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/@humanwhocodes/module-importer/dist/module-importer.cjs

@@ -0,0 +1,22 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+var module$1 = require('module');
+var url = require('url');
+var path = require('path');
+
+/**
+ * @fileoverview Universal module importer
+ */
+
+//-----------------------------------------------------------------------------
+// Helpers
+//-----------------------------------------------------------------------------
+
+const __filename$1 = url.fileURLToPath((typeof document === 'undefined' ? new (require('u' + 'rl').URL)('file:' + __filename).href : (document.currentScript && document.currentScript.src || new URL('module-importer.cjs', document.baseURI).href)));
+const __dirname$1 = path.dirname(__filename$1);
+const require$1 = module$1.createRequire(__dirname$1 + "/");
+const { ModuleImporter } = require$1("./module-importer.cjs");
+
+exports.ModuleImporter = ModuleImporter;

web/node_modules/@humanwhocodes/module-importer/dist/module-importer.d.cts

@@ -0,0 +1,27 @@
+export class ModuleImporter {
+    /**
+     * Creates a new instance.
+     * @param {string} [cwd] The current working directory to resolve from.
+     */
+    constructor(cwd?: string);
+    /**
+     * The base directory from which paths should be resolved.
+     * @type {string}
+     */
+    cwd: string;
+    /**
+     * Resolves a module based on its name or location.
+     * @param {string} specifier Either an npm package name or
+     *      relative file path.
+     * @returns {string|undefined} The location of the import.
+     * @throws {Error} If specifier cannot be located.
+     */
+    resolve(specifier: string): string | undefined;
+    /**
+     * Imports a module based on its name or location.
+     * @param {string} specifier Either an npm package name or
+     *      relative file path.
+     * @returns {Promise<object>} The module's object.
+     */
+    import(specifier: string): Promise<object>;
+}

web/node_modules/@humanwhocodes/module-importer/dist/module-importer.d.ts

@@ -0,0 +1,2 @@
+export { ModuleImporter };
+import { ModuleImporter } from "./module-importer.cjs";

web/node_modules/@humanwhocodes/module-importer/dist/module-importer.js

@@ -0,0 +1,18 @@
+import { createRequire } from 'module';
+import { fileURLToPath } from 'url';
+import { dirname } from 'path';
+
+/**
+ * @fileoverview Universal module importer
+ */
+
+//-----------------------------------------------------------------------------
+// Helpers
+//-----------------------------------------------------------------------------
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+const require = createRequire(__dirname + "/");
+const { ModuleImporter } = require("./module-importer.cjs");
+
+export { ModuleImporter };