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/svelte-toolbelt/dist/box/box-extras.svelte.d.ts

@@ -0,0 +1,109 @@
+import type { Getter, MaybeBoxOrGetter } from "../types.js";
+export declare const BoxSymbol: unique symbol;
+export declare const isWritableSymbol: unique symbol;
+export type ReadableBox<T> = {
+    readonly [BoxSymbol]: true;
+    readonly current: T;
+};
+export type WritableBox<T> = ReadableBox<T> & {
+    readonly [isWritableSymbol]: true;
+    current: T;
+};
+/**
+ * Creates a readonly box
+ *
+ * @param getter Function to get the value of the box
+ * @returns A box with a `current` property whose value is the result of the getter.
+ * Useful to pass state to other functions.
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function boxWith<T>(getter: () => T): ReadableBox<T>;
+/**
+ * Creates a writable box
+ *
+ * @param getter Function to get the value of the box
+ * @param setter Function to set the value of the box
+ * @returns A box with a `current` property which can be set to a new value.
+ * Useful to pass state to other functions.
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function boxWith<T>(getter: () => T, setter: (v: T) => void): WritableBox<T>;
+/**
+ * @returns Whether the value is a Box
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function isBox(value: unknown): value is ReadableBox<unknown>;
+/**
+ * @returns Whether the value is a WritableBox
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function isWritableBox(value: unknown): value is WritableBox<unknown>;
+/**
+ * Creates a box from either a static value, a box, or a getter function.
+ * Useful when you want to receive any of these types of values and generate a boxed version of it.
+ *
+ * @returns A box with a `current` property whose value.
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function boxFrom<T>(value: T | WritableBox<T>): WritableBox<T>;
+declare function boxFrom<T>(value: ReadableBox<T>): ReadableBox<T>;
+declare function boxFrom<T>(value: Getter<T>): ReadableBox<T>;
+declare function boxFrom<T>(value: MaybeBoxOrGetter<T>): ReadableBox<T>;
+declare function boxFrom<T>(value: T): WritableBox<T>;
+type GetKeys<T, U> = {
+    [K in keyof T]: T[K] extends U ? K : never;
+}[keyof T];
+type RemoveValues<T, U> = Omit<T, GetKeys<T, U>>;
+type BoxFlatten<R extends Record<string, unknown>> = Expand<RemoveValues<{
+    [K in keyof R]: R[K] extends WritableBox<infer T> ? T : never;
+}, never> & RemoveValues<{
+    readonly [K in keyof R]: R[K] extends WritableBox<infer _> ? never : R[K] extends ReadableBox<infer T> ? T : never;
+}, never>> & RemoveValues<{
+    [K in keyof R]: R[K] extends ReadableBox<infer _> ? never : R[K];
+}, never>;
+/**
+ * Function that gets an object of boxes, and returns an object of reactive values
+ *
+ * @example
+ * const count = box(0)
+ * const flat = box.flatten({ count, double: box.with(() => count.current) })
+ * // type of flat is { count: number, readonly double: number }
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function boxFlatten<R extends Record<string, unknown>>(boxes: R): BoxFlatten<R>;
+/**
+ * Function that converts a box to a readonly box.
+ *
+ * @example
+ * const count = box(0) // WritableBox<number>
+ * const countReadonly = box.readonly(count) // ReadableBox<number>
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function toReadonlyBox<T>(b: ReadableBox<T>): ReadableBox<T>;
+/**
+ * Creates a writable box.
+ *
+ * @returns A box with a `current` property which can be set to a new value.
+ * Useful to pass state to other functions.
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function simpleBox<T>(): WritableBox<T | undefined>;
+/**
+ * Creates a writable box with an initial value.
+ *
+ * @param initialValue The initial value of the box.
+ * @returns A box with a `current` property which can be set to a new value.
+ * Useful to pass state to other functions.
+ *
+ * @see {@link https://runed.dev/docs/functions/box}
+ */
+declare function simpleBox<T>(initialValue: T): WritableBox<T>;
+export { boxWith, isBox, isWritableBox, boxFrom, boxFlatten, toReadonlyBox, simpleBox };