Add a Windows agent (PowerShell)

Reports a Windows machine the way the Linux agent does, replacing the
"planned" stub in agent/windows: scheduled tasks plus hostname, IPv4
addresses, CPU model/cores/current load, memory, every fixed disk, and
TCP/UDP listening ports with the owning process (which feed the Ports
card, localhost-only listeners included).

Scripts (plain ASCII by design -- they are downloaded as text and Windows
PowerShell 5.1 reads BOM-less files as ANSI):
- report-tasks.ps1: collects and POSTs to /api/agent/report. Works in
  Windows PowerShell 5.1 and PowerShell 7. -DryRun prints the JSON.
  Microsoft's own \Microsoft\ tasks (hundreds) are left out unless
  INCLUDE_MICROSOFT_TASKS is set. Triggers are turned into readable text
  ("Weekly on Mon, Wed at 03:00", "At logon", "..., repeating every 15 min").
  Self-signed certificates work via API_INSECURE on both PowerShell
  versions (they need different mechanisms).
- install.ps1: elevated only; downloads the agent to ProgramData, writes
  agent.json with permissions locked to SYSTEM and Administrators *before*
  the token goes in, and registers a SYSTEM scheduled task (every 15 min
  plus at startup with a 2 min delay). Reinstalling replaces the task.
- uninstall.ps1: removes the task and only the files the agent installed.

Server: accepts schedule_type "windows_task"; a server can be registered
as Windows (Add a server has an operating system choice); an agent's
reported os_type ("linux"/"windows", anything else ignored) corrects the
stored one. The Servers page shows the right install and uninstall
command for each OS (Windows PowerShell 5.1 one-liners, with a self-signed
variant and a note about PowerShell 7), and Windows tasks are labelled
"Windows scheduled tasks". The Linux commands are unchanged.

Verified on this Windows machine, in both PowerShell 5.1 and 7:
- Real dry runs found and fixed bugs before anything shipped: tasks and
  ports came out as one nested item (return , $out wrapped twice), integer
  keys in an ordered dictionary index by position (wrong weekday names),
  and generic "Trigger" labels.
- End to end against the real agent-report router: HTTP, self-signed HTTPS
  refused by default and accepted with API_INSECURE, wrong token gives a
  clear one-line error and exit 1, and Swedish letters plus a euro sign
  survive JSON -> UTF-8 -> HTTP -> SQLite.
- 35 checks on trigger/action/duration descriptions, 20 on the installer's
  building blocks (task parts built but not registered, credentials file
  content and ACL, download over HTTP and self-signed HTTPS), 18 on the
  server rules, and the generated one-liners run through PowerShell's
  parser. The documented one-liners were run through iex and stop at the
  administrator check without changing anything.
- Found that PowerShell 7 ignores the ServicePointManager certificate
  override, so the installer's own download now uses -SkipCertificateCheck
  there.

NOT verified: the elevated install itself. Registering a SYSTEM scheduled
task needs elevation and changes the machine, so it was not run: the task
registration, that the repeating trigger really runs indefinitely, and
the agent running as SYSTEM under Task Scheduler have not been exercised.
Windows 10 / Server 2016 or newer is assumed; older is untested.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/pages/Servers.tsx

@@ -9,6 +9,7 @@ import { usePagination } from "../hooks/usePagination";
 import Pagination from "../components/Pagination";
 import { downloadCsv } from "../utils/csv";
 import { TagBadges } from "../components/ServerTags";
+import { AGENT_RUN_HINT, agentOsOf, installCommand, uninstallCommand, type AgentOs } from "../utils/agentCommands";
 import { tagBadge, useTagColors } from "../utils/tags";
 
 function typeBadgeStyle(colors: Record<string, string>, type: string): CSSProperties {
@@ -17,18 +18,6 @@ function typeBadgeStyle(colors: Record<string, string>, type: string): CSSProper
   return { backgroundColor: `${color}22`, color, border: `1px solid ${color}55` };
 }
 
