refactor(fragment): DbInspectFragment 改用嵌套 RecyclerView 展示字段，优化已删除记录视觉样式

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

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/tvField"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:textSize="10sp"
+    android:fontFamily="monospace"
+    android:gravity="start"
+    android:paddingBottom="4dp" />

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

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/cardRecord"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_marginTop="4dp"
@@ -9,13 +10,28 @@
     app:cardElevation="1dp"
     app:cardBackgroundColor="#FFFFFF">
 
-    <TextView
-        android:id="@+id/tvContent"
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:padding="10dp"
-        android:textSize="11sp"
-        android:lineSpacingMultiplier="1.3"
-        android:fontFamily="monospace" />
+        android:orientation="horizontal">
+
+        <!-- 已删除标记条：isDel=1 时显示红色左边框 -->
+        <View
+            android:id="@+id/vDelMark"
+            android:layout_width="4dp"
+            android:layout_height="match_parent"
+            android:background="#E53935"
+            android:visibility="gone" />
+
+        <!-- 字段由内层 RecyclerView（GridLayoutManager）填充 -->
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/rvFields"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:nestedScrollingEnabled="false"
+            android:padding="8dp"
+            android:clipToPadding="false" />
+
+    </LinearLayout>
 
 </androidx.cardview.widget.CardView>