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/svelte-sonner/dist/internal/constants.d.ts

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

web/node_modules/svelte-sonner/dist/internal/constants.js

@@ -0,0 +1 @@
+"use strict";

web/node_modules/svelte-sonner/dist/internal/ctx.d.ts

@@ -0,0 +1,6 @@
+import { SonnerState } from '../toast-state.svelte.js';
+import { Context } from 'runed';
+export declare const richColorsContext: Context<{
+    setRichColors: (value: boolean) => void;
+}>;
+export declare const sonnerContext: Context<SonnerState>;

web/node_modules/svelte-sonner/dist/internal/ctx.js

@@ -0,0 +1,4 @@
+import { SonnerState } from '../toast-state.svelte.js';
+import { Context } from 'runed';
+export const richColorsContext = new Context('richColorsContext');
+export const sonnerContext = new Context('<Toaster/>');

web/node_modules/svelte-sonner/dist/internal/helpers.d.ts

@@ -0,0 +1,2 @@
+export declare function cn(...classes: (string | undefined)[]): string;
+export declare const isBrowser: boolean;

web/node_modules/svelte-sonner/dist/internal/helpers.js

@@ -0,0 +1,4 @@
+export function cn(...classes) {
+    return classes.filter(Boolean).join(' ');
+}
+export const isBrowser = typeof document !== 'undefined';

web/node_modules/svelte-sonner/dist/internal/index.d.ts

@@ -0,0 +1,2 @@
+export * from './types.js';
+export * from './helpers.js';

web/node_modules/svelte-sonner/dist/internal/index.js

@@ -0,0 +1,2 @@
+export * from './types.js';
+export * from './helpers.js';

web/node_modules/svelte-sonner/dist/internal/types.d.ts

@@ -0,0 +1,3 @@
+export type Expand<T> = T extends object ? T extends infer O ? {
+    [K in keyof O]: O[K];
+} : never : T;

web/node_modules/svelte-sonner/dist/internal/types.js

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

web/node_modules/svelte-sonner/dist/internal/use-document-hidden.svelte.d.ts

@@ -0,0 +1,3 @@
+export declare function useDocumentHidden(): {
+    readonly current: boolean;
+};

web/node_modules/svelte-sonner/dist/internal/use-document-hidden.svelte.js

@@ -0,0 +1,14 @@
+import { on } from 'svelte/events';
+export function useDocumentHidden() {
+    let current = $state(typeof document !== 'undefined' ? document.hidden : false);
+    $effect(() => {
+        return on(document, 'visibilitychange', () => {
+            current = document.hidden;
+        });
+    });
+    return {
+        get current() {
+            return current;
+        }
+    };
+}