feat(contact): add contact picker functionality for selecting Indian phone numbers

lib/helpers/utils/contact_picker_helper.dart

@@ -0,0 +1,90 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_contacts/flutter_contacts.dart';
+import 'package:permission_handler/permission_handler.dart';
+import 'package:marco/helpers/widgets/my_snackbar.dart';
+import 'package:marco/helpers/services/app_logger.dart';
+
+class ContactPickerHelper {
+  static Future<String?> pickIndianPhoneNumber(BuildContext context) async {
+    final status = await Permission.contacts.request();
+
+    if (!status.isGranted) {
+      if (status.isPermanentlyDenied) {
+        await openAppSettings();
+      }
+
+      showAppSnackbar(
+        title: "Permission Required",
+        message:
+            "Please allow Contacts permission from settings to pick a contact.",
+        type: SnackbarType.warning,
+      );
+      return null;
+    }
+
+    try {
+      final picked = await FlutterContacts.openExternalPick();
+      if (picked == null) return null;
+
+      final contact =
+          await FlutterContacts.getContact(picked.id, withProperties: true);
+      if (contact == null || contact.phones.isEmpty) {
+        showAppSnackbar(
+          title: "No Phone Number",
+          message: "Selected contact has no phone number.",
+          type: SnackbarType.warning,
+        );
+        return null;
+      }
+
+      final indiaPhones = contact.phones.where((p) {
+        final normalized = p.number.replaceAll(RegExp(r'[^0-9+]'), '');
+        return normalized.startsWith('+91') || RegExp(r'^\d{10}$').hasMatch(normalized);
+      }).toList();
+
+      if (indiaPhones.isEmpty) {
+        showAppSnackbar(
+          title: "No Indian Number",
+          message: "Selected contact has no Indian (+91) phone number.",
+          type: SnackbarType.warning,
+        );
+        return null;
+      }
+
+      if (indiaPhones.length == 1) {
+        return _normalizeNumber(indiaPhones.first.number);
+      }
+
+      return await showDialog<String>(
+        context: context,
+        builder: (ctx) => AlertDialog(
+          title: const Text("Choose a number"),
+          content: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: indiaPhones
+                .map((p) => ListTile(
+                      title: Text(p.number),
+                      onTap: () => Navigator.of(ctx).pop(_normalizeNumber(p.number)),
+                    ))
+                .toList(),
+          ),
+        ),
+      );
+    } catch (e, st) {
+      logSafe("Error picking contact", level: LogLevel.error, error: e, stackTrace: st);
+      showAppSnackbar(
+        title: "Error",
+        message: "Failed to fetch contact.",
+        type: SnackbarType.error,
+      );
+      return null;
+    }
+  }
+
+  static String _normalizeNumber(String raw) {
+    final normalized = raw.replaceAll(RegExp(r'[^0-9]'), '');
+    return normalized.length > 10
+        ? normalized.substring(normalized.length - 10)
+        : normalized;
+  }
+}

lib/model/directory/add_contact_bottom_sheet.dart

@@ -7,6 +7,7 @@ import 'package:marco/helpers/widgets/my_spacing.dart';
 import 'package:marco/helpers/widgets/my_text.dart';
 import 'package:marco/helpers/widgets/my_text_style.dart';
 import 'package:marco/model/directory/contact_model.dart';
+import 'package:marco/helpers/utils/contact_picker_helper.dart';
 
 class AddContactBottomSheet extends StatefulWidget {
   final ContactModel? existingContact;
@@ -184,8 +185,23 @@ class _AddContactBottomSheetState extends State<AddContactBottomSheet> {
                 inputFormatters: inputType == TextInputType.phone
                     ? [FilteringTextInputFormatter.digitsOnly]
                     : [],
-                decoration: _inputDecoration("Enter $inputLabel")
-                    .copyWith(counterText: ""),
+                decoration: _inputDecoration("Enter $inputLabel").copyWith(
+                  counterText: "",
+                  suffixIcon: inputType == TextInputType.phone
+                      ? IconButton(
+                          icon: const Icon(Icons.contact_phone,
+                              color: Colors.blue),
+                          onPressed: () async {
+                            final selectedPhone =
+                                await ContactPickerHelper.pickIndianPhoneNumber(
+                                    context);
+                            if (selectedPhone != null) {
+                              controller.text = selectedPhone;
+                            }
+                          },
+                        )
+                      : null,
+                ),
                 validator: (value) {
                   if (value == null || value.trim().isEmpty)
                     return "$inputLabel is required";
@@ -195,7 +211,6 @@ class _AddContactBottomSheetState extends State<AddContactBottomSheet> {
                       return "Enter valid phone number";
                     }
                   }
-
                   if (inputType == TextInputType.emailAddress &&
                       !RegExp(r'^[\w.-]+@([\w-]+\.)+[\w-]{2,4}$')
                           .hasMatch(trimmed)) {