[FIX] 移除 origin/ui 帶入的 UTF-8 BOM（aapt2 無法解析導致打包失敗）

設計師端編輯器在 3 個 XML 開頭寫入 UTF-8 BOM，aapt2 報
「Cannot read field elmName because root is null」。移除 BOM 後 S12XYU/S9XYU
Debug 皆可正常打包。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/src/main/res/drawable/bg_button_outline.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
     <!-- 背景透明 -->

app/src/main/res/drawable/bg_input_modern.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
     <solid android:color="@color/cardSurface" />
     <stroke android:width="1.5dp" android:color="@color/gray" />

app/src/main/res/layout/dialog_cmuh_take_medicine.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"