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/rules/no-global-assign.js

@@ -0,0 +1,101 @@
+/**
+ * @fileoverview Rule to disallow assignments to native objects or read-only global variables
+ * @author Ilya Volodin
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		type: "suggestion",
+
+		defaultOptions: [{ exceptions: [] }],
+
+		docs: {
+			description:
+				"Disallow assignments to native objects or read-only global variables",
+			recommended: true,
+			url: "https://eslint.org/docs/latest/rules/no-global-assign",
+		},
+
+		schema: [
+			{
+				type: "object",
+				properties: {
+					exceptions: {
+						type: "array",
+						items: { type: "string" },
+						uniqueItems: true,
+					},
+				},
+				additionalProperties: false,
+			},
+		],
+
+		messages: {
+			globalShouldNotBeModified:
+				"Read-only global '{{name}}' should not be modified.",
+		},
+	},
+
+	create(context) {
+		const sourceCode = context.sourceCode;
+		const [{ exceptions }] = context.options;
+
+		/**
+		 * Reports write references.
+		 * @param {Reference} reference A reference to check.
+		 * @param {number} index The index of the reference in the references.
+		 * @param {Reference[]} references The array that the reference belongs to.
+		 * @returns {void}
+		 */
+		function checkReference(reference, index, references) {
+			const identifier = reference.identifier;
+
+			if (
+				reference.init === false &&
+				reference.isWrite() &&
+				/*
+				 * Destructuring assignments can have multiple default value,
+				 * so possibly there are multiple writeable references for the same identifier.
+				 */
+				(index === 0 || references[index - 1].identifier !== identifier)
+			) {
+				context.report({
+					node: identifier,
+					messageId: "globalShouldNotBeModified",
+					data: {
+						name: identifier.name,
+					},
+				});
+			}
+		}
+
+		/**
+		 * Reports write references if a given variable is read-only builtin.
+		 * @param {Variable} variable A variable to check.
+		 * @returns {void}
+		 */
+		function checkVariable(variable) {
+			if (
+				variable.writeable === false &&
+				!exceptions.includes(variable.name)
+			) {
+				variable.references.forEach(checkReference);
+			}
+		}
+
+		return {
+			Program(node) {
+				const globalScope = sourceCode.getScope(node);
+
+				globalScope.variables.forEach(checkVariable);
+			},
+		};
+	},
+};