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/ajv/lib/dot/format.jst

@@ -0,0 +1,106 @@
+{{# def.definitions }}
+{{# def.errors }}
+{{# def.setupKeyword }}
+
+{{## def.skipFormat:
+  {{? $breakOnError }} if (true) { {{?}}
+  {{ return out; }}
+#}}
+
+{{? it.opts.format === false }}{{# def.skipFormat }}{{?}}
+
+
+{{# def.$data }}
+
+
+{{## def.$dataCheckFormat:
+  {{# def.$dataNotType:'string' }}
+  ({{? $unknownFormats != 'ignore' }}
+     ({{=$schemaValue}} && !{{=$format}}
+      {{? $allowUnknown }}
+        && self._opts.unknownFormats.indexOf({{=$schemaValue}}) == -1
+      {{?}}) ||
+   {{?}}
+   ({{=$format}} && {{=$formatType}} == '{{=$ruleType}}'
+                 && !(typeof {{=$format}} == 'function'
+                     ? {{? it.async}}
+                        (async{{=$lvl}} ? await {{=$format}}({{=$data}}) : {{=$format}}({{=$data}}))
+                       {{??}}
+                        {{=$format}}({{=$data}})
+                       {{?}}
+                     : {{=$format}}.test({{=$data}}))))
+#}}
+
+{{## def.checkFormat:
+  {{
+    var $formatRef = 'formats' + it.util.getProperty($schema);
+    if ($isObject) $formatRef += '.validate';
+  }}
+  {{? typeof $format == 'function' }}
+    {{=$formatRef}}({{=$data}})
+  {{??}}
+    {{=$formatRef}}.test({{=$data}})
+  {{?}}
+#}}
+
+
+{{
+  var $unknownFormats = it.opts.unknownFormats
+    , $allowUnknown = Array.isArray($unknownFormats);
+}}
+
+{{? $isData }}
+  {{
+    var $format = 'format' + $lvl
+      , $isObject = 'isObject' + $lvl
+      , $formatType = 'formatType' + $lvl;
+  }}
+  var {{=$format}} = formats[{{=$schemaValue}}];
+  var {{=$isObject}} = typeof {{=$format}} == 'object'
+                        && !({{=$format}} instanceof RegExp)
+                        && {{=$format}}.validate;
+  var {{=$formatType}} = {{=$isObject}} && {{=$format}}.type || 'string';
+  if ({{=$isObject}}) {
+    {{? it.async}}
+      var async{{=$lvl}} = {{=$format}}.async;
+    {{?}}
+    {{=$format}} = {{=$format}}.validate;
+  }
+  if ({{# def.$dataCheckFormat }}) {
+{{??}}
+  {{ var $format = it.formats[$schema]; }}
+  {{? !$format }}
+    {{? $unknownFormats == 'ignore' }}
+      {{ it.logger.warn('unknown format "' + $schema + '" ignored in schema at path "' + it.errSchemaPath + '"'); }}
+      {{# def.skipFormat }}
+    {{?? $allowUnknown && $unknownFormats.indexOf($schema) >= 0 }}
+      {{# def.skipFormat }}
+    {{??}}
+      {{ throw new Error('unknown format "' + $schema + '" is used in schema at path "' + it.errSchemaPath + '"'); }}
+    {{?}}
+  {{?}}
+  {{
+    var $isObject = typeof $format == 'object'
+                    && !($format instanceof RegExp)
+                    && $format.validate;
+    var $formatType = $isObject && $format.type || 'string';
+    if ($isObject) {
+      var $async = $format.async === true;
+      $format = $format.validate;
+    }
+  }}
+  {{? $formatType != $ruleType }}
+    {{# def.skipFormat }}
+  {{?}}
+  {{? $async }}
+    {{
+      if (!it.async) throw new Error('async format in sync schema');
+      var $formatRef = 'formats' + it.util.getProperty($schema) + '.validate';
+    }}
+    if (!(await {{=$formatRef}}({{=$data}}))) {
+  {{??}}
+    if (!{{# def.checkFormat }}) {
+  {{?}}
+{{?}}
+    {{# def.error:'format' }}
+  } {{? $breakOnError }} else { {{?}}