diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9321a67..b8bd994 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,6 +29,7 @@ find_package(Qt6 REQUIRED COMPONENTS
     Core
     Gui
     Widgets
+    Concurrent
 )
 
 qt_standard_project_setup()
diff --git a/resources/BareCode.ico b/resources/BareCode.ico
index 0cae478..10ecf22 100644
Binary files a/resources/BareCode.ico and b/resources/BareCode.ico differ
diff --git a/resources/icon_128.png b/resources/icon_128.png
index 8af0c1b..bb49b56 100644
Binary files a/resources/icon_128.png and b/resources/icon_128.png differ
diff --git a/resources/icon_16.png b/resources/icon_16.png
index ef73abe..7cba1e4 100644
Binary files a/resources/icon_16.png and b/resources/icon_16.png differ
diff --git a/resources/icon_24.png b/resources/icon_24.png
new file mode 100644
index 0000000..67356ff
Binary files /dev/null and b/resources/icon_24.png differ
diff --git a/resources/icon_256.png b/resources/icon_256.png
index c890237..f18f69f 100644
Binary files a/resources/icon_256.png and b/resources/icon_256.png differ
diff --git a/resources/icon_32.png b/resources/icon_32.png
index 8f82923..5982252 100644
Binary files a/resources/icon_32.png and b/resources/icon_32.png differ
diff --git a/resources/icon_48.png b/resources/icon_48.png
index 3ddc136..b792afe 100644
Binary files a/resources/icon_48.png and b/resources/icon_48.png differ
diff --git a/resources/icon_512.png b/resources/icon_512.png
index 5019bd9..5b843e5 100644
Binary files a/resources/icon_512.png and b/resources/icon_512.png differ
diff --git a/resources/icon_64.png b/resources/icon_64.png
index ca5de95..1025e84 100644
Binary files a/resources/icon_64.png and b/resources/icon_64.png differ
diff --git a/src/core/MainWindow.cpp b/src/core/MainWindow.cpp
index d45ce0c..37d588f 100644
--- a/src/core/MainWindow.cpp
+++ b/src/core/MainWindow.cpp
@@ -35,6 +35,12 @@ MainWindow::MainWindow(QWidget *parent)
     {
         m_projectManager->openProject(lastPath);
     }
+
+    // Letzte Session wiederherstellen (geöffnete Dateien + aktiver Tab)
+    m_editor->restoreSession(
+        m_settings->lastOpenFiles(),
+        m_settings->lastActiveFile()
+    );
 }
 
 MainWindow::~MainWindow() = default;
@@ -110,6 +116,9 @@ void MainWindow::setupMenuBar()
     m_actSearch = mBearbeiten->addAction(tr("&Suchen / Ersetzen…"), this, &MainWindow::onShowSearch);
     m_actSearch->setShortcut(QKeySequence::Find);
 
+    m_actFileSearch = mBearbeiten->addAction(tr("In &Dateien suchen…"), this, &MainWindow::onShowFileSearch);
+    m_actFileSearch->setShortcut(Qt::CTRL | Qt::SHIFT | Qt::Key_F);
+
     // ---- Ansicht ----
     QMenu *mAnsicht = menuBar()->addMenu(tr("&Ansicht"));
 
@@ -272,10 +281,16 @@ void MainWindow::onAbout()
 // ---------------------------------------------------------------------------
 // Slots – Projekt
 // ---------------------------------------------------------------------------
+void MainWindow::onShowFileSearch()
+{
+    m_editor->showFileSearchPanel();
+}
+
 void MainWindow::onProjectOpened(const QString &path)
 {
     setWindowTitle(QString("BareCode – %1").arg(path));
     m_fileTree->setRootPath(path);
+    m_editor->setSearchRoot(path);
     statusBar()->showMessage(tr("Projekt geöffnet: %1").arg(path), 4000);
 }
 
@@ -283,6 +298,7 @@ void MainWindow::onProjectClosed()
 {
     setWindowTitle("BareCode");
     m_fileTree->clearRoot();
+    m_editor->setSearchRoot(QString());
     statusBar()->showMessage(tr("Projekt geschlossen"), 3000);
 }
 
