiers",
+  "help.c017944b": "📄 Files",
   "help.cf8615b1": "Visualization",
   "help.9c7a0a8d": "🗺️ Graph View",
   "help.b6619ac9": "Opening",
@@ -964,5 +964,6 @@
   "help.desc_adv_syntax": ": Python, JS, HTML, CSS, Java, C++, Rust, Go and many more",
   "help.desc_find_in_page": ": Ctrl+F to search in the file (case, regex, whole word)",
   "help.desc_check_btn": ": Manual save",
-  "help.desc_trash_btn": ": Delete file"
+  "help.desc_trash_btn": ": Delete file",
+  "help.indexes": "ObsiGate indexes and displays:"
 }