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-empty.js

@@ -0,0 +1,153 @@
+/**
+ * @fileoverview Rule to flag use of an empty block statement
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		hasSuggestions: true,
+		type: "suggestion",
+
+		defaultOptions: [
+			{
+				allowEmptyCatch: false,
+			},
+		],
+
+		docs: {
+			description: "Disallow empty block statements",
+			recommended: true,
+			url: "https://eslint.org/docs/latest/rules/no-empty",
+		},
+
+		schema: [
+			{
+				type: "object",
+				properties: {
+					allowEmptyCatch: {
+						type: "boolean",
+					},
+				},
+				additionalProperties: false,
+			},
+		],
+
+		messages: {
+			unexpected: "Empty {{type}} statement.",
+			suggestComment: "Add comment inside empty {{type}} statement.",
+		},
+	},
+
+	create(context) {
+		const [{ allowEmptyCatch }] = context.options;
+		const sourceCode = context.sourceCode;
+
+		return {
+			BlockStatement(node) {
+				// if the body is not empty, we can just return immediately
+				if (node.body.length !== 0) {
+					return;
+				}
+
+				// a function is generally allowed to be empty
+				if (astUtils.isFunction(node.parent)) {
+					return;
+				}
+
+				if (allowEmptyCatch && node.parent.type === "CatchClause") {
+					return;
+				}
+
+				// any other block is only allowed to be empty, if it contains a comment
+				if (sourceCode.getCommentsInside(node).length > 0) {
+					return;
+				}
+
+				context.report({
+					node,
+					messageId: "unexpected",
+					data: { type: "block" },
+					suggest: [
+						{
+							messageId: "suggestComment",
+							data: { type: "block" },
+							fix(fixer) {
+								const range = [
+									node.range[0] + 1,
+									node.range[1] - 1,
+								];
+
+								return fixer.replaceTextRange(
+									range,
+									" /* empty */ ",
+								);
+							},
+						},
+					],
+				});
+			},
+
+			SwitchStatement(node) {
+				if (
+					typeof node.cases === "undefined" ||
+					node.cases.length === 0
+				) {
+					const openingBrace = sourceCode.getTokenAfter(
+						node.discriminant,
+						astUtils.isOpeningBraceToken,
+					);
+
+					const closingBrace = sourceCode.getLastToken(node);
+
+					if (
+						sourceCode.commentsExistBetween(
+							openingBrace,
+							closingBrace,
+						)
+					) {
+						return;
+					}
+
+					context.report({
+						node,
+						loc: {
+							start: openingBrace.loc.start,
+							end: closingBrace.loc.end,
+						},
+						messageId: "unexpected",
+						data: { type: "switch" },
+						suggest: [
+							{
+								messageId: "suggestComment",
+								data: { type: "switch" },
+								fix(fixer) {
+									const range = [
+										openingBrace.range[1],
+										closingBrace.range[0],
+									];
+
+									return fixer.replaceTextRange(
+										range,
+										" /* empty */ ",
+									);
+								},
+							},
+						],
+					});
+				}
+			},
+		};
+	},
+};