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/postcss/lib/no-work-result.d.ts

@@ -0,0 +1,45 @@
+import LazyResult from './lazy-result.js'
+import { SourceMap } from './postcss.js'
+import Processor from './processor.js'
+import Result, { Message, ResultOptions } from './result.js'
+import Root from './root.js'
+import Warning from './warning.js'
+
+declare namespace NoWorkResult {
+  export { NoWorkResult_ as default }
+}
+
+/**
+ * A Promise proxy for the result of PostCSS transformations.
+ * This lazy result instance doesn't parse css unless `NoWorkResult#root` or `Result#root`
+ * are accessed. See the example below for details.
+ * A `NoWork` instance is returned by `Processor#process` ONLY when no plugins defined.
+ *
+ * ```js
+ * const noWorkResult = postcss().process(css) // No plugins are defined.
+ *                                             // CSS is not parsed
+ * let root = noWorkResult.root // now css is parsed because we accessed the root
+ * ```
+ */
+declare class NoWorkResult_ implements LazyResult<Root> {
+  catch: Promise<Result<Root>>['catch']
+  finally: Promise<Result<Root>>['finally']
+  then: Promise<Result<Root>>['then']
+  get content(): string
+  get css(): string
+  get map(): SourceMap
+  get messages(): Message[]
+  get opts(): ResultOptions
+  get processor(): Processor
+  get root(): Root
+  get [Symbol.toStringTag](): string
+  constructor(processor: Processor, css: string, opts: ResultOptions)
+  async(): Promise<Result<Root>>
+  sync(): Result<Root>
+  toString(): string
+  warnings(): Warning[]
+}
+
+declare class NoWorkResult extends NoWorkResult_ {}
+
+export = NoWorkResult