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-self-assign.js

@@ -0,0 +1,186 @@
+/**
+ * @fileoverview Rule to disallow assignments where both sides are exactly the same
+ * @author Toru Nagashima
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+const SPACES = /\s+/gu;
+
+/**
+ * Traverses 2 Pattern nodes in parallel, then reports self-assignments.
+ * @param {ASTNode|null} left A left node to traverse. This is a Pattern or
+ *      a Property.
+ * @param {ASTNode|null} right A right node to traverse. This is a Pattern or
+ *      a Property.
+ * @param {boolean} props The flag to check member expressions as well.
+ * @param {Function} report A callback function to report.
+ * @returns {void}
+ */
+function eachSelfAssignment(left, right, props, report) {
+	if (!left || !right) {
+		// do nothing
+	} else if (
+		left.type === "Identifier" &&
+		right.type === "Identifier" &&
+		left.name === right.name
+	) {
+		report(right);
+	} else if (
+		left.type === "ArrayPattern" &&
+		right.type === "ArrayExpression"
+	) {
+		const end = Math.min(left.elements.length, right.elements.length);
+
+		for (let i = 0; i < end; ++i) {
+			const leftElement = left.elements[i];
+			const rightElement = right.elements[i];
+
+			// Avoid cases such as [...a] = [...a, 1]
+			if (
+				leftElement &&
+				leftElement.type === "RestElement" &&
+				i < right.elements.length - 1
+			) {
+				break;
+			}
+
+			eachSelfAssignment(leftElement, rightElement, props, report);
+
+			// After a spread element, those indices are unknown.
+			if (rightElement && rightElement.type === "SpreadElement") {
+				break;
+			}
+		}
+	} else if (left.type === "RestElement" && right.type === "SpreadElement") {
+		eachSelfAssignment(left.argument, right.argument, props, report);
+	} else if (
+		left.type === "ObjectPattern" &&
+		right.type === "ObjectExpression" &&
+		right.properties.length >= 1
+	) {
+		/*
+		 * Gets the index of the last spread property.
+		 * It's possible to overwrite properties followed by it.
+		 */
+		let startJ = 0;
+
+		for (let i = right.properties.length - 1; i >= 0; --i) {
+			const propType = right.properties[i].type;
+
+			if (
+				propType === "SpreadElement" ||
+				propType === "ExperimentalSpreadProperty"
+			) {
+				startJ = i + 1;
+				break;
+			}
+		}
+
+		for (let i = 0; i < left.properties.length; ++i) {
+			for (let j = startJ; j < right.properties.length; ++j) {
+				eachSelfAssignment(
+					left.properties[i],
+					right.properties[j],
+					props,
+					report,
+				);
+			}
+		}
+	} else if (
+		left.type === "Property" &&
+		right.type === "Property" &&
+		right.kind === "init" &&
+		!right.method
+	) {
+		const leftName = astUtils.getStaticPropertyName(left);
+
+		if (
+			leftName !== null &&
+			leftName === astUtils.getStaticPropertyName(right)
+		) {
+			eachSelfAssignment(left.value, right.value, props, report);
+		}
+	} else if (
+		props &&
+		astUtils.skipChainExpression(left).type === "MemberExpression" &&
+		astUtils.skipChainExpression(right).type === "MemberExpression" &&
+		astUtils.isSameReference(left, right)
+	) {
+		report(right);
+	}
+}
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		type: "problem",
+
+		defaultOptions: [{ props: true }],
+
+		docs: {
+			description:
+				"Disallow assignments where both sides are exactly the same",
+			recommended: true,
+			url: "https://eslint.org/docs/latest/rules/no-self-assign",
+		},
+
+		schema: [
+			{
+				type: "object",
+				properties: {
+					props: {
+						type: "boolean",
+					},
+				},
+				additionalProperties: false,
+			},
+		],
+
+		messages: {
+			selfAssignment: "'{{name}}' is assigned to itself.",
+		},
+	},
+
+	create(context) {
+		const sourceCode = context.sourceCode;
+		const [{ props }] = context.options;
+
+		/**
+		 * Reports a given node as self assignments.
+		 * @param {ASTNode} node A node to report. This is an Identifier node.
+		 * @returns {void}
+		 */
+		function report(node) {
+			context.report({
+				node,
+				messageId: "selfAssignment",
+				data: {
+					name: sourceCode.getText(node).replace(SPACES, ""),
+				},
+			});
+		}
+
+		return {
+			AssignmentExpression(node) {
+				if (["=", "&&=", "||=", "??="].includes(node.operator)) {
+					eachSelfAssignment(node.left, node.right, props, report);
+				}
+			},
+		};
+	},
+};