Begin to add the web interface page

lib/pages/WebMainPage.dart

@@ -0,0 +1,128 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/widgets.dart';
+import 'package:libacflutter/Constants.dart';
+import 'package:timetrack/consts.dart';
+import 'package:timetrack/data.dart';
+
+class WebMain extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() {
+    return _WebMain();
+  }
+}
+
+class _WebMain extends State<WebMain> {
+  TextEditingController sessionIDController = TextEditingController();
+
+  @override
+  void didChangeDependencies() {
+    sessionIDController.text = SessionData.LastSessionID;
+    super.didChangeDependencies();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("Time Tracker"),
+        backgroundColor: LibACFlutterConstants.TITLEBAR_COLOR,
+      ),
+      drawer: Drawer(
+        elevation: 8,
+        child: SingleChildScrollView(
+          child: Column(
+            children: [
+              DrawerHeader(
+                child: Column(
+                  children: [
+                    Text("Time Tracker"),
+                    Text("Created by Tara Piccari"),
+                    Text("Copyright 2025 - Present"),
+                    Text("Version: ${TTConsts.VERSION}"),
+                  ],
+                ),
+              ),
+              if (SessionData.IsReadOnly)
+                ListTile(
+                  title: Text("Trip Map"),
+                  leading: Icon(Icons.map),
+                  subtitle: Text(
+                    "View a map of the route\n(NOTE: This is not live, and reflects the current state as of the time the map is opened.)",
+                  ),
+                  onTap: () async {
+                    await Navigator.pushNamed(context, "/map");
+                  },
+                ),
+              if (SessionData.IsReadOnly)
+                ListTile(
+                  title: Text("Work Data"),
+                  subtitle: Text("View work data"),
+                  leading: Icon(Icons.work_history),
+                  onTap: () async {
+                    // Open up the work data viewer and editor.
+                    // Edit will be disabled for web or read only mode.
+                    await Navigator.pushNamed(context, "/work");
+                    setState(() {});
+                  },
+                ),
+            ],
+          ),
+        ),
+      ),
+      body: Padding(
+        padding: EdgeInsets.all(8),
+        child: SingleChildScrollView(
+          child: Column(
+            children: [
+              // Start doing magic!
+              if (SessionData.DisplayError.isNotEmpty)
+                Text(SessionData.DisplayError, style: TextStyle(fontSize: 18)),
+              // Check what widgets need to be displayed.
+              if (SessionData.IsReadOnly) GetReadOnlyWidgets(),
+              if (!SessionData.IsReadOnly) GetLoadWidgets(),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget GetReadOnlyWidgets() {
+    return Column(
+      children: [
+        Text(
+          "Use the top left menu to show the various pages for the data viewer.",
+        ),
+        ElevatedButton(
+          onPressed: () async {
+            SessionData.IsReadOnly = false;
+            SessionData.Trips = [];
+            SessionData.positions = [];
+            SessionData.DisplayError = "";
+          },
+          child: Text("Close Session"),
+        ),
+      ],
+    );
+  }
+
+  Widget GetLoadWidgets() {
+    return Column(
+      children: [
+        // Present a text box for the session ID, and a button for loading.
+        ListTile(title: Text("Session ID")),
+        TextField(
+          controller: sessionIDController,
+          decoration: InputDecoration(border: OutlineInputBorder()),
+        ),
+        ElevatedButton(
+          onPressed: () async {
+            await SessionData.DownloadData();
+            setState(() {});
+          },
+          child: Text("Load Session", style: TextStyle(fontSize: 18)),
+        ),
+      ],
+    );
+  }
+}