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/runed/dist/utilities/use-geolocation/use-geolocation.svelte.js

@@ -0,0 +1,71 @@
+import { defaultNavigator, } from "../../internal/configurable-globals.js";
+/**
+ * Reactive access to the browser's [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API).
+ *
+ * @see https://runed.dev/docs/utilities/use-geolocation
+ */
+export function useGeolocation(options = {}) {
+    const { enableHighAccuracy = true, maximumAge = 30000, timeout = 27000, immediate = true, navigator = defaultNavigator, } = options;
+    const isSupported = Boolean(navigator);
+    let error = $state.raw(null);
+    let position = $state({
+        timestamp: 0,
+        coords: {
+            accuracy: 0,
+            latitude: Number.POSITIVE_INFINITY,
+            longitude: Number.POSITIVE_INFINITY,
+            altitude: null,
+            altitudeAccuracy: null,
+            heading: null,
+            speed: null,
+        },
+    });
+    let isPaused = $state(false);
+    function updatePosition(_position) {
+        error = null;
+        position.timestamp = _position.timestamp;
+        position.coords.accuracy = _position.coords.accuracy;
+        position.coords.altitude = _position.coords.altitude;
+        position.coords.altitudeAccuracy = _position.coords.altitudeAccuracy;
+        position.coords.heading = _position.coords.heading;
+        position.coords.latitude = _position.coords.latitude;
+        position.coords.longitude = _position.coords.longitude;
+        position.coords.speed = _position.coords.speed;
+    }
+    let watcher;
+    function resume() {
+        if (!navigator)
+            return;
+        watcher = navigator.geolocation.watchPosition(updatePosition, (err) => (error = err), {
+            enableHighAccuracy,
+            maximumAge,
+            timeout,
+        });
+        isPaused = false;
+    }
+    function pause() {
+        if (watcher && navigator) {
+            navigator.geolocation.clearWatch(watcher);
+        }
+        isPaused = true;
+    }
+    $effect(() => {
+        if (immediate)
+            resume();
+        return () => pause();
+    });
+    return {
+        get isSupported() {
+            return isSupported;
+        },
+        position,
+        get error() {
+            return error;
+        },
+        get isPaused() {
+            return isPaused;
+        },
+        resume,
+        pause,
+    };
+}