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 +34,54 @@ 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();
+            }
+        }
+    }
+
+    // Only check for number matches if search pattern contains numbers
+    QRegularExpression searchNumberCheck("\\d+");
+    if (searchNumberCheck.match(searchPatternDelBlank).hasMatch()) {
+        QRegularExpression numberRegex("\\d+");
+        QRegularExpressionMatchIterator matches = numberRegex.globalMatch(displayName);
+        bool hasNumberMatch = false;
+
+        while (matches.hasNext()) {
+            QRegularExpressionMatch match = matches.next();
+            QString numberInDisplayName = match.captured(0);
+            hasNumberMatch = true;
+            if (numberInDisplayName.startsWith(searchPatternDelBlank)) {
+                return true;
+            }
+        }
+        
+        // If there are numbers but none match the pattern
+        if (hasNumberMatch) {
+            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);
 }