fix(dashboard): localize plugin names in sidebar (#10576)

* fix(dashboard): localize plugin names in sidebar

* test: simplify plugin sidebar i18n regression coverage

* Delete dashboard/tests/pluginSidebarItems.test.mjs

---------

Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>

Author: wcqqq1214

dashboard/src/composables/usePluginSidebarItems.ts

@@ -1,6 +1,7 @@
 import { reactive, shallowRef, onMounted, watch } from "vue";
 import { pluginApi } from "@/api/v1";
 import { useI18n } from "@/i18n/composables";
+import { resolvePluginI18n } from "@/utils/pluginI18n";
 import type { menu } from "@/layouts/full/vertical-sidebar/sidebarItem";
 
 const DEFAULT_ICON = "mdi-puzzle";
@@ -17,6 +18,7 @@ interface PluginEntry {
   i18n?: Record<
     string,
     {
+      metadata?: { display_name?: unknown };
       views?: Record<string, { title?: unknown }>;
       pages?: Record<string, { title?: unknown }>;
     }
@@ -54,7 +56,14 @@ function buildPageItem(
   locale: string,
   grouped: boolean,
 ): menu {
-  const displayName = p.display_name || p.name || "Unknown Plugin";
+  const displayName =
+    [
+      resolvePluginI18n(p.i18n, locale, "metadata.display_name"),
+      p.display_name,
+      p.name,
+    ]
+      .find((value) => typeof value === "string" && value.trim())
+      ?.trim() || "Unknown Plugin";
   const localeData = p.i18n?.[locale];
   const localizedTitle =
     localeData && typeof localeData === "object"
@@ -83,7 +92,14 @@ function buildPluginGroups(plugins: PluginEntry[], locale: string): menu[] {
   return plugins
     .filter((p) => p.activated && Array.isArray(p.pages) && p.pages.length > 0)
     .map((p) => {
-      const displayName = p.display_name || p.name || "Unknown Plugin";
+      const displayName =
+        [
+          resolvePluginI18n(p.i18n, locale, "metadata.display_name"),
+          p.display_name,
+          p.name,
+        ]
+          .find((value) => typeof value === "string" && value.trim())
+          ?.trim() || "Unknown Plugin";
       return {
         value: `plugin:${p.name}`,
         title: displayName,

docs/en/dev/star/guides/plugin-i18n.md

@@ -26,6 +26,8 @@ When the current locale has no translation, a field is missing, or the locale fi
 
 `metadata` overrides the plugin name, card short description, and description shown on plugin pages.
 
+Sidebar plugin group headings, hover cards, and default titles that use the plugin name also read `metadata.display_name` for the current locale and update immediately when the language changes. The sidebar accepts only nonempty strings; missing, blank, or invalid translations fall back to the original `display_name`, then `name`. The existing precedence of `views.<view>.title` over `pages.<view>.title` stays unchanged; grouped views without a valid title still show their directory name. Routes, pinned items, and expanded groups use stable plugin IDs or view paths and do not change with translated names.
+
 ```json
 {
   "metadata": {

docs/zh/dev/star/guides/plugin-i18n.md

@@ -26,6 +26,8 @@ your_plugin/
 
 `metadata` 用于覆盖插件在插件页展示的名称、卡片短描述和描述。
 
+侧栏的插件分组标题、悬浮提示和使用插件名称的默认标题也会读取当前语言的 `metadata.display_name`，切换语言后立即更新。侧栏只接受非空字符串；翻译缺失、为空白或类型无效时，依次回退到原始 `display_name`、`name`。已有 `views.<视图名>.title` 优先于 `pages.<视图名>.title` 的解析规则不变；分组内没有有效标题的视图仍显示目录名。路由、置顶和展开状态使用稳定的插件 ID 或视图路径，不随名称翻译变化。
+
 ```json
 {
   "metadata": {