feat: add Hermes frontend types, API layer, and hooks (Phase 7)

- Add "hermes" to AppId union type and all exhaustive Record<AppId>
- Add HermesModelConfig, HermesAgentConfig, HermesEnvConfig types
- Add hermes field to VisibleApps, McpApps, ProxyTakeoverStatus
- Create src/lib/api/hermes.ts with Tauri invoke wrappers
- Create src/hooks/useHermes.ts with 5 query + 3 mutation hooks
- Register hermes in APP_IDS, APP_ICON_MAP (violet color scheme)
- Split MCP_SKILLS_APP_IDS into MCP_APP_IDS (includes hermes) and
  SKILLS_APP_IDS (excludes hermes, since Hermes has no Skills support)
- Wire hermes additive-mode into App.tsx (remove/duplicate handlers),
  ProviderList.tsx (live provider ID query + In Config badge),
  mutations.ts (cache invalidation on switch/add/delete)
- Add Hermes checkbox to McpFormModal
- Add basic hermes i18n keys (en/zh/ja)

src/components/AppSwitcher.tsx

@@ -10,7 +10,14 @@ interface AppSwitcherProps {
   compact?: boolean;
 }
 
-const ALL_APPS: AppId[] = ["claude", "codex", "gemini", "opencode", "openclaw"];
+const ALL_APPS: AppId[] = [
+  "claude",
+  "codex",
+  "gemini",
+  "opencode",
+  "openclaw",
+  "hermes",
+];
 const STORAGE_KEY = "cc-switch-last-app";
 
 export function AppSwitcher({
@@ -31,6 +38,7 @@ export function AppSwitcher({
     gemini: "gemini",
     opencode: "opencode",
     openclaw: "openclaw",
+    hermes: "hermes",
   };
   const appDisplayName: Record<AppId, string> = {
     claude: "Claude",
@@ -38,6 +46,7 @@ export function AppSwitcher({
     gemini: "Gemini",
     opencode: "OpenCode",
     openclaw: "OpenClaw",
+    hermes: "Hermes",
   };
 
   // Filter apps based on visibility settings (default all visible)