Studio: reorder sidebar, rename Hub to Models (#7327)

* Studio: put Hub above Projects in the sidebar

Swap the two nav rows so Hub sits directly under New Chat, ahead of
Projects. Order only, no behavior change.

* Studio: rename Hub to Models, lowercase New chat

Rename the Hub nav row and its page heading to Models (localized in all
locales). Use sentence case 'New chat' in the English label.

* Studio: fix dataset title and stale Hub tab hints after rename

Show 'Datasets' as the catalog heading in dataset mode, not 'Models'.
Update the download-conflict toasts to point at the Models tab.

studio/frontend/src/components/app-sidebar.tsx

@@ -1357,6 +1357,18 @@ export function AppSidebar() {
         <SidebarGroup className="group-data-[collapsible=icon]:px-0 pl-1.5 pr-2 py-0 shrink-0">
           <SidebarGroupContent>
             <SidebarMenu>
+              <NavItem
+                icon={DashboardCircleIcon}
+                label={t("shell.navigation.hub")}
+                active={pathname === "/hub" || pathname.startsWith("/hub/")}
+                onClick={() => {
+                  navigate({ to: "/hub" });
+                  closeMobileIfOpen();
+                }}
+                onIntent={() => {
+                  preloadSilently(router.preloadRoute({ to: "/hub" }));
+                }}
+              />
               <NavItem
                 icon={Folder01Icon}
                 label="Projects"
@@ -1392,18 +1404,6 @@ export function AppSidebar() {
                   </span>
                 </button>
               </NavItem>
-              <NavItem
-                icon={DashboardCircleIcon}
-                label={t("shell.navigation.hub")}
-                active={pathname === "/hub" || pathname.startsWith("/hub/")}
-                onClick={() => {
-                  navigate({ to: "/hub" });
-                  closeMobileIfOpen();
-                }}
-                onIntent={() => {
-                  preloadSilently(router.preloadRoute({ to: "/hub" }));
-                }}
-              />
               {/* Train has a labelled section when expanded; plain icon here only when collapsed. */}
               <NavItem
                 icon={TestTubeOutlineIcon}

studio/frontend/src/features/chat/chat-page.tsx

@@ -2268,9 +2268,9 @@ export function ChatPage({
                 "It'll be ready to load once the current model finishes.",
             });
           } else if (outcome === "conflict") {
-            toast.info("Resume this download from the Hub", {
+            toast.info("Resume this download from Models", {
               description:
-                "An earlier partial download used a different transport. Open the Hub tab to resume or restart it.",
+                "An earlier partial download used a different transport. Open the Models tab to resume or restart it.",
             });
           } else if (outcome === "busy") {
             toast.info("Download already in progress", {
@@ -2389,9 +2389,9 @@ export function ChatPage({
         // the conflict just recorded by requestStart (which the toast points the
         // user to); resolving it from the Hub completes the download and this
         // surface's onComplete auto-loads, mirroring the "started" branch.
-        toast.info("Resume this download from the Hub", {
+        toast.info("Resume this download from Models", {
           description:
-            "An earlier partial download used a different transport. Open the Hub tab to resume or restart it.",
+            "An earlier partial download used a different transport. Open the Models tab to resume or restart it.",
         });
         return;
       }

studio/frontend/src/features/hub/catalog/models-header.tsx

@@ -64,7 +64,7 @@ export function ModelsHeader({
   return (
     <header className="font-heading flex flex-col gap-3 sm:flex-row sm:flex-wrap sm:items-center sm:justify-between">
       <PageHeading
-        title="Hub"
+        title={isDataset ? "Datasets" : "Models"}
         onTitleClick={onTitleClick}
         subtitle={
           isDataset

studio/frontend/src/i18n/locales/ar.ts

@@ -39,7 +39,7 @@ export const ar = {
       returnToChat: "العودة إلى المحادثة",
       compare: "مقارنة",
       search: "بحث",
-      hub: "Hub",
+      hub: "النماذج",
       train: "تدريب",
       recipes: "الوصفات",
       export: "تصدير",

studio/frontend/src/i18n/locales/de.ts

@@ -39,7 +39,7 @@ export const de = {
       returnToChat: "Zurück zum Chat",
       compare: "Vergleichen",
       search: "Suchen",
-      hub: "Hub",
+      hub: "Modelle",
       train: "Trainieren",
       recipes: "Rezepte",
       export: "Exportieren",

studio/frontend/src/i18n/locales/en.ts

@@ -32,11 +32,11 @@ export const en = {
       runOptions: "Run options",
     },
     navigation: {
-      newChat: "New Chat",
+      newChat: "New chat",
       returnToChat: "Return to Chat",
       compare: "Compare",
       search: "Search",
-      hub: "Hub",
+      hub: "Models",
       train: "Train",
       recipes: "Recipes",
       export: "Export",

studio/frontend/src/i18n/locales/es.ts

@@ -39,7 +39,7 @@ export const es = {
       returnToChat: "Volver al chat",
       compare: "Comparar",
       search: "Buscar",
-      hub: "Hub",
+      hub: "Modelos",
       train: "Entrenar",
       recipes: "Recetas",
       export: "Exportar",

studio/frontend/src/i18n/locales/fr.ts

@@ -39,7 +39,7 @@ export const fr = {
       returnToChat: "Retour à la discussion",
       compare: "Comparer",
       search: "Rechercher",
-      hub: "Hub",
+      hub: "Modèles",
       train: "Entraîner",
       recipes: "Recettes",
       export: "Exporter",

studio/frontend/src/i18n/locales/hi.ts

@@ -39,7 +39,7 @@ export const hi = {
       returnToChat: "चैट पर लौटें",
       compare: "तुलना करें",
       search: "खोजें",
-      hub: "Hub",
+      hub: "मॉडल",
       train: "ट्रेनिंग",
       recipes: "रेसिपी",
       export: "एक्सपोर्ट",

studio/frontend/src/i18n/locales/ja.ts

@@ -40,7 +40,7 @@ export const ja = {
       returnToChat: "チャットに戻る",
       compare: "比較",
       search: "検索",
-      hub: "ハブ",
+      hub: "モデル",
       train: "トレーニング",
       recipes: "レシピ",
       export: "エクスポート",

studio/frontend/src/i18n/locales/ko.ts

@@ -39,7 +39,7 @@ export const ko = {
       returnToChat: "채팅으로 돌아가기",
       compare: "비교",
       search: "검색",
-      hub: "Hub",
+      hub: "모델",
       train: "학습",
       recipes: "레시피",
       export: "내보내기",

studio/frontend/src/i18n/locales/pt-br.ts

@@ -39,7 +39,7 @@ export const ptBR = {
       returnToChat: "Retornar ao Chat",
       compare: "Comparar",
       search: "Buscar",
-      hub: "Hub",
+      hub: "Modelos",
       train: "Treinar",
       recipes: "Receitas",
       export: "Exportar",

studio/frontend/src/i18n/locales/ru.ts

@@ -39,7 +39,7 @@ export const ru = {
       returnToChat: "Вернуться к чату",
       compare: "Сравнить",
       search: "Поиск",
-      hub: "Hub",
+      hub: "Модели",
       train: "Обучение",
       recipes: "Рецепты",
       export: "Экспорт",

studio/frontend/src/i18n/locales/zh-CN.ts

@@ -39,7 +39,7 @@ export const zhCN = {
       returnToChat: "返回聊天",
       compare: "对比",
       search: "搜索",
-      hub: "Hub",
+      hub: "模型",
       train: "训练",
       recipes: "配方",
       export: "导出",