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

@@ -0,0 +1,48 @@
+import type { DateValue } from "@internationalized/date";
+import { type ReadableBoxedValues, type WritableBoxedValues } from "svelte-toolbelt";
+import { Context } from "runed";
+import type { DateMatcher, DateRange, SegmentPart } from "../../shared/index.js";
+import type { Granularity, HourCycle, WeekStartsOn } from "../../shared/date/types.js";
+export declare const DateRangePickerRootContext: Context<DateRangePickerRootState>;
+interface DateRangePickerRootStateOpts extends WritableBoxedValues<{
+    value: DateRange;
+    startValue: DateValue | undefined;
+    endValue: DateValue | undefined;
+    open: boolean;
+    placeholder: DateValue;
+}>, ReadableBoxedValues<{
+    readonlySegments: SegmentPart[];
+    isDateUnavailable: DateMatcher;
+    isDateDisabled: DateMatcher;
+    minValue: DateValue | undefined;
+    maxValue: DateValue | undefined;
+    minDays: number | undefined;
+    maxDays: number | undefined;
+    disabled: boolean;
+    readonly: boolean;
+    granularity: Granularity | undefined;
+    hourCycle: HourCycle | undefined;
+    locale: string;
+    hideTimeZone: boolean;
+    required: boolean;
+    preventDeselect: boolean;
+    pagedNavigation: boolean;
+    weekStartsOn: WeekStartsOn | undefined;
+    weekdayFormat: Intl.DateTimeFormatOptions["weekday"];
+    fixedWeeks: boolean;
+    numberOfMonths: number;
+    calendarLabel: string;
+    disableDaysOutsideMonth: boolean;
+    excludeDisabled: boolean;
+    onRangeSelect?: () => void;
+    monthFormat: Intl.DateTimeFormatOptions["month"] | ((month: number) => string);
+    yearFormat: Intl.DateTimeFormatOptions["year"] | ((year: number) => string);
+}> {
+    defaultPlaceholder: DateValue;
+}
+export declare class DateRangePickerRootState {
+    static create(opts: DateRangePickerRootStateOpts): DateRangePickerRootState;
+    readonly opts: DateRangePickerRootStateOpts;
+    constructor(opts: DateRangePickerRootStateOpts);
+}
+export {};