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/entities/dist/esm/encode.js

@@ -0,0 +1,69 @@
+import { htmlTrie } from "./generated/encode-html.js";
+import { xmlReplacer, getCodePoint } from "./escape.js";
+const htmlReplacer = /[\t\n\f!-,./:-@[-`{-}\u0080-\uFFFF]/g;
+/**
+ * Encodes all characters in the input using HTML entities. This includes
+ * characters that are valid ASCII characters in HTML documents, such as `#`.
+ *
+ * To get a more compact output, consider using the `encodeNonAsciiHTML`
+ * function, which will only encode characters that are not valid in HTML
+ * documents, as well as non-ASCII characters.
+ *
+ * If a character has no equivalent entity, a numeric hexadecimal reference
+ * (eg. `ü`) will be used.
+ */
+export function encodeHTML(input) {
+    return encodeHTMLTrieRe(htmlReplacer, input);
+}
+/**
+ * Encodes all non-ASCII characters, as well as characters not valid in HTML
+ * documents using HTML entities. This function will not encode characters that
+ * are valid in HTML documents, such as `#`.
+ *
+ * If a character has no equivalent entity, a numeric hexadecimal reference
+ * (eg. `ü`) will be used.
+ */
+export function encodeNonAsciiHTML(input) {
+    return encodeHTMLTrieRe(xmlReplacer, input);
+}
+function encodeHTMLTrieRe(regExp, input) {
+    let returnValue = "";
+    let lastIndex = 0;
+    let match;
+    while ((match = regExp.exec(input)) !== null) {
+        const { index } = match;
+        returnValue += input.substring(lastIndex, index);
+        const char = input.charCodeAt(index);
+        let next = htmlTrie.get(char);
+        if (typeof next === "object") {
+            // We are in a branch. Try to match the next char.
+            if (index + 1 < input.length) {
+                const nextChar = input.charCodeAt(index + 1);
+                const value = typeof next.n === "number"
+                    ? next.n === nextChar
+                        ? next.o
+                        : undefined
+                    : next.n.get(nextChar);
+                if (value !== undefined) {
+                    returnValue += value;
+                    lastIndex = regExp.lastIndex += 1;
+                    continue;
+                }
+            }
+            next = next.v;
+        }
+        // We might have a tree node without a value; skip and use a numeric entity.
+        if (next === undefined) {
+            const cp = getCodePoint(input, index);
+            returnValue += `&#x${cp.toString(16)};`;
+            // Increase by 1 if we have a surrogate pair
+            lastIndex = regExp.lastIndex += Number(cp !== char);
+        }
+        else {
+            returnValue += next;
+            lastIndex = index + 1;
+        }
+    }
+    return returnValue + input.substr(lastIndex);
+}
+//# sourceMappingURL=encode.js.map