fix(hermes): show active provider and wire add/enable/remove actions

Switching a Hermes provider previously only fired a toast because the frontend treated Hermes as non-additive (unlike backend AppType::is_additive_mode, which lists OpenCode | OpenClaw | Hermes) and relied on the unused is_current DB flag for highlighting. Align the UI model with the backend:

- Include Hermes in ProviderActions' isAdditiveMode so the main button switches between "Add" and "Remove".
- Drive the "current" highlight from model.provider (via useHermesModelConfig) instead of the DB is_current field; model.provider is Hermes's real SSOT for the active provider.
- Reuse OpenClaw's set-as-default button slot to expose an "Enable" action on Hermes that calls switchProvider, so providers already in config can be activated without re-adding. switch_normal + apply_switch_defaults already atomically update custom_providers and model.provider, so no backend change is needed.
- Invalidate liveProviderIds + modelConfig + health in parallel after add/update/delete/switch via a new invalidateHermesProviderCaches helper, replacing four copies of three sequential awaits.

src/components/providers/ProviderActions.tsx

@@ -70,9 +70,11 @@ export function ProviderActions({
   const { t } = useTranslation();
   const iconButtonClass = "h-8 w-8 p-1";
 
-  // 累加模式应用（OpenCode 非 OMO 和 OpenClaw）
+  // 累加模式应用（OpenCode 非 OMO / OpenClaw / Hermes）
   const isAdditiveMode =
-    (appId === "opencode" && !isOmo) || appId === "openclaw";
+    (appId === "opencode" && !isOmo) ||
+    appId === "openclaw" ||
+    appId === "hermes";
 
   // 故障转移模式下的按钮逻辑（累加模式和 OMO 应用不支持故障转移）
   const isFailoverMode =
@@ -207,25 +209,36 @@ export function ProviderActions({
 
   return (
     <div className="flex items-center gap-1.5">
-      {appId === "openclaw" && isInConfig && onSetAsDefault && (
-        <Button
-          size="sm"
-          variant={isDefaultModel ? "secondary" : "default"}
-          onClick={isDefaultModel ? undefined : onSetAsDefault}
-          disabled={isDefaultModel}
-          className={cn(
-            "w-fit px-2.5",
-            isDefaultModel
-              ? "bg-gray-200 text-muted-foreground dark:bg-gray-700 opacity-60 cursor-not-allowed"
-              : "bg-blue-500 hover:bg-blue-600 dark:bg-blue-600 dark:hover:bg-blue-700",
-          )}
-        >
-          <Zap className="h-4 w-4" />
-          {isDefaultModel
-            ? t("provider.isDefault", { defaultValue: "当前默认" })
-            : t("provider.setAsDefault", { defaultValue: "设为默认" })}
-        </Button>
-      )}
+      {(appId === "openclaw" || appId === "hermes") &&
+        isInConfig &&
+        onSetAsDefault &&
+        (() => {
+          const activeLabel =
+            appId === "hermes"
+              ? t("provider.inUse", { defaultValue: "已在用" })
+              : t("provider.isDefault", { defaultValue: "当前默认" });
+          const inactiveLabel =
+            appId === "hermes"
+              ? t("provider.enable", { defaultValue: "启用" })
+              : t("provider.setAsDefault", { defaultValue: "设为默认" });
+          return (
+            <Button
+              size="sm"
+              variant={isDefaultModel ? "secondary" : "default"}
+              onClick={isDefaultModel ? undefined : onSetAsDefault}
+              disabled={isDefaultModel}
+              className={cn(
+                "w-fit px-2.5",
+                isDefaultModel
+                  ? "bg-gray-200 text-muted-foreground dark:bg-gray-700 opacity-60 cursor-not-allowed"
+                  : "bg-blue-500 hover:bg-blue-600 dark:bg-blue-600 dark:hover:bg-blue-700",
+              )}
+            >
+              <Zap className="h-4 w-4" />
+              {isDefaultModel ? activeLabel : inactiveLabel}
+            </Button>
+          );
+        })()}
 
       <Button
         size="sm"