chore: sentry and nextjs major bumps (#633)

* chore: remove nextjs-config

* build fix

* sentry update

* nextjs update

* feature flags doc

* update readme

* explicit nextjs env vars + remove feature-unrelated things and obsolete vars from config

* full config removal

* remove force-dynamic from pages

* compile fix

* restore claude-deleted tests

* no sentry backward compat

* better .env.example

* AUTHENTIK_REFRESH_TOKEN_URL not so required

* accommodate auth system to requiredLogin feature

---------

Co-authored-by: Igor Loskutov <igor.loskutoff@gmail.com>

www/app/lib/errorUtils.ts

@@ -1,4 +1,6 @@
-function shouldShowError(error: Error | null | undefined) {
+import { isNonEmptyArray, NonEmptyArray } from "./array";
+
+export function shouldShowError(error: Error | null | undefined) {
   if (
     error?.name == "ResponseError" &&
     (error["response"].status == 404 || error["response"].status == 403)
@@ -8,4 +10,40 @@ function shouldShowError(error: Error | null | undefined) {
   return true;
 }
 
-export { shouldShowError };
+const defaultMergeErrors = (ex: NonEmptyArray<unknown>): unknown => {
+  try {
+    return new Error(
+      ex
+        .map((e) =>
+          e ? (e.toString ? e.toString() : JSON.stringify(e)) : `${e}`,
+        )
+        .join("\n"),
+    );
+  } catch (e) {
+    console.error("Error merging errors:", e);
+    return ex[0];
+  }
+};
+
+type ReturnTypes<T extends readonly (() => any)[]> = {
+  [K in keyof T]: T[K] extends () => infer R ? R : never;
+};
+
+// sequence semantic for "throws"
+// calls functions passed and collects its thrown values
+export function sequenceThrows<Fns extends readonly (() => any)[]>(
+  ...fs: Fns
+): ReturnTypes<Fns> {
+  const results: unknown[] = [];
+  const errors: unknown[] = [];
+
+  for (const f of fs) {
+    try {
+      results.push(f());
+    } catch (e) {
+      errors.push(e);
+    }
+  }
+  if (errors.length) throw defaultMergeErrors(errors as NonEmptyArray<unknown>);
+  return results as ReturnTypes<Fns>;
+}