From c8a1b811bffd13dc6dfa39a7c5c0d4ee76cd11e5 Mon Sep 17 00:00:00 2001
From: Ariver <ar@MacBook-Air.local>
Date: Mon, 11 May 2026 12:53:34 +0800
Subject: [PATCH] Release TagLauncher 5.5.0

---
 Apptag/ContentView.swift |  524 ++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 files changed, 418 insertions(+), 106 deletions(-)

diff --git a/Apptag/ContentView.swift b/Apptag/ContentView.swift
index 14a9452..c3eb159 100644
--- a/Apptag/ContentView.swift
+++ b/Apptag/ContentView.swift
@@ -1,10 +1,11 @@
 import SwiftUI
 import AppKit
+import UniformTypeIdentifiers
 
 // MARK: - Notification for manual re-index
 
 extension Notification.Name {
-    static let apptagEditModeChanged = Notification.Name("ApptagEditModeChanged")
+    static let tagLauncherEditModeChanged = Notification.Name("TagLauncherEditModeChanged")
 }
 
 // MARK: - Edit Phase
@@ -206,6 +207,11 @@
     @State private var hoveredContainer: String? = nil  // colored container lift
     // Fixed interaction for "Colorless Container": hover fills persistently; click clears.
     @State private var filledColorlessContainer: String? = nil
+    @State private var appDragModeActive = false
+    @State private var dropWarningToast: String? = nil
+    @State private var dropRefreshVisible = false
+    @State private var dropRefreshStartedAt: Date? = nil
+    @State private var layoutRefreshID = UUID()
 
     // Configurable defaults
     @AppStorage("defaultGroupName") private var defaultGroupName = "Other"
@@ -252,6 +258,41 @@
             case .editingApps:
                 editAppsView
             }
+
+            if let message = dropWarningToast {
+                Text(message)
+                    .font(.system(size: 16, weight: .semibold))
+                    .foregroundStyle(.primary)
+                    .padding(.horizontal, 22)
+                    .padding(.vertical, 12)
+                    .background(
+                        RoundedRectangle(cornerRadius: 10)
+                            .fill(.ultraThickMaterial)
+                            .shadow(color: .black.opacity(0.22), radius: 18, y: 10)
+                    )
+                    .transition(.scale(scale: 0.96).combined(with: .opacity))
+                    .allowsHitTesting(false)
+            }
+
+            if dropRefreshVisible {
+                Color.black.opacity(0.08)
+                    .ignoresSafeArea()
+                    .transition(.opacity)
+                    .allowsHitTesting(false)
+
+                ProgressView()
+                    .progressViewStyle(.circular)
+                    .controlSize(.large)
+                    .scaleEffect(1.15)
+                    .padding(24)
+                    .background(
+                        RoundedRectangle(cornerRadius: 12)
+                            .fill(.ultraThickMaterial)
+                            .shadow(color: .black.opacity(0.26), radius: 24, y: 12)
+                    )
+                    .transition(.scale(scale: 0.92).combined(with: .opacity))
+                    .allowsHitTesting(false)
+            }
         }
         .onAppear {
             let mousePoint = NSEvent.mouseLocation
@@ -267,7 +308,7 @@
         .onChange(of: editPhase) { _, newPhase in
             let active = newPhase != .none
             NotificationCenter.default.post(
-                name: .apptagEditModeChanged,
+                name: .tagLauncherEditModeChanged,
                 object: nil,
                 userInfo: ["active": active]
             )
@@ -277,7 +318,7 @@
     /// Set edit phase with synchronous notification BEFORE state change.
     func setEditPhase(_ phase: EditPhase) {
         if phase != .none {
-            NotificationCenter.default.post(name: .apptagEditModeChanged, object: nil, userInfo: ["active": true])
+            NotificationCenter.default.post(name: .tagLauncherEditModeChanged, object: nil, userInfo: ["active": true])
             NSApp.activate(ignoringOtherApps: true)
             // Always sync tag list from database when entering edit mode
             let store = TagDatabase.load()
@@ -287,7 +328,7 @@
         editPhase = phase
         if phase == .none {
             DispatchQueue.main.async {
-                NotificationCenter.default.post(name: .apptagEditModeChanged, object: nil, userInfo: ["active": false])
+                NotificationCenter.default.post(name: .tagLauncherEditModeChanged, object: nil, userInfo: ["active": false])
             }
         }
     }
@@ -403,6 +444,7 @@
                 flatGrid
             }
         }
+        .id(layoutRefreshID)
     }
 
