Add 10 features: CSV export, dark mode, timeline, custom fields, print, diff, search, keyboard nav, pinch-zoom, flagged tasks

Medium-impact features:
- CSV export from task table with full hierarchy
- Dark mode polish across Gantt, header, workload views with adaptive opacities
- Timeline view with colored phase ribbons, milestones, pre-computed Canvas data
- Custom fields display (text/number/cost/flag/date) in detail view and table columns
- Print support via native NSPrintOperation for tasks and Gantt

Nice-to-have features:
- Diff two MPP versions with add/remove/modify detection and color-coded table
- Search bar with suggestions that navigate to matched tasks
- Keyboard shortcuts (Cmd+1-9) for sidebar navigation
- Pinch-to-zoom (MagnifyGesture) on Gantt and Workload views
- Bookmark/flag tasks with persistence via AppStorage

Bug fixes:
- Calendar parent chain resolution for resource working days (default type inheritance)
- Case-insensitive resource type comparison (WORK vs work)
- Assignment units displayed as percentage correctly (no double multiplication)
- Resource workload uses actual project calendars, exceptions, and working hours
- Pre-computed data for Timeline/Workload/Resource views to eliminate rendering lag
- Today line in workload canvas spans full height
- DiffView uses .fileImporter instead of NSOpenPanel for sandbox compatibility
- PDF export forces light appearance to avoid dark-mode artifacts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Engagendy

