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/deep-is/README.markdown

@@ -0,0 +1,70 @@
+deep-is
+==========
+
+Node's `assert.deepEqual() algorithm` as a standalone module. Exactly like
+[deep-equal](https://github.com/substack/node-deep-equal) except for the fact that `deepEqual(NaN, NaN) === true`.
+
+This module is around [5 times faster](https://gist.github.com/2790507)
+than wrapping `assert.deepEqual()` in a `try/catch`.
+
+[![browser support](http://ci.testling.com/thlorenz/deep-is.png)](http://ci.testling.com/thlorenz/deep-is)
+
+[![build status](https://secure.travis-ci.org/thlorenz/deep-is.png)](http://travis-ci.org/thlorenz/deep-is)
+
+example
+=======
+
+``` js
+var equal = require('deep-is');
+console.dir([
+    equal(
+        { a : [ 2, 3 ], b : [ 4 ] },
+        { a : [ 2, 3 ], b : [ 4 ] }
+    ),
+    equal(
+        { x : 5, y : [6] },
+        { x : 5, y : 6 }
+    )
+]);
+```
+
+methods
+=======
+
+var deepIs = require('deep-is')
+
+deepIs(a, b)
+---------------
+
+Compare objects `a` and `b`, returning whether they are equal according to a
+recursive equality algorithm.
+
+install
+=======
+
+With [npm](http://npmjs.org) do:
+
+```
+npm install deep-is
+```
+
+test
+====
+
+With [npm](http://npmjs.org) do:
+
+```
+npm test
+```
+
+license
+=======
+
+Copyright (c) 2012, 2013 Thorsten Lorenz <thlorenz@gmx.de>
+Copyright (c) 2012 James Halliday <mail@substack.net>
+
+Derived largely from node's assert module, which has the copyright statement:
+
+Copyright (c) 2009 Thomas Robinson <280north.com>
+
+Released under the MIT license, see LICENSE for details.