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/yaml/dist/schema/yaml-1.1/omap.js

@@ -0,0 +1,77 @@
+'use strict';
+
+var identity = require('../../nodes/identity.js');
+var toJS = require('../../nodes/toJS.js');
+var YAMLMap = require('../../nodes/YAMLMap.js');
+var YAMLSeq = require('../../nodes/YAMLSeq.js');
+var pairs = require('./pairs.js');
+
+class YAMLOMap extends YAMLSeq.YAMLSeq {
+    constructor() {
+        super();
+        this.add = YAMLMap.YAMLMap.prototype.add.bind(this);
+        this.delete = YAMLMap.YAMLMap.prototype.delete.bind(this);
+        this.get = YAMLMap.YAMLMap.prototype.get.bind(this);
+        this.has = YAMLMap.YAMLMap.prototype.has.bind(this);
+        this.set = YAMLMap.YAMLMap.prototype.set.bind(this);
+        this.tag = YAMLOMap.tag;
+    }
+    /**
+     * If `ctx` is given, the return type is actually `Map<unknown, unknown>`,
+     * but TypeScript won't allow widening the signature of a child method.
+     */
+    toJSON(_, ctx) {
+        if (!ctx)
+            return super.toJSON(_);
+        const map = new Map();
+        if (ctx?.onCreate)
+            ctx.onCreate(map);
+        for (const pair of this.items) {
+            let key, value;
+            if (identity.isPair(pair)) {
+                key = toJS.toJS(pair.key, '', ctx);
+                value = toJS.toJS(pair.value, key, ctx);
+            }
+            else {
+                key = toJS.toJS(pair, '', ctx);
+            }
+            if (map.has(key))
+                throw new Error('Ordered maps must not include duplicate keys');
+            map.set(key, value);
+        }
+        return map;
+    }
+    static from(schema, iterable, ctx) {
+        const pairs$1 = pairs.createPairs(schema, iterable, ctx);
+        const omap = new this();
+        omap.items = pairs$1.items;
+        return omap;
+    }
+}
+YAMLOMap.tag = 'tag:yaml.org,2002:omap';
+const omap = {
+    collection: 'seq',
+    identify: value => value instanceof Map,
+    nodeClass: YAMLOMap,
+    default: false,
+    tag: 'tag:yaml.org,2002:omap',
+    resolve(seq, onError) {
+        const pairs$1 = pairs.resolvePairs(seq, onError);
+        const seenKeys = [];
+        for (const { key } of pairs$1.items) {
+            if (identity.isScalar(key)) {
+                if (seenKeys.includes(key.value)) {
+                    onError(`Ordered maps must not include duplicate keys: ${key.value}`);
+                }
+                else {
+                    seenKeys.push(key.value);
+                }
+            }
+        }
+        return Object.assign(new YAMLOMap(), pairs$1);
+    },
+    createNode: (schema, iterable, ctx) => YAMLOMap.from(schema, iterable, ctx)
+};
+
+exports.YAMLOMap = YAMLOMap;
+exports.omap = omap;