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-not-function-handler.js

@@ -0,0 +1,91 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const utils_1 = require("../utils");
+const ast_utils_1 = require("../utils/ast-utils");
+const PHRASES = {
+    ObjectExpression: 'object',
+    ArrayExpression: 'array',
+    ClassExpression: 'class',
+    Literal(node) {
+        if ('regex' in node) {
+            return 'regex value';
+        }
+        if ('bigint' in node) {
+            return 'bigint value';
+        }
+        if (node.value == null) {
+            return null;
+        }
+        return `${typeof node.value} value`;
+    },
+    TemplateLiteral: 'string value'
+};
+exports.default = (0, utils_1.createRule)('no-not-function-handler', {
+    meta: {
+        docs: {
+            description: 'disallow use of not function in event handler',
+            category: 'Possible Errors',
+            recommended: true
+        },
+        schema: [],
+        messages: {
+            unexpected: 'Unexpected {{phrase}} in event handler.'
+        },
+        type: 'problem' // "problem", or "layout",
+    },
+    create(context) {
+        /** Find data expression */
+        function findRootExpression(node, already = new Set()) {
+            if (node.type !== 'Identifier' || already.has(node)) {
+                return node;
+            }
+            already.add(node);
+            const variable = (0, ast_utils_1.findVariable)(context, node);
+            if (!variable || variable.defs.length !== 1) {
+                return node;
+            }
+            const def = variable.defs[0];
+            if (def.type === 'Variable') {
+                if (def.parent.kind === 'const' && def.node.init) {
+                    const init = def.node.init;
+                    return findRootExpression(init, already);
+                }
+            }
+            return node;
+        }
+        /** Verify for `on:` directive value */
+        function verify(node) {
+            if (!node) {
+                return;
+            }
+            const expression = findRootExpression(node);
+            if (expression.type !== 'ObjectExpression' &&
+                expression.type !== 'ArrayExpression' &&
+                expression.type !== 'ClassExpression' &&
+                expression.type !== 'Literal' &&
+                expression.type !== 'TemplateLiteral') {
+                return;
+            }
+            const phraseValue = PHRASES[expression.type];
+            const phrase = typeof phraseValue === 'function' ? phraseValue(expression) : phraseValue;
+            if (phrase == null) {
+                return;
+            }
+            context.report({
+                node,
+                messageId: 'unexpected',
+                data: {
+                    phrase
+                }
+            });
+        }
+        return {
+            SvelteDirective(node) {
+                if (node.kind !== 'EventHandler') {
+                    return;
+                }
+                verify(node.expression);
+            }
+        };
+    }
+});