feat: Phase 1 — extract the client (web SPA + desktop) to dtoro/oikos-web

Problem: the hexagonal refactor churns the backend tree for nine more
phases; the UI delivery stack (web/ SPA, cmd/desktop Wails wrapper,
compose/web image) must move to its own repo first so doc/layout
rewrites land once on a backend-only tree.

Change:
- New repo git.hubris.network/dtoro/oikos-web (v0.33.0): web/, desktop/
  (updateURL repointed to oikos-web releases), compose/, own CI (web +
  desktop jobs), own deploy script (CI-green gate, TOCTOU guard,
  version-tagged images, prune-to-3), own webhook receiver on :9798 +
  launchd unit, own compose project publishing the same 8091:80.
- Cutover executed on mac-mini in order: oikos stack's web service
  stopped+removed, oikos-web project brought up on 8091; outer Caddy
  untouched (targets the published port) — serving + Authentik flow +
  /wails 404 quirk verified post-cutover.
- Stripped from oikos: web/, cmd/desktop/, compose/web/, desktop CI
  workflow, ci.yml web job, Makefile ui/desktop/desktop-package/install
  targets, the compose web service, oikos-web from deploy.sh's fallback
  prune list; wails + go-keyring dropped from go.mod, vendor synced.
- README / CONTRIBUTING / AGENTS.md / .agents dev+operations docs now
  point at the new repo; mbse + mascot design docs carry a path note.

Risk: production SPA serving depends on the new pipeline now; rollback
is versioned-image re-up of the old web service from a pre-split
checkout (port 8091). Desktop builds installed before the split still
check dtoro/oikos releases — one manual reinstall, noted in the
oikos-web release notes.

Verification: go vet, make test (race), make generate-check, golangci
(no new findings; baseline down 400→365); post-cutover curls —
localhost:8091 200, /wails/runtime.js 404, outer Caddy 302 Authentik.

web/node_modules/vitest/dist/chunks/date.W2xKR2qe.js

@@ -0,0 +1,53 @@
+const RealDate = Date;
+let now = null;
+class MockDate extends RealDate {
+  constructor(y, m, d, h, M, s, ms) {
+    super();
+    let date;
+    switch (arguments.length) {
+      case 0:
+        if (now !== null) {
+          date = new RealDate(now.valueOf());
+        } else {
+          date = new RealDate();
+        }
+        break;
+      case 1:
+        date = new RealDate(y);
+        break;
+      default:
+        d = typeof d === "undefined" ? 1 : d;
+        h = h || 0;
+        M = M || 0;
+        s = s || 0;
+        ms = ms || 0;
+        date = new RealDate(y, m, d, h, M, s, ms);
+        break;
+    }
+    Object.setPrototypeOf(date, MockDate.prototype);
+    return date;
+  }
+}
+MockDate.UTC = RealDate.UTC;
+MockDate.now = function() {
+  return new MockDate().valueOf();
+};
+MockDate.parse = function(dateString) {
+  return RealDate.parse(dateString);
+};
+MockDate.toString = function() {
+  return RealDate.toString();
+};
+function mockDate(date) {
+  const dateObj = new RealDate(date.valueOf());
+  if (Number.isNaN(dateObj.getTime())) {
+    throw new TypeError(`mockdate: The time set is an invalid date: ${date}`);
+  }
+  globalThis.Date = MockDate;
+  now = dateObj.valueOf();
+}
+function resetDate() {
+  globalThis.Date = RealDate;
+}
+
+export { RealDate as R, mockDate as m, resetDate as r };