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/parse5/package.json

@@ -0,0 +1,50 @@
+{
+    "name": "parse5",
+    "type": "module",
+    "description": "HTML parser and serializer.",
+    "version": "7.3.0",
+    "author": "Ivan Nikulin <ifaaan@gmail.com> (https://github.com/inikulin)",
+    "contributors": "https://github.com/inikulin/parse5/graphs/contributors",
+    "homepage": "https://parse5.js.org",
+    "funding": "https://github.com/inikulin/parse5?sponsor=1",
+    "dependencies": {
+        "entities": "^6.0.0"
+    },
+    "keywords": [
+        "html",
+        "parser",
+        "html5",
+        "WHATWG",
+        "specification",
+        "fast",
+        "html parser",
+        "html5 parser",
+        "htmlparser",
+        "parse5",
+        "serializer",
+        "html serializer",
+        "htmlserializer",
+        "parse",
+        "serialize"
+    ],
+    "license": "MIT",
+    "main": "dist/cjs/index.js",
+    "module": "dist/index.js",
+    "types": "dist/index.d.ts",
+    "exports": {
+        "import": "./dist/index.js",
+        "require": "./dist/cjs/index.js"
+    },
+    "scripts": {
+        "build:cjs": "tsc --noCheck --moduleResolution node10 --module CommonJS --target ES6 --outDir dist/cjs && echo '{\"type\":\"commonjs\"}' > dist/cjs/package.json"
+    },
+    "repository": {
+        "type": "git",
+        "url": "git://github.com/inikulin/parse5.git"
+    },
+    "files": [
+        "dist/cjs/package.json",
+        "dist/**/*.js",
+        "dist/**/*.d.ts"
+    ]
+}