@@ -294,6 +310,10 @@ void MainWindow::saveWindowState()
     QSettings s(QSettings::IniFormat, QSettings::UserScope, "BareCode", "BareCode");
     s.setValue("window/geometry", saveGeometry());
     s.setValue("window/state",    saveState());
+
+    // Session speichern
+    m_settings->setLastOpenFiles(m_editor->openFilePaths());
+    m_settings->setLastActiveFile(m_editor->activeFilePath());
 }
 
 void MainWindow::restoreWindowState()
diff --git a/src/core/MainWindow.h b/src/core/MainWindow.h
index 7c00848..3ae9b17 100644
--- a/src/core/MainWindow.h
+++ b/src/core/MainWindow.h
@@ -41,6 +41,7 @@ private slots:
     void onUndo();
     void onRedo();
     void onShowSearch();
+    void onShowFileSearch();
     // Ansicht
     void onToggleDarkMode(bool checked);
     // Hilfe
@@ -80,6 +81,7 @@ private:
     QAction *m_actUndo        = nullptr;
     QAction *m_actRedo        = nullptr;
     QAction *m_actSearch      = nullptr;
+    QAction *m_actFileSearch  = nullptr;
     QAction *m_actDarkMode    = nullptr;
     QAction *m_actAbout       = nullptr;
 };
diff --git a/src/core/Settings.cpp b/src/core/Settings.cpp
index 8e4cc6e..4ebc21f 100644
--- a/src/core/Settings.cpp
+++ b/src/core/Settings.cpp
@@ -88,3 +88,26 @@ void Settings::setLastProjectPath(const QString &path)
 {
     m_settings.setValue("project/lastPath", path);
 }
+
+// ---------------------------------------------------------------------------
+// Session – geöffnete Dateien
+// ---------------------------------------------------------------------------
+QStringList Settings::lastOpenFiles() const
+{
+    return m_settings.value("session/openFiles", QStringList()).toStringList();
+}
+
+void Settings::setLastOpenFiles(const QStringList &files)
+{
+    m_settings.setValue("session/openFiles", files);
+}
+
+QString Settings::lastActiveFile() const
+{
+    return m_settings.value("session/activeFile", QString()).toString();
+}
+
+void Settings::setLastActiveFile(const QString &file)
+{
+    m_settings.setValue("session/activeFile", file);
+}
diff --git a/src/core/Settings.h b/src/core/Settings.h
index 502afbd..1122864 100644
--- a/src/core/Settings.h
+++ b/src/core/Settings.h
@@ -29,6 +29,13 @@ public:
     int     fileTreeWidth() const;
     void    setFileTreeWidth(int width);
 
+    // Zuletzt geöffnete Dateien (Session-Wiederherstellung)
+    QStringList lastOpenFiles() const;
+    void        setLastOpenFiles(const QStringList &files);
+
+    QString     lastActiveFile() const;
+    void        setLastActiveFile(const QString &file);
+
     // Recent
     QString lastProjectPath() const;
     void    setLastProjectPath(const QString &path);
diff --git a/src/editor/CMakeLists.txt b/src/editor/CMakeLists.txt
index 7893137..2d5e180 100644
--- a/src/editor/CMakeLists.txt
+++ b/src/editor/CMakeLists.txt
@@ -9,6 +9,8 @@ set(EDITOR_SOURCES
     EditorTab.h
     SearchPanel.cpp
     SearchPanel.h
+    FileSearchPanel.cpp
+    FileSearchPanel.h
 )
 
 add_library(BareCode_Editor STATIC ${EDITOR_SOURCES})
@@ -17,6 +19,7 @@ target_link_libraries(BareCode_Editor PUBLIC
     Qt6::Core
     Qt6::Gui
     Qt6::Widgets
+    Qt6::Concurrent
     BareCode_Highlighter
 )
 
diff --git a/src/editor/EditorPanel.cpp b/src/editor/EditorPanel.cpp
index ec06d60..e2c424c 100644
--- a/src/editor/EditorPanel.cpp
+++ b/src/editor/EditorPanel.cpp
@@ -2,9 +2,12 @@
 #include "EditorTab.h"
 #include "CodeEditor.h"
 #include "SearchPanel.h"
+#include "FileSearchPanel.h"
 