     private var flatGrid: some View {
@@ -415,7 +457,12 @@
                             onSelectApp: { app in openApp(app) },
                             tagFontSize: tagFontSize,
                             iconSize: iconSize,
-                            showNames: !hideAppNames
+                            showNames: !hideAppNames,
+                            dragModeActive: appDragModeActive,
+                            onDragModeChange: { setAppDragMode($0) },
+                            onDropApp: { path, source, copy in
+                                dropApp(path: path, sourceTag: source, targetTag: group.name, copy: copy)
+                            }
                         ).id(group.id)
                     }
                 }.padding(20)
@@ -471,10 +518,12 @@
 
     private func estimatedCardHeight(_ group: TagGroup, width: CGFloat) -> CGFloat {
         let inner = width - 32
-        let itemW = iconSize + 28 + 6
+        let itemW = AppGridItem.stableWidth(iconSize: iconSize) + 6
         let perRow = max(1, Int(inner / itemW))
         let rows = (group.apps.count + perRow - 1) / perRow
-        return 32 + CGFloat(rows) * (iconSize + 30)
+        return 32
+            + CGFloat(rows) * AppGridItem.stableHeight(iconSize: iconSize)
+            + CGFloat(max(0, rows - 1)) * 2
     }
 
     private func masonryCard(_ group: TagGroup, width: CGFloat) -> some View {
@@ -482,6 +531,7 @@
         let isColorless = isColorlessContainerMode
         let isColorlessFilled = isColorless && filledColorlessContainer == group.name
         let isHovered = hoveredContainer == group.name
+        let isColorlessActive = isColorless && (isColorlessFilled || isHovered)
         let tagColor = Color(nsColor: TagColor.nsColor(for: tagColors[group.name] ?? 0))
         return VStack(alignment: .leading, spacing: 6) {
             HStack(spacing: 0) {
@@ -497,13 +547,21 @@
                 Rectangle().fill(.secondary.opacity(0.25)).frame(height: 1)
                     .layoutPriority(0)
             }
-            let itemSize = iconSize + 28
+            let itemSize = AppGridItem.stableWidth(iconSize: iconSize)
             LazyVGrid(
                 columns: [GridItem(.adaptive(minimum: itemSize, maximum: itemSize + 36), spacing: 6)],
                 spacing: 2
             ) {
                 ForEach(group.apps) { app in
-                    AppGridItem(app: app, iconSize: iconSize, showName: !hideAppNames, onSelect: { openApp(app) })
+                    AppGridItem(
+                        app: app,
+                        iconSize: iconSize,
+                        showName: !hideAppNames,
+                        sourceTag: group.name,
+                        dragModeActive: appDragModeActive,
+                        onDragModeChange: { setAppDragMode($0) },
+                        onSelect: { openApp(app) }
+                    )
                 }
             }
         }
@@ -511,7 +569,7 @@
         .padding(16)
         .background(
             RoundedRectangle(cornerRadius: 14)
-                .fill((isColored || isColorlessFilled) ? tagColor.opacity(0.30) : Color.clear)
+                .fill((isColored || isColorlessActive) ? tagColor.opacity(0.30) : Color.clear)
                 .background(
                     RoundedRectangle(cornerRadius: 14)
                         .fill(.ultraThinMaterial)
@@ -521,23 +579,31 @@
             RoundedRectangle(cornerRadius: 14)
                 .stroke(Color.primary.opacity(0.08), lineWidth: 1)
         )
-        .shadow(color: .black.opacity(isColored && isHovered ? 0.22 : 0),
-                radius: isColored && isHovered ? 18 : 0,
-                y: isColored && isHovered ? 10 : 0)
+        .overlay {
+            AppDropTargetView(targetTag: group.name) { path, source, copy in
+                dropApp(path: path, sourceTag: source, targetTag: group.name, copy: copy)
+            }
+            .allowsHitTesting(false)
+        }
+        .shadow(color: .black.opacity((isColored && isHovered) || isColorlessActive ? 0.22 : 0),
+                radius: (isColored && isHovered) || isColorlessActive ? 18 : 0,
+                y: (isColored && isHovered) || isColorlessActive ? 10 : 0)
         .scaleEffect(isColored && isHovered ? 1.015 : 1.0)
         .animation(.spring(response: 0.25, dampingFraction: 0.82), value: isHovered)
+        .animation(.spring(response: 0.25, dampingFraction: 0.82), value: isColorlessFilled)
         .onHover { hovering in
-            if isColored {
+            if isColored || isColorless {
                 hoveredContainer = hovering ? group.name : nil
-            } else if hovering {
-                fillColorlessContainer(group.name)
             }
         }
         .contentShape(RoundedRectangle(cornerRadius: 14))
         .onTapGesture {
-            if isColorlessFilled {
-                filledColorlessContainer = nil
+            if isColorless {
+                toggleColorlessFill(group.name)
             }
+        }
+        .onDrop(of: [UTType.plainText], isTargeted: nil) { providers in
+            handleAppDrop(providers, targetTag: group.name)
         }
     }
 
