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/bits-ui/dist/bits/pin-input/components/pin-input-cell.svelte

@@ -0,0 +1,36 @@
+<script lang="ts">
+	import { boxWith, mergeProps } from "svelte-toolbelt";
+	import type { PinInputCellProps } from "../types.js";
+	import { PinInputCellState } from "../pin-input.svelte.js";
+	import { createId } from "../../../internal/create-id.js";
+
+	const uid = $props.id();
+
+	let {
+		id = createId(uid),
+		ref = $bindable(null),
+		cell,
+		child,
+		children,
+		...restProps
+	}: PinInputCellProps = $props();
+
+	const cellState = PinInputCellState.create({
+		id: boxWith(() => id),
+		ref: boxWith(
+			() => ref,
+			(v) => (ref = v)
+		),
+		cell: boxWith(() => cell),
+	});
+
+	const mergedProps = $derived(mergeProps(restProps, cellState.props));
+</script>
+
+{#if child}
+	{@render child({ props: mergedProps })}
+{:else}
+	<div {...mergedProps}>
+		{@render children?.()}
+	</div>
+{/if}

web/node_modules/bits-ui/dist/bits/pin-input/components/pin-input-cell.svelte.d.ts

@@ -0,0 +1,4 @@
+import type { PinInputCellProps } from "../types.js";
+declare const PinInputCell: import("svelte").Component<PinInputCellProps, {}, "ref">;
+type PinInputCell = ReturnType<typeof PinInputCell>;
+export default PinInputCell;

web/node_modules/bits-ui/dist/bits/pin-input/components/pin-input.svelte

@@ -0,0 +1,71 @@
+<script lang="ts">
+	import { boxWith, mergeProps } from "svelte-toolbelt";
+	import type { PinInputRootProps } from "../types.js";
+	import { PinInputRootState } from "../pin-input.svelte.js";
+	import { createId } from "../../../internal/create-id.js";
+	import { noop } from "../../../internal/noop.js";
+
+	const uid = $props.id();
+
+	let {
+		id = createId(uid),
+		inputId = `${createId(uid)}-input`,
+		ref = $bindable(null),
+		inputRef = $bindable(null),
+		maxlength = 6,
+		textalign = "left",
+		pattern,
+		inputmode = "numeric",
+		onComplete = noop,
+		pushPasswordManagerStrategy = "increase-width",
+		class: containerClass = "",
+		children,
+		autocomplete = "one-time-code",
+		disabled = false,
+		value = $bindable(""),
+		onValueChange = noop,
+		pasteTransformer,
+		...restProps
+	}: PinInputRootProps = $props();
+
+	const rootState = PinInputRootState.create({
+		id: boxWith(() => id),
+		ref: boxWith(
+			() => ref,
+			(v) => (ref = v)
+		),
+		inputRef: boxWith(
+			() => inputRef,
+			(v) => (inputRef = v)
+		),
+		inputId: boxWith(() => inputId),
+		autocomplete: boxWith(() => autocomplete),
+		maxLength: boxWith(() => maxlength),
+		textAlign: boxWith(() => textalign),
+		disabled: boxWith(() => disabled),
+		inputmode: boxWith(() => inputmode),
+		pattern: boxWith(() => pattern),
+		onComplete: boxWith(() => onComplete),
+		value: boxWith(
+			() => value,
+			(v) => {
+				value = v;
+				onValueChange(v);
+			}
+		),
+		pushPasswordManagerStrategy: boxWith(() => pushPasswordManagerStrategy),
+		pasteTransformer: boxWith(() => pasteTransformer),
+	});
+
+	const mergedInputProps = $derived(mergeProps(restProps, rootState.inputProps));
+	const mergedRootProps = $derived(mergeProps(rootState.rootProps, { class: containerClass }));
+	const mergedInputWrapperProps = $derived(mergeProps(rootState.inputWrapperProps, {}));
+</script>
+
+<div {...mergedRootProps}>
+	{@render children?.(rootState.snippetProps)}
+
+	<div {...mergedInputWrapperProps}>
+		<input {...mergedInputProps} />
+	</div>
+</div>

web/node_modules/bits-ui/dist/bits/pin-input/components/pin-input.svelte.d.ts

@@ -0,0 +1,4 @@
+import type { PinInputRootProps } from "../types.js";
+declare const PinInput: import("svelte").Component<PinInputRootProps, {}, "value" | "inputRef" | "ref">;
+type PinInput = ReturnType<typeof PinInput>;
+export default PinInput;