 #include <QFileInfo>
+#include <QFile>
 #include <QTextDocument>
+#include <QTextBlock>
 
 EditorPanel::EditorPanel(Settings *settings, QWidget *parent)
     : QWidget(parent)
@@ -28,15 +31,20 @@ void EditorPanel::setupUi()
     m_tabWidget->setDocumentMode(true);
 
     m_searchPanel = new SearchPanel(this);
+    m_fileSearch  = new FileSearchPanel(this);
 
     m_layout->addWidget(m_tabWidget, 1);
     m_layout->addWidget(m_searchPanel, 0);
+    m_layout->addWidget(m_fileSearch, 0);
 
     connect(m_tabWidget, &QTabWidget::tabCloseRequested,
             this, &EditorPanel::onTabCloseRequested);
 
     connect(m_tabWidget, &QTabWidget::currentChanged,
             this, &EditorPanel::onCurrentTabChanged);
+
+    connect(m_fileSearch, &FileSearchPanel::fileLineRequested,
+            this, &EditorPanel::goToLine);
 }
 
 // ---------------------------------------------------------------------------
@@ -127,9 +135,88 @@ void EditorPanel::saveAllFiles()
 
 void EditorPanel::showSearchPanel()
 {
+    m_fileSearch->hide();
     m_searchPanel->activate();
 }
 
+void EditorPanel::showFileSearchPanel()
+{
+    m_searchPanel->hide();
+    m_fileSearch->activate();
+}
+
+void EditorPanel::setSearchRoot(const QString &path)
+{
+    m_fileSearch->setSearchRoot(path);
+}
+
+void EditorPanel::goToLine(const QString &filePath, int line)
+{
+    // Datei öffnen falls noch nicht geöffnet
+    openFile(filePath);
+
+    EditorTab *tab = m_openTabs.value(filePath, nullptr);
+    if (!tab)
+    {
+        return;
+    }
+
+    m_tabWidget->setCurrentWidget(tab);
+
+    // Zur gewünschten Zeile springen
+    CodeEditor *editor = tab->editor();
+    QTextBlock block = editor->document()->findBlockByLineNumber(line - 1);
+    if (block.isValid())
+    {
+        QTextCursor cursor(block);
+        cursor.movePosition(QTextCursor::StartOfBlock);
+        editor->setTextCursor(cursor);
+        editor->centerCursor();
+        editor->setFocus();
+    }
+}
+
+QStringList EditorPanel::openFilePaths() const
+{
+    QStringList paths;
+    for (int i = 0; i < m_tabWidget->count(); ++i)
+    {
+        EditorTab *tab = qobject_cast<EditorTab *>(m_tabWidget->widget(i));
+        if (tab)
+        {
+            paths.append(tab->filePath());
+        }
+    }
+    return paths;
+}
+
+QString EditorPanel::activeFilePath() const
+{
+    EditorTab *tab = currentTab();
+    return tab ? tab->filePath() : QString();
+}
+
+void EditorPanel::restoreSession(const QStringList &files, const QString &activeFile)
+{
+    for (const QString &path : files)
+    {
+        if (QFile::exists(path))
+        {
+            openFile(path);
+        }
+    }
+
+    // Aktiven Tab wiederherstellen
+    if (!activeFile.isEmpty())
+    {
+        const int idx = findTabForFile(activeFile);
+        if (idx != -1)
+        {
+            m_tabWidget->setCurrentIndex(idx);
+        }
+    }
+}
+
 void EditorPanel::undo()
 {
     if (EditorTab *tab = currentTab())
diff --git a/src/editor/EditorPanel.h b/src/editor/EditorPanel.h
index 2fce31e..5c789ac 100644
--- a/src/editor/EditorPanel.h
+++ b/src/editor/EditorPanel.h
@@ -9,6 +9,7 @@
 class EditorTab;
 class Settings;
 class SearchPanel;
+class FileSearchPanel;
 