@@ -547,23 +613,19 @@
             let gap: CGFloat = 16
             let available = geo.size.width - outerPad * 2
             let preferredCount = preferredGridContainersPerRow(availableWidth: available)
-            let rows = gridContainerRows(groups: groups, preferredCount: preferredCount)
+            let rows = gridContainerRows(groups: groups, trackCount: preferredCount, availableWidth: available, gap: gap)
 
             ScrollViewReader { proxy in
                 ScrollView {
-                    LazyVStack(alignment: .leading, spacing: gap) {
-                        ForEach(rows.indices, id: \.self) { rowIndex in
+                    VStack(alignment: .leading, spacing: gap) {
+                        ForEach(Array(rows.indices), id: \.self) { rowIndex in
                             let row = rows[rowIndex]
-                            let rowCount = max(1, row.count)
-                            let cardWidth = (available - gap * CGFloat(rowCount - 1)) / CGFloat(rowCount)
-                            let fixedRows = row.map {
-                                iconRows(appCount: $0.apps.count, width: cardWidth)
-                            }.max() ?? 1
 
                             HStack(alignment: .top, spacing: gap) {
-                                ForEach(row) { group in
-                                    gridContainerCard(group, width: cardWidth, fixedRows: fixedRows)
-                                        .id(group.id)
+                                ForEach(Array(row.items.indices), id: \.self) { itemIndex in
+                                    let item = row.items[itemIndex]
+                                    gridContainerCard(item.group, width: item.width, fixedRows: row.fixedRows)
+                                        .id(item.group.id)
                                 }
                             }
                         }
@@ -578,27 +640,111 @@
     }
 
     private func preferredGridContainersPerRow(availableWidth: CGFloat) -> Int {
-        let minCardWidth = max(260, iconSize * 3 + 88)
+        let minCardWidth = max(260, AppGridItem.stableWidth(iconSize: iconSize) * 3 + 64)
         if availableWidth >= minCardWidth * 3 + 32 { return 3 }
         if availableWidth >= minCardWidth * 2 + 16 { return 2 }
         return 1
     }
 
