feat: harden geofence and distance diagnostics

lib/widgets/build_info_text.dart

@@ -3,14 +3,50 @@ import 'package:flutter/material.dart';
 import '../app/build_info.dart';
 
 class BuildInfoText extends StatelessWidget {
-  const BuildInfoText({super.key});
+  final bool compact;
+  final bool alignStart;
+
+  const BuildInfoText({
+    super.key,
+    this.compact = true,
+    this.alignStart = false,
+  });
 
   @override
   Widget build(BuildContext context) {
-    return Text(
-      BuildInfo.label,
-      textAlign: TextAlign.center,
-      style: const TextStyle(color: Colors.white24, fontSize: 10),
+    final alignment = alignStart
+        ? CrossAxisAlignment.start
+        : CrossAxisAlignment.center;
+    final textAlign = alignStart ? TextAlign.left : TextAlign.center;
+
+    if (compact) {
+      return Text(
+        BuildInfo.label,
+        textAlign: textAlign,
+        style: const TextStyle(color: Colors.white24, fontSize: 10),
+      );
+    }
+
+    return Column(
+      crossAxisAlignment: alignment,
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        Text(
+          BuildInfo.hasMetadata ? BuildInfo.shortSha : 'build info unavailable',
+          textAlign: textAlign,
+          style: const TextStyle(
+            color: Colors.white54,
+            fontSize: 11,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+        const SizedBox(height: 2),
+        Text(
+          BuildInfo.hasMetadata ? BuildInfo.formattedDate : '',
+          textAlign: textAlign,
+          style: const TextStyle(color: Colors.white24, fontSize: 10),
+        ),
+      ],
     );
   }
 }