fix: broken HTML — spans inside title/aria-label attributes

- Filtres de chemin: changed to data-i18n-attr
- help close/hide/clear buttons: changed to data-i18n-attr
- aria-label spans: changed to data-i18n-attr
- This fixes the visible HTML tag leakage in the UI

frontend/index.html

@@ -299,7 +299,7 @@
                                     class="search-btn icon-only"
                                     id="search-filter-btn"
                                     type="button"
-                                    title="<span data-i18n="sidebar.filter_path">Filtres de chemin</span> (Alt-F)"
+                                    title="Filtres de chemin (Alt-F)" data-i18n-attr="title:sidebar.filter_path"
                                 >
                                     <i
                                         data-lucide="filter"
@@ -310,7 +310,7 @@
                                     class="search-btn icon-only"
                                     id="search-clear-btn"
                                     type="button"
-                                    title="<span data-i18n="help.clear_search">Effacer</span>"
+                                    title="Effacer" data-i18n-attr="title:help.clear_search"
                                     aria-label="Effacer la recherche"
                                 >
                                     <i
@@ -1004,7 +1004,7 @@
                                             class="qh-toggle"
                                             id="qh-toggle"
                                             title="Masquer"
-                                            aria-label="<span data-i18n="help.hide_help">Masquer l'aide</span>"
+                                            aria-label="Masquer l'aide" data-i18n-attr="aria-label:help.hide_help"
                                         >
                                             &minus;
                                         </button>
@@ -2537,7 +2537,7 @@
                         <button
                             class="editor-btn"
                             id="help-close"
-                            title="<span data-i18n="help.close_help">Fermer l'aide</span>"
+                            title="Fermer l'aide" data-i18n-attr="title:help.close_help"
                             aria-label="Fermer l'aide"
                         >
                             <i