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/@tsconfig/svelte/README.md

@@ -0,0 +1,50 @@
+### A base TSConfig for working with Svelte.
+
+Add the package to your `"devDependencies"`:
+
+```sh
+npm install --save-dev @tsconfig/svelte
+yarn add --dev @tsconfig/svelte
+```
+
+Add to your `tsconfig.json`:
+
+```json
+"extends": "@tsconfig/svelte/tsconfig.json"
+```
+
+> **NOTE**: After `@tsconfig/svelte@2.0.0`, you should add `/// <reference types="svelte" />` to a `d.ts` or a `index.ts`(entry) file to prevent typescript error.
+
+---
+
+The `tsconfig.json`: 
+
+```jsonc
+{
+  "$schema": "https://www.schemastore.org/tsconfig",
+  "_version": "5.0.0",
+
+  "compilerOptions": {
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "target": "es2017",
+    /**
+      Svelte Preprocess cannot figure out whether you have a value or a type, so tell TypeScript
+      to enforce using `import type` instead of `import` for Types.
+     */
+    "verbatimModuleSyntax": true,
+    /**
+      To have warnings/errors of the Svelte compiler at the correct position,
+      enable source maps by default.
+     */
+    "sourceMap": true,
+
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true
+  }
+}
+
+```
+
+You can find the [code here](https://github.com/tsconfig/bases/blob/master/bases/svelte.json).