Add EC2 Launch Template strain genesis for AWS horizontal scale.

Ship POST /api/v1/forge/launch-template with cloud-init user-data embedding genesis snapshot hash and strain card ID; first template-tagged auth pins SpreadGeneration=0 and ParentAgentID=template.

server/web/src/components/Fleet/LaunchTemplateExportPanel.tsx

@@ -0,0 +1,49 @@
+import { useState } from 'react';
+import { api } from '../../api/client';
+import { LAUNCH_TEMPLATE_FILES, downloadLaunchTemplateFile, type LaunchTemplateExportResponse } from '../../help/launchTemplateExport';
+
+export default function LaunchTemplateExportPanel({ serverBase, buildId = '', campaign = '', strainCardId = '' }: {
+  serverBase: string; buildId?: string; campaign?: string; strainCardId?: string;
+}) {
+  const [busy, setBusy] = useState(false);
+  const [err, setErr] = useState('');
+  const [last, setLast] = useState<LaunchTemplateExportResponse | null>(null);
+
+  const onGenerate = async () => {
+    setErr('');
+    setBusy(true);
+    try {
+      const resp = await api.forgeLaunchTemplate({
+        server_url: serverBase,
+        build_id: buildId.trim() || undefined,
+        campaign: campaign.trim() || undefined,
+        strain_card_id: strainCardId.trim() || undefined,
+      });
+      if (!resp.success) throw new Error(resp.error ?? 'launch template export failed');
+      setLast(resp);
+    } catch (e) {
+      setErr(e instanceof Error ? e.message : String(e));
+    } finally {
+      setBusy(false);
+    }
+  };
+
+  return (
+    <div className="crucible-launch-template" style={{ marginTop: '0.75rem' }}>
+      <p className="crucible-seek-blurb" style={{ marginBottom: '0.5rem' }}>
+        EC2 Launch Template strain genesis — cloud-init embeds genesis snapshot hash, strain card ID, and server URL.
+      </p>
+      <div style={{ display: 'flex', flexWrap: 'wrap', gap: '0.5rem', alignItems: 'center' }}>
+        <button type="button" className="button crucible-op-btn" disabled={busy || !serverBase.trim()} onClick={() => void onGenerate()}>
+          {busy ? 'Generating…' : 'Generate launch template'}
+        </button>
+        {last ? LAUNCH_TEMPLATE_FILES.map((f) => (
+          <button key={f.id} type="button" className="button crucible-op-btn" onClick={() => downloadLaunchTemplateFile(last, f.field, f.label)}>
+            {f.label}
+          </button>
+        )) : null}
+      </div>
+      {err ? <p className="form-error" style={{ marginTop: '0.35rem' }}>{err}</p> : null}
+    </div>
+  );
+}