-    private func gridContainerRows(groups: [TagGroup], preferredCount: Int) -> [[TagGroup]] {
-        var rows: [[TagGroup]] = []
+    private struct GridContainerLayoutItem {
+        let group: TagGroup
+        let width: CGFloat
+    }
+
+    private struct GridContainerLayoutRow {
+        let items: [GridContainerLayoutItem]
+        let fixedRows: Int
+    }
+
+    private struct GridContainerCandidate {
+        let spans: [Int]
+        let rows: Int
+        let cost: CGFloat
+    }
+
+    private func gridContainerRows(groups: [TagGroup], trackCount: Int, availableWidth: CGFloat, gap: CGFloat) -> [GridContainerLayoutRow] {
+        let trackCount = max(1, trackCount)
+        let trackWidth = (availableWidth - gap * CGFloat(trackCount - 1)) / CGFloat(trackCount)
+        let patterns = gridContainerSpanPatterns(trackCount: trackCount)
+        let n = groups.count
+        guard n > 0 else { return [] }
+
+        var bestCost = Array(repeating: CGFloat.greatestFiniteMagnitude, count: n + 1)
+        var bestPattern = Array(repeating: [Int](), count: n)
+        bestCost[n] = 0
+
+        for index in stride(from: n - 1, through: 0, by: -1) {
+            for pattern in patterns where index + pattern.count <= n {
+                let candidate = gridContainerCandidate(
+                    groups: groups,
+                    startIndex: index,
+                    spans: pattern,
+                    trackWidth: trackWidth,
+                    availableWidth: availableWidth,
+                    gap: gap
+                )
+                let totalCost = candidate.cost + bestCost[index + pattern.count]
+                if totalCost < bestCost[index] {
+                    bestCost[index] = totalCost
+                    bestPattern[index] = candidate.spans
+                }
+            }
+        }
+
+        var rows: [GridContainerLayoutRow] = []
         var index = 0
-        while index < groups.count {
-            let remaining = groups.count - index
-            let count = min(max(1, preferredCount), remaining)
-            rows.append(Array(groups[index..<index + count]))
-            index += count
+        while index < n {
+            let spans = bestPattern[index].isEmpty ? [trackCount] : bestPattern[index]
+            let widths = spans.map { gridContainerWidth(trackWidth: trackWidth, span: $0, gap: gap) }
+            let fixedRows = widths.indices.map {
+                iconRows(appCount: groups[index + $0].apps.count, width: widths[$0])
+            }.max() ?? 1
+            let items = widths.indices.map {
+                GridContainerLayoutItem(group: groups[index + $0], width: widths[$0])
+            }
+            rows.append(GridContainerLayoutRow(items: items, fixedRows: fixedRows))
+            index += spans.count
         }
         return rows
     }
 
+    private func gridContainerSpanPatterns(trackCount: Int) -> [[Int]] {
+        switch trackCount {
+        case 3:
+            return [[1, 1, 1], [1, 2], [2, 1], [3]]
+        case 2:
+            return [[1, 1], [2]]
+        default:
+            return [[1]]
+        }
+    }
+
+    private func gridContainerCandidate(
+        groups: [TagGroup],
+        startIndex: Int,
+        spans: [Int],
+        trackWidth: CGFloat,
+        availableWidth: CGFloat,
+        gap: CGFloat
+    ) -> GridContainerCandidate {
+        let widths = spans.map { gridContainerWidth(trackWidth: trackWidth, span: $0, gap: gap) }
+        let rowCounts = widths.indices.map {
+            iconRows(appCount: groups[startIndex + $0].apps.count, width: widths[$0])
+        }
+        let fixedRows = rowCounts.max() ?? 1
+        let rowArea = CGFloat(fixedRows) * iconCellHeight() * availableWidth
+        let paddingCost = CGFloat(spans.count) * 0.001
+        return GridContainerCandidate(spans: spans, rows: fixedRows, cost: rowArea + paddingCost)
+    }
+
+    private func gridContainerWidth(trackWidth: CGFloat, span: Int, gap: CGFloat) -> CGFloat {
+        let span = max(1, span)
+        return trackWidth * CGFloat(span) + gap * CGFloat(span - 1)
+    }
+
     private func iconColumns(width: CGFloat) -> Int {
         let inner = width - 32
-        let itemW = iconSize + 34
+        let itemW = AppGridItem.stableWidth(iconSize: iconSize) + 6
         return max(1, Int((inner + 6) / itemW))
     }
 
