feat(medications): 简化药品添加流程并优化AI相机交互体验

- 移除药品添加选项底部抽屉,直接跳转至AI识别相机
- 优化AI相机拍摄完成后的按钮交互,展开为"拍照"和"完成"两个按钮
- 添加相机引导提示本地存储,避免重复显示
- 修复相机页面布局跳动问题,固定相机高度
- 为医疗免责声明组件添加触觉反馈错误处理
- 实现活动热力图的国际化支持,包括月份标签和统计文本

app/(tabs)/medications.tsx

@@ -1,6 +1,5 @@
 import CelebrationAnimation, { CelebrationAnimationRef } from '@/components/CelebrationAnimation';
 import { DateSelector } from '@/components/DateSelector';
-import { MedicationAddOptionsSheet } from '@/components/medication/MedicationAddOptionsSheet';
 import { MedicationCard } from '@/components/medication/MedicationCard';
 import { TakenMedicationsStack } from '@/components/medication/TakenMedicationsStack';
 import { ThemedText } from '@/components/ThemedText';
@@ -59,7 +58,6 @@ export default function MedicationsScreen() {
   const celebrationTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
   const [isCelebrationVisible, setIsCelebrationVisible] = useState(false);
   const [disclaimerVisible, setDisclaimerVisible] = useState(false);
-  const [addSheetVisible, setAddSheetVisible] = useState(false);
   const [pendingAction, setPendingAction] = useState<'manual' | null>(null);
 
   // 从 Redux 获取数据
@@ -72,37 +70,34 @@ export default function MedicationsScreen() {
   );
   const medicationsForDay = useAppSelector(medicationSelector);
 
-  const handleOpenAddSheet = useCallback(() => {
-    setAddSheetVisible(true);
-  }, []);
-
-  const handleManualAdd = useCallback(() => {
-    const hasRead = getItemSync(MEDICAL_DISCLAIMER_READ_KEY);
-    setPendingAction('manual');
-
-    if (hasRead === 'true') {
-      setAddSheetVisible(false);
-      setPendingAction(null);
-      router.push('/medications/add-medication');
-    } else {
-      setAddSheetVisible(false);
-      setDisclaimerVisible(true);
-    }
-  }, []);
-
-  const handleAiRecognize = useCallback(async () => {
-    setAddSheetVisible(false);
+  // 直接跳转到 AI 相机页面
+  const handleAddMedication = useCallback(async () => {
+    // 先检查登录状态
     const isLoggedIn = await ensureLoggedIn();
     if (!isLoggedIn) return;
 
+    // 检查 VIP 权限
     const access = checkServiceAccess();
     if (!access.canUseService) {
       openMembershipModal();
       return;
     }
 
+    // 直接跳转到 AI 相机页面
     router.push('/medications/ai-camera');
-  }, [checkServiceAccess, ensureLoggedIn, openMembershipModal, router]);
+  }, [checkServiceAccess, ensureLoggedIn, openMembershipModal]);
+
+  const handleManualAdd = useCallback(() => {
+    const hasRead = getItemSync(MEDICAL_DISCLAIMER_READ_KEY);
+    setPendingAction('manual');
+
+    if (hasRead === 'true') {
+      setPendingAction(null);
+      router.push('/medications/add-medication');
+    } else {
+      setDisclaimerVisible(true);
+    }
+  }, []);
 
   const handleDisclaimerConfirm = useCallback(() => {
     // 用户同意免责声明后，记录已读状态，关闭弹窗并跳转到添加页面
@@ -308,7 +303,7 @@ export default function MedicationsScreen() {
 
             <TouchableOpacity
               activeOpacity={0.7}
-              onPress={handleOpenAddSheet}
+              onPress={handleAddMedication}
             >
               {isLiquidGlassAvailable() ? (
                 <GlassView
@@ -425,13 +420,6 @@ export default function MedicationsScreen() {
         )}
       </ScrollView>
 
-      <MedicationAddOptionsSheet
-        visible={addSheetVisible}
-        onClose={() => setAddSheetVisible(false)}
-        onManualAdd={handleManualAdd}
-        onAiRecognize={handleAiRecognize}
-      />
-
       {/* 医疗免责声明弹窗 */}
       <MedicalDisclaimerSheet
         visible={disclaimerVisible}