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/iconv-lite/encodings/index.js

@@ -0,0 +1,23 @@
+"use strict";
+
+// Update this array if you add/rename/remove files in this directory.
+// We support Browserify by skipping automatic module discovery and requiring modules directly.
+var modules = [
+    require("./internal"),
+    require("./utf32"),
+    require("./utf16"),
+    require("./utf7"),
+    require("./sbcs-codec"),
+    require("./sbcs-data"),
+    require("./sbcs-data-generated"),
+    require("./dbcs-codec"),
+    require("./dbcs-data"),
+];
+
+// Put all encoding/alias/codec definitions to single object and export it.
+for (var i = 0; i < modules.length; i++) {
+    var module = modules[i];
+    for (var enc in module)
+        if (Object.prototype.hasOwnProperty.call(module, enc))
+            exports[enc] = module[enc];
+}