@@ -609,12 +755,17 @@
 
     private func gridContainerCard(_ group: TagGroup, width: CGFloat, fixedRows: Int) -> some View {
         let isColored = displayMode == "coloredGridContainer"
+        let isColorlessGrid = displayMode == "gridContainer"
         let isColorless = isColorlessContainerMode
         let isColorlessFilled = isColorless && filledColorlessContainer == group.name
         let isHovered = hoveredContainer == group.name
+        let isColorlessGridActive = isColorlessGrid && (isColorlessFilled || isHovered)
         let cols = iconColumns(width: width)
-        let maxCells = max(cols, fixedRows * cols)
-        let emptyCells = max(0, maxCells - group.apps.count)
+        let contentWidth = max(1, width - 32)
+        let cellWidth = max(1, (contentWidth - 6 * CGFloat(cols - 1)) / CGFloat(cols))
+        let cellHeight = iconCellHeight()
+        let gridHeight = CGFloat(fixedRows) * cellHeight + CGFloat(max(0, fixedRows - 1)) * 2
+        let rows = appRows(group.apps, columns: cols, fixedRows: fixedRows)
         let tagColor = Color(nsColor: TagColor.nsColor(for: tagColors[group.name] ?? 0))
 
         return VStack(alignment: .leading, spacing: 6) {
@@ -632,24 +783,39 @@
                     .layoutPriority(0)
             }
 
-            LazyVGrid(
-                columns: Array(repeating: GridItem(.flexible(), spacing: 6), count: cols),
-                spacing: 2
-            ) {
-                ForEach(group.apps) { app in
-                    AppGridItem(app: app, iconSize: iconSize, showName: !hideAppNames, onSelect: { openApp(app) })
-                }
-                ForEach(0..<emptyCells, id: \.self) { _ in
-                    Color.clear
-                        .frame(width: iconSize + 20, height: iconSize + (hideAppNames ? 16 : 42))
+            VStack(alignment: .leading, spacing: 2) {
+                ForEach(rows.indices, id: \.self) { rowIndex in
+                    HStack(alignment: .top, spacing: 6) {
+                        ForEach(rows[rowIndex]) { app in
+                            AppGridItem(
+                                app: app,
+                                iconSize: iconSize,
+                                showName: !hideAppNames,
+                                sourceTag: group.name,
+                                dragModeActive: appDragModeActive,
+                                onDragModeChange: { setAppDragMode($0) },
+                                onSelect: { openApp(app) }
+                            )
+                                .frame(width: cellWidth)
+                                .frame(height: cellHeight)
+                        }
+
+                        let emptyCells = max(0, cols - rows[rowIndex].count)
+                        ForEach(0..<emptyCells, id: \.self) { _ in
+                            Color.clear
+                                .frame(width: cellWidth, height: cellHeight)
+                        }
+                    }
+                    .frame(height: cellHeight)
                 }
             }
+            .frame(height: gridHeight, alignment: .topLeading)
         }
-        .frame(width: width)
+        .frame(width: contentWidth)
         .padding(16)
         .background(
             RoundedRectangle(cornerRadius: 14)
-                .fill((isColored || isColorlessFilled) ? tagColor.opacity(0.30) : Color.clear)
+                .fill((isColored || isColorlessGridActive) ? tagColor.opacity(0.30) : Color.clear)
                 .background(
                     RoundedRectangle(cornerRadius: 14)
                         .fill(.ultraThinMaterial)
@@ -659,13 +825,20 @@
             RoundedRectangle(cornerRadius: 14)
                 .stroke(Color.primary.opacity(0.08), lineWidth: 1)
         )
-        .shadow(color: .black.opacity(isColored && isHovered ? 0.22 : 0),
-                radius: isColored && isHovered ? 18 : 0,
-                y: isColored && isHovered ? 10 : 0)
+        .overlay {
+            AppDropTargetView(targetTag: group.name) { path, source, copy in
+                dropApp(path: path, sourceTag: source, targetTag: group.name, copy: copy)
+            }
+            .allowsHitTesting(false)
+        }
+        .shadow(color: .black.opacity((isColored && isHovered) || isColorlessGridActive ? 0.22 : 0),
+                radius: (isColored && isHovered) || isColorlessGridActive ? 18 : 0,
+                y: (isColored && isHovered) || isColorlessGridActive ? 10 : 0)
         .scaleEffect(isColored && isHovered ? 1.015 : 1.0)
         .animation(.spring(response: 0.25, dampingFraction: 0.82), value: isHovered)
+        .animation(.spring(response: 0.25, dampingFraction: 0.82), value: isColorlessFilled)
         .onHover { hovering in
-            if isColored {
+            if isColored || isColorlessGrid {
                 hoveredContainer = hovering ? group.name : nil
             } else if hovering {
                 fillColorlessContainer(group.name)
@@ -673,9 +846,27 @@
         }
         .contentShape(RoundedRectangle(cornerRadius: 14))
         .onTapGesture {
-            if isColorlessFilled {
-                filledColorlessContainer = nil
+            if isColorlessGrid {
+                toggleColorlessFill(group.name)
             }
+        }
+        .onDrop(of: [UTType.plainText], isTargeted: nil) { providers in
+            handleAppDrop(providers, targetTag: group.name)
+        }
+    }
+
+    private func iconCellHeight() -> CGFloat {
+        AppGridItem.stableHeight(iconSize: iconSize)
+    }
+
+    private func appRows(_ apps: [AppInfo], columns: Int, fixedRows: Int) -> [[AppInfo]] {
+        let columns = max(1, columns)
+        let rowCount = max(1, fixedRows)
+        return (0..<rowCount).map { rowIndex in
+            let start = rowIndex * columns
+            guard start < apps.count else { return [] }
+            let end = min(start + columns, apps.count)
+            return Array(apps[start..<end])
         }
     }
 
