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/cssstyle/lib/allExtraProperties.js

@@ -0,0 +1,49 @@
+"use strict";
+
+/**
+ * This file contains all implemented properties that are not a part of any
+ * current specifications or drafts, but are handled by browsers nevertheless.
+ */
+
+const allWebkitProperties = require("./allWebkitProperties");
+
+module.exports = new Set([
+  "background-position-x",
+  "background-position-y",
+  "background-repeat-x",
+  "background-repeat-y",
+  "color-interpolation",
+  "color-profile",
+  "color-rendering",
+  "enable-background",
+  "glyph-orientation-horizontal",
+  "kerning",
+  "marker-offset",
+  "marks",
+  "pointer-events",
+  "shape-rendering",
+  "size",
+  "src",
+  "stop-color",
+  "stop-opacity",
+  "text-anchor",
+  "text-line-through",
+  "text-line-through-color",
+  "text-line-through-mode",
+  "text-line-through-style",
+  "text-line-through-width",
+  "text-overline",
+  "text-overline-color",
+  "text-overline-mode",
+  "text-overline-style",
+  "text-overline-width",
+  "text-rendering",
+  "text-underline",
+  "text-underline-color",
+  "text-underline-mode",
+  "text-underline-style",
+  "text-underline-width",
+  "unicode-range",
+  "vector-effect",
+  ...allWebkitProperties
+]);