diff --git a/dashboard/src/lib/plugin-api/marketplace.ts b/dashboard/src/lib/plugin-api/marketplace.ts
index 4e243410..d347e1c8 100644
--- a/dashboard/src/lib/plugin-api/marketplace.ts
+++ b/dashboard/src/lib/plugin-api/marketplace.ts
@@ -21,6 +21,7 @@ interface PluginApiResponse {
   id: string
   manifest: {
     manifest_version: number
+    id?: string
     name: string
     version: string
     description: string
@@ -56,6 +57,7 @@ function normalizePluginManifest(manifest: PluginApiResponse['manifest']): Plugi
 
   return {
     manifest_version: manifest.manifest_version || 1,
+    id: manifest.id,
     name: manifest.name,
     version: manifest.version,
     description: manifest.description || '',
@@ -104,10 +106,15 @@ export async function fetchPluginList(): Promise<ApiResponse<PluginInfo[]>> {
   
   const pluginList = data
     .filter(item => {
-      if (!item?.id || !item?.manifest) {
+      if (!item?.manifest) {
         console.warn('跳过无效插件数据:', item)
         return false
       }
+      const pluginId = item.manifest.id || item.id
+      if (!pluginId) {
+        console.warn('跳过缺少 ID 的插件:', item)
+        return false
+      }
       if (!item.manifest.name || !item.manifest.version) {
         console.warn('跳过缺少必需字段的插件:', item.id)
         return false
@@ -115,7 +122,7 @@ export async function fetchPluginList(): Promise<ApiResponse<PluginInfo[]>> {
       return true
     })
     .map((item) => ({
-      id: item.id,
+      id: item.manifest.id || item.id,
       manifest: normalizePluginManifest(item.manifest),
       downloads: 0,
       rating: 0,
diff --git a/dashboard/src/lib/plugin-api/types.ts b/dashboard/src/lib/plugin-api/types.ts
index fe0148f8..aaafe19d 100644
--- a/dashboard/src/lib/plugin-api/types.ts
+++ b/dashboard/src/lib/plugin-api/types.ts
@@ -25,6 +25,7 @@ export interface InstalledPlugin {
   id: string
   manifest: {
     manifest_version: number
+    id?: string
     name: string
     version: string
     description: string
diff --git a/dashboard/src/routes/plugin-detail.tsx b/dashboard/src/routes/plugin-detail.tsx
index a2cff384..c0372659 100644
--- a/dashboard/src/routes/plugin-detail.tsx
+++ b/dashboard/src/routes/plugin-detail.tsx
@@ -104,21 +104,23 @@ export function PluginDetailPage() {
         }
 
         const pluginList = JSON.parse(result.data)
-        const foundPlugin = pluginList.find((p: any) => p.id === search.pluginId)
+        const foundPlugin = pluginList.find((p: any) => (p.manifest?.id || p.id) === search.pluginId)
 
         if (!foundPlugin) {
           throw new Error('未找到该插件')
         }
 
         const rawManifest = foundPlugin.manifest || {}
+        const pluginId = rawManifest.id || foundPlugin.id
         const repositoryUrl = rawManifest.repository_url || rawManifest.urls?.repository
         const homepageUrl = rawManifest.homepage_url || rawManifest.urls?.homepage
 
         // 转换为 PluginInfo 格式
         const pluginInfo: PluginInfo = {
-          id: foundPlugin.id,
+          id: pluginId,
           manifest: {
             ...rawManifest,
+            id: pluginId,
             homepage_url: homepageUrl,
             repository_url: repositoryUrl,
             default_locale: rawManifest.default_locale || rawManifest.i18n?.default_locale || 'zh-CN',
@@ -170,8 +172,8 @@ export function PluginDetailPage() {
           return
         }
         
-        setIsInstalled(checkPluginInstalled(search.pluginId, installedPlugins.data))
-        setInstalledVersion(getInstalledPluginVersion(search.pluginId, installedPlugins.data))
+        setIsInstalled(checkPluginInstalled(pluginId, installedPlugins.data))
+        setInstalledVersion(getInstalledPluginVersion(pluginId, installedPlugins.data))
       } catch (err) {
         setError(err instanceof Error ? err.message : '加载失败')
       } finally {
@@ -196,7 +198,7 @@ export function PluginDetailPage() {
         // 如果插件已安装，优先尝试从本地读取 README
         if (isInstalled && search.pluginId) {
           try {
-            const localResponse = await fetchWithAuth(`/api/webui/plugins/local-readme/${search.pluginId}`)
+            const localResponse = await fetchWithAuth(`/api/webui/plugins/local-readme/${plugin.id}`)
             
