Add lead workflows, PDF signing, AR projects and photo gallery integration

GasTankAR/Views/Leads/Detail/LeadDetailView.swift

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+import SwiftUI
+import SwiftData
+
+struct LeadDetailView: View {
+    let detail: LeadDetail
+    let model: LeadDetailViewModel
+    let salesCode: String
+    let repository: any LeadDetailRepository
+    let onLogout: () -> Void
+    @State private var showsARProjects = false
+    @State private var galleryRevision = 0
+
+    var body: some View {
+        LeadDetailPageLayout {
+            LeadDetailHeaderView(detail: detail, canStartAR: true, onStartAR: { showsARProjects = true })
+        } left: {
+            VStack(spacing: 28) {
+                LeadContactSection(detail: detail)
+                LeadLocationSection(name: detail.lead.displayName, address: detail.lead.address)
+            }
+        } right: {
+            VStack(spacing: 28) {
+                LeadOffersSection(offers: detail.offers, model: model)
+                LeadPhotoGallerySection(photos: detail.photos, leadID: detail.lead.id,
+                                        salesCode: salesCode, repository: repository, onLogout: onLogout,
+                                        refreshID: galleryRevision)
+            }
+        }
+        .sheet(isPresented: $showsARProjects, onDismiss: { galleryRevision += 1 }) {
+            LeadARProjectsSheet(detail: detail)
+        }
+    }
+}
+
+struct LeadDetailPageLayout<Header: View, Left: View, Right: View>: View {
+    let header: Header
+    let left: Left
+    let right: Right
+    @Environment(\.dynamicTypeSize) private var dynamicTypeSize
+
+    init(@ViewBuilder header: () -> Header, @ViewBuilder left: () -> Left,
+         @ViewBuilder right: () -> Right) {
+        self.header = header()
+        self.left = left()
+        self.right = right()
+    }
+
+    var body: some View {
+        GeometryReader { geometry in
+            ScrollView {
+                VStack(alignment: .leading, spacing: 28) {
+                    header
+                    if geometry.size.width >= 900 && !dynamicTypeSize.isAccessibilitySize {
+                        HStack(alignment: .top, spacing: 24) {
+                            left.frame(width: (geometry.size.width - 72) * 0.34)
+                            right.frame(maxWidth: .infinity)
+                        }
+                    } else {
+                        left
+                        right
+                    }
+                }
+                .padding(24)
+            }
+            .background(LeadDetailStyle.background.ignoresSafeArea())
+        }
+    }
+}