MPPViewer/MPPViewer.xcodeproj/project.pbxproj

@@ -34,6 +34,18 @@
 		A10000010000000000000030 /* MilestonesView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000032 /* MilestonesView.swift */; };
 		A10000010000000000000050 /* DashboardView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000052 /* DashboardView.swift */; };
 		A10000010000000000000040 /* MPPConverterProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000040 /* MPPConverterProtocol.swift */; };
+		A10000010000000000000080 /* TaskFilter.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000080 /* TaskFilter.swift */; };
+		A10000010000000000000081 /* EVMCalculator.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000081 /* EVMCalculator.swift */; };
+		A10000010000000000000082 /* WorkloadCalculator.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000082 /* WorkloadCalculator.swift */; };
+		A10000010000000000000083 /* FilterBarView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000083 /* FilterBarView.swift */; };
+		A10000010000000000000084 /* EarnedValueView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000084 /* EarnedValueView.swift */; };
+		A10000010000000000000085 /* WorkloadView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000085 /* WorkloadView.swift */; };
+		A10000010000000000000090 /* CSVExporter.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000090 /* CSVExporter.swift */; };
+		A10000010000000000000091 /* AnyCodable.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000091 /* AnyCodable.swift */; };
+		A10000010000000000000092 /* PrintManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000092 /* PrintManager.swift */; };
+		A10000010000000000000093 /* ProjectDiff.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000093 /* ProjectDiff.swift */; };
+		A10000010000000000000094 /* TimelineView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000094 /* TimelineView.swift */; };
+		A10000010000000000000095 /* DiffView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A20000010000000000000095 /* DiffView.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -90,6 +102,18 @@
 		A20000010000000000000032 /* MilestonesView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MilestonesView.swift; sourceTree = "<group>"; };
 		A20000010000000000000052 /* DashboardView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DashboardView.swift; sourceTree = "<group>"; };
 		A20000010000000000000040 /* MPPConverterProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MPPConverterProtocol.swift; sourceTree = "<group>"; };
+		A20000010000000000000080 /* TaskFilter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TaskFilter.swift; sourceTree = "<group>"; };
+		A20000010000000000000081 /* EVMCalculator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EVMCalculator.swift; sourceTree = "<group>"; };
+		A20000010000000000000082 /* WorkloadCalculator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WorkloadCalculator.swift; sourceTree = "<group>"; };
+		A20000010000000000000083 /* FilterBarView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FilterBarView.swift; sourceTree = "<group>"; };
+		A20000010000000000000084 /* EarnedValueView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EarnedValueView.swift; sourceTree = "<group>"; };
+		A20000010000000000000085 /* WorkloadView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WorkloadView.swift; sourceTree = "<group>"; };
+		A20000010000000000000090 /* CSVExporter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CSVExporter.swift; sourceTree = "<group>"; };
+		A20000010000000000000091 /* AnyCodable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnyCodable.swift; sourceTree = "<group>"; };
+		A20000010000000000000092 /* PrintManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PrintManager.swift; sourceTree = "<group>"; };
+		A20000010000000000000093 /* ProjectDiff.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ProjectDiff.swift; sourceTree = "<group>"; };
+		A20000010000000000000094 /* TimelineView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimelineView.swift; sourceTree = "<group>"; };
+		A20000010000000000000095 /* DiffView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DiffView.swift; sourceTree = "<group>"; };
 		A30000010000000000000001 /* MPPViewer.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = MPPViewer.app; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
@@ -164,6 +188,9 @@
 			children = (
 				A20000010000000000000004 /* ProjectModel.swift */,
 				A20000010000000000000005 /* ProjectStore.swift */,
+				A20000010000000000000080 /* TaskFilter.swift */,
+				A20000010000000000000091 /* AnyCodable.swift */,
+				A20000010000000000000093 /* ProjectDiff.swift */,
 			);
 			path = Models;
 			sourceTree = "<group>";
@@ -174,6 +201,8 @@
 				A20000010000000000000006 /* MPPConverterService.swift */,
 				A20000010000000000000007 /* JSONProjectParser.swift */,
 				A20000010000000000000040 /* MPPConverterProtocol.swift */,
+				A20000010000000000000081 /* EVMCalculator.swift */,
+				A20000010000000000000082 /* WorkloadCalculator.swift */,
 			);
 			path = Services;
 			sourceTree = "<group>";
@@ -190,6 +219,11 @@
 				A50000010000000000000014 /* Schedule */,
 				A50000010000000000000024 /* Milestones */,
 				A50000010000000000000034 /* Dashboard */,
+				A50000010000000000000080 /* Components */,
+				A50000010000000000000081 /* EarnedValue */,
+				A50000010000000000000082 /* Workload */,
+				A50000010000000000000090 /* Timeline */,
+				A50000010000000000000091 /* Diff */,
 			);
 			path = Views;
 			sourceTree = "<group>";
@@ -226,6 +260,8 @@
 				A20000010000000000000018 /* DurationFormatting.swift */,
 				A20000010000000000000019 /* ColorTheme.swift */,
 				A20000010000000000000070 /* PDFExporter.swift */,
+				A20000010000000000000090 /* CSVExporter.swift */,
+				A20000010000000000000092 /* PrintManager.swift */,
 			);
 			path = Utilities;
 			sourceTree = "<group>";
@@ -281,6 +317,46 @@
 			path = Dashboard;
 			sourceTree = "<group>";
 		};
+		A50000010000000000000080 /* Components */ = {
+			isa = PBXGroup;
+			children = (
+				A20000010000000000000083 /* FilterBarView.swift */,
+			);
+			path = Components;
+			sourceTree = "<group>";
+		};
+		A50000010000000000000081 /* EarnedValue */ = {
+			isa = PBXGroup;
+			children = (
+				A20000010000000000000084 /* EarnedValueView.swift */,
+			);
+			path = EarnedValue;
+			sourceTree = "<group>";
+		};
+		A50000010000000000000082 /* Workload */ = {
+			isa = PBXGroup;
+			children = (
+				A20000010000000000000085 /* WorkloadView.swift */,
+			);
+			path = Workload;
+			sourceTree = "<group>";
+		};
+		A50000010000000000000090 /* Timeline */ = {
+			isa = PBXGroup;
+			children = (
+				A20000010000000000000094 /* TimelineView.swift */,
+			);
+			path = Timeline;
+			sourceTree = "<group>";
+		};
+		A50000010000000000000091 /* Diff */ = {
+			isa = PBXGroup;
+			children = (
+				A20000010000000000000095 /* DiffView.swift */,
+			);
+			path = Diff;
+			sourceTree = "<group>";
+		};
 		A50000010000000000000099 /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -426,6 +502,18 @@
 				A10000010000000000000030 /* MilestonesView.swift in Sources */,
 				A10000010000000000000050 /* DashboardView.swift in Sources */,
 				A10000010000000000000040 /* MPPConverterProtocol.swift in Sources */,
+				A10000010000000000000080 /* TaskFilter.swift in Sources */,
+				A10000010000000000000081 /* EVMCalculator.swift in Sources */,
+				A10000010000000000000082 /* WorkloadCalculator.swift in Sources */,
+				A10000010000000000000083 /* FilterBarView.swift in Sources */,
+				A10000010000000000000084 /* EarnedValueView.swift in Sources */,
+				A10000010000000000000085 /* WorkloadView.swift in Sources */,
+				A10000010000000000000090 /* CSVExporter.swift in Sources */,
+				A10000010000000000000091 /* AnyCodable.swift in Sources */,
+				A10000010000000000000092 /* PrintManager.swift in Sources */,
+				A10000010000000000000093 /* ProjectDiff.swift in Sources */,
+				A10000010000000000000094 /* TimelineView.swift in Sources */,
+				A10000010000000000000095 /* DiffView.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

