```

refactor: 重命名项目名称从"体己"到"康康"

将整个项目的目录结构从"体己"重命名为"康康"，包括所有源代码文件、
资源文件、测试文件以及Xcode项目配置文件。此更改涉及项目中所有的
文件路径和应用入口点(App/TijiApp.swift → App/KangkangApp.swift)。
```

康康/DesignSystem/Components.swift

@@ -0,0 +1,146 @@
+import SwiftUI
+
+struct TjLockChip: View {
+    var body: some View {
+        HStack(spacing: 4) {
+            Image(systemName: "lock.fill")
+                .font(.system(size: 9, weight: .semibold))
+            Text("本地加密")
+                .font(.system(size: 10))
+                .tracking(0.5)
+        }
+        .foregroundStyle(Tj.Palette.paper)
+        .padding(.horizontal, 7)
+        .padding(.vertical, 3)
+        .background(Capsule().fill(Tj.Palette.ink))
+    }
+}
+
+enum TjBadgeStyle {
+    case brick, amber, leaf, ink, neutral
+
+    var bg: Color {
+        switch self {
+        case .brick:   return Tj.Palette.brickSoft
+        case .amber:   return Color(red: 0.957, green: 0.890, blue: 0.749)
+        case .leaf:    return Tj.Palette.leafSoft
+        case .ink:     return Tj.Palette.ink
+        case .neutral: return Tj.Palette.sand2
+        }
+    }
+    var fg: Color {
+        switch self {
+        case .brick:   return Tj.Palette.brick
+        case .amber:   return Tj.Palette.amber
+        case .leaf:    return Tj.Palette.leaf
+        case .ink:     return Tj.Palette.paper
+        case .neutral: return Tj.Palette.text2
+        }
+    }
+}
+
+struct TjBadge: View {
+    let text: String
+    var style: TjBadgeStyle = .neutral
+    var body: some View {
+        Text(text)
+            .font(.system(size: 10, weight: .semibold))
+            .tracking(0.3)
+            .foregroundStyle(style.fg)
+            .padding(.horizontal, 7)
+            .padding(.vertical, 2)
+            .background(Capsule().fill(style.bg))
+            .lineLimit(1)
+    }
+}
+
+struct TjPlaceholder: View {
+    let label: String
+    var dark: Bool = false
+    var radius: CGFloat = Tj.Radius.sm
+
+    var body: some View {
+        ZStack {
+            RoundedRectangle(cornerRadius: radius, style: .continuous)
+                .fill(dark ? Color(red: 0.110, green: 0.122, blue: 0.110) : Tj.Palette.sand2)
+            DiagonalStripes(spacing: 7, color: dark ? Color.white.opacity(0.04) : Color.black.opacity(0.05))
+                .clipShape(RoundedRectangle(cornerRadius: radius, style: .continuous))
+            Text(label)
+                .font(.system(size: 11, design: .monospaced))
+                .tracking(0.5)
+                .foregroundStyle(dark ? Color.white.opacity(0.5) : Tj.Palette.text3)
+                .multilineTextAlignment(.center)
+                .padding(8)
+        }
+    }
+}
+
+private struct DiagonalStripes: View {
+    let spacing: CGFloat
+    let color: Color
+
+    var body: some View {
+        Canvas { ctx, size in
+            let step = spacing
+            let count = Int((size.width + size.height) / step) + 4
+            for i in -2..<count {
+                let x = CGFloat(i) * step
+                var path = Path()
+                path.move(to: CGPoint(x: x, y: 0))
+                path.addLine(to: CGPoint(x: x + size.height, y: size.height))
+                ctx.stroke(path, with: .color(color), lineWidth: 1)
+            }
+        }
+    }
+}
+
+struct TjPrimaryButton: ButtonStyle {
+    var height: CGFloat = 48
+    var fontSize: CGFloat = 15
+    var horizontalPadding: CGFloat = 22
+
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .font(.system(size: fontSize, weight: .semibold))
+            .tracking(1)
+            .foregroundStyle(Tj.Palette.paper)
+            .padding(.horizontal, horizontalPadding)
+            .frame(height: height)
+            .background(Capsule().fill(Tj.Palette.ink))
+            .opacity(configuration.isPressed ? 0.85 : 1)
+    }
+}
+
+struct TjGhostButton: ButtonStyle {
+    var height: CGFloat = 48
+    var fontSize: CGFloat = 15
+    var horizontalPadding: CGFloat = 22
+
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .font(.system(size: fontSize, weight: .semibold))
+            .tracking(1)
+            .foregroundStyle(Tj.Palette.ink)
+            .padding(.horizontal, horizontalPadding)
+            .frame(height: height)
+            .background(
+                Capsule().strokeBorder(Tj.Palette.ink, lineWidth: 1)
+            )
+            .opacity(configuration.isPressed ? 0.7 : 1)
+    }
+}
+
+struct TjDashedDivider: View {
+    var body: some View {
+        Rectangle()
+            .fill(Tj.Palette.line)
+            .frame(height: 1)
+            .mask(
+                HStack(spacing: 4) {
+                    ForEach(0..<200, id: \.self) { _ in
+                        Rectangle().frame(width: 4, height: 1)
+                    }
+                }
+            )
+    }
+}