chore: import upstream snapshot with attribution

ios/Sources/JCodeMobile/Theme.swift

@@ -0,0 +1,77 @@
+import SwiftUI
+
+/// Design tokens. Dark, calm, terminal-native; mint accent for live state.
+enum Theme {
+    static let background = Color(hex: 0x0F0F14)
+    static let surface = Color(hex: 0x1A1A1F)
+    static let surfaceElevated = Color(hex: 0x242429)
+    static let border = Color.white.opacity(0.08)
+    static let mint = Color(hex: 0x4DD9A6)
+    static let mintTint = Color(hex: 0x4DD9A6).opacity(0.15)
+    static let textPrimary = Color.white.opacity(0.92)
+    static let textSecondary = Color.white.opacity(0.55)
+    static let textTertiary = Color.white.opacity(0.35)
+    static let warning = Color(hex: 0xF59E0B)
+    static let error = Color(hex: 0xD94D59)
+
+    static func mono(_ size: CGFloat, weight: Font.Weight = .regular) -> Font {
+        .system(size: size, weight: weight, design: .monospaced)
+    }
+
+    /// Decorative icon font (SF Symbols) at a fixed point size.
+    static func icon(_ size: CGFloat, weight: Font.Weight = .regular) -> Font {
+        .system(size: size, weight: weight)
+    }
+}
+
+extension Color {
+    init(hex: UInt32) {
+        self.init(
+            red: Double((hex >> 16) & 0xFF) / 255.0,
+            green: Double((hex >> 8) & 0xFF) / 255.0,
+            blue: Double(hex & 0xFF) / 255.0
+        )
+    }
+}
+
+/// Extra edge padding for chrome pinned to an edge with no system inset.
+///
+/// Home-button devices (iPhone SE class) report a zero bottom safe-area inset,
+/// so edge-pinned chrome needs explicit breathing room there; Dynamic Island
+/// devices already get it from the system insets. Derived from the root
+/// GeometryReader in RootView and injected via the environment: reading
+/// UIKit window insets during a SwiftUI body evaluation creates an
+/// AttributeGraph cycle that corrupts view-hierarchy updates.
+struct CompactEdgePads: Equatable {
+    var top: CGFloat = 0
+    var bottom: CGFloat = 0
+
+    /// Derives the pads from the container's safe-area insets.
+    init(safeArea: EdgeInsets) {
+        top = safeArea.top < 24 ? 12 : 0
+        bottom = safeArea.bottom > 0 ? 0 : 12
+    }
+
+    init() {}
+}
+
+extension EnvironmentValues {
+    @Entry var compactEdgePads = CompactEdgePads()
+}
+
+/// Card container used across screens.
+struct Card<Content: View>: View {
+    @ViewBuilder var content: Content
+
+    var body: some View {
+        content
+            .padding(14)
+            .frame(maxWidth: .infinity, alignment: .leading)
+            .background(Theme.surface)
+            .clipShape(RoundedRectangle(cornerRadius: 14))
+            .overlay(
+                RoundedRectangle(cornerRadius: 14)
+                    .stroke(Theme.border, lineWidth: 1)
+            )
+    }
+}