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/tough-cookie/dist/getPublicSuffix.js

@@ -0,0 +1,71 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getPublicSuffix = getPublicSuffix;
+const tldts_1 = require("tldts");
+// RFC 6761
+const SPECIAL_USE_DOMAINS = ['local', 'example', 'invalid', 'localhost', 'test'];
+const SPECIAL_TREATMENT_DOMAINS = ['localhost', 'invalid'];
+const defaultGetPublicSuffixOptions = {
+    allowSpecialUseDomain: false,
+    ignoreError: false,
+};
+/**
+ * Returns the public suffix of this hostname. The public suffix is the shortest domain
+ * name upon which a cookie can be set.
+ *
+ * @remarks
+ * A "public suffix" is a domain that is controlled by a
+ * public registry, such as "com", "co.uk", and "pvt.k12.wy.us".
+ * This step is essential for preventing attacker.com from
+ * disrupting the integrity of example.com by setting a cookie
+ * with a Domain attribute of "com".  Unfortunately, the set of
+ * public suffixes (also known as "registry controlled domains")
+ * changes over time.  If feasible, user agents SHOULD use an
+ * up-to-date public suffix list, such as the one maintained by
+ * the Mozilla project at http://publicsuffix.org/.
+ * (See {@link https://www.rfc-editor.org/rfc/rfc6265.html#section-5.3 | RFC6265 - Section 5.3})
+ *
+ * @example
+ * ```
+ * getPublicSuffix('www.example.com') === 'example.com'
+ * getPublicSuffix('www.subdomain.example.com') === 'example.com'
+ * ```
+ *
+ * @param domain - the domain attribute of a cookie
+ * @param options - optional configuration for controlling how the public suffix is determined
+ * @public
+ */
+function getPublicSuffix(domain, options = {}) {
+    options = { ...defaultGetPublicSuffixOptions, ...options };
+    const domainParts = domain.split('.');
+    const topLevelDomain = domainParts[domainParts.length - 1];
+    const allowSpecialUseDomain = !!options.allowSpecialUseDomain;
+    const ignoreError = !!options.ignoreError;
+    if (allowSpecialUseDomain &&
+        topLevelDomain !== undefined &&
+        SPECIAL_USE_DOMAINS.includes(topLevelDomain)) {
+        if (domainParts.length > 1) {
+            // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+            const secondLevelDomain = domainParts[domainParts.length - 2];
+            // In aforementioned example, the eTLD/pubSuf will be apple.localhost
+            return `${secondLevelDomain}.${topLevelDomain}`;
+        }
+        else if (SPECIAL_TREATMENT_DOMAINS.includes(topLevelDomain)) {
+            // For a single word special use domain, e.g. 'localhost' or 'invalid', per RFC 6761,
+            // "Application software MAY recognize {localhost/invalid} names as special, or
+            // MAY pass them to name resolution APIs as they would for other domain names."
+            return topLevelDomain;
+        }
+    }
+    if (!ignoreError &&
+        topLevelDomain !== undefined &&
+        SPECIAL_USE_DOMAINS.includes(topLevelDomain)) {
+        throw new Error(`Cookie has domain set to the public suffix "${topLevelDomain}" which is a special use domain. To allow this, configure your CookieJar with {allowSpecialUseDomain: true, rejectPublicSuffixes: false}.`);
+    }
+    const publicSuffix = (0, tldts_1.getDomain)(domain, {
+        allowIcannDomains: true,
+        allowPrivateDomains: true,
+    });
+    if (publicSuffix)
+        return publicSuffix;
+}