Fix Heute bootstrap redirect and German onboarding voices

When Kokoro lists no locale-matched voices, onboarding now uses offline
presets instead of showing English-only options. Shell bootstrap skips
bot redirects while the user is on /app/heute.

Co-authored-by: cynarAI <cynarAI@users.noreply.github.com>

apps/web/e2e/first-run-onboarding-ux.spec.ts

@@ -52,7 +52,7 @@ test("German voice step lists German voices after choosing Deutsch", async ({ pa
   const germanVoice = page.getByRole("button", { name: /^(Eva|Bernd)$/i });
   await expect(germanVoice.first()).toBeVisible({ timeout: 30_000 });
   await expect(page.getByRole("button", { name: "Alloy", exact: true })).toHaveCount(0);
-  await expect(germanVoice.filter({ has: page.locator('[aria-pressed="true"]') }).first()).toBeVisible();
+  await expect(page.getByRole("button", { name: /^(Eva|Bernd)$/i, pressed: true })).toBeVisible();
 });
 
 test("main conversation does not show a group subtitle for one Oo", async ({ page }) => {

apps/web/src/components/onboarding/OnboardingVoiceStep.tsx

@@ -1,9 +1,12 @@
 import { Trans } from "@lingui/react/macro";
 import type { VoiceInfo } from "@rakazo/contracts";
-import { voicesForLocale } from "@rakazo/core";
 import { Button } from "@rakazo/ui-web";
 import { useEffect, useRef, useState } from "react";
-import { defaultOnboardingVoiceId, offlineOnboardingVoices } from "../../lib/onboarding-voices";
+import {
+  defaultOnboardingVoiceId,
+  offlineOnboardingVoices,
+  onboardingVoicesFromList,
+} from "../../lib/onboarding-voices";
 import { rpc } from "../../lib/rpc";
 import type { UiLocale } from "../../lib/ui-locale";
 
@@ -39,7 +42,7 @@ export function OnboardingVoiceStep({
         await rpc.voice.connect({ provider: "kokoro", apiKey: KOKORO_LOCAL_TOKEN });
         const listed = await rpc.voice.voices({ provider: "kokoro" });
         if (cancelled) return;
-        const ordered = voicesForLocale(listed, uiLocale).slice(0, 6);
+        const ordered = onboardingVoicesFromList(listed, uiLocale);
         setVoiceOptions(ordered);
         const nextId = defaultOnboardingVoiceId(uiLocale, ordered);
         if (nextId) onSelectedVoiceIdChange(nextId);

apps/web/src/lib/onboarding-voices.test.ts

@@ -1,5 +1,9 @@
 import { describe, expect, it } from "vitest";
-import { defaultOnboardingVoiceId, offlineOnboardingVoices } from "./onboarding-voices.js";
+import {
+  defaultOnboardingVoiceId,
+  offlineOnboardingVoices,
+  onboardingVoicesFromList,
+} from "./onboarding-voices.js";
 
 describe("offlineOnboardingVoices", () => {
   it("offers German voices for de", () => {
@@ -18,6 +22,18 @@ describe("offlineOnboardingVoices", () => {
   });
 });
 
+describe("onboardingVoicesFromList", () => {
+  it("uses offline German presets when the server only lists English voices", () => {
+    const englishOnly = [{ id: "af_alloy", label: "Alloy", description: "neutral" }];
+    expect(onboardingVoicesFromList(englishOnly, "de").map((voice) => voice.id)).toEqual([
+      "df_eva",
+      "dm_bernd",
+      "df_victoria",
+      "dm_martin",
+    ]);
+  });
+});
+
 describe("defaultOnboardingVoiceId", () => {
   it("prefers df_eva for German", () => {
     expect(defaultOnboardingVoiceId("de", offlineOnboardingVoices("de"))).toBe("df_eva");

apps/web/src/lib/onboarding-voices.ts

@@ -13,11 +13,41 @@ const ENGLISH_ONBOARDING_VOICES: VoiceInfo[] = [
 
 const OFFLINE_CATALOG = [...GERMAN_VOICE_PRESETS, ...ENGLISH_ONBOARDING_VOICES];
 
+const KOKORO_LANGUAGE_PREFIXES: Record<string, string> = {
+  de: "d",
+  en: "ab",
+  es: "e",
+  fr: "f",
+  hi: "h",
+  it: "i",
+  ja: "j",
+  pt: "p",
+  zh: "z",
+};
+
+function listedVoicesSpeakLocale(listed: VoiceInfo[], locale: string): boolean {
+  const language = locale.toLowerCase().split("-")[0] ?? "";
+  const prefixes = KOKORO_LANGUAGE_PREFIXES[language];
+  if (!prefixes) return listed.length > 0;
+  return listed.some((voice) => {
+    const prefix = /^([a-z])[fm]_/.exec(voice.id)?.[1];
+    return Boolean(prefix && prefixes.includes(prefix));
+  });
+}
+
 /** Locale-aware voice choices for onboarding when listing from the server fails. */
 export function offlineOnboardingVoices(locale: string): VoiceInfo[] {
   return voicesForLocale(OFFLINE_CATALOG, locale).slice(0, 6);
 }
 
+/** Prefer server voices that speak the UI language; otherwise use offline presets. */
+export function onboardingVoicesFromList(listed: VoiceInfo[], locale: string): VoiceInfo[] {
+  if (listedVoicesSpeakLocale(listed, locale)) {
+    return voicesForLocale(listed, locale).slice(0, 6);
+  }
+  return offlineOnboardingVoices(locale);
+}
+
 export function defaultOnboardingVoiceId(locale: string, voices: VoiceInfo[]): string {
   return defaultVoiceForLocale(voices, locale)?.id ?? "";
 }

apps/web/src/pages/Shell.tsx

@@ -1004,9 +1004,11 @@ export function ShellPage() {
           return;
         }
         if (inProject && !botId) {
+          if (routeOnHeute.current) return;
           navigate(firstThreadRoute(bootstrap.bots, groupList, true), { replace: true });
           return;
         }
+        if (routeOnHeute.current) return;
         const selectedBotId = bootstrap.thread?.botId ?? bootstrap.bots[0]?.id;
         if (selectedBotId && selectedBotId !== botId) {
           navigate(`/app/${selectedBotId}`, { replace: true });