MPPViewer/MPPViewer/App/ContentView.swift

@@ -1,4 +1,9 @@
 import SwiftUI
+import Combine
+
+extension Notification.Name {
+    static let navigateToItem = Notification.Name("navigateToItem")
+}
 
 enum NavigationItem: String, CaseIterable, Identifiable {
     case dashboard = "Dashboard"
@@ -8,7 +13,11 @@ enum NavigationItem: String, CaseIterable, Identifiable {
     case schedule = "Schedule"
     case milestones = "Milestones"
     case resources = "Resources"
+    case earnedValue = "Earned Value"
+    case workload = "Workload"
     case calendar = "Calendar"
+    case timeline = "Timeline"
+    case diff = "Compare"
 
     var id: String { rawValue }
 
@@ -21,7 +30,11 @@ enum NavigationItem: String, CaseIterable, Identifiable {
         case .schedule: return "rectangle.split.2x1"
         case .milestones: return "diamond.fill"
         case .resources: return "person.2"
+        case .earnedValue: return "chart.line.uptrend.xyaxis"
+        case .workload: return "person.badge.clock"
         case .calendar: return "calendar"
+        case .timeline: return "rectangle.split.3x1"
+        case .diff: return "arrow.triangle.2.circlepath"
         }
     }
 }
@@ -31,6 +44,31 @@ struct ContentView: View {
     @StateObject private var store = ProjectStore()
     @State private var selectedNav: NavigationItem? = .dashboard
     @State private var searchText = ""
+    @State private var navigateToTaskID: Int?
+    @AppStorage("flaggedTaskIDs") private var flaggedTaskIDsData: Data = Data()
+
+    private var flaggedTaskIDs: Binding<Set<Int>> {
+        Binding(
+            get: {
+                (try? JSONDecoder().decode(Set<Int>.self, from: flaggedTaskIDsData)) ?? []
+            },
+            set: { newValue in
+                flaggedTaskIDsData = (try? JSONEncoder().encode(newValue)) ?? Data()
+            }
+        )
+    }
+
+    private var searchSuggestionTasks: [ProjectTask] {
+        guard let project = store.project, !searchText.isEmpty else { return [] }
+        let search = searchText.lowercased()
+        return project.tasks.filter { task in
+            task.name?.lowercased().contains(search) == true ||
+            task.wbs?.lowercased().contains(search) == true ||
+            task.notes?.lowercased().contains(search) == true
+        }
+        .prefix(10)
+        .map { $0 }
+    }
 
     var body: some View {
         NavigationSplitView {
@@ -66,11 +104,46 @@ struct ContentView: View {
             }
             .frame(maxWidth: .infinity, maxHeight: .infinity)
         }
-        .searchable(text: $searchText, prompt: "Filter tasks by name")
+        .searchable(text: $searchText, prompt: "Search tasks by name, WBS, or notes")
+        .searchSuggestions {
+            ForEach(searchSuggestionTasks) { task in
+                Button {
+                    selectedNav = .tasks
+                    navigateToTaskID = task.uniqueID
+                    searchText = ""
+                } label: {
+                    HStack {
+                        if task.milestone == true {
+                            Image(systemName: "diamond.fill")
+                                .font(.caption2)
+                                .foregroundStyle(.orange)
+                        } else if task.summary == true {
+                            Image(systemName: "folder.fill")
+                                .font(.caption2)
+                                .foregroundStyle(.blue)
+                        }
+                        VStack(alignment: .leading) {
+                            Text(task.displayName)
+                                .font(.caption)
+                            if let wbs = task.wbs {
+                                Text(wbs)
+                                    .font(.caption2)
+                                    .foregroundStyle(.secondary)
+                            }
+                        }
+                    }
+                }
+            }
+        }
         .navigationTitle(store.project?.properties.projectTitle ?? "MPP Viewer")
         .task {
             await store.loadFromDocument(document)
         }
+        .onReceive(NotificationCenter.default.publisher(for: .navigateToItem)) { notification in
+            if let item = notification.object as? NavigationItem {
+                selectedNav = item
+            }
+        }
     }
 
