feat: add global Komga search autocomplete in header

src/i18n/messages/en/common.json

@@ -454,6 +454,18 @@
     "endOfSeriesMessage": "You have finished all the books in this series!",
     "backToSeries": "Back to series"
   },
+  "header": {
+    "toggleSidebar": "Toggle sidebar",
+    "toggleTheme": "Toggle theme",
+    "search": {
+      "placeholder": "Search series and books...",
+      "empty": "No results",
+      "series": "Series",
+      "books": "Books",
+      "openSeries": "Open series {{title}}",
+      "openBook": "Open book {{title}}"
+    }
+  },
   "navigation": {
     "scrollLeft": "Scroll left",
     "scrollRight": "Scroll right",

src/i18n/messages/fr/common.json

@@ -454,7 +454,15 @@
   },
   "header": {
     "toggleSidebar": "Afficher/masquer le menu latéral",
-    "toggleTheme": "Changer le thème"
+    "toggleTheme": "Changer le thème",
+    "search": {
+      "placeholder": "Rechercher séries et tomes...",
+      "empty": "Aucun résultat",
+      "series": "Séries",
+      "books": "Tomes",
+      "openSeries": "Ouvrir la série {{title}}",
+      "openBook": "Ouvrir le tome {{title}}"
+    }
   },
   "navigation": {
     "scrollLeft": "Défiler vers la gauche",