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/toggle-group/toggle-group.svelte.js

@@ -0,0 +1,161 @@
+import { attachRef, } from "svelte-toolbelt";
+import { Context } from "runed";
+import { createBitsAttrs, getAriaChecked, boolToStr, boolToEmptyStrOrUndef, boolToTrueOrUndef, } from "../../internal/attrs.js";
+import { kbd } from "../../internal/kbd.js";
+import { RovingFocusGroup } from "../../internal/roving-focus-group.js";
+export const toggleGroupAttrs = createBitsAttrs({
+    component: "toggle-group",
+    parts: ["root", "item"],
+});
+const ToggleGroupRootContext = new Context("ToggleGroup.Root");
+class ToggleGroupBaseState {
+    opts;
+    rovingFocusGroup;
+    attachment;
+    constructor(opts) {
+        this.opts = opts;
+        this.attachment = attachRef(this.opts.ref);
+        this.rovingFocusGroup = new RovingFocusGroup({
+            candidateAttr: toggleGroupAttrs.item,
+            rootNode: opts.ref,
+            loop: opts.loop,
+            orientation: opts.orientation,
+        });
+    }
+    props = $derived.by(() => ({
+        id: this.opts.id.current,
+        [toggleGroupAttrs.root]: "",
+        role: "group",
+        "data-orientation": this.opts.orientation.current,
+        "data-disabled": boolToEmptyStrOrUndef(this.opts.disabled.current),
+        ...this.attachment,
+    }));
+}
+class ToggleGroupSingleState extends ToggleGroupBaseState {
+    opts;
+    isMulti = false;
+    anyPressed = $derived.by(() => this.opts.value.current !== "");
+    constructor(opts) {
+        super(opts);
+        this.opts = opts;
+    }
+    includesItem(item) {
+        return this.opts.value.current === item;
+    }
+    toggleItem(item, id) {
+        if (this.includesItem(item)) {
+            this.opts.value.current = "";
+        }
+        else {
+            this.opts.value.current = item;
+            this.rovingFocusGroup.setCurrentTabStopId(id);
+        }
+    }
+}
+class ToggleGroupMultipleState extends ToggleGroupBaseState {
+    opts;
+    isMulti = true;
+    anyPressed = $derived.by(() => this.opts.value.current.length > 0);
+    constructor(opts) {
+        super(opts);
+        this.opts = opts;
+    }
+    includesItem(item) {
+        return this.opts.value.current.includes(item);
+    }
+    toggleItem(item, id) {
+        if (this.includesItem(item)) {
+            this.opts.value.current = this.opts.value.current.filter((v) => v !== item);
+        }
+        else {
+            this.opts.value.current = [...this.opts.value.current, item];
+            this.rovingFocusGroup.setCurrentTabStopId(id);
+        }
+    }
+}
+export class ToggleGroupRootState {
+    static create(opts) {
+        const { type, ...rest } = opts;
+        const rootState = type === "single"
+            ? new ToggleGroupSingleState(rest)
+            : new ToggleGroupMultipleState(rest);
+        return ToggleGroupRootContext.set(rootState);
+    }
+}
+export class ToggleGroupItemState {
+    static create(opts) {
+        return new ToggleGroupItemState(opts, ToggleGroupRootContext.get());
+    }
+    opts;
+    root;
+    attachment;
+    #isDisabled = $derived.by(() => this.opts.disabled.current || this.root.opts.disabled.current);
+    isPressed = $derived.by(() => this.root.includesItem(this.opts.value.current));
+    #ariaChecked = $derived.by(() => {
+        return this.root.isMulti ? undefined : getAriaChecked(this.isPressed, false);
+    });
+    #ariaPressed = $derived.by(() => {
+        return this.root.isMulti ? boolToStr(this.isPressed) : undefined;
+    });
+    constructor(opts, root) {
+        this.opts = opts;
+        this.root = root;
+        this.attachment = attachRef(this.opts.ref);
+        $effect(() => {
+            if (!this.root.opts.rovingFocus.current) {
+                this.#tabIndex = 0;
+            }
+            else {
+                this.#tabIndex = this.root.rovingFocusGroup.getTabIndex(this.opts.ref.current);
+            }
+        });
+        this.onclick = this.onclick.bind(this);
+        this.onkeydown = this.onkeydown.bind(this);
+    }
+    #toggleItem() {
+        if (this.#isDisabled)
+            return;
+        this.root.toggleItem(this.opts.value.current, this.opts.id.current);
+    }
+    onclick(_) {
+        if (this.#isDisabled)
+            return;
+        this.root.toggleItem(this.opts.value.current, this.opts.id.current);
+    }
+    onkeydown(e) {
+        if (this.#isDisabled)
+            return;
+        if (e.key === kbd.ENTER || e.key === kbd.SPACE) {
+            e.preventDefault();
+            this.#toggleItem();
+            return;
+        }
+        if (!this.root.opts.rovingFocus.current)
+            return;
+        this.root.rovingFocusGroup.handleKeydown(this.opts.ref.current, e);
+    }
+    #tabIndex = $state(0);
+    snippetProps = $derived.by(() => ({
+        pressed: this.isPressed,
+    }));
+    props = $derived.by(() => ({
+        id: this.opts.id.current,
+        role: this.root.isMulti ? undefined : "radio",
+        tabindex: this.#tabIndex,
+        "data-orientation": this.root.opts.orientation.current,
+        "data-disabled": boolToEmptyStrOrUndef(this.#isDisabled),
+        "data-state": getToggleItemDataState(this.isPressed),
+        "data-value": this.opts.value.current,
+        "aria-pressed": this.#ariaPressed,
+        "aria-checked": this.#ariaChecked,
+        disabled: boolToTrueOrUndef(this.#isDisabled),
+        [toggleGroupAttrs.item]: "",
+        //
+        onclick: this.onclick,
+        onkeydown: this.onkeydown,
+        ...this.attachment,
+    }));
+}
+function getToggleItemDataState(condition) {
+    return condition ? "on" : "off";
+}