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/runed/dist/utilities/resource/msw-handlers.js

@@ -0,0 +1,30 @@
+import { http, delay, HttpResponse } from "msw";
+export const handlers = [
+    // Basic user endpoint
+    http.get("https://api.example.com/users/:id", async ({ params }) => {
+        await delay(50);
+        return HttpResponse.json({
+            id: Number(params.id),
+            name: `User ${params.id}`,
+            email: `user${params.id}@example.com`,
+        });
+    }),
+    // Search endpoint with query params
+    http.get("https://api.example.com/search", ({ request }) => {
+        const url = new URL(request.url);
+        const query = url.searchParams.get("q");
+        const page = Number(url.searchParams.get("page")) || 1;
+        return HttpResponse.json({
+            results: [
+                { id: page * 1, title: `Result 1 for ${query}` },
+                { id: page * 2, title: `Result 2 for ${query}` },
+            ],
+            page,
+            total: 10,
+        });
+    }),
+    // Endpoint that can fail
+    http.get("https://api.example.com/error-prone", () => {
+        return new HttpResponse(null, { status: 500 });
+    }),
+];