fix: patch scaffold URL parser to support self-hosted Gitea (.eu TLD)

zotero-plugin-scaffold hardcodes a .com-only regex in parseRepoUrl,
causing build failures with non-.com repository URLs. Add:
- scripts/patch-scaffold.mjs: postinstall script that fixes the regex
- zotero-plugin.config.ts: explicit xpiDownloadLink and updateURL
  so scaffold generates correct update.json without relying on the parser

scripts/patch-scaffold.mjs

@@ -0,0 +1,45 @@
+/**
+ * Patches zotero-plugin-scaffold's parseRepoUrl to accept non-.com domains.
+ *
+ * The upstream regex hardcodes `.com` in the URL pattern, which breaks builds
+ * when the repository is hosted on a self-hosted Gitea instance (any other TLD).
+ * This script runs automatically via the `postinstall` npm hook after every
+ * `npm install` / `npm ci`.
+ */
+
+import { readFileSync, writeFileSync } from "fs";
+import { resolve, dirname } from "path";
+import { fileURLToPath } from "url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const target = resolve(
+  __dirname,
+  "../node_modules/zotero-plugin-scaffold/dist/shared/zotero-plugin-scaffold.Lk5EW_9z.mjs"
+);
+
+let content;
+try {
+  content = readFileSync(target, "utf8");
+} catch {
+  console.warn("[patch-scaffold] Target file not found, skipping patch.");
+  process.exit(0);
+}
+
+// Original: matches only .com hosts
+// /:\/\/.+com\/([^/]+)\/([^.]+)\.git$/
+// Replacement: matches any host and makes .git suffix optional
+// /:\/\/.+?\/([^/]+)\/([^/.]+)(?:\.git)?$/
+const SEARCH = String.raw`url.match(/:\/\/.+com\/([^/]+)\/([^.]+)\.git$/)`;
+const REPLACE = String.raw`url.match(/:\/\/.+?\/([^/]+)\/([^/.]+)(?:\.git)?$/)`;
+
+if (content.includes(SEARCH)) {
+  writeFileSync(target, content.replace(SEARCH, REPLACE), "utf8");
+  console.log("[patch-scaffold] Applied: parseRepoUrl now accepts any TLD.");
+} else if (content.includes(REPLACE)) {
+  console.log("[patch-scaffold] Already patched, nothing to do.");
+} else {
+  console.warn(
+    "[patch-scaffold] Could not find target string — scaffold may have been updated. " +
+      "Check scripts/patch-scaffold.mjs and update SEARCH/REPLACE strings."
+  );
+}