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/tinypool/dist/entry/worker.js

@@ -0,0 +1,76 @@
+import { isMovable, kRequestCountField, kResponseCountField, kTransferable, kValue } from "../common-Qw-RoVFD.js";
+import { stderr, stdout } from "../utils-De75vAgL.js";
+import { getHandler, throwInNextTick } from "../utils-B--2TaWv.js";
+import { parentPort, receiveMessageOnPort, workerData } from "node:worker_threads";
+
+//#region src/entry/worker.ts
+const [tinypoolPrivateData, workerData$1] = workerData;
+process.__tinypool_state__ = {
+	isWorkerThread: true,
+	isTinypoolWorker: true,
+	workerData: workerData$1,
+	workerId: tinypoolPrivateData.workerId
+};
+const memoryUsage = process.memoryUsage.bind(process);
+let useAtomics = process.env.PISCINA_DISABLE_ATOMICS !== "1";
+parentPort.on("message", (message) => {
+	useAtomics = process.env.PISCINA_DISABLE_ATOMICS === "1" ? false : message.useAtomics;
+	const { port, sharedBuffer, filename, name } = message;
+	(async function() {
+		if (filename !== null) await getHandler(filename, name);
+		const readyMessage = { ready: true };
+		parentPort.postMessage(readyMessage);
+		port.start();
+		port.on("message", onMessage.bind(null, port, sharedBuffer));
+		atomicsWaitLoop(port, sharedBuffer);
+	})().catch(throwInNextTick);
+});
+let currentTasks = 0;
+let lastSeenRequestCount = 0;
+function atomicsWaitLoop(port, sharedBuffer) {
+	if (!useAtomics) return;
+	while (currentTasks === 0) {
+		Atomics.wait(sharedBuffer, kRequestCountField, lastSeenRequestCount);
+		lastSeenRequestCount = Atomics.load(sharedBuffer, kRequestCountField);
+		let entry;
+		while ((entry = receiveMessageOnPort(port)) !== void 0) onMessage(port, sharedBuffer, entry.message);
+	}
+}
+function onMessage(port, sharedBuffer, message) {
+	currentTasks++;
+	const { taskId, task, filename, name } = message;
+	(async function() {
+		let response;
+		let transferList = [];
+		try {
+			const handler = await getHandler(filename, name);
+			if (handler === null) throw new Error(`No handler function "${name}" exported from "${filename}"`);
+			let result = await handler(task);
+			if (isMovable(result)) {
+				transferList = transferList.concat(result[kTransferable]);
+				result = result[kValue];
+			}
+			response = {
+				taskId,
+				result,
+				error: null,
+				usedMemory: memoryUsage().heapUsed
+			};
+			if (stdout()?.writableLength > 0) await new Promise((resolve) => process.stdout.write("", resolve));
+			if (stderr()?.writableLength > 0) await new Promise((resolve) => process.stderr.write("", resolve));
+		} catch (error) {
+			response = {
+				taskId,
+				result: null,
+				error,
+				usedMemory: memoryUsage().heapUsed
+			};
+		}
+		currentTasks--;
+		port.postMessage(response, transferList);
+		Atomics.add(sharedBuffer, kResponseCountField, 1);
+		atomicsWaitLoop(port, sharedBuffer);
+	})().catch(throwInNextTick);
+}
+
+//#endregion