Monorepo: consolidate 7 repos into one

Combines shared, blog, market, cart, events, federation, and account
into a single repository. Eliminates submodule sync, sibling model
copying at build time, and per-app CI orchestration.

Changes:
- Remove per-app .git, .gitmodules, .gitea, submodule shared/ dirs
- Remove stale sibling model copies from each app
- Update all 6 Dockerfiles for monorepo build context (root = .)
- Add build directives to docker-compose.yml
- Add single .gitea/workflows/ci.yml with change detection
- Add .dockerignore for monorepo build context
- Create __init__.py for federation and account (cross-app imports)

shared/editor/src/Editor.jsx

@@ -0,0 +1,81 @@
+import { useMemo, useState, useEffect, useCallback } from "react";
+import { KoenigComposer, KoenigEditor, CardMenuPlugin } from "@tryghost/koenig-lexical";
+import "koenig-styles";
+import makeFileUploader from "./useFileUpload";
+
+export default function Editor({ initialState, onChange, csrfToken, uploadUrls, oembedUrl, unsplashApiKey, snippetsUrl }) {
+  const fileUploader = useMemo(() => makeFileUploader(csrfToken, uploadUrls), [csrfToken, uploadUrls]);
+
+  const [snippets, setSnippets] = useState([]);
+
+  useEffect(() => {
+    if (!snippetsUrl) return;
+    fetch(snippetsUrl, { headers: { "X-CSRFToken": csrfToken || "" } })
+      .then((r) => r.ok ? r.json() : [])
+      .then(setSnippets)
+      .catch(() => {});
+  }, [snippetsUrl, csrfToken]);
+
+  const createSnippet = useCallback(async ({ name, value }) => {
+    if (!snippetsUrl) return;
+    const resp = await fetch(snippetsUrl, {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+        "X-CSRFToken": csrfToken || "",
+      },
+      body: JSON.stringify({ name, value: JSON.stringify(value) }),
+    });
+    if (!resp.ok) return;
+    const created = await resp.json();
+    setSnippets((prev) => {
+      const idx = prev.findIndex((s) => s.name === created.name);
+      if (idx >= 0) {
+        const next = [...prev];
+        next[idx] = created;
+        return next;
+      }
+      return [...prev, created].sort((a, b) => a.name.localeCompare(b.name));
+    });
+  }, [snippetsUrl, csrfToken]);
+
+  const cardConfig = useMemo(() => ({
+    fetchEmbed: async (url, { type } = {}) => {
+      const params = new URLSearchParams({ url });
+      if (type) params.set("type", type);
+      const resp = await fetch(`${oembedUrl}?${params}`, {
+        headers: { "X-CSRFToken": csrfToken || "" },
+      });
+      if (!resp.ok) return {};
+      return resp.json();
+    },
+    unsplash: unsplashApiKey
+      ? { defaultHeaders: { Authorization: `Client-ID ${unsplashApiKey}` } }
+      : false,
+    membersEnabled: true,
+    snippets: snippets.map((s) => ({
+      id: s.id,
+      name: s.name,
+      value: typeof s.value === "string" ? JSON.parse(s.value) : s.value,
+    })),
+    createSnippet,
+  }), [oembedUrl, csrfToken, unsplashApiKey, snippets, createSnippet]);
+
+  return (
+    <KoenigComposer
+      initialEditorState={initialState || undefined}
+      fileUploader={fileUploader}
+      cardConfig={cardConfig}
+    >
+      <KoenigEditor
+        onChange={(serializedState) => {
+          if (onChange) {
+            onChange(JSON.stringify(serializedState));
+          }
+        }}
+      >
+        <CardMenuPlugin />
+      </KoenigEditor>
+    </KoenigComposer>
+  );
+}