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-dupe-style-properties.js

@@ -0,0 +1,91 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const utils_1 = require("../utils");
+const css_utils_1 = require("../utils/css-utils");
+exports.default = (0, utils_1.createRule)('no-dupe-style-properties', {
+    meta: {
+        docs: {
+            description: 'disallow duplicate style properties',
+            category: 'Possible Errors',
+            recommended: true
+        },
+        schema: [],
+        messages: {
+            unexpected: "Duplicate property '{{name}}'."
+        },
+        type: 'problem'
+    },
+    create(context) {
+        return {
+            SvelteStartTag(node) {
+                const reported = new Set();
+                const beforeDeclarations = new Map();
+                for (const { decls } of iterateStyleDeclSetFromAttrs(node.attributes)) {
+                    for (const decl of decls) {
+                        const already = beforeDeclarations.get(decl.prop);
+                        if (already) {
+                            for (const report of [already, decl].filter((n) => !reported.has(n))) {
+                                context.report({
+                                    node,
+                                    loc: report.loc,
+                                    messageId: 'unexpected',
+                                    data: { name: report.prop }
+                                });
+                                reported.add(report);
+                            }
+                        }
+                    }
+                    for (const decl of decls) {
+                        beforeDeclarations.set(decl.prop, decl);
+                    }
+                }
+            }
+        };
+        /** Iterate the style decl set from attrs */
+        function* iterateStyleDeclSetFromAttrs(attrs) {
+            for (const attr of attrs) {
+                if (attr.type === 'SvelteStyleDirective') {
+                    yield {
+                        decls: [{ prop: attr.key.name.name, loc: attr.key.name.loc }]
+                    };
+                }
+                else if (attr.type === 'SvelteAttribute') {
+                    if (attr.key.name !== 'style') {
+                        continue;
+                    }
+                    const root = (0, css_utils_1.parseStyleAttributeValue)(attr, context);
+                    if (!root) {
+                        continue;
+                    }
+                    yield* iterateStyleDeclSetFromStyleRoot(root);
+                }
+            }
+        }
+        /** Iterate the style decl set from style root */
+        function* iterateStyleDeclSetFromStyleRoot(root) {
+            for (const child of root.nodes) {
+                if (child.type === 'decl') {
+                    yield {
+                        decls: [
+                            {
+                                prop: child.prop.name,
+                                get loc() {
+                                    return child.prop.loc;
+                                }
+                            }
+                        ]
+                    };
+                }
+                else if (child.type === 'inline') {
+                    const decls = [];
+                    for (const root of child.getAllInlineStyles().values()) {
+                        for (const set of iterateStyleDeclSetFromStyleRoot(root)) {
+                            decls.push(...set.decls);
+                        }
+                    }
+                    yield { decls };
+                }
+            }
+        }
+    }
+});