Apptag/ContentView.swift
@@ -392,52 +392,86 @@
    private var containerGrid: some View {
        GeometryReader { geo in
            let availableWidth = geo.size.width - 40  // padding
            let spacing: CGFloat = 16
            let containerMin: CGFloat = 320
            let colCount = max(1, Int((availableWidth + spacing) / (containerMin + spacing)))
            let cols = Array(repeating: GridItem(.flexible(), spacing: spacing), count: colCount)
            let outerPad: CGFloat = 20
            let gap: CGFloat = 16
            let available = geo.size.width - outerPad * 2
            let colW: CGFloat = 280
            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 {
                LazyVGrid(columns: cols, alignment: .leading, spacing: spacing) {
                    ForEach(groups) { group in
                        VStack(alignment: .leading, spacing: 6) {
                            // Group header
                            HStack(spacing: 0) {
                                Rectangle().fill(.secondary.opacity(0.25)).frame(height: 1)
                                Text(group.name)
                                    .font(.system(size: tagFontSize, weight: .semibold))
                                    .foregroundStyle(.secondary)
                                    .padding(.horizontal, 10)
                                Rectangle().fill(.secondary.opacity(0.25)).frame(height: 1)
                            }
                            // App grid — adaptive inside the container
                            let itemSize = iconSize + 28
                            LazyVGrid(
                                columns: [GridItem(.adaptive(minimum: itemSize, maximum: itemSize + 36), spacing: 6)],
                                spacing: 2
                            ) {
                                ForEach(group.apps) { app in
                                    AppGridItem(app: app, iconSize: iconSize, onSelect: { openApp(app) })
                                }
                HStack(alignment: .top, spacing: gap) {
                    ForEach(0..<colCount, id: \.self) { ci in
                        LazyVStack(spacing: gap) {
                            ForEach(columns[ci]) { group in
                                masonryCard(group, width: actualColW)
                                    .id(group.id)
                            }
                        }
                        .id(group.id)
                        .padding(16)
                        .background(
                            RoundedRectangle(cornerRadius: 14)
                                .fill(.ultraThinMaterial)
                        )
                        .overlay(
                            RoundedRectangle(cornerRadius: 14)
                                .stroke(Color.primary.opacity(0.08), lineWidth: 1)
                        )
                    }
                }
                .padding(20)
                .padding(outerPad)
            }
        }
    }
    /// Distribute groups to the shortest column.
    private func distributeToColumns(groups: [TagGroup], colCount: Int, colWidth: CGFloat) -> [[TagGroup]] {
        var cols = Array(repeating: [TagGroup](), count: colCount)
        var h = Array(repeating: CGFloat(0), count: colCount)
        for g in groups {
            let est = estimatedCardHeight(g, width: colWidth)
            let ci = h.firstIndex(of: h.min()!)!
            cols[ci].append(g)
            h[ci] += est + 16
        }
        return cols
    }
    private func estimatedCardHeight(_ group: TagGroup, width: CGFloat) -> CGFloat {
        let inner = width - 32
        let itemW = iconSize + 28 + 6
        let perRow = max(1, Int(inner / itemW))
        let rows = (group.apps.count + perRow - 1) / perRow
        return 32 + CGFloat(rows) * (iconSize + 30)
    }
    private func masonryCard(_ group: TagGroup, width: CGFloat) -> some View {
        VStack(alignment: .leading, spacing: 6) {
            HStack(spacing: 0) {
                Rectangle().fill(.secondary.opacity(0.25)).frame(height: 1)
                Text(group.name)
                    .font(.system(size: tagFontSize, weight: .semibold))
                    .foregroundStyle(.secondary)
                    .lineLimit(1)
                    .truncationMode(.middle)
                    .padding(.horizontal, 10)
                Rectangle().fill(.secondary.opacity(0.25)).frame(height: 1)
            }
            let itemSize = iconSize + 28
            LazyVGrid(
                columns: [GridItem(.adaptive(minimum: itemSize, maximum: itemSize + 36), spacing: 6)],
                spacing: 2
            ) {
                ForEach(group.apps) { app in
                    AppGridItem(app: app, iconSize: iconSize, onSelect: { openApp(app) })
                }
            }
        }
        .frame(maxWidth: width)
        .padding(16)
        .background(
            RoundedRectangle(cornerRadius: 14)
                .fill(.ultraThinMaterial)
        )
        .overlay(
            RoundedRectangle(cornerRadius: 14)
                .stroke(Color.primary.opacity(0.08), lineWidth: 1)
        )
    }
    // MARK: - Edit Tags View
    private var editTagsView: some View {