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/postcss/lib/rule.d.ts

@@ -0,0 +1,126 @@
+import Container, {
+  ContainerProps,
+  ContainerWithChildren
+} from './container.js'
+
+declare namespace Rule {
+  export interface RuleRaws extends Record<string, unknown> {
+    /**
+     * The space symbols after the last child of the node to the end of the node.
+     */
+    after?: string
+
+    /**
+     * The space symbols before the node. It also stores `*`
+     * and `_` symbols before the declaration (IE hack).
+     */
+    before?: string
+
+    /**
+     * The symbols between the selector and `{` for rules.
+     */
+    between?: string
+
+    /**
+     * Contains the text of the semicolon after this rule.
+     */
+    ownSemicolon?: string
+
+    /**
+     * The rule’s selector with comments.
+     */
+    selector?: {
+      raw: string
+      value: string
+    }
+
+    /**
+     * Contains `true` if the last child has an (optional) semicolon.
+     */
+    semicolon?: boolean
+  }
+
+  export type RuleProps = {
+    /** Information used to generate byte-to-byte equal node string as it was in the origin input. */
+    raws?: RuleRaws
+  } & (
+    | {
+        /** Selector or selectors of the rule. */
+        selector: string
+        selectors?: never
+      }
+    | {
+        selector?: never
+        /** Selectors of the rule represented as an array of strings. */
+        selectors: readonly string[]
+      }
+  ) &
+    ContainerProps
+
+  export { Rule_ as default }
+}
+
+/**
+ * Represents a CSS rule: a selector followed by a declaration block.
+ *
+ * ```js
+ * Once (root, { Rule }) {
+ *   let a = new Rule({ selector: 'a' })
+ *   a.append(…)
+ *   root.append(a)
+ * }
+ * ```
+ *
+ * ```js
+ * const root = postcss.parse('a{}')
+ * const rule = root.first
+ * rule.type       //=> 'rule'
+ * rule.toString() //=> 'a{}'
+ * ```
+ */
+declare class Rule_ extends Container {
+  nodes: NonNullable<Container['nodes']>
+  parent: ContainerWithChildren | undefined
+  raws: Rule.RuleRaws
+  type: 'rule'
+  /**
+   * The rule’s full selector represented as a string.
+   *
+   * ```js
+   * const root = postcss.parse('a, b { }')
+   * const rule = root.first
+   * rule.selector //=> 'a, b'
+   * ```
+   */
+  get selector(): string
+
+  set selector(value: string)
+  /**
+   * An array containing the rule’s individual selectors.
+   * Groups of selectors are split at commas.
+   *
+   * ```js
+   * const root = postcss.parse('a, b { }')
+   * const rule = root.first
+   *
+   * rule.selector  //=> 'a, b'
+   * rule.selectors //=> ['a', 'b']
+   *
+   * rule.selectors = ['a', 'strong']
+   * rule.selector //=> 'a, strong'
+   * ```
+   */
+  get selectors(): string[]
+
+  set selectors(values: string[])
+
+  constructor(defaults?: Rule.RuleProps)
+  assign(overrides: object | Rule.RuleProps): this
+  clone(overrides?: Partial<Rule.RuleProps>): this
+  cloneAfter(overrides?: Partial<Rule.RuleProps>): this
+  cloneBefore(overrides?: Partial<Rule.RuleProps>): this
+}
+
+declare class Rule extends Rule_ {}
+
+export = Rule