             if (localResponse.ok) {
               const localResult = await localResponse.json()
diff --git a/dashboard/src/routes/plugins/index.tsx b/dashboard/src/routes/plugins/index.tsx
index 64ef02de..f2f5c1c1 100644
--- a/dashboard/src/routes/plugins/index.tsx
+++ b/dashboard/src/routes/plugins/index.tsx
@@ -220,6 +220,7 @@ function PluginsPageContent() {
                   id: installedPlugin.id,
                   manifest: {
                     manifest_version: installedPlugin.manifest.manifest_version || 1,
+                    id: installedPlugin.manifest.id || installedPlugin.id,
                     name: installedPlugin.manifest.name,
                     version: installedPlugin.manifest.version,
                     description: installedPlugin.manifest.description || '',
diff --git a/dashboard/src/types/plugin.ts b/dashboard/src/types/plugin.ts
index db38853e..9bc7e0ef 100644
--- a/dashboard/src/types/plugin.ts
+++ b/dashboard/src/types/plugin.ts
@@ -20,6 +20,8 @@ export interface HostApplication {
 export interface PluginManifest {
   /** 清单文件版本 */
   manifest_version: number
+  /** Manifest 声明的插件唯一标识 */
+  id?: string
   /** 插件名称 */
   name: string
   /** 插件版本 */
diff --git a/pytests/webui/test_plugin_management_routes.py b/pytests/webui/test_plugin_management_routes.py
index 8b47b640..132cee86 100644
--- a/pytests/webui/test_plugin_management_routes.py
+++ b/pytests/webui/test_plugin_management_routes.py
@@ -47,3 +47,17 @@ def test_installed_plugins_only_scan_plugins_dir_and_exclude_a_memorix(client: T
     assert ids == ["test.demo"]
     assert "a-dawn.a-memorix" not in ids
     assert all("/src/plugins/built_in/" not in plugin["path"] for plugin in payload["plugins"])
+
+
+def test_resolve_installed_plugin_path_falls_back_to_manifest_id(client: TestClient):
+    plugin_path = support_module.resolve_installed_plugin_path("test.demo")
+
+    assert plugin_path is not None
+    assert plugin_path.name == "demo_plugin"
+
+
+def test_resolve_installed_plugin_path_accepts_manifest_id_case_mismatch(client: TestClient):
+    plugin_path = support_module.resolve_installed_plugin_path("Test.Demo")
+
+    assert plugin_path is not None
+    assert plugin_path.name == "demo_plugin"
diff --git a/src/webui/routers/plugin/support.py b/src/webui/routers/plugin/support.py
index 04aa14a1..f7a3c827 100644
--- a/src/webui/routers/plugin/support.py
+++ b/src/webui/routers/plugin/support.py
@@ -213,7 +213,7 @@ def resolve_installed_plugin_path(plugin_id: str) -> Optional[Path]:
         return _resolve_safe_plugin_directory(new_format_path, plugins_dir, strict=True)
     if old_format_path.exists():
         return _resolve_safe_plugin_directory(old_format_path, plugins_dir, strict=True)
-    return None
+    return find_plugin_path_by_id(plugin_id)
 
 
 def parse_repository_url(repository_url: str) -> Tuple[str, str, str]:
@@ -256,11 +256,29 @@ def iter_plugin_directories() -> List[Path]:
 
 
 def find_plugin_path_by_id(plugin_id: str) -> Optional[Path]:
+    casefold_matched_path: Optional[Path] = None
+    normalized_plugin_id = plugin_id.casefold()
+
     for plugin_path in iter_plugin_directories():
         manifest_path = resolve_plugin_file_path(plugin_path, "_manifest.json")
         manifest = load_manifest_json(manifest_path)
-        if manifest is not None and (manifest.get("id") == plugin_id or plugin_path.name == plugin_id):
+        if manifest is None:
+            continue
+
+        manifest_id = str(manifest.get("id", ""))
+        if manifest_id == plugin_id or plugin_path.name == plugin_id:
             return plugin_path
+
+        if (
+            casefold_matched_path is None
+            and (manifest_id.casefold() == normalized_plugin_id or plugin_path.name.casefold() == normalized_plugin_id)
+        ):
+            casefold_matched_path = plugin_path
+
+    if casefold_matched_path is not None:
+        logger.warning(f"插件 ID 大小写不一致，已按大小写不敏感匹配: {plugin_id} -> {casefold_matched_path}")
+        return casefold_matched_path
+
     return None