feat: add Support for acronym matching and others.

add Support for acronym matching,
add Intermediate matching is not supported for lowercase letters.

Log:

Author: wjyrich

src/models/searchfilterproxymodel.cpp

@@ -34,5 +34,43 @@ bool SearchFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &
 
     QString searchPatternDelBlank = searchPattern.pattern().toLower().remove(" ");
 
-    return displayName.contains(searchPatternDelBlank) || nameCopy.contains(searchPatternDelBlank) || transliterated.contains(searchPatternDelBlank) || jianpin.contains(searchPatternDelBlank);
+    // Get first letters of each word in displayName
+    QStringList words = displayName.split(" ", Qt::SkipEmptyParts);
+    QString nameFirstLetters;
+    for (const QString &word : words) {
+        if (!word.isEmpty()) {
+            QChar firstChar = word[0];
+            if (firstChar.isLetter()) {
+                nameFirstLetters += firstChar.toLower();
+            }
+        }
+    }
+
+    // Check if search pattern starts with numbers
+    QRegularExpression numberRegex("\\d+");
+    QRegularExpressionMatch match = numberRegex.match(displayName);
+    if (match.hasMatch()) {
+        QString numberInDisplayName = match.captured(0);
+        if (numberInDisplayName.startsWith(searchPatternDelBlank)) {
+            return true;
+        }
+        return false;
+    }
+
+    // Check if displayName contains only English letters
+    QRegularExpression englishOnly("^[a-z\\s]+$");
+    bool isPureEnglish = englishOnly.match(displayName).hasMatch();
+    if (isPureEnglish) {
+        return displayName.startsWith(searchPatternDelBlank) || 
+               nameCopy.startsWith(searchPatternDelBlank) || 
+               transliterated.startsWith(searchPatternDelBlank) || 
+               jianpin.startsWith(searchPatternDelBlank) ||
+               nameFirstLetters.startsWith(searchPatternDelBlank);
+    }
+
+    return displayName.contains(searchPatternDelBlank) || 
+           nameCopy.contains(searchPatternDelBlank) || 
+           transliterated.contains(searchPatternDelBlank) || 
+           jianpin.contains(searchPatternDelBlank) ||
+           nameFirstLetters.contains(searchPatternDelBlank);
 }