 // ---------------------------------------------------------------------------
 // EditorPanel – Rechtes Panel: Tab-Leiste + Editoren + Such/Ersetzen-Panel.
@@ -25,7 +26,15 @@ public slots:
     void saveCurrentFile();
     void saveCurrentFileAs();
     void saveAllFiles();
+    void setSearchRoot(const QString &path);
     void showSearchPanel();
+    void showFileSearchPanel();
+    void goToLine(const QString &filePath, int line);
+
+    // Session
+    QStringList openFilePaths() const;
+    QString     activeFilePath() const;
+    void        restoreSession(const QStringList &files, const QString &activeFile);
     void undo();
     void redo();
 
@@ -41,10 +50,11 @@ private:
     int        findTabForFile(const QString &filePath) const;
     EditorTab *currentTab() const;
 
-    Settings    *m_settings    = nullptr;
-    QVBoxLayout *m_layout      = nullptr;
-    QTabWidget  *m_tabWidget   = nullptr;
-    SearchPanel *m_searchPanel = nullptr;
+    Settings       *m_settings        = nullptr;
+    QVBoxLayout    *m_layout          = nullptr;
+    QTabWidget     *m_tabWidget       = nullptr;
+    SearchPanel    *m_searchPanel     = nullptr;
+    FileSearchPanel *m_fileSearch     = nullptr;
 