-function installCommand(token: string, insecure: boolean): string {
-  const curlFlags = insecure ? "-fsSL -k" : "-fsSL";
-  const envVars = insecure
-    ? `API_URL=${window.location.origin} API_TOKEN=${token} API_INSECURE=true`
-    : `API_URL=${window.location.origin} API_TOKEN=${token}`;
-  return `curl ${curlFlags} ${window.location.origin}/agent/linux/install.sh | sudo ${envVars} bash`;
-}
-
-function uninstallCommand(insecure: boolean): string {
-  const curlFlags = insecure ? "-fsSL -k" : "-fsSL";
-  return `curl ${curlFlags} ${window.location.origin}/agent/linux/uninstall.sh | sudo bash`;
-}
 
 export default function Servers({ user }: { user: CurrentUser }) {
   const isAdmin = user.role === "admin";
@@ -49,6 +38,7 @@ export default function Servers({ user }: { user: CurrentUser }) {
   const [serverName, setServerName] = useState("");
   const [serverHostname, setServerHostname] = useState("");
   const [serverDescription, setServerDescription] = useState("");
+  const [serverOs, setServerOs] = useState<AgentOs>("linux");
   const [newToken, setNewToken] = useState<{ server: ServerRecord; token: string } | null>(null);
   const [uninstallFor, setUninstallFor] = useState<ServerRecord | null>(null);
   const [insecureAgent, setInsecureAgent] = useState(false);
@@ -72,6 +62,7 @@ export default function Servers({ user }: { user: CurrentUser }) {
         name: serverName,
         hostname: serverHostname || undefined,
         description: serverDescription || undefined,
+        osType: serverOs,
       });
       setNewToken(result);
       setServerName("");
@@ -154,7 +145,7 @@ export default function Servers({ user }: { user: CurrentUser }) {
             </div>
             <form onSubmit={createServer}>
               <div className="card-body row g-3">
-                <div className="col-md-4">
+                <div className="col-md-3">
                   <label className="form-label">Server name</label>
                   <input
                     className="form-control"
@@ -164,7 +155,14 @@ export default function Servers({ user }: { user: CurrentUser }) {
                     onChange={(e) => setServerName(e.target.value)}
                   />
                 </div>
-                <div className="col-md-4">
+                <div className="col-md-2">
+                  <label className="form-label">Operating system</label>
+                  <select className="form-select" value={serverOs} onChange={(e) => setServerOs(e.target.value as AgentOs)}>
+                    <option value="linux">Linux</option>
+                    <option value="windows">Windows</option>
+                  </select>
+                </div>
+                <div className="col-md-3">
                   <label className="form-label">Hostname</label>
                   <input
                     className="form-control"
@@ -213,13 +211,19 @@ export default function Servers({ user }: { user: CurrentUser }) {
                     This Homelab Manager instance uses a self-signed certificate (skip TLS verification on the agent)
                   </span>
                 </label>
-                <p className="text-secondary">
-                  Install the agent on the server (run as root — put sudo right after the pipe, not before curl):
-                </p>
+                <p className="text-secondary">{AGENT_RUN_HINT[agentOsOf(newToken.server.osType)].install}</p>
                 <div className="input-group">
-                  <pre className="form-control text-wrap mb-0">{installCommand(newToken.token, insecureAgent)}</pre>
-                  <CopyButton text={installCommand(newToken.token, insecureAgent)} />
+                  <pre className="form-control text-wrap mb-0">
+                    {installCommand(agentOsOf(newToken.server.osType), window.location.origin, newToken.token, insecureAgent)}
+                  </pre>
+                  <CopyButton text={installCommand(agentOsOf(newToken.server.osType), window.location.origin, newToken.token, insecureAgent)} />
                 </div>
+                {agentOsOf(newToken.server.osType) === "windows" && insecureAgent && (
+                  <div className="text-secondary small mt-2">
+                    This form is for Windows PowerShell 5.1, the one built into Windows. In PowerShell 7 the download step needs{" "}
+                    <code>-SkipCertificateCheck</code> instead.
+                  </div>
+                )}
               </div>
               <div className="card-footer">
                 <button className="btn" onClick={() => setNewToken(null)}>
@@ -235,10 +239,12 @@ export default function Servers({ user }: { user: CurrentUser }) {
                 <h3 className="card-title">Uninstall agent from {uninstallFor.name}</h3>
               </div>
               <div className="card-body">
-                <p className="text-secondary">Run this on the server as root to stop and remove the agent (its entry here is kept):</p>
+                <p className="text-secondary">{AGENT_RUN_HINT[agentOsOf(uninstallFor.osType)].uninstall}</p>
                 <div className="input-group">
-                  <pre className="form-control text-wrap mb-0">{uninstallCommand(insecureAgent)}</pre>
-                  <CopyButton text={uninstallCommand(insecureAgent)} />
+                  <pre className="form-control text-wrap mb-0">
+                    {uninstallCommand(agentOsOf(uninstallFor.osType), window.location.origin, insecureAgent)}
+                  </pre>
+                  <CopyButton text={uninstallCommand(agentOsOf(uninstallFor.osType), window.location.origin, insecureAgent)} />
                 </div>
               </div>
               <div className="card-footer">