@@ -724,7 +915,7 @@
                 Spacer()
                 Button(tr("edit.confirm")) { confirmAssign() }
                     .buttonStyle(.borderedProminent)
-                    .disabled(selectedAppPaths.isEmpty || selectedTagNames.isEmpty)
+                    .disabled(selectedAppPaths.isEmpty)
             }
             .padding(.horizontal, 24)
             .padding(.top, notchHeight > 0 ? notchHeight + 10 : 20)
@@ -786,63 +977,43 @@
     }
 
     private var editAppsGrid: some View {
-        GeometryReader { geo in
-            let outerPad: CGFloat = 20
-            let gap: CGFloat = 16
-            let available = geo.size.width - outerPad * 2
-            let colW: CGFloat = 300
-            let colCount = max(1, Int((available + gap) / (colW + gap)))
-            let actualColW = (available - gap * CGFloat(colCount - 1)) / CGFloat(colCount)
-            let columns = distributeToColumns(groups: groups, colCount: colCount, colWidth: actualColW)
-
-            ScrollView {
-                HStack(alignment: .top, spacing: gap) {
-                    ForEach(0..<colCount, id: \.self) { ci in
-                        LazyVStack(spacing: gap) {
-                            ForEach(columns[ci]) { group in
-                                editGroupCard(group, width: actualColW)
-                            }
-                        }
-                    }
+        ScrollView {
+            LazyVStack(alignment: .leading, spacing: 24) {
+                ForEach(groups) { group in
+                    editFlatGroup(group)
                 }
-                .padding(outerPad)
-                .frame(maxWidth: .infinity, alignment: .topLeading)
             }
+            .padding(20)
         }
     }
 
-    private func editGroupCard(_ group: TagGroup, width: CGFloat) -> some View {
-        VStack(alignment: .leading, spacing: 6) {
+    private func editFlatGroup(_ group: TagGroup) -> some View {
+        VStack(alignment: .leading, spacing: 0) {
             HStack(spacing: 0) {
                 Rectangle().fill(.secondary.opacity(0.25)).frame(height: 1)
-                    .layoutPriority(0)
                 Text(group.name)
                     .font(.system(size: tagFontSize, weight: .semibold))
                     .foregroundStyle(.secondary)
-                    .lineLimit(1)
-                    .truncationMode(.middle)
                     .padding(.horizontal, 10)
-                    .layoutPriority(1)
                 Rectangle().fill(.secondary.opacity(0.25)).frame(height: 1)
-                    .layoutPriority(0)
             }
+            .padding(.bottom, 6)
+
             LazyVGrid(
-                columns: [GridItem(.adaptive(minimum: iconSize + 28, maximum: iconSize + 64), spacing: 6)],
+                columns: [
+                    GridItem(
+                        .adaptive(
+                            minimum: AppGridItem.stableWidth(iconSize: iconSize),
+                            maximum: AppGridItem.stableWidth(iconSize: iconSize) + 36
+                        ),
+                        spacing: 6
+                    )
+                ],
                 spacing: 2
             ) {
                 ForEach(group.apps) { app in editableAppItem(app) }
             }
         }
-        .frame(maxWidth: width)
-        .padding(16)
-        .background(
-            RoundedRectangle(cornerRadius: 14)
-                .fill(.ultraThinMaterial)
-        )
-        .overlay(
-            RoundedRectangle(cornerRadius: 14)
-                .stroke(Color.primary.opacity(0.08), lineWidth: 1)
-        )
     }
 
