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/locate-path/index.d.ts

@@ -0,0 +1,83 @@
+declare namespace locatePath {
+	interface Options {
+		/**
+		Current working directory.
+
+		@default process.cwd()
+		*/
+		readonly cwd?: string;
+
+		/**
+		Type of path to match.
+
+		@default 'file'
+		*/
+		readonly type?: 'file' | 'directory';
+
+		/**
+		Allow symbolic links to match if they point to the requested path type.
+
+		@default true
+		*/
+		readonly allowSymlinks?: boolean;
+	}
+
+	interface AsyncOptions extends Options {
+		/**
+		Number of concurrently pending promises. Minimum: `1`.
+
+		@default Infinity
+		*/
+		readonly concurrency?: number;
+
+		/**
+		Preserve `paths` order when searching.
+
+		Disable this to improve performance if you don't care about the order.
+
+		@default true
+		*/
+		readonly preserveOrder?: boolean;
+	}
+}
+
+declare const locatePath: {
+	/**
+	Synchronously get the first path that exists on disk of multiple paths.
+
+	@param paths - Paths to check.
+	@returns The first path that exists or `undefined` if none exists.
+	*/
+	sync: (
+		paths: Iterable<string>,
+		options?: locatePath.Options
+	) => string | undefined;
+
+	/**
+	Get the first path that exists on disk of multiple paths.
+
+	@param paths - Paths to check.
+	@returns The first path that exists or `undefined` if none exists.
+
+	@example
+	```
+	import locatePath = require('locate-path');
+
+	const files = [
+		'unicorn.png',
+		'rainbow.png', // Only this one actually exists on disk
+		'pony.png'
+	];
+
+	(async () => {
+		console(await locatePath(files));
+		//=> 'rainbow'
+	})();
+	```
+	*/
+	(paths: Iterable<string>, options?: locatePath.AsyncOptions): Promise<
+	string | undefined
+	>;
+};
+
+export = locatePath;