fix(home): 修正搜索栏布局及Tab样式细节

搜索框从EditText改为TextView入口，搜索按钮改为主题色圆角按钮，
Tab文字颜色统一引用子Tab专用选择器，drawable颜色引用修正为主题色。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <!--    选中状态-->
-    <item android:drawable="@drawable/bg_white_background_shap" android:state_checked="true"/>
-    <item android:drawable="@drawable/bg_white_background_shap" android:state_selected="true"/>
+    <item android:drawable="@color/theme_color" android:state_checked="true"/>
+    <item android:drawable="@color/theme_color" android:state_selected="true"/>
     <!--    默认状态-->
-    <item android:drawable="@drawable/bg_action_grey_radius5"/>
+    <item android:drawable="@color/text_black_60"/>
 </selector>

app/src/main/res/drawable/bg_theme_background_shape3.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
-    <solid android:color="?attr/colorPrimary" />
+    <solid android:color="@color/theme_color" />
     <corners android:radius="3dp" />
 </shape>