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/generated/implementedProperties.js

@@ -0,0 +1,79 @@
+"use strict";
+// autogenerated - 2025-06-25
+// https://www.w3.org/Style/CSS/all-properties.en.html
+
+module.exports = new Set([
+  "background",
+  "background-attachment",
+  "background-color",
+  "background-image",
+  "background-position",
+  "background-repeat",
+  "border",
+  "border-bottom",
+  "border-bottom-color",
+  "border-bottom-style",
+  "border-bottom-width",
+  "border-collapse",
+  "border-color",
+  "border-left",
+  "border-left-color",
+  "border-left-style",
+  "border-left-width",
+  "border-right",
+  "border-right-color",
+  "border-right-style",
+  "border-right-width",
+  "border-spacing",
+  "border-style",
+  "border-top",
+  "border-top-color",
+  "border-top-style",
+  "border-top-width",
+  "border-width",
+  "bottom",
+  "clear",
+  "clip",
+  "color",
+  "flex",
+  "flex-basis",
+  "flex-grow",
+  "flex-shrink",
+  "float",
+  "flood-color",
+  "font",
+  "font-family",
+  "font-size",
+  "font-style",
+  "font-variant",
+  "font-weight",
+  "height",
+  "left",
+  "lighting-color",
+  "line-height",
+  "margin",
+  "margin-bottom",
+  "margin-left",
+  "margin-right",
+  "margin-top",
+  "opacity",
+  "outline-color",
+  "padding",
+  "padding-bottom",
+  "padding-left",
+  "padding-right",
+  "padding-top",
+  "right",
+  "stop-color",
+  "top",
+  "-webkit-border-after-color",
+  "-webkit-border-before-color",
+  "-webkit-border-end-color",
+  "-webkit-border-start-color",
+  "-webkit-column-rule-color",
+  "-webkit-tap-highlight-color",
+  "-webkit-text-emphasis-color",
+  "-webkit-text-fill-color",
+  "-webkit-text-stroke-color",
+  "width"
+]);