Subject bar under the header in Quizzes and Lessons, synced between tabs; bidi fix for Latin math in RTL text

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/screens/QuizScreen.tsx

@@ -3,6 +3,7 @@ import { AnimatePresence, motion } from 'motion/react';
 import { Brain, Check, ChevronLeft, Coins, Compass, Flag, Heart, Infinity as InfinityIcon, Lightbulb, Ruler, Sparkles, Star, Target, ThumbsUp, X, Zap, type LucideIcon } from 'lucide-react';
 import { api, ApiError, type AnswerResult, type Hearts, type Question, type ReportReason } from '@/api';
 import { useAppData } from '@/state/AppData';
+import { fetchHome } from '@/state/subject';
 import { findNode, findNodeOfLesson, nextLessonOf, unitColor } from '@/state/curriculum';
 import { useNav } from '@/nav/Navigator';
 import { newIdempotencyKey } from '@/api/http';
@@ -449,7 +450,7 @@ function Result({
   result, total, correct, lessonId, nodeId, color, streakUp,
 }: { result: QuizResult; total: number; correct: number; lessonId?: number; nodeId?: string; color: string; streakUp: { from: number; to: number } | null }) {
   const nav = useNav();
-  const { companion } = useAppData();
+  const { companion, profile } = useAppData();
   const [loadingNext, setLoadingNext] = useState(false);
   // بعد از نتیجه، اگر زنجیره امروز روشن شد، یک صفحه‌ی جشنِ جدا (مثلِ دولینگو) و بعد مقصدِ انتخاب‌شده.
   const [streakThen, setStreakThen] = useState<(() => void) | null>(null);
@@ -468,7 +469,7 @@ function Result({
     }
     setLoadingNext(true);
     try {
-      const fresh = await api.home();
+      const fresh = await fetchHome(profile.gradeId);
       const ref = findNode(fresh, nodeId) ?? findNodeOfLesson(fresh, lessonId!);
       const next = ref ? nextLessonOf(ref.node) : null;
       if (ref && ref.node.status !== 'completed' && next != null && next !== lessonId) {