Beautify main page with modern card-based layout

[Copilot]

Redesigned the main activity layout from a flat list to a structured card-based UI with proper visual hierarchy and Material Design principles.

Layout Structure

• Organized content into three elevated card sections: Header (description/warning), Repository Links, and Settings
• Replaced TableLayout with LinearLayout for simpler maintenance
• Added dividers between all settings items

Visual Design

• New color palette: background_grey (#F5F5F5), text_primary (#212121), warning_red (#D32F2F), divider_color (#E0E0E0)
• Card elevation (2dp) for depth
• Consistent 16dp padding throughout
• Text hierarchy: description (16sp), warning (14sp bold red), settings title (18sp bold)

Touch Targets

• Switch height increased from 48dp to 56dp minimum (Material Design spec)
• Proper horizontal/vertical padding (16dp/12dp)

Internationalization

• Added settings_title string to all 8 locale files (EN, ZH variants)

Files: 10 changed (activity_main.xml, colors.xml, 8 locale strings.xml)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dl.google.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.base/java.nio.charset=ALL-UNNAMED --add-opens java.base/java.net=ALL-UNNAMED --add-opens java.base/java.util.concurrent.atomic=ALL-UNNAMED -Xmx2048m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant -cp /home/REDACTED/.gradle/wrapper/dists/gradle-7.2-bin/2dnblmf4td7x66yl1d74lt32g/gradle-7.2/lib/gradle-launcher-7.2.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 7.2 (dns block)
• maven.aliyun.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.prefs/java.util.prefs=ALL-UNNAMED --add-opens java.base/java.nio.charset=ALL-UNNAMED --add-opens java.base/java.net=ALL-UNNAMED --add-opens java.base/java.util.concurrent.atomic=ALL-UNNAMED -Xmx2048m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant -cp /home/REDACTED/.gradle/wrapper/dists/gradle-7.2-bin/2dnblmf4td7x66yl1d74lt32g/gradle-7.2/lib/gradle-launcher-7.2.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 7.2 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

美化主页面，优化布局

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[Cross2pro]

 ERROR:/home/runner/work/android_virtual_cam/android_virtual_cam/app/src/main/res/layout/activity_main.xml:40: AAPT: error: attribute android:lineSpacing not found.

请处理这个错误

[chatgpt-codex-connector]

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