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/tinyspy/dist/index.d.cts

@@ -0,0 +1,83 @@
+declare const S: unique symbol;
+
+interface GetState {
+    <A extends any[], R>(spy: SpyInternalImpl<A, R>): SpyInternalImplState<A, R>;
+    <A extends any[], R>(spy: SpyInternal<A, R>): SpyInternalState<A, R>;
+}
+declare let spies: Set<SpyImpl<any[], any>>;
+declare let getInternalState: GetState;
+type ReturnError = ['error', any];
+type ReturnOk<R> = ['ok', R];
+type ResultFn<R> = ReturnError | ReturnOk<R>;
+interface SpyInternal<A extends any[] = any[], R = any> {
+    (this: any, ...args: A): R;
+    [S]: SpyInternalState<A, R>;
+}
+interface SpyInternalImpl<A extends any[] = any[], R = any> extends SpyInternal<A, R> {
+    [S]: SpyInternalImplState<A, R>;
+}
+interface SpyInternalState<A extends any[] = any[], R = any> {
+    called: boolean;
+    callCount: number;
+    calls: A[];
+    results: ResultFn<R>[];
+    resolves: R extends PromiseLike<infer V> ? ResultFn<V>[] : never;
+    reset(): void;
+    impl: ((...args: A) => R) | undefined;
+    next: ResultFn<R>[];
+}
+interface SpyInternalImplState<A extends any[] = any[], R = any> extends SpyInternalState<A, R> {
+    getOriginal(): (...args: A) => R;
+    willCall(cb: (...args: A) => R): this;
+    restore(): void;
+}
+interface Spy<A extends any[] = any[], R = any> extends SpyInternalState<A, R> {
+    returns: R[];
+    length: number;
+    nextError(error: any): this;
+    nextResult(result: R): this;
+}
+interface SpyImpl<A extends any[] = any[], R = any> extends Spy<A, R> {
+    getOriginal(): (...args: A) => R;
+    willCall(cb: (...args: A) => R): this;
+    restore(): void;
+}
+declare function createInternalSpy<A extends any[], R>(cb?: ((...args: A) => R) | {
+    new (...args: A): R;
+}): SpyInternal<A, R>;
+
+interface SpyFn<A extends any[] = any[], R = any> extends Spy<A, R> {
+    new (...args: A): R extends void ? any : R;
+    (...args: A): R;
+}
+declare function spy<A extends any[], R>(cb?: ((...args: A) => R) | {
+    new (...args: A): R;
+}): SpyFn<A, R>;
+
+type Procedure = (...args: any[]) => any;
+type Methods<T> = {
+    [K in keyof T]: T[K] extends Procedure ? K : never;
+}[keyof T];
+type Getters<T> = {
+    [K in keyof T]: T[K] extends Procedure ? never : K;
+}[keyof T];
+type Constructors<T> = {
+    [K in keyof T]: T[K] extends new (...args: any[]) => any ? K : never;
+}[keyof T];
+declare function internalSpyOn<T, K extends string & keyof T>(obj: T, methodName: K | {
+    getter: K;
+} | {
+    setter: K;
+}, mock?: Procedure): SpyInternalImpl<any[], any>;
+declare function spyOn<T, S extends Getters<Required<T>>>(obj: T, methodName: {
+    setter: S;
+}, mock?: (arg: T[S]) => void): SpyImpl<[T[S]], void>;
+declare function spyOn<T, G extends Getters<Required<T>>>(obj: T, methodName: {
+    getter: G;
+}, mock?: () => T[G]): SpyImpl<[], T[G]>;
+declare function spyOn<T, M extends Constructors<Required<T>>>(object: T, method: M): Required<T>[M] extends new (...args: infer A) => infer R ? SpyImpl<A, R> : never;
+declare function spyOn<T, M extends Methods<Required<T>>>(obj: T, methodName: M, mock?: T[M]): Required<T>[M] extends (...args: infer A) => infer R ? SpyImpl<A, R> : never;
+
+declare function restoreAll(): void;
+
+export { type Spy, type SpyFn, type SpyImpl, type SpyInternal, type SpyInternalImpl, createInternalSpy, getInternalState, internalSpyOn, restoreAll, spies, spy, spyOn };