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/lib/shared/traverser.js

@@ -0,0 +1,202 @@
+/**
+ * @fileoverview Traverser to traverse AST trees.
+ * @author Nicholas C. Zakas
+ * @author Toru Nagashima
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const vk = require("eslint-visitor-keys");
+const debug = require("debug")("eslint:traverser");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Do nothing.
+ * @returns {void}
+ */
+function noop() {
+	// do nothing.
+}
+
+/**
+ * Check whether the given value is an ASTNode or not.
+ * @param {any} x The value to check.
+ * @returns {boolean} `true` if the value is an ASTNode.
+ */
+function isNode(x) {
+	return x !== null && typeof x === "object" && typeof x.type === "string";
+}
+
+/**
+ * Get the visitor keys of a given node.
+ * @param {Object} visitorKeys The map of visitor keys.
+ * @param {ASTNode} node The node to get their visitor keys.
+ * @returns {string[]} The visitor keys of the node.
+ */
+function getVisitorKeys(visitorKeys, node) {
+	let keys = visitorKeys[node.type];
+
+	if (!keys) {
+		keys = vk.getKeys(node);
+		debug(
+			'Unknown node type "%s": Estimated visitor keys %j',
+			node.type,
+			keys,
+		);
+	}
+
+	return keys;
+}
+
+/**
+ * The traverser class to traverse AST trees.
+ */
+class Traverser {
+	constructor() {
+		this._current = null;
+		this._parents = [];
+		this._skipped = false;
+		this._broken = false;
+		this._visitorKeys = null;
+		this._enter = null;
+		this._leave = null;
+	}
+
+	/**
+	 * Gives current node.
+	 * @returns {ASTNode} The current node.
+	 */
+	current() {
+		return this._current;
+	}
+
+	/**
+	 * Gives a copy of the ancestor nodes.
+	 * @returns {ASTNode[]} The ancestor nodes.
+	 */
+	parents() {
+		return this._parents.slice(0);
+	}
+
+	/**
+	 * Break the current traversal.
+	 * @returns {void}
+	 */
+	break() {
+		this._broken = true;
+	}
+
+	/**
+	 * Skip child nodes for the current traversal.
+	 * @returns {void}
+	 */
+	skip() {
+		this._skipped = true;
+	}
+
+	/**
+	 * Traverse the given AST tree.
+	 * @param {ASTNode} node The root node to traverse.
+	 * @param {Object} options The option object.
+	 * @param {Object} [options.visitorKeys=DEFAULT_VISITOR_KEYS] The keys of each node types to traverse child nodes. Default is `./default-visitor-keys.json`.
+	 * @param {Function} [options.enter=noop] The callback function which is called on entering each node.
+	 * @param {Function} [options.leave=noop] The callback function which is called on leaving each node.
+	 * @returns {void}
+	 */
+	traverse(node, options) {
+		this._current = null;
+		this._parents = [];
+		this._skipped = false;
+		this._broken = false;
+		this._visitorKeys = options.visitorKeys || vk.KEYS;
+		this._enter = options.enter || noop;
+		this._leave = options.leave || noop;
+		this._traverse(node, null);
+	}
+
+	/**
+	 * Traverse the given AST tree recursively.
+	 * @param {ASTNode} node The current node.
+	 * @param {ASTNode|null} parent The parent node.
+	 * @returns {void}
+	 * @private
+	 */
+	_traverse(node, parent) {
+		if (!isNode(node)) {
+			return;
+		}
+
+		this._current = node;
+		this._skipped = false;
+		this._enter(node, parent);
+
+		if (!this._skipped && !this._broken) {
+			const keys = getVisitorKeys(this._visitorKeys, node);
+
+			if (keys.length >= 1) {
+				this._parents.push(node);
+				for (let i = 0; i < keys.length && !this._broken; ++i) {
+					const child = node[keys[i]];
+
+					if (Array.isArray(child)) {
+						for (
+							let j = 0;
+							j < child.length && !this._broken;
+							++j
+						) {
+							this._traverse(child[j], node);
+						}
+					} else {
+						this._traverse(child, node);
+					}
+				}
+				this._parents.pop();
+			}
+		}
+
+		if (!this._broken) {
+			this._leave(node, parent);
+		}
+
+		this._current = parent;
+	}
+
+	/**
+	 * Calculates the keys to use for traversal.
+	 * @param {ASTNode} node The node to read keys from.
+	 * @returns {string[]} An array of keys to visit on the node.
+	 * @private
+	 */
+	static getKeys(node) {
+		return vk.getKeys(node);
+	}
+
+	/**
+	 * Traverse the given AST tree.
+	 * @param {ASTNode} node The root node to traverse.
+	 * @param {Object} options The option object.
+	 * @param {Object} [options.visitorKeys=DEFAULT_VISITOR_KEYS] The keys of each node types to traverse child nodes. Default is `./default-visitor-keys.json`.
+	 * @param {Function} [options.enter=noop] The callback function which is called on entering each node.
+	 * @param {Function} [options.leave=noop] The callback function which is called on leaving each node.
+	 * @returns {void}
+	 */
+	static traverse(node, options) {
+		new Traverser().traverse(node, options);
+	}
+
+	/**
+	 * The default visitor keys.
+	 * @type {Object}
+	 */
+	static get DEFAULT_VISITOR_KEYS() {
+		return vk.KEYS;
+	}
+}
+
+module.exports = Traverser;