     QHash<QString, EditorTab *> m_openTabs;
 };
diff --git a/src/editor/FileSearchPanel.cpp b/src/editor/FileSearchPanel.cpp
new file mode 100644
index 0000000..f7d0030
--- /dev/null
+++ b/src/editor/FileSearchPanel.cpp
@@ -0,0 +1,330 @@
+#include "FileSearchPanel.h"
+
+#include <QDir>
+#include <QDirIterator>
+#include <QFile>
+#include <QTextStream>
+#include <QRegularExpression>
+#include <QKeyEvent>
+#include <QtConcurrent/QtConcurrent>
+#include <QFuture>
+
+// ---------------------------------------------------------------------------
+// Konstruktor
+// ---------------------------------------------------------------------------
+FileSearchPanel::FileSearchPanel(QWidget *parent)
+    : QWidget(parent)
+{
+    setupUi();
+    hide();
+
+    m_watcher = new QFutureWatcher<QList<Match>>(this);
+    connect(m_watcher, &QFutureWatcher<QList<Match>>::finished,
+            this, &FileSearchPanel::onSearchFinished);
+}
+
+// ---------------------------------------------------------------------------
+// UI
+// ---------------------------------------------------------------------------
+void FileSearchPanel::setupUi()
+{
+    QVBoxLayout *root = new QVBoxLayout(this);
+    root->setContentsMargins(6, 4, 6, 4);
+    root->setSpacing(4);
+
+    // ---- Zeile 1: Suchbegriff ----
+    QHBoxLayout *row1 = new QHBoxLayout();
+    row1->addWidget(new QLabel(tr("Suchen in Dateien:"), this));
+
+    m_searchEdit = new QLineEdit(this);
+    m_searchEdit->setPlaceholderText(tr("Suchbegriff…"));
+    m_searchEdit->setClearButtonEnabled(true);
+    row1->addWidget(m_searchEdit, 1);
+
+    m_btnSearch = new QPushButton(tr("Suchen"), this);
+    m_btnSearch->setDefault(true);
+    row1->addWidget(m_btnSearch);
+
+    m_btnClose = new QPushButton(tr("✕"), this);
+    m_btnClose->setFixedWidth(24);
+    m_btnClose->setFlat(true);
+    m_btnClose->setToolTip(tr("Schließen"));
+    row1->addWidget(m_btnClose);
+
+    root->addLayout(row1);
+
+    // ---- Zeile 2: Optionen + Filter ----
+    QHBoxLayout *row2 = new QHBoxLayout();
+    m_chkCase  = new QCheckBox(tr("Groß-/Kleinschreibung"), this);
+    m_chkWord  = new QCheckBox(tr("Ganzes Wort"), this);
+    m_chkRegex = new QCheckBox(tr("Regex"), this);
+
+    row2->addWidget(m_chkCase);
+    row2->addWidget(m_chkWord);
+    row2->addWidget(m_chkRegex);
+    row2->addSpacing(12);
+
+    row2->addWidget(new QLabel(tr("Dateitypen:"), this));
+    m_filterEdit = new QLineEdit(this);
+    m_filterEdit->setText("*.html *.php *.css *.js *.c *.cpp *.h");
+    m_filterEdit->setFixedWidth(220);
+    m_filterEdit->setToolTip(tr("Leerzeichen-getrennte Muster, z.B.: *.php *.html"));
+    row2->addWidget(m_filterEdit);
+    row2->addStretch();
+
+    root->addLayout(row2);
+
+    // ---- Fortschritt + Status ----
+    m_progress = new QProgressBar(this);
+    m_progress->setRange(0, 0);   // Unbestimmter Modus
+    m_progress->setFixedHeight(4);
+    m_progress->hide();
+    root->addWidget(m_progress);
+
+    m_statusLabel = new QLabel(this);
+    m_statusLabel->setStyleSheet("color: palette(mid);");
+    root->addWidget(m_statusLabel);
+
+    // ---- Ergebnisliste ----
+    m_results = new QTreeWidget(this);
+    m_results->setHeaderHidden(true);
+    m_results->setRootIsDecorated(true);
+    m_results->setIndentation(16);
+    m_results->setUniformRowHeights(true);
+    m_results->setAlternatingRowColors(true);
+    root->addWidget(m_results, 1);
+
+    // ---- Verbindungen ----
+    connect(m_btnSearch, &QPushButton::clicked, this, &FileSearchPanel::onSearch);
+    connect(m_searchEdit, &QLineEdit::returnPressed, this, &FileSearchPanel::onSearch);
+    connect(m_btnClose, &QPushButton::clicked, this, [this]()
+    {
+        hide();
+    });
+    connect(m_results, &QTreeWidget::itemActivated,
+            this, &FileSearchPanel::onResultActivated);
+}
+
+// ---------------------------------------------------------------------------
+// Öffentliche Schnittstelle
+// ---------------------------------------------------------------------------
+void FileSearchPanel::setSearchRoot(const QString &path)
+{
+    m_searchRoot = path;
+}
+
+void FileSearchPanel::activate()
+{
+    show();
+    m_searchEdit->setFocus();
+    m_searchEdit->selectAll();
+}
+
+// ---------------------------------------------------------------------------
+// Suche starten
+// ---------------------------------------------------------------------------
+void FileSearchPanel::onSearch()
+{
+    const QString needle = m_searchEdit->text().trimmed();
+    if (needle.isEmpty())
+    {
+        return;
+    }
+
+    if (m_searchRoot.isEmpty())
+    {
+        m_statusLabel->setText(tr("Kein Projektverzeichnis geöffnet."));
+        return;
+    }