     private func selectableTagItem(_ tagName: String) -> some View {
@@ -865,11 +1036,10 @@
     }
 
     private func confirmAssign() {
-        guard !selectedAppPaths.isEmpty, !selectedTagNames.isEmpty else { return }
+        guard !selectedAppPaths.isEmpty else { return }
         let paths = selectedAppPaths.map { $0.path }
-        for tagName in selectedTagNames {
-            TagEditor.assignTag(tagName, color: tagColors[tagName] ?? 0, to: paths)
-        }
+        let tags = sortedTagNames.filter { selectedTagNames.contains($0) }
+        TagEditor.setTags(tags, to: paths)
         selectedAppPaths = []; selectedTagNames = []
         refreshApps()
         withAnimation { successToast = tr("edit.success") }
@@ -882,7 +1052,7 @@
     private func editableAppItem(_ app: AppInfo) -> some View {
         let isSelected = selectedAppPaths.contains(app.path)
         return Button {
-            if isSelected { selectedAppPaths.remove(app.path) } else { selectedAppPaths.insert(app.path) }
+            toggleEditableAppSelection(app)
         } label: {
             VStack(spacing: 4) {
                 ZStack(alignment: .topTrailing) {
@@ -902,6 +1072,33 @@
             .opacity(isSelected ? 1.0 : 0.65)
         }
         .buttonStyle(.plain)
+    }
+
+    private func toggleEditableAppSelection(_ app: AppInfo) {
+        if selectedAppPaths.contains(app.path) {
+            selectedAppPaths.remove(app.path)
+        } else {
+            selectedAppPaths.insert(app.path)
+        }
+        syncSelectedTagsFromSelectedApps()
+    }
+
+    private func syncSelectedTagsFromSelectedApps() {
+        let selectedApps = allApps.filter { selectedAppPaths.contains($0.path) }
+        guard !selectedApps.isEmpty else {
+            selectedTagNames = []
+            return
+        }
+
+        let editableTags = Set(sortedTagNames)
+        if selectedApps.count == 1 {
+            selectedTagNames = Set(selectedApps[0].tags.filter { editableTags.contains($0) })
+            return
+        }
+
+        selectedTagNames = selectedApps.reduce(into: Set<String>()) { result, app in
+            result.formUnion(app.tags.filter { editableTags.contains($0) })
+        }
     }
 
     // MARK: - Computed
@@ -942,16 +1139,113 @@
     }
 
     private func fillColorlessContainer(_ id: String) {
-        guard displayMode == "container" else { return }
+        guard isColorlessContainerMode else { return }
         filledColorlessContainer = id
     }
 
     private func toggleColorlessFill(_ id: String) {
-        guard displayMode == "container" else { return }
+        guard isColorlessContainerMode else { return }
         filledColorlessContainer = (filledColorlessContainer == id) ? nil : id
     }
 