     @ViewBuilder
@@ -81,7 +154,15 @@ struct ContentView: View {
         case .summary:
             ProjectSummaryView(project: project)
         case .tasks:
-            TaskTableView(tasks: project.rootTasks, allTasks: project.tasksByID, searchText: searchText, resources: project.resources, assignments: project.assignments)
+            TaskTableView(
+                tasks: project.rootTasks,
+                allTasks: project.tasksByID,
+                searchText: searchText,
+                resources: project.resources,
+                assignments: project.assignments,
+                flaggedTaskIDs: flaggedTaskIDs,
+                navigateToTaskID: $navigateToTaskID
+            )
         case .gantt:
             GanttChartView(project: project, searchText: searchText)
         case .schedule:
@@ -90,8 +171,16 @@ struct ContentView: View {
             MilestonesView(tasks: project.tasks, allTasks: project.tasksByID, searchText: searchText)
         case .resources:
             ResourceSheetView(resources: project.resources, assignments: project.assignments)
+        case .earnedValue:
+            EarnedValueView(project: project)
+        case .workload:
+            WorkloadView(project: project)
         case .calendar:
             CalendarView(calendars: project.calendars)
+        case .timeline:
+            TimelineView(project: project)
+        case .diff:
+            DiffView(project: project)
         case .none:
             Text("Select a view from the sidebar")
                 .foregroundStyle(.secondary)

MPPViewer/MPPViewer/App/MPPViewerApp.swift

@@ -1,14 +1,36 @@
 import SwiftUI
 import UniformTypeIdentifiers
+import AppKit
+
+class AppDelegate: NSObject, NSApplicationDelegate {
+    func applicationDidFinishLaunching(_ notification: Notification) {
+        NSWindow.allowsAutomaticWindowTabbing = true
+    }
+}
 
 @main
 struct MPPViewerApp: App {
+    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
+
     var body: some Scene {
         DocumentGroup(viewing: MPPDocument.self) { file in
             ContentView(document: file.document)
         }
         .commands {
             CommandGroup(replacing: .newItem) {}
+            CommandGroup(after: .sidebar) {
+                ForEach(Array(NavigationItem.allCases.enumerated()), id: \.element.id) { index, item in
+                    if index < 9 {
+                        Button(item.rawValue) {
+                            NotificationCenter.default.post(
+                                name: .navigateToItem,
+                                object: item
+                            )
+                        }
+                        .keyboardShortcut(KeyEquivalent(Character("\(index + 1)")), modifiers: .command)
+                    }
+                }
+            }
         }
     }
 }

MPPViewer/MPPViewer/Models/AnyCodable.swift

@@ -0,0 +1,55 @@
+import Foundation
+
+struct AnyCodable: Codable {
+    let value: Any
+
+    var displayString: String {
+        switch value {
+        case let b as Bool:
+            return b ? "Yes" : "No"
+        case let i as Int:
+            return String(i)
+        case let d as Double:
+            return String(format: "%.2f", d)
+        case let s as String:
+            return s
+        default:
+            return "\(value)"
+        }
+    }
+
+    init(_ value: Any) {
+        self.value = value
+    }
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        if let b = try? container.decode(Bool.self) {
+            value = b
+        } else if let i = try? container.decode(Int.self) {
+            value = i
+        } else if let d = try? container.decode(Double.self) {
+            value = d
+        } else if let s = try? container.decode(String.self) {
+            value = s
+        } else {
+            value = ""
+        }
+    }
+
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.singleValueContainer()
+        switch value {
+        case let b as Bool:
+            try container.encode(b)
+        case let i as Int:
+            try container.encode(i)
+        case let d as Double:
+            try container.encode(d)
+        case let s as String:
+            try container.encode(s)
+        default:
+            try container.encode("\(value)")
+        }
+    }
+}