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/pathe/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "pathe",
+  "version": "1.1.2",
+  "description": "Universal filesystem path utils",
+  "repository": "unjs/pathe",
+  "license": "MIT",
+  "sideEffects": false,
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.cjs"
+    },
+    "./utils": {
+      "types": "./dist/utils.d.ts",
+      "import": "./dist/utils.mjs",
+      "require": "./dist/utils.cjs"
+    }
+  },
+  "main": "./dist/index.cjs",
+  "types": "./dist/index.d.ts",
+  "files": [
+    "dist",
+    "utils.d.ts"
+  ],
+  "devDependencies": {
+    "@types/node": "^20.10.8",
+    "@vitest/coverage-v8": "^1.1.3",
+    "changelogen": "^0.5.5",
+    "eslint": "^8.56.0",
+    "eslint-config-unjs": "^0.2.1",
+    "jiti": "^1.21.0",
+    "prettier": "^3.1.1",
+    "typescript": "^5.3.3",
+    "unbuild": "^2.0.0",
+    "vitest": "^1.1.3"
+  },
+  "packageManager": "pnpm@8.14.0",
+  "scripts": {
+    "build": "unbuild",
+    "dev": "vitest",
+    "lint": "eslint --ext .ts . && prettier -c src test",
+    "lint:fix": "eslint --cache --ext .ts,.js,.mjs,.cjs . --fix && prettier -c src test -w",
+    "release": "pnpm test && pnpm build && changelogen --release && pnpm publish && git push --follow-tags",
+    "test": "pnpm lint && vitest run --coverage",
+    "test:types": "tsc --noEmit"
+  }
+}