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/eslint-plugin-svelte/lib/utils/get-package-json.js

@@ -0,0 +1,74 @@
+"use strict";
+/**
+ * refer: https://github.com/mysticatea/eslint-plugin-node/blob/f45c6149be7235c0f7422d1179c25726afeecd83/lib/util/get-package-json.js
+ */
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getPackageJson = getPackageJson;
+const fs_1 = __importDefault(require("fs"));
+const path_1 = __importDefault(require("path"));
+const cache_1 = require("./cache");
+const isRunOnBrowser = !fs_1.default.readFileSync;
+const cache = (0, cache_1.createCache)();
+/**
+ * Reads the `package.json` data in a given path.
+ *
+ * Don't cache the data.
+ *
+ * @param dir The path to a directory to read.
+ * @returns The read `package.json` data, or null.
+ */
+function readPackageJson(dir) {
+    if (isRunOnBrowser)
+        return null;
+    const filePath = path_1.default.join(dir, 'package.json');
+    try {
+        const text = fs_1.default.readFileSync(filePath, 'utf8');
+        const data = JSON.parse(text);
+        if (typeof data === 'object' && data !== null) {
+            data.filePath = filePath;
+            return data;
+        }
+    }
+    catch (_err) {
+        // do nothing.
+    }
+    return null;
+}
+/**
+ * Gets a `package.json` data.
+ * The data is cached if found, then it's used after.
+ * @param startPath A file path to lookup.
+ * @returns A found `package.json` data or `null`.
+ *      This object have additional property `filePath`.
+ */
+function getPackageJson(startPath = 'a.js') {
+    if (isRunOnBrowser)
+        return null;
+    const startDir = path_1.default.dirname(path_1.default.resolve(startPath));
+    let dir = startDir;
+    let prevDir = '';
+    let data = null;
+    do {
+        data = cache.get(dir);
+        if (data) {
+            if (dir !== startDir) {
+                cache.set(startDir, data);
+            }
+            return data;
+        }
+        data = readPackageJson(dir);
+        if (data) {
+            cache.set(dir, data);
+            cache.set(startDir, data);
+            return data;
+        }
+        // Go to next.
+        prevDir = dir;
+        dir = path_1.default.resolve(dir, '..');
+    } while (dir !== prevDir);
+    cache.set(startDir, null);
+    return null;
+}