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/yaml/browser/dist/stringify/stringifyCollection.js

@@ -0,0 +1,153 @@
+import { isNode, isPair } from '../nodes/identity.js';
+import { stringify } from './stringify.js';
+import { lineComment, indentComment } from './stringifyComment.js';
+
+function stringifyCollection(collection, ctx, options) {
+    const flow = ctx.inFlow ?? collection.flow;
+    const stringify = flow ? stringifyFlowCollection : stringifyBlockCollection;
+    return stringify(collection, ctx, options);
+}
+function stringifyBlockCollection({ comment, items }, ctx, { blockItemPrefix, flowChars, itemIndent, onChompKeep, onComment }) {
+    const { indent, options: { commentString } } = ctx;
+    const itemCtx = Object.assign({}, ctx, { indent: itemIndent, type: null });
+    let chompKeep = false; // flag for the preceding node's status
+    const lines = [];
+    for (let i = 0; i < items.length; ++i) {
+        const item = items[i];
+        let comment = null;
+        if (isNode(item)) {
+            if (!chompKeep && item.spaceBefore)
+                lines.push('');
+            addCommentBefore(ctx, lines, item.commentBefore, chompKeep);
+            if (item.comment)
+                comment = item.comment;
+        }
+        else if (isPair(item)) {
+            const ik = isNode(item.key) ? item.key : null;
+            if (ik) {
+                if (!chompKeep && ik.spaceBefore)
+                    lines.push('');
+                addCommentBefore(ctx, lines, ik.commentBefore, chompKeep);
+            }
+        }
+        chompKeep = false;
+        let str = stringify(item, itemCtx, () => (comment = null), () => (chompKeep = true));
+        if (comment)
+            str += lineComment(str, itemIndent, commentString(comment));
+        if (chompKeep && comment)
+            chompKeep = false;
+        lines.push(blockItemPrefix + str);
+    }
+    let str;
+    if (lines.length === 0) {
+        str = flowChars.start + flowChars.end;
+    }
+    else {
+        str = lines[0];
+        for (let i = 1; i < lines.length; ++i) {
+            const line = lines[i];
+            str += line ? `\n${indent}${line}` : '\n';
+        }
+    }
+    if (comment) {
+        str += '\n' + indentComment(commentString(comment), indent);
+        if (onComment)
+            onComment();
+    }
+    else if (chompKeep && onChompKeep)
+        onChompKeep();
+    return str;
+}
+function stringifyFlowCollection({ items }, ctx, { flowChars, itemIndent }) {
+    const { indent, indentStep, flowCollectionPadding: fcPadding, options: { commentString } } = ctx;
+    itemIndent += indentStep;
+    const itemCtx = Object.assign({}, ctx, {
+        indent: itemIndent,
+        inFlow: true,
+        type: null
+    });
+    let reqNewline = false;
+    let linesAtValue = 0;
+    const lines = [];
+    for (let i = 0; i < items.length; ++i) {
+        const item = items[i];
+        let comment = null;
+        if (isNode(item)) {
+            if (item.spaceBefore)
+                lines.push('');
+            addCommentBefore(ctx, lines, item.commentBefore, false);
+            if (item.comment)
+                comment = item.comment;
+        }
+        else if (isPair(item)) {
+            const ik = isNode(item.key) ? item.key : null;
+            if (ik) {
+                if (ik.spaceBefore)
+                    lines.push('');
+                addCommentBefore(ctx, lines, ik.commentBefore, false);
+                if (ik.comment)
+                    reqNewline = true;
+            }
+            const iv = isNode(item.value) ? item.value : null;
+            if (iv) {
+                if (iv.comment)
+                    comment = iv.comment;
+                if (iv.commentBefore)
+                    reqNewline = true;
+            }
+            else if (item.value == null && ik?.comment) {
+                comment = ik.comment;
+            }
+        }
+        if (comment)
+            reqNewline = true;
+        let str = stringify(item, itemCtx, () => (comment = null));
+        reqNewline || (reqNewline = lines.length > linesAtValue || str.includes('\n'));
+        if (i < items.length - 1) {
+            str += ',';
+        }
+        else if (ctx.options.trailingComma) {
+            if (ctx.options.lineWidth > 0) {
+                reqNewline || (reqNewline = lines.reduce((sum, line) => sum + line.length + 2, 2) +
+                    (str.length + 2) >
+                    ctx.options.lineWidth);
+            }
+            if (reqNewline) {
+                str += ',';
+            }
+        }
+        if (comment)
+            str += lineComment(str, itemIndent, commentString(comment));
+        lines.push(str);
+        linesAtValue = lines.length;
+    }
+    const { start, end } = flowChars;
+    if (lines.length === 0) {
+        return start + end;
+    }
+    else {
+        if (!reqNewline) {
+            const len = lines.reduce((sum, line) => sum + line.length + 2, 2);
+            reqNewline = ctx.options.lineWidth > 0 && len > ctx.options.lineWidth;
+        }
+        if (reqNewline) {
+            let str = start;
+            for (const line of lines)
+                str += line ? `\n${indentStep}${indent}${line}` : '\n';
+            return `${str}\n${indent}${end}`;
+        }
+        else {
+            return `${start}${fcPadding}${lines.join(' ')}${fcPadding}${end}`;
+        }
+    }
+}
+function addCommentBefore({ indent, options: { commentString } }, lines, comment, chompKeep) {
+    if (comment && chompKeep)
+        comment = comment.replace(/^\n+/, '');
+    if (comment) {
+        const ic = indentComment(commentString(comment), indent);
+        lines.push(ic.trimStart()); // Avoid double indent on first line
+    }
+}
+
+export { stringifyCollection };