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/valid-compile.js

@@ -0,0 +1,79 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const utils_1 = require("../utils");
+const svelte_compile_warns_1 = require("../shared/svelte-compile-warns");
+const compat_1 = require("../utils/compat");
+exports.default = (0, utils_1.createRule)('valid-compile', {
+    meta: {
+        docs: {
+            description: 'disallow warnings when compiling.',
+            category: 'Possible Errors',
+            recommended: true
+        },
+        schema: [
+            {
+                type: 'object',
+                properties: {
+                    ignoreWarnings: { type: 'boolean' }
+                },
+                additionalProperties: false
+            }
+        ],
+        messages: {},
+        type: 'problem'
+    },
+    create(context) {
+        const sourceCode = (0, compat_1.getSourceCode)(context);
+        if (!sourceCode.parserServices.isSvelte) {
+            return {};
+        }
+        const onwarn = sourceCode.parserServices.svelteParseContext?.svelteConfig?.onwarn;
+        const transform = onwarn
+            ? (warning) => {
+                if (!warning.code)
+                    return warning;
+                let result = null;
+                onwarn(warning, (reportWarn) => (result = reportWarn));
+                return result;
+            }
+            : (warning) => warning;
+        const ignoreWarnings = Boolean(context.options[0]?.ignoreWarnings);
+        const ignores = [
+            'missing-declaration',
+            // Svelte v4
+            'dynamic-slot-name',
+            // Svelte v5
+            'invalid-slot-name'
+        ];
+        /**
+         * report
+         */
+        function report({ warnings, kind }) {
+            for (const warn of warnings) {
+                if (warn.code && ignores.includes(warn.code)) {
+                    continue;
+                }
+                const reportWarn = kind === 'warn' ? transform(warn) : warn;
+                if (!reportWarn) {
+                    continue;
+                }
+                context.report({
+                    loc: {
+                        start: reportWarn.start || reportWarn.end || { line: 1, column: 0 },
+                        end: reportWarn.end || reportWarn.start || { line: 1, column: 0 }
+                    },
+                    message: `${reportWarn.message}${reportWarn.code ? `(${reportWarn.code})` : ''}`
+                });
+            }
+        }
+        return {
+            'Program:exit'() {
+                const result = (0, svelte_compile_warns_1.getSvelteCompileWarnings)(context);
+                if (ignoreWarnings && result.kind === 'warn') {
+                    return;
+                }
+                report(result);
+            }
+        };
+    }
+});