feat(hermes): expose '/v1/capabilities' as the 'hermes_capabilities' Tauri command

Hermes 已在 v2026.5.x 暴露 GET /v1/capabilities 给外部 UI 用作机器可读的能力描述，让前端能动态适配可用 endpoint / feature 而无需用版本号硬匹配。ClawPanel 之前完全没利用这层抽象，本 commit 加一条 Tauri 命令 + Web handler + 前端 wrapper，为后续 chat/runs/approval 等动态降级（老版 Gateway 没有的能力优雅隐藏 UI）打底。

scripts/dev-api.js

@@ -7063,6 +7063,13 @@ const handlers = {
     return await resp.json()
   },
 
+  async hermes_capabilities() {
+    const url = `${hermesGatewayUrl()}/v1/capabilities`
+    const resp = await globalThis.fetch(url, { signal: AbortSignal.timeout(5000), headers: { 'User-Agent': 'ClawPanel-Web' } })
+    if (!resp.ok) throw new Error(`Gateway 返回 HTTP ${resp.status}`)
+    return await resp.json()
+  },
+
   async hermes_api_proxy({ method, path: reqPath, body, headers: customHeaders } = {}) {
     const url = `${hermesGatewayUrl()}${reqPath}`
     const opts = { method: method || 'GET', headers: { 'User-Agent': 'ClawPanel-Web' } }

src-tauri/src/commands/hermes.rs

@@ -2648,6 +2648,34 @@ pub async fn hermes_health_check() -> Result<Value, String> {
     }
 }
 
+// ---------------------------------------------------------------------------
+// hermes_capabilities — 探测 Gateway 暴露的 API 能力描述（GET /v1/capabilities）
+//
+// Hermes 内核 v2026.5.x 起暴露的「机器可读 capability 描述」，给外部 UI 用来
+// 动态适配可用功能，避免在前端写死哪些 endpoint/feature 存在。例：
+// 老版本的 Gateway 没有 `/v1/runs/{id}/approval`，新版有 → 用 capabilities 判
+// 断而不是用版本号匹配。
+//
+// 不可达 / 老版 Gateway 没有该 endpoint → 返回 Err，调用方应优雅降级。
+// ---------------------------------------------------------------------------
+
+#[tauri::command]
+pub async fn hermes_capabilities() -> Result<Value, String> {
+    let url = format!("{}/v1/capabilities", hermes_gateway_url());
+
+    let client = hermes_gateway_http_client(std::time::Duration::from_secs(5))
+        .map_err(|e| format!("HTTP 客户端创建失败: {e}"))?;
+
+    match client.get(&url).send().await {
+        Ok(resp) if resp.status().is_success() => {
+            let body: Value = resp.json().await.unwrap_or(Value::Null);
+            Ok(body)
+        }
+        Ok(resp) => Err(format!("Gateway 返回 HTTP {}", resp.status())),
+        Err(e) => Err(format!("Gateway 不可达: {e}")),
+    }
+}
+
 // ---------------------------------------------------------------------------
 // hermes_detect_environments — 检测 WSL2 / Docker 中的 Hermes Agent
 // ---------------------------------------------------------------------------

src-tauri/src/lib.rs

@@ -236,6 +236,7 @@ pub fn run() {
             hermes::configure_hermes,
             hermes::hermes_gateway_action,
             hermes::hermes_health_check,
+            hermes::hermes_capabilities,
             hermes::hermes_api_proxy,
             hermes::hermes_agent_run,
             hermes::hermes_read_config,

src/lib/tauri-api.js

@@ -471,6 +471,7 @@ export const api = {
   configureHermes: (provider, apiKey, model, baseUrl) => invoke('configure_hermes', { provider, apiKey, model: model || null, baseUrl: baseUrl || null }),
   hermesGatewayAction: (action) => invoke('hermes_gateway_action', { action }),
   hermesHealthCheck: () => invoke('hermes_health_check'),
+  hermesCapabilities: () => invoke('hermes_capabilities'),
   hermesApiProxy: (method, path, body, headers) => invoke('hermes_api_proxy', { method, path, body: body || null, headers: headers || null }),
   hermesAgentRun: (input, sessionId, conversationHistory, instructions) => invoke('hermes_agent_run', { input, sessionId: sessionId || null, conversationHistory: conversationHistory || null, instructions: instructions || null }),
   hermesAgentRunStream: (input, sessionId, conversationHistory, instructions, onEvent, options) => webStreamInvoke('hermes_agent_run_stream', { input, sessionId: sessionId || null, conversationHistory: conversationHistory || null, instructions: instructions || null }, onEvent, options),