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-check/bin/svelte-check

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+require('./ts-version-check.js');
+require('../dist/src/index.js');

web/node_modules/svelte-check/bin/ts-version-check.js

@@ -0,0 +1,39 @@
+// @ts-check
+
+let version;
+try {
+    const pkg = require('typescript/package.json');
+    version = pkg.version;
+} catch {}
+checkTypeScriptVersion(version);
+
+/**
+ *
+ * @param {string | undefined} version
+ * @returns
+ */
+function checkTypeScriptVersion(version) {
+    const requirement = 'svelte-check requires TypeScript >= 5.0 and <= 6.0. ';
+
+    let message = '';
+    if (version) {
+        const major = parseInt(version.split('.')[0], 10);
+        if (major < 5) {
+            message +=
+                requirement + `You are using unsupported TypeScript ${version}. \n\nNote that `;
+        } else if (major < 7) {
+            return;
+        }
+    } else {
+        message +=
+            'TypeScript is not installed in the workspace. ' + requirement + '\n\nNote that ';
+    }
+
+    message +=
+        'TypeScript 7 support currently requires both TypeScript 7 and TypeScript 6 installed in your project, ' +
+        'and requires using the --tsgo or --tsgo-experimental-api flag. ' +
+        'You can setup both version with an npm alias via the following command.\n' +
+        'npm install --save-dev typescript@~6 @typescript/native@npm:typescript@7\n';
+
+    throw new Error(message);
+}