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/enhanced-resolve/lib/UnsafeCachePlugin.js

@@ -0,0 +1,200 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { isRelativeRequest } = require("./util/path");
+
+/** @typedef {import("./Resolver")} Resolver */
+/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
+/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
+/** @typedef {import("./Resolver").ResolveContextYield} ResolveContextYield */
+/** @typedef {{ [k: string]: undefined | ResolveRequest | ResolveRequest[] }} Cache */
+
+/**
+ * @param {string} relativePath relative path from package root
+ * @param {string} request relative request
+ * @param {Resolver} resolver resolver instance
+ * @returns {string} normalized request with a preserved leading dot
+ */
+function joinRelativePreservingLeadingDot(relativePath, request, resolver) {
+	const normalized = resolver.join(relativePath, request);
+	return isRelativeRequest(normalized) ? normalized : `./${normalized}`;
+}
+
+/**
+ * @param {ResolveRequest} request request
+ * @returns {string | false | undefined} normalized path
+ */
+function getCachePath(request) {
+	if (request.descriptionFileRoot && !request.module) {
+		return request.descriptionFileRoot;
+	}
+	return request.path;
+}
+
+/**
+ * @param {ResolveRequest} request request
+ * @param {Resolver} resolver resolver instance
+ * @returns {string | undefined} normalized request string
+ */
+function getCacheRequest(request, resolver) {
+	const requestString = request.request;
+	if (
+		!requestString ||
+		!request.relativePath ||
+		!isRelativeRequest(requestString)
+	) {
+		return requestString;
+	}
+	return joinRelativePreservingLeadingDot(
+		request.relativePath,
+		requestString,
+		resolver,
+	);
+}
+
+// Cache-key separator: `\0` is safe because paths, requests, queries and
+// fragments produced by `parseIdentifier` never contain a raw NUL (the
+// \0-escape in identifier.js is decoded back to the original char), and the
+// context, when included, is passed through `JSON.stringify`, which escapes
+// any NUL to \u0000.
+// const SEP = "\0";
+
+/**
+ * Build the cache id for a request. Called on every `described-resolve`
+ * invocation when `unsafeCache` is on, so it's a hot path.
+ *
+ * Equivalent in meaning to the previous `JSON.stringify({ ... })` form, but
+ * ~3–5× faster since we avoid the object allocation and JSON serializer for
+ * the fields that are already plain strings.
+ * @param {string} type type of cache
+ * @param {ResolveRequest} request request
+ * @param {boolean} withContext cache with context?
+ * @param {Resolver} resolver resolver instance
+ * @returns {string} cache id
+ */
+function getCacheId(type, request, withContext, resolver) {
+	// TODO use it in the next major release, it is faster
+	// const contextPart = withContext ? JSON.stringify(request.context) : "";
+	// const path = getCachePath(request);
+	// const cacheRequest = getCacheRequest(request, resolver);
+	// return (
+	// 	type +
+	// 	SEP +
+	// 	contextPart +
+	// 	SEP +
+	// 	(path || "") +
+	// 	SEP +
+	// 	(request.query || "") +
+	// 	SEP +
+	// 	(request.fragment || "") +
+	// 	SEP +
+	// 	(cacheRequest || "")
+	// );
+
+	return JSON.stringify({
+		type,
+		context: withContext ? request.context : "",
+		path: getCachePath(request),
+		query: request.query,
+		fragment: request.fragment,
+		request: getCacheRequest(request, resolver),
+	});
+}
+
+module.exports = class UnsafeCachePlugin {
+	/**
+	 * @param {string | ResolveStepHook} source source
+	 * @param {(request: ResolveRequest) => boolean} filterPredicate filterPredicate
+	 * @param {Cache} cache cache
+	 * @param {boolean} withContext withContext
+	 * @param {string | ResolveStepHook} target target
+	 */
+	constructor(source, filterPredicate, cache, withContext, target) {
+		this.source = source;
+		this.filterPredicate = filterPredicate;
+		this.withContext = withContext;
+		this.cache = cache;
+		this.target = target;
+	}
+
+	/**
+	 * @param {Resolver} resolver the resolver
+	 * @returns {void}
+	 */
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver
+			.getHook(this.source)
+			.tapAsync("UnsafeCachePlugin", (request, resolveContext, callback) => {
+				if (!this.filterPredicate(request)) {
+					return resolver.doResolve(
+						target,
+						request,
+						null,
+						resolveContext,
+						callback,
+					);
+				}
+				const isYield = typeof resolveContext.yield === "function";
+				const cacheId = getCacheId(
+					isYield ? "yield" : "default",
+					request,
+					this.withContext,
+					resolver,
+				);
+				const cacheEntry = this.cache[cacheId];
+				if (cacheEntry) {
+					if (isYield) {
+						const yield_ =
+							/** @type {ResolveContextYield} */
+							(resolveContext.yield);
+						if (Array.isArray(cacheEntry)) {
+							for (const result of cacheEntry) yield_(result);
+						} else {
+							yield_(cacheEntry);
+						}
+						return callback(null, null);
+					}
+					return callback(null, /** @type {ResolveRequest} */ (cacheEntry));
+				}
+
+				/** @type {ResolveContextYield | undefined} */
+				let yieldFn;
+				/** @type {ResolveContextYield | undefined} */
+				let yield_;
+				/** @type {ResolveRequest[]} */
+				const yieldResult = [];
+				if (isYield) {
+					yieldFn = resolveContext.yield;
+					yield_ = (result) => {
+						yieldResult.push(result);
+					};
+				}
+
+				resolver.doResolve(
+					target,
+					request,
+					null,
+					yield_ ? { ...resolveContext, yield: yield_ } : resolveContext,
+					(err, result) => {
+						if (err) return callback(err);
+						if (isYield) {
+							if (result) yieldResult.push(result);
+							for (const result of yieldResult) {
+								/** @type {ResolveContextYield} */
+								(yieldFn)(result);
+							}
+							this.cache[cacheId] = yieldResult;
+							return callback(null, null);
+						}
+						if (result) return callback(null, (this.cache[cacheId] = result));
+						callback();
+					},
+				);
+			});
+	}
+};