fix: power control 502 error and add instant refresh

- Power operations use /api2/extjs endpoint (not /api2/json)
- Remove unprivileged parameter that causes 400 validation error
- Refetch VM/LXC/node/status after successful power action via SWR mutate

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/lib/proxmox.js

@@ -8,33 +8,13 @@ function getEnv(key) {
   return val;
 }
 
-/**
- * Generates the Proxmox API2 Authorization header.
- * Format: PVEAPIToken=<user>@<realm>!<token-id>=<secret>
- * @param {string} _method
- * @param {string} _path
- * @param {string} _body
- * @returns {{ Authorization: string }}
- */
 function createAuthHeaders(_method, _path, _body) {
-  const TOKEN_ID = getEnv('PROXMOX_TOKEN_ID'); // e.g. "root@pam!monitorapp"
+  const TOKEN_ID = getEnv('PROXMOX_TOKEN_ID');
   const TOKEN_SECRET = getEnv('PROXMOX_TOKEN_SECRET');
   return { Authorization: `PVEAPIToken=${TOKEN_ID}=${TOKEN_SECRET}` };
 }
 
-/**
- * Fetches the Proxmox API with authentication.
- * @param {string} path
- * @param {'GET'|'POST'|'PUT'|'DELETE'} [method='GET']
- * @param {string} [body]
- * @returns {Promise<*>}
- */
 async function proxmoxFetch(path, method = 'GET', body) {
-  const headers = {
-    ...createAuthHeaders(method, path, body),
-    'Content-Type': 'application/json',
-  };
-
   const baseUrl = getEnv('PROXMOX_API_URL');
   const base = baseUrl.replace(/\/+$/, '');
   const cleanPath = path.replace(/^\/+/, '');
@@ -46,18 +26,47 @@ async function proxmoxFetch(path, method = 'GET', body) {
     const res = await axios({
       url: fullUrl,
       method,
-      headers,
+      headers: {
+        ...createAuthHeaders(method, path, body),
+        'Content-Type': 'application/json',
+      },
       data: body,
     });
-
     return res.data;
   } catch (err) {
     const status = err.response?.status || 'Unknown Status';
     const message = err.response?.data?.message || err.response?.data || err.message;
     throw new Error(`Proxmox API error ${status}: ${message}`);
   }
+}
 
+/**
+ * Sends a power action to a VM or LXC.
+ * Uses /api2/extjs endpoint (different from /api2/json used by other routes).
+ * @param {string} nodeName
+ * @param {number} vmid
+ * @param {'qemu'|'lxc'} type
+ * @param {'start'|'stop'|'restart'} action
+ * @returns {Promise<void>}
+ */
+export async function powerControl(nodeName, vmid, type, action) {
+  const baseUrl = getEnv('PROXMOX_API_URL');
+  const extjsUrl = baseUrl.replace('/api2/json', '/api2/extjs');
 
+  const res = await axios({
+    url: `${extjsUrl}/nodes/${nodeName}/${type}/${vmid}/status/${action}`,
+    method: 'POST',
+    headers: {
+      ...createAuthHeaders('POST', '', ''),
+      'Content-Type': 'application/json',
+    },
+    data: '{}',
+  });
+
+  const data = res.data?.data;
+  if (res.data?.success === 0 || !data) {
+    throw new Error(res.data?.message || 'Power operation failed');
+  }
 }
 
 /**
@@ -71,10 +80,6 @@ async function proxmoxFetch(path, method = 'GET', body) {
  * @property {number} load
  */
 
-/**
- * Fetches all Proxmox nodes and returns mapped stats.
- * @returns {Promise<ProxmoxNode[]>}
- */
 export async function getNodes() {
   const data = await proxmoxFetch('/nodes');
   return (data.data || []).map((node) => ({
@@ -102,11 +107,6 @@ export async function getNodes() {
  * @property {{ total: number; used: number }} disk
  */
 
-/**
- * Fetches QEMU VMs for a given node.
- * @param {string} nodeName
- * @returns {Promise<ProxmoxVM[]>}
- */
 export async function getVMs(nodeName) {
   const data = await proxmoxFetch(`/nodes/${nodeName}/qemu`);
   return (data.data || []).map((vm) => ({
@@ -126,11 +126,6 @@ export async function getVMs(nodeName) {
   }));
 }
 
-/**
- * Fetches LXC containers for a given node.
- * @param {string} nodeName
- * @returns {Promise<ProxmoxVM[]>}
- */
 export async function getLXC(nodeName) {
   const data = await proxmoxFetch(`/nodes/${nodeName}/lxc`);
   return (data.data || []).map((vm) => ({
@@ -159,26 +154,6 @@ export async function getLXC(nodeName) {
  * @property {{ total: number; used: number }} totalMemory
  */
 
-/**
- * Aggregated summary across all nodes.
- * @returns {Promise<SummaryStat>}
- */
-/**
- * Sends a power action to a VM or LXC.
- * @param {string} nodeName
- * @param {number} vmid
- * @param {'qemu'|'lxc'} type
- * @param {'start'|'stop'|'restart'} action
- * @returns {Promise<void>}
- */
-export async function powerControl(nodeName, vmid, type, action) {
-  await proxmoxFetch(`/nodes/${nodeName}/${type}/${vmid}/status/${action}`, 'POST');
-}
-
-/**
- * Aggregated summary across all nodes.
- * @returns {Promise<SummaryStat>}
- */
 export async function getSummary() {
   const nodes = await getNodes();
   let totalVMs = [];