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/svelte-toolbelt/dist/utils/strings.js

@@ -0,0 +1,70 @@
+const NUMBER_CHAR_RE = /\d/;
+const STR_SPLITTERS = ["-", "_", "/", "."];
+function isUppercase(char = "") {
+    if (NUMBER_CHAR_RE.test(char))
+        return undefined;
+    return char !== char.toLowerCase();
+}
+function splitByCase(str) {
+    const parts = [];
+    let buff = "";
+    let previousUpper;
+    let previousSplitter;
+    for (const char of str) {
+        // Splitter
+        const isSplitter = STR_SPLITTERS.includes(char);
+        if (isSplitter === true) {
+            parts.push(buff);
+            buff = "";
+            previousUpper = undefined;
+            continue;
+        }
+        const isUpper = isUppercase(char);
+        if (previousSplitter === false) {
+            // Case rising edge
+            if (previousUpper === false && isUpper === true) {
+                parts.push(buff);
+                buff = char;
+                previousUpper = isUpper;
+                continue;
+            }
+            // Case falling edge
+            if (previousUpper === true && isUpper === false && buff.length > 1) {
+                const lastChar = buff.at(-1);
+                parts.push(buff.slice(0, Math.max(0, buff.length - 1)));
+                buff = lastChar + char;
+                previousUpper = isUpper;
+                continue;
+            }
+        }
+        // Normal char
+        buff += char;
+        previousUpper = isUpper;
+        previousSplitter = isSplitter;
+    }
+    parts.push(buff);
+    return parts;
+}
+export function pascalCase(str) {
+    if (!str)
+        return "";
+    return splitByCase(str)
+        .map((p) => upperFirst(p))
+        .join("");
+}
+export function camelCase(str) {
+    return lowerFirst(pascalCase(str || ""));
+}
+export function kebabCase(str) {
+    return str
+        ? splitByCase(str)
+            .map((p) => p.toLowerCase())
+            .join("-")
+        : "";
+}
+function upperFirst(str) {
+    return str ? str[0].toUpperCase() + str.slice(1) : "";
+}
+function lowerFirst(str) {
+    return str ? str[0].toLowerCase() + str.slice(1) : "";
+}