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/date-range-field/date-range-field.svelte.d.ts

@@ -0,0 +1,91 @@
+import type { DateValue } from "@internationalized/date";
+import { DOMContext, type ReadableBoxedValues, type WritableBoxedValues } from "svelte-toolbelt";
+import { Context } from "runed";
+import { DateFieldInputState, DateFieldRootState } from "../date-field/date-field.svelte.js";
+import type { DateOnInvalid, DateRange, DateRangeValidator, SegmentPart } from "../../shared/index.js";
+import type { RefAttachment, WithRefOpts } from "../../internal/types.js";
+import type { Granularity } from "../../shared/date/types.js";
+import { type Formatter } from "../../internal/date-time/formatter.js";
+export declare const dateRangeFieldAttrs: import("../../internal/attrs.js").CreateBitsAttrsReturn<readonly ["root", "label"]>;
+export declare const DateRangeFieldRootContext: Context<DateRangeFieldRootState>;
+interface DateRangeFieldRootStateOpts extends WithRefOpts, WritableBoxedValues<{
+    value: DateRange;
+    placeholder: DateValue;
+    startValue: DateValue | undefined;
+    endValue: DateValue | undefined;
+}>, ReadableBoxedValues<{
+    readonlySegments: SegmentPart[];
+    validate: DateRangeValidator | undefined;
+    onInvalid: DateOnInvalid | undefined;
+    minValue: DateValue | undefined;
+    maxValue: DateValue | undefined;
+    disabled: boolean;
+    readonly: boolean;
+    granularity: Granularity | undefined;
+    hourCycle: 12 | 24 | undefined;
+    locale: string;
+    hideTimeZone: boolean;
+    required: boolean;
+    errorMessageId: string | undefined;
+}> {
+}
+export declare class DateRangeFieldRootState {
+    #private;
+    static create(opts: DateRangeFieldRootStateOpts): DateRangeFieldRootState;
+    readonly opts: DateRangeFieldRootStateOpts;
+    startFieldState: DateFieldRootState | undefined;
+    endFieldState: DateFieldRootState | undefined;
+    descriptionId: string;
+    formatter: Formatter;
+    fieldNode: HTMLElement | null;
+    labelNode: HTMLElement | null;
+    descriptionNode: HTMLElement | null;
+    readonly startValueComplete: boolean;
+    readonly endValueComplete: boolean;
+    readonly rangeComplete: boolean;
+    domContext: DOMContext;
+    readonly attachment: RefAttachment;
+    constructor(opts: DateRangeFieldRootStateOpts);
+    readonly validationStatus: false | {
+        readonly reason: "custom";
+        readonly message: string | string[];
+    } | {
+        readonly reason: "min";
+        readonly message?: undefined;
+    } | {
+        readonly reason: "max";
+        readonly message?: undefined;
+    };
+    readonly isInvalid: boolean;
+    readonly props: {
+        readonly id: string;
+        readonly role: "group";
+        readonly "data-invalid": "" | undefined;
+    };
+}
+interface DateRangeFieldLabelStateOpts extends WithRefOpts {
+}
+export declare class DateRangeFieldLabelState {
+    #private;
+    static create(opts: DateRangeFieldLabelStateOpts): DateRangeFieldLabelState;
+    readonly opts: DateRangeFieldLabelStateOpts;
+    readonly root: DateRangeFieldRootState;
+    readonly attachment: RefAttachment;
+    constructor(opts: DateRangeFieldLabelStateOpts, root: DateRangeFieldRootState);
+    readonly props: {
+        readonly id: string;
+        readonly "data-invalid": "" | undefined;
+        readonly "data-disabled": "" | undefined;
+        readonly onclick: () => void;
+    };
+}
+interface DateRangeFieldInputStateOpts extends WithRefOpts, WritableBoxedValues<{
+    value: DateValue | undefined;
+}>, ReadableBoxedValues<{
+    name: string;
+}> {
+}
+export declare class DateRangeFieldInputState {
+    static create(opts: Omit<DateRangeFieldInputStateOpts, "value">, type: "start" | "end"): DateFieldInputState;
+}
+export {};