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/eslint-plugin-svelte/lib/rules/no-reactive-functions.js

@@ -0,0 +1,52 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const utils_1 = require("../utils");
+const compat_1 = require("../utils/compat");
+exports.default = (0, utils_1.createRule)('no-reactive-functions', {
+    meta: {
+        docs: {
+            description: "it's not necessary to define functions in reactive statements",
+            category: 'Best Practices',
+            recommended: false
+        },
+        hasSuggestions: true,
+        schema: [],
+        messages: {
+            noReactiveFns: `Do not create functions inside reactive statements unless absolutely necessary.`,
+            fixReactiveFns: `Move the function out of the reactive statement`
+        },
+        type: 'suggestion' // "problem", or "layout",
+    },
+    create(context) {
+        return {
+            // $: foo = () => { ... }
+            [`SvelteReactiveStatement > ExpressionStatement > AssignmentExpression > :function`](node) {
+                // Move upwards to include the entire label
+                const parent = node.parent?.parent?.parent;
+                if (!parent) {
+                    return false;
+                }
+                const source = (0, compat_1.getSourceCode)(context);
+                return context.report({
+                    node: parent,
+                    loc: parent.loc,
+                    messageId: 'noReactiveFns',
+                    suggest: [
+                        {
+                            messageId: 'fixReactiveFns',
+                            fix(fixer) {
+                                const tokens = source.getFirstTokens(parent, {
+                                    includeComments: false,
+                                    count: 3
+                                });
+                                const noExtraSpace = source.isSpaceBetweenTokens(tokens[1], tokens[2]);
+                                // Replace the entire reactive label with "const"
+                                return fixer.replaceTextRange([tokens[0].range[0], tokens[1].range[1]], noExtraSpace ? 'const' : 'const ');
+                            }
+                        }
+                    ]
+                });
+            }
+        };
+    }
+});