fix: preserve AND tag operator during search and suggestion draft completions (v2.0.10)

lib/app/app_version.dart

@@ -1,3 +1,3 @@
-const appDisplayVersion = '2.0.9';
-const appBuildNumber = 31;
+const appDisplayVersion = '2.0.10';
+const appBuildNumber = 32;
 const appReleaseChannel = 'Stable';

lib/app/changelog.dart

@@ -1,4 +1,14 @@
 const lunarisChangelog = [
+  LunarisChange(
+    version: '2.0.10',
+    title: 'Fix "and" Tag Operator Retention, Suggestion Preceding Drafts & AND Chip Styling',
+    bullets: [
+      'Fixed "and" operator disappearing when submitting search or applying autocompletions.',
+      'Preserved preceding draft tokens (e.g. typing "cat and d" then picking "dog" now retains "cat", "AND", and "dog").',
+      'Supported multiple "and" separators without accidental deduplication.',
+      'Distinct visual styling for AND separator chips with secondary theme container and alt-route icon.',
+    ],
+  ),
   LunarisChange(
     version: '2.0.9',
     title: 'Instant Tag Suggestions, Persistent Disk Cache, Expanded History & Match Highlighting',

lib/backend/services/search_service.dart

@@ -28,13 +28,15 @@ class SearchService {
   }
 
   List<String> parseTags(String query) {
-    return query
-        .trim()
-        .split(RegExp(r'\s+'))
-        .map(sanitizeToken)
-        .where((tag) => tag.isNotEmpty && tag != 'and')
-        .toSet()
-        .toList();
+    final seen = <String>{};
+    final result = <String>[];
+    for (final raw in query.trim().split(RegExp(r'\s+'))) {
+      final tag = raw.trim();
+      if (tag.isEmpty) continue;
+      if (tag.toLowerCase() != 'and' && !seen.add(tag.toLowerCase())) continue;
+      result.add(tag);
+    }
+    return result;
   }
 
   Future<Result<void>> saveSearch(

lib/shared/widgets/app_search_bar.dart

@@ -242,18 +242,34 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
 
   Widget _buildTagChip(BuildContext context, String tag) {
     final scheme = Theme.of(context).colorScheme;
+    final isAnd = tag.toLowerCase() == 'and';
     return InputChip(
-      label: Text(tag),
-      avatar: const Icon(Icons.tag_rounded, size: 16),
+      label: Text(
+        isAnd ? 'AND' : tag,
+        style: TextStyle(
+          color: isAnd
+              ? scheme.onSecondaryContainer
+              : scheme.onPrimaryContainer,
+          fontWeight: isAnd ? FontWeight.w900 : FontWeight.w700,
+          letterSpacing: isAnd ? 0.8 : 0,
+        ),
+      ),
+      avatar: Icon(
+        isAnd ? Icons.alt_route_rounded : Icons.tag_rounded,
+        size: 16,
+        color: isAnd ? scheme.secondary : scheme.primary,
+      ),
       deleteIcon: const Icon(Icons.close_rounded, size: 16),
       onPressed: () => _editTag(tag),
       onDeleted: () => _removeTag(tag),
-      backgroundColor: scheme.primaryContainer.withValues(alpha: 0.54),
-      labelStyle: TextStyle(
-        color: scheme.onPrimaryContainer,
-        fontWeight: FontWeight.w700,
+      backgroundColor: isAnd
+          ? scheme.secondaryContainer.withValues(alpha: 0.7)
+          : scheme.primaryContainer.withValues(alpha: 0.54),
+      side: BorderSide(
+        color: isAnd
+            ? scheme.secondary.withValues(alpha: 0.4)
+            : scheme.primary.withValues(alpha: 0.18),
       ),
-      side: BorderSide(color: scheme.primary.withValues(alpha: 0.18)),
       visualDensity: VisualDensity.compact,
       materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
     );
@@ -306,7 +322,9 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
     _localDirty = true;
     setState(() {
       for (final tag in additions) {
-        if (!_tags.contains(tag)) _tags.add(tag);
+        if (tag.toLowerCase() == 'and' || !_tags.contains(tag)) {
+          _tags.add(tag);
+        }
       }
       _controller.clear();
     });
@@ -359,10 +377,19 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
     _localDirty = true;
     setState(() {
       if (draft.isNotEmpty) {
-        final draftTags = _parseTags(draft);
-        _tags.removeWhere(draftTags.contains);
+        final tokens = _parseTags(draft);
+        if (tokens.isNotEmpty) {
+          final prefixTokens = tokens.sublist(0, tokens.length - 1);
+          for (final token in prefixTokens) {
+            if (token.toLowerCase() == 'and' || !_tags.contains(token)) {
+              _tags.add(token);
+            }
+          }
+        }
+      }
+      if (!_tags.contains(suggestion)) {
+        _tags.add(suggestion);
       }
-      if (!_tags.contains(suggestion)) _tags.add(suggestion);
       _controller.clear();
     });
     _notifyChanged();
@@ -387,7 +414,8 @@ class _TagInputSearchBarState extends State<TagInputSearchBar> {
     final result = <String>[];
     for (final raw in query.trim().split(RegExp(r'\s+'))) {
       final tag = raw.trim();
-      if (tag.isEmpty || !seen.add(tag)) continue;
+      if (tag.isEmpty) continue;
+      if (tag.toLowerCase() != 'and' && !seen.add(tag.toLowerCase())) continue;
       result.add(tag);
     }
     return result;