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-undefined.js

@@ -0,0 +1,85 @@
+/**
+ * @fileoverview Rule to flag references to the undefined variable.
+ * @author Michael Ficarra
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		type: "suggestion",
+
+		docs: {
+			description: "Disallow the use of `undefined` as an identifier",
+			recommended: false,
+			frozen: true,
+			url: "https://eslint.org/docs/latest/rules/no-undefined",
+		},
+
+		schema: [],
+
+		messages: {
+			unexpectedUndefined: "Unexpected use of undefined.",
+		},
+	},
+
+	create(context) {
+		const sourceCode = context.sourceCode;
+
+		/**
+		 * Report an invalid "undefined" identifier node.
+		 * @param {ASTNode} node The node to report.
+		 * @returns {void}
+		 */
+		function report(node) {
+			context.report({
+				node,
+				messageId: "unexpectedUndefined",
+			});
+		}
+
+		/**
+		 * Checks the given scope for references to `undefined` and reports
+		 * all references found.
+		 * @param {eslint-scope.Scope} scope The scope to check.
+		 * @returns {void}
+		 */
+		function checkScope(scope) {
+			const undefinedVar = scope.set.get("undefined");
+
+			if (!undefinedVar) {
+				return;
+			}
+
+			const references = undefinedVar.references;
+
+			const defs = undefinedVar.defs;
+
+			// Report non-initializing references (those are covered in defs below)
+			references
+				.filter(ref => !ref.init)
+				.forEach(ref => report(ref.identifier));
+
+			defs.forEach(def => report(def.name));
+		}
+
+		return {
+			"Program:exit"(node) {
+				const globalScope = sourceCode.getScope(node);
+
+				const stack = [globalScope];
+
+				while (stack.length) {
+					const scope = stack.pop();
+
+					stack.push(...scope.childScopes);
+					checkScope(scope);
+				}
+			},
+		};
+	},
+};