Add startup management functionality to the agent. Implement API endpoints for enabling and disabling startup, and update the web interface to reflect the current startup state.

lib/agent/web/app.js

@@ -8,6 +8,9 @@
   const shotGallery = document.getElementById("shot-gallery");
   const execOut = document.getElementById("exec-out");
   const execMeta = document.getElementById("exec-meta");
+  const startupState = document.getElementById("startup-state");
+  const startupAdd = document.getElementById("startup-add");
+  const startupRemove = document.getElementById("startup-remove");
 
   let objectUrls = [];
 
@@ -89,7 +92,9 @@
       ["Listen", data.listen_address],
       ["Uptime", `${data.uptime_seconds}s`],
       ["Local IPs", (data.local_ips || []).join(", ") || "—"],
+      ["Startup", data.startup_enabled ? "enabled" : "disabled"],
     ];
+    setStartup(Boolean(data.startup_enabled));
     statusFields.replaceChildren(
       ...fields.flatMap(([label, value]) => {
         const dt = document.createElement("dt");
@@ -180,6 +185,19 @@
     shotGallery.append(figure);
   }
 
+  function setStartup(enabled) {
+    startupState.textContent = enabled ? "Startup: enabled" : "Startup: disabled";
+    startupAdd.disabled = enabled;
+    startupRemove.disabled = !enabled;
+  }
+
+  async function setStartupEnabled(enabled) {
+    const res = await api("/api/v1/startup", { method: enabled ? "POST" : "DELETE" });
+    const data = await res.json();
+    setStartup(Boolean(data.startup_enabled));
+    loadStatus().catch((err) => showError(err.message));
+  }
+
   async function runCommand() {
     const command = document.getElementById("exec-command").value.trim();
     const timeout = Number(document.getElementById("exec-timeout").value);
@@ -207,6 +225,12 @@
   document.getElementById("refresh-status").addEventListener("click", () => {
     Promise.all([loadHealth(), loadStatus()]).catch((err) => showError(err.message));
   });
+  startupAdd.addEventListener("click", () => {
+    setStartupEnabled(true).catch((err) => showError(err.message));
+  });
+  startupRemove.addEventListener("click", () => {
+    setStartupEnabled(false).catch((err) => showError(err.message));
+  });
   document.getElementById("file-list").addEventListener("click", () => {
     listFiles(pathInput.value.trim()).catch((err) => showError(err.message));
   });

lib/agent/web/index.html

@@ -62,6 +62,7 @@
       border-color: var(--accent);
       color: #fff;
     }
+    button:disabled { opacity: 0.45; cursor: default; }
     .panel {
       display: none;
       background: var(--card);
@@ -142,6 +143,11 @@
         <button id="refresh-status" class="primary" type="button">Refresh</button>
       </div>
       <dl id="status-fields"></dl>
+      <div class="row" style="margin-top:1rem">
+        <span id="startup-state" class="meta">Startup: —</span>
+        <button id="startup-add" type="button">Add to startup</button>
+        <button id="startup-remove" type="button">Remove from startup</button>
+      </div>
     </section>
     <section id="files" class="panel">
       <div class="row">