feat: add summary dashboard history charts

Sources/iKeyMonApp.swift

@@ -6,6 +6,7 @@
 //
 
 import SwiftUI
+import SwiftData
 #if os(macOS)
 import AppKit
 #endif
@@ -13,6 +14,7 @@ import AppKit
 @main
 struct iKeyMonApp: App {
     @StateObject private var sparkleUpdater = SparkleUpdater()
+    private let modelContainer: ModelContainer
 
     init() {
         #if os(macOS)
@@ -20,6 +22,8 @@ struct iKeyMonApp: App {
             NSApplication.shared.applicationIconImage = customIcon
         }
         #endif
+
+        self.modelContainer = Self.makeModelContainer()
     }
 
     var body: some Scene {
@@ -30,6 +34,7 @@ struct iKeyMonApp: App {
                     NSApp.terminate(nil)
                 }
         }
+        .modelContainer(modelContainer)
         .windowResizability(.contentMinSize)
 
         Settings {
@@ -38,4 +43,55 @@ struct iKeyMonApp: App {
                 .environmentObject(sparkleUpdater)
         }
     }
+
+    private static func makeModelContainer() -> ModelContainer {
+        let schema = Schema([MetricSample.self])
+        let storeURL = metricStoreURL()
+        let configuration = ModelConfiguration(url: storeURL)
+
+        do {
+            return try ModelContainer(for: schema, configurations: [configuration])
+        } catch {
+            print("⚠️ [SwiftData] Failed to open metric store at \(storeURL.path): \(error)")
+            resetMetricStore(at: storeURL)
+
+            do {
+                return try ModelContainer(for: schema, configurations: [configuration])
+            } catch {
+                fatalError("Unable to create metric history store: \(error)")
+            }
+        }
+    }
+
+    private static func metricStoreURL() -> URL {
+        let fileManager = FileManager.default
+        let appSupport = fileManager.urls(for: .applicationSupportDirectory, in: .userDomainMask).first!
+        let directory = appSupport
+            .appendingPathComponent(Bundle.main.bundleIdentifier ?? "net.24unix.iKeyMon", isDirectory: true)
+
+        do {
+            try fileManager.createDirectory(at: directory, withIntermediateDirectories: true)
+        } catch {
+            fatalError("Unable to create application support directory: \(error)")
+        }
+
+        return directory.appendingPathComponent("metric-history.store")
+    }
+
+    private static func resetMetricStore(at url: URL) {
+        let fileManager = FileManager.default
+        let sidecarURLs = [
+            url,
+            url.appendingPathExtension("shm"),
+            url.appendingPathExtension("wal")
+        ]
+
+        for sidecarURL in sidecarURLs where fileManager.fileExists(atPath: sidecarURL.path) {
+            do {
+                try fileManager.removeItem(at: sidecarURL)
+            } catch {
+                print("⚠️ [SwiftData] Failed to remove \(sidecarURL.path): \(error)")
+            }
+        }
+    }
 }