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/max-depth.js

@@ -0,0 +1,159 @@
+/**
+ * @fileoverview A rule to set the maximum depth block can be nested in a function.
+ * @author Ian Christian Myers
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		type: "suggestion",
+
+		docs: {
+			description: "Enforce a maximum depth that blocks can be nested",
+			recommended: false,
+			url: "https://eslint.org/docs/latest/rules/max-depth",
+		},
+
+		schema: [
+			{
+				oneOf: [
+					{
+						type: "integer",
+						minimum: 0,
+					},
+					{
+						type: "object",
+						properties: {
+							maximum: {
+								type: "integer",
+								minimum: 0,
+							},
+							max: {
+								type: "integer",
+								minimum: 0,
+							},
+						},
+						additionalProperties: false,
+					},
+				],
+			},
+		],
+		messages: {
+			tooDeeply:
+				"Blocks are nested too deeply ({{depth}}). Maximum allowed is {{maxDepth}}.",
+		},
+	},
+
+	create(context) {
+		//--------------------------------------------------------------------------
+		// Helpers
+		//--------------------------------------------------------------------------
+
+		const functionStack = [],
+			option = context.options[0];
+		let maxDepth = 4;
+
+		if (
+			typeof option === "object" &&
+			(Object.hasOwn(option, "maximum") || Object.hasOwn(option, "max"))
+		) {
+			maxDepth = option.maximum || option.max;
+		}
+		if (typeof option === "number") {
+			maxDepth = option;
+		}
+
+		/**
+		 * When parsing a new function, store it in our function stack
+		 * @returns {void}
+		 * @private
+		 */
+		function startFunction() {
+			functionStack.push(0);
+		}
+
+		/**
+		 * When parsing is done then pop out the reference
+		 * @returns {void}
+		 * @private
+		 */
+		function endFunction() {
+			functionStack.pop();
+		}
+
+		/**
+		 * Save the block and Evaluate the node
+		 * @param {ASTNode} node node to evaluate
+		 * @returns {void}
+		 * @private
+		 */
+		function pushBlock(node) {
+			const len = ++functionStack[functionStack.length - 1];
+
+			if (len > maxDepth) {
+				context.report({
+					node,
+					messageId: "tooDeeply",
+					data: { depth: len, maxDepth },
+				});
+			}
+		}
+
+		/**
+		 * Pop the saved block
+		 * @returns {void}
+		 * @private
+		 */
+		function popBlock() {
+			functionStack[functionStack.length - 1]--;
+		}
+
+		//--------------------------------------------------------------------------
+		// Public API
+		//--------------------------------------------------------------------------
+
+		return {
+			Program: startFunction,
+			FunctionDeclaration: startFunction,
+			FunctionExpression: startFunction,
+			ArrowFunctionExpression: startFunction,
+			StaticBlock: startFunction,
+
+			IfStatement(node) {
+				if (node.parent.type !== "IfStatement") {
+					pushBlock(node);
+				}
+			},
+			SwitchStatement: pushBlock,
+			TryStatement: pushBlock,
+			DoWhileStatement: pushBlock,
+			WhileStatement: pushBlock,
+			WithStatement: pushBlock,
+			ForStatement: pushBlock,
+			ForInStatement: pushBlock,
+			ForOfStatement: pushBlock,
+
+			"IfStatement:exit": popBlock,
+			"SwitchStatement:exit": popBlock,
+			"TryStatement:exit": popBlock,
+			"DoWhileStatement:exit": popBlock,
+			"WhileStatement:exit": popBlock,
+			"WithStatement:exit": popBlock,
+			"ForStatement:exit": popBlock,
+			"ForInStatement:exit": popBlock,
+			"ForOfStatement:exit": popBlock,
+
+			"FunctionDeclaration:exit": endFunction,
+			"FunctionExpression:exit": endFunction,
+			"ArrowFunctionExpression:exit": endFunction,
+			"StaticBlock:exit": endFunction,
+			"Program:exit": endFunction,
+		};
+	},
+};