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/p-locate/index.js

@@ -0,0 +1,50 @@
+'use strict';
+const pLimit = require('p-limit');
+
+class EndError extends Error {
+	constructor(value) {
+		super();
+		this.value = value;
+	}
+}
+
+// The input can also be a promise, so we await it
+const testElement = async (element, tester) => tester(await element);
+
+// The input can also be a promise, so we `Promise.all()` them both
+const finder = async element => {
+	const values = await Promise.all(element);
+	if (values[1] === true) {
+		throw new EndError(values[0]);
+	}
+
+	return false;
+};
+
+const pLocate = async (iterable, tester, options) => {
+	options = {
+		concurrency: Infinity,
+		preserveOrder: true,
+		...options
+	};
+
+	const limit = pLimit(options.concurrency);
+
+	// Start all the promises concurrently with optional limit
+	const items = [...iterable].map(element => [element, limit(testElement, element, tester)]);
+
+	// Check the promises either serially or concurrently
+	const checkLimit = pLimit(options.preserveOrder ? 1 : Infinity);
+
+	try {
+		await Promise.all(items.map(element => checkLimit(finder, element)));
+	} catch (error) {
+		if (error instanceof EndError) {
+			return error.value;
+		}
+
+		throw error;
+	}
+};
+
+module.exports = pLocate;