Working spreadsheet view, pending UI updates

LabWise/InventoryView.swift

@@ -47,6 +47,7 @@ struct InventoryView: View {
     @State private var addMode: AddMode?
     @State private var isSelectMode = false
     @State private var selectedIDs: Set<String> = []
+    @State private var showSpreadsheet = false
 
     enum AddMode: String, Identifiable {
         case manual, scan
@@ -141,6 +142,13 @@ struct InventoryView: View {
                         .disabled(selectedIDs.isEmpty)
                     }
                 } else {
+                    ToolbarItem(placement: .topBarLeading) {
+                        Button {
+                            showSpreadsheet = true
+                        } label: {
+                            Image(systemName: "tablecells")
+                        }
+                    }
                     ToolbarItem(placement: .topBarTrailing) {
                         Menu {
                             Button {
@@ -184,5 +192,10 @@ struct InventoryView: View {
         .task {
             await viewModel.loadChemicals()
         }
+        .fullScreenCover(isPresented: $showSpreadsheet) {
+            SpreadsheetView(chemicals: viewModel.chemicals) {
+                showSpreadsheet = false
+            }
+        }
     }
 }