-    func refreshApps() {
+    private func handleAppDrop(_ providers: [NSItemProvider], targetTag: String) -> Bool {
+        guard let provider = providers.first(where: { $0.hasItemConformingToTypeIdentifier(UTType.plainText.identifier) }) else {
+            return false
+        }
+        provider.loadItem(forTypeIdentifier: UTType.plainText.identifier, options: nil) { item, _ in
+            let text: String?
+            if let data = item as? Data {
+                text = String(data: data, encoding: .utf8)
+            } else if let string = item as? String {
+                text = string
+            } else if let string = item as? NSString {
+                text = string as String
+            } else {
+                text = nil
+            }
+            guard let text else { return }
+            let parts = text.components(separatedBy: "\n")
+            guard let path = parts.first, !path.isEmpty else { return }
+            let source = parts.dropFirst().first ?? ""
+            let copy = NSEvent.modifierFlags.contains(.option)
+            DispatchQueue.main.async {
+                dropApp(path: path, sourceTag: source, targetTag: targetTag, copy: copy)
+            }
+        }
+        return true
+    }
+
+    private func dropApp(path: String, sourceTag: String, targetTag: String, copy: Bool) {
+        appDragModeActive = false
+        guard !isSystemDefaultDropTarget(targetTag) else {
+            showDropWarning()
+            return
+        }
+        guard tagColors[targetTag] != nil else { return }
+        guard sourceTag != targetTag || copy else { return }
+        TagEditor.moveApp(
+            path: path,
+            from: sourceTag,
+            to: targetTag,
+            color: tagColors[targetTag] ?? 0,
+            copy: copy
+        )
+        showDropRefresh()
+        refreshApps(forceLayoutRefresh: true)
+    }
+
+    private func isSystemDefaultDropTarget(_ targetTag: String) -> Bool {
+        let defaultNames = [
+            defaultGroupName,
+            tr("group.uncategorized"),
+            "Mac自带",
+            tr("group.appleBuiltIn")
+        ]
+        return defaultNames.contains(targetTag)
+    }
+
+    private func showDropWarning() {
+        withAnimation(.spring(response: 0.24, dampingFraction: 0.82)) {
+            dropWarningToast = tr("drop.systemDefaultWarning")
+        }
+        DispatchQueue.main.asyncAfter(deadline: .now() + 1.6) {
+            withAnimation(.easeOut(duration: 0.18)) {
+                dropWarningToast = nil
+            }
+        }
+    }
+
+    private func showDropRefresh() {
+        dropRefreshStartedAt = Date()
+        withAnimation(.spring(response: 0.22, dampingFraction: 0.82)) {
+            dropRefreshVisible = true
+        }
+    }
+
+    private func finishDropRefreshAfterMinimumDuration() {
+        let minimumDuration: TimeInterval = 0.85
+        let elapsed = dropRefreshStartedAt.map { Date().timeIntervalSince($0) } ?? minimumDuration
+        let delay = max(0, minimumDuration - elapsed)
+        DispatchQueue.main.asyncAfter(deadline: .now() + delay) {
+            withAnimation(.easeOut(duration: 0.18)) {
+                dropRefreshVisible = false
+            }
+            dropRefreshStartedAt = nil
+        }
+    }
+
+    private func setAppDragMode(_ active: Bool) {
+        appDragModeActive = active
+        if active {
+            DispatchQueue.main.asyncAfter(deadline: .now() + 8) {
+                if appDragModeActive {
+                    appDragModeActive = false
+                }
+            }
+        }
+    }
+
+    func refreshApps(forceLayoutRefresh: Bool = false) {
         DispatchQueue.global(qos: .userInitiated).async {
             var apps = AppIndexer.scan()
             let store = TagDatabase.load()
@@ -962,13 +1256,31 @@
                 allApps = apps
                 tagColors = colors
                 draggedTagNames = order
+                if forceLayoutRefresh {
+                    withAnimation(.spring(response: 0.28, dampingFraction: 0.86)) {
+                        layoutRefreshID = UUID()
+                    }
+                    finishDropRefreshAfterMinimumDuration()
+                }
             }
         }
     }
 
     func openApp(_ app: AppInfo) {
+        appDragModeActive = false
         hideOverlay()
-        NSWorkspace.shared.open(app.path)
+        if let bundleIdentifier = app.bundleIdentifier {
+            NSWorkspace.shared.launchApplication(
+                withBundleIdentifier: bundleIdentifier,
+                options: [],
+                additionalEventParamDescriptor: nil,
+                launchIdentifier: nil
+            )
+            return
+        }
+
+        let configuration = NSWorkspace.OpenConfiguration()
+        NSWorkspace.shared.openApplication(at: app.path, configuration: configuration)
     }
 }
 

--
Gitblit v1.9.3