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/bits-ui/dist/bits/utilities/scroll-lock/index.d.ts

@@ -0,0 +1,18 @@
+export type ScrollLockProps = {
+    /**
+     * Whether to prevent body scrolling when the content is open.
+     *
+     * @default true
+     */
+    preventScroll?: boolean;
+    /**
+     * The delay in milliseconds before the scrollbar is restored after closing the
+     * dialog. This is only applicable when using the `child` snippet for custom
+     * transitions and `preventScroll` is `true`. You should set this to a value
+     * greater than the transition duration to prevent content from shifting during
+     * the transition.
+     *
+     * @default null
+     */
+    restoreScrollDelay?: number | null;
+};

web/node_modules/bits-ui/dist/bits/utilities/scroll-lock/index.js

@@ -0,0 +1 @@
+export {};

web/node_modules/bits-ui/dist/bits/utilities/scroll-lock/scroll-lock.svelte

@@ -0,0 +1,10 @@
+<script lang="ts">
+	import type { ScrollLockProps } from "./index.js";
+	import { BodyScrollLock } from "../../../internal/body-scroll-lock.svelte.js";
+
+	let { preventScroll = true, restoreScrollDelay = null }: ScrollLockProps = $props();
+
+	if (preventScroll) {
+		new BodyScrollLock(preventScroll, () => restoreScrollDelay);
+	}
+</script>

web/node_modules/bits-ui/dist/bits/utilities/scroll-lock/scroll-lock.svelte.d.ts

@@ -0,0 +1,4 @@
+import type { ScrollLockProps } from "./index.js";
+declare const ScrollLock: import("svelte").Component<ScrollLockProps, {}, "">;
+type ScrollLock = ReturnType<typeof ScrollLock>;
+export default ScrollLock;