fix: change section title color from bodyText to primaryText for better visibility

- Updated SectionTitleView to use primaryText color instead of bodyText
- Improves visibility of section titles in Explore page
- Affects all section headers including "今日热议", "最热节点", "新增节点", and "节点导航"

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: graycreate

V2er/View/Widget/SectionTitleView.swift

@@ -25,7 +25,7 @@ struct SectionTitleView: View {
         Text(title)
             .font(style == .normal ? .headline : .subheadline)
             .fontWeight(.heavy)
-            .foregroundColor(.bodyText)
+            .foregroundColor(.primaryText)
             .padding(.vertical, 8)
             .padding(.horizontal, style == .normal ? 2 : 8)
             .background {