Scaffold Homelab Manager foundation

Monorepo (Express+TS+Drizzle/libSQL server, React+Vite+Tabler web) matching
the stack used by ScheduleTaskManager and Sloth Manager. Includes Authentik
OIDC login with local admin/operator/viewer roles (first user becomes admin),
a generalized audit log, encrypted-at-rest storage for future integration API
tokens, the DB schema for all planned modules, and the Tabler-styled app
shell/nav. Also ports the Secrets (expiry tracker) and IP Addresses (IPAM)
modules from Sloth Manager onto the new stack.

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

web/src/utils/csv.ts

@@ -0,0 +1,15 @@
+function csvCell(value: unknown): string {
+  const s = value === null || value === undefined ? "" : String(value);
+  return /[",\n]/.test(s) ? `"${s.replace(/"/g, '""')}"` : s;
+}
+
+export function downloadCsv(filename: string, headers: string[], rows: unknown[][]) {
+  const lines = [headers, ...rows].map((row) => row.map(csvCell).join(","));
+  const blob = new Blob([lines.join("\n")], { type: "text/csv;charset=utf-8;" });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement("a");
+  a.href = url;
+  a.download = filename;
+  a.click();
+  URL.revokeObjectURL(url);
+}