feat: allow manual entry of glob patterns for trusted image senders (#480)

lib/core/sieve/sieve_interpreter.dart

@@ -1,6 +1,7 @@
 import 'package:sharedinbox/core/sieve/sieve_actions.dart';
 import 'package:sharedinbox/core/sieve/sieve_conditions.dart';
 import 'package:sharedinbox/core/sieve/sieve_rule.dart';
+import 'package:sharedinbox/core/utils/glob_match.dart';
 
 /// A lightweight email representation used by [SieveInterpreter].
 /// Header names are lower-cased.
@@ -102,18 +103,11 @@ class SieveInterpreter {
     return switch (matchType) {
       ':contains' => k.isEmpty || v.contains(k),
       ':is' => v == k,
-      ':matches' => _globMatch(v, k),
+      ':matches' => globMatch(v, k),
       _ => false,
     };
   }
 
-  bool _globMatch(String value, String pattern) {
-    final regexStr = RegExp.escape(
-      pattern,
-    ).replaceAll(r'\*', '.*').replaceAll(r'\?', '.');
-    return RegExp('^$regexStr\$').hasMatch(value);
-  }
-
   void _applyActions(List<SieveAction> actions, SieveExecutionContext ctx) {
     for (final action in actions) {
       switch (action) {

lib/core/utils/glob_match.dart

@@ -0,0 +1,9 @@
+/// Returns true if [value] matches the glob [pattern].
+///
+/// Supports `*` (any number of characters) and `?` (exactly one character).
+/// The comparison is case-insensitive, which is appropriate for email addresses.
+bool globMatch(String value, String pattern) {
+  final regexStr =
+      RegExp.escape(pattern).replaceAll(r'\*', '.*').replaceAll(r'\?', '.');
+  return RegExp('^$regexStr\$', caseSensitive: false).hasMatch(value);
+}

lib/ui/screens/email_detail_screen.dart

@@ -16,6 +16,7 @@ import 'package:sharedinbox/core/models/note.dart';
 import 'package:sharedinbox/core/models/undo_action.dart';
 import 'package:sharedinbox/core/models/user_preferences.dart';
 import 'package:sharedinbox/core/utils/format_utils.dart';
+import 'package:sharedinbox/core/utils/glob_match.dart';
 import 'package:sharedinbox/core/utils/html_utils.dart';
 import 'package:sharedinbox/di.dart';
 import 'package:sharedinbox/ui/screens/email_action_helpers.dart';
@@ -208,8 +209,8 @@ class _EmailDetailScreenState extends ConsumerState<EmailDetailScreen> {
     final senderEmail = header?.from.isNotEmpty == true
         ? header!.from.first.email.toLowerCase()
         : null;
-    final isTrusted =
-        senderEmail != null && trustedSenders.contains(senderEmail);
+    final isTrusted = senderEmail != null &&
+        trustedSenders.any((p) => globMatch(senderEmail, p));
     final effectiveLoadImages = _loadRemoteImages || isTrusted;
 
     return ListView(

lib/ui/screens/thread_detail_screen.dart

@@ -8,6 +8,7 @@ import 'package:intl/intl.dart';
 import 'package:sharedinbox/core/models/email.dart';
 import 'package:sharedinbox/core/models/undo_action.dart';
 import 'package:sharedinbox/core/models/user_preferences.dart';
+import 'package:sharedinbox/core/utils/glob_match.dart';
 import 'package:sharedinbox/core/utils/html_utils.dart';
 import 'package:sharedinbox/di.dart';
 import 'package:sharedinbox/ui/widgets/secure_email_webview.dart';
@@ -118,8 +119,8 @@ class _EmailMessageCardState extends ConsumerState<_EmailMessageCard> {
     final senderEmail = widget.email.from.isNotEmpty
         ? widget.email.from.first.email.toLowerCase()
         : null;
-    final isTrusted =
-        senderEmail != null && trustedSenders.contains(senderEmail);
+    final isTrusted = senderEmail != null &&
+        trustedSenders.any((p) => globMatch(senderEmail, p));
 
     return Card(
       margin: const EdgeInsets.symmetric(vertical: 4),

lib/ui/screens/trusted_image_senders_screen.dart

@@ -16,6 +16,11 @@ class TrustedImageSendersScreen extends ConsumerWidget {
 
     return Scaffold(
       appBar: AppBar(title: const Text('Allowed addresses for images')),
+      floatingActionButton: FloatingActionButton(
+        tooltip: 'Add address',
+        onPressed: () => _showAddDialog(context, ref),
+        child: const Icon(Icons.add),
+      ),
       body: trustedSendersAsync.when(
         loading: () => const Center(child: CircularProgressIndicator()),
         error: (_, __) =>
@@ -26,7 +31,8 @@ class TrustedImageSendersScreen extends ConsumerWidget {
               padding: EdgeInsets.all(16),
               child: Text(
                 'No addresses added yet. '
-                'Tap "Load remote images" in an email to add the sender.',
+                'Tap + to add an address or pattern (e.g. *@example.com), '
+                'or tap "Load remote images" in an email to add the sender automatically.',
               ),
             );
           }
@@ -60,4 +66,61 @@ class TrustedImageSendersScreen extends ConsumerWidget {
       ),
     );
   }
+
+  Future<void> _showAddDialog(BuildContext context, WidgetRef ref) async {
+    final controller = TextEditingController();
+
+    await showDialog<void>(
+      context: context,
+      builder: (ctx) {
+        return StatefulBuilder(
+          builder: (ctx, setState) {
+            return AlertDialog(
+              title: const Text('Add allowed address'),
+              content: TextField(
+                controller: controller,
+                autofocus: true,
+                keyboardType: TextInputType.emailAddress,
+                decoration: const InputDecoration(
+                  labelText: 'Email address or pattern',
+                  hintText: '*@example.com',
+                  helperText: '* matches any characters, e.g. *@example.com',
+                ),
+                onChanged: (_) => setState(() {}),
+                onSubmitted: (value) {
+                  if (value.trim().isNotEmpty) {
+                    _addSender(ref, value);
+                    Navigator.of(ctx).pop();
+                  }
+                },
+              ),
+              actions: [
+                TextButton(
+                  onPressed: () => Navigator.of(ctx).pop(),
+                  child: const Text('Cancel'),
+                ),
+                TextButton(
+                  onPressed: controller.text.trim().isEmpty
+                      ? null
+                      : () {
+                          _addSender(ref, controller.text);
+                          Navigator.of(ctx).pop();
+                        },
+                  child: const Text('Add'),
+                ),
+              ],
+            );
+          },
+        );
+      },
+    );
+  }
+
+  void _addSender(WidgetRef ref, String value) {
+    unawaited(
+      ref
+          .read(userPreferencesRepositoryProvider)
+          .addTrustedImageSender(value.trim()),
+    );
+  }
 }