feat: add Atlas native app UX overhaul

Packages/AtlasFeaturesStorage/README.md

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+# AtlasFeaturesStorage
+
+## Responsibility
+
+- Large folders, large files, and unused-item views
+
+## Note
+
+- The full storage module is deferred beyond the frozen MVP shell.
+- This directory remains scaffolded so list-based storage work can resume without changing top-level layout.

Packages/AtlasFeaturesStorage/Sources/AtlasFeaturesStorage/StorageFeatureView.swift

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+import AtlasDesignSystem
+import AtlasDomain
+import SwiftUI
+
+public struct StorageFeatureView: View {
+    private let insights: [StorageInsight]
+
+    public init(insights: [StorageInsight] = AtlasScaffoldFixtures.storageInsights) {
+        self.insights = insights
+    }
+
+    public var body: some View {
+        AtlasScreen(
+            title: "Storage",
+            subtitle: "Reserved list-based storage views for a future scope decision beyond the frozen MVP shell."
+        ) {
+            AtlasInfoCard(title: "Large Items") {
+                VStack(alignment: .leading, spacing: 14) {
+                    ForEach(insights) { insight in
+                        HStack(alignment: .top, spacing: 12) {
+                            VStack(alignment: .leading, spacing: 6) {
+                                Text(insight.title)
+                                    .font(.headline)
+                                Text(insight.path)
+                                    .font(.subheadline)
+                                    .foregroundStyle(.secondary)
+                            }
+
+                            Spacer()
+
+                            VStack(alignment: .trailing, spacing: 8) {
+                                AtlasStatusChip(insight.ageDescription, tone: .neutral)
+                                Text(AtlasFormatters.byteCount(insight.bytes))
+                                    .font(.subheadline.weight(.medium))
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}