+
+    // Laufende Suche abbrechen
+    if (m_watcher->isRunning())
+    {
+        m_watcher->cancel();
+        m_watcher->waitForFinished();
+    }
+
+    m_results->clear();
+    m_statusLabel->setText(tr("Suche läuft…"));
+    m_progress->show();
+    m_btnSearch->setEnabled(false);
+
+    const QString      root       = m_searchRoot;
+    const bool         cs         = m_chkCase->isChecked();
+    const bool         word       = m_chkWord->isChecked();
+    const bool         regex      = m_chkRegex->isChecked();
+    const QStringList  extensions = m_filterEdit->text().simplified().split(' ',
+                                        Qt::SkipEmptyParts);
+
+    QFuture<QList<Match>> future = QtConcurrent::run(
+        [this, root, needle, cs, word, regex, extensions]()
+        {
+            return searchInFiles(root, needle, cs, word, regex, extensions);
+        }
+    );
+
+    m_watcher->setFuture(future);
+}
+
+// ---------------------------------------------------------------------------
+// Suchergebnisse anzeigen
+// ---------------------------------------------------------------------------
+void FileSearchPanel::onSearchFinished()
+{
+    m_progress->hide();
+    m_btnSearch->setEnabled(true);
+
+    if (m_watcher->isCanceled())
+    {
+        return;
+    }
+
+    const QList<Match> matches = m_watcher->result();
+
+    // Ergebnisse gruppiert nach Datei aufbauen
+    QString      currentFile;
+    QTreeWidgetItem *fileItem = nullptr;
+    int          fileCount   = 0;
+    int          matchCount  = 0;
+
+    for (const Match &m : matches)
+    {
+        if (m.filePath != currentFile)
+        {
+            currentFile = m.filePath;
+            ++fileCount;
+
+            fileItem = new QTreeWidgetItem(m_results);
+            fileItem->setText(0, QFileInfo(m.filePath).fileName());
+            fileItem->setToolTip(0, m.filePath);
+            fileItem->setData(0, Qt::UserRole, m.filePath);
+            fileItem->setData(0, Qt::UserRole + 1, -1);
+
+            QFont boldFont = fileItem->font(0);
+            boldFont.setBold(true);
+            fileItem->setFont(0, boldFont);
+            fileItem->setExpanded(true);
+        }
+
+        QTreeWidgetItem *lineItem = new QTreeWidgetItem(fileItem);
+        lineItem->setText(0, QString("  Zeile %1: %2")
+                              .arg(m.line)
+                              .arg(m.content.trimmed().left(120)));
+        lineItem->setToolTip(0, m.content.trimmed());
+        lineItem->setData(0, Qt::UserRole,     m.filePath);
+        lineItem->setData(0, Qt::UserRole + 1, m.line);
+
+        ++matchCount;
+    }
+
+    // Datei-Titelzeilen um Trefferanzahl ergänzen
+    for (int i = 0; i < m_results->topLevelItemCount(); ++i)
+    {
+        QTreeWidgetItem *item = m_results->topLevelItem(i);
+        const int count       = item->childCount();
+        item->setText(0, QString("%1  (%2 Treffer)")
+                           .arg(QFileInfo(item->data(0, Qt::UserRole).toString()).fileName())
+                           .arg(count));
+    }
+
+    if (matchCount == 0)
+    {
+        m_statusLabel->setText(tr("Keine Treffer gefunden."));
+    }
+    else
+    {
+        m_statusLabel->setText(tr("%1 Treffer in %2 Datei(en).")
+                                   .arg(matchCount)
+                                   .arg(fileCount));
+    }
+}
+
+// ---------------------------------------------------------------------------
+// Klick auf Treffer → Datei + Zeile öffnen
+// ---------------------------------------------------------------------------
+void FileSearchPanel::onResultActivated(QTreeWidgetItem *item, int /*column*/)
+{
+    const QString path = item->data(0, Qt::UserRole).toString();
+    const int     line = item->data(0, Qt::UserRole + 1).toInt();
+
+    if (path.isEmpty() || line < 0)
+    {
+        // Datei-Titelzeile: nur auf-/zuklappen
+        item->setExpanded(!item->isExpanded());
+        return;
+    }
+
+    emit fileLineRequested(path, line);
+}
+
+// ---------------------------------------------------------------------------
+// Eigentliche Suchroutine (läuft in Thread-Pool)
+// ---------------------------------------------------------------------------
+QList<FileSearchPanel::Match> FileSearchPanel::searchInFiles(
+    const QString    &root,
+    const QString    &needle,
+    bool              caseSensitive,
+    bool              wholeWord,
+    bool              useRegex,
+    const QStringList &extensions) const
+{
+    QList<Match> results;
+
+    // Regulären Ausdruck vorbereiten
+    QString pattern = useRegex ? needle : QRegularExpression::escape(needle);
+    if (wholeWord)
+    {
+        pattern = "\\b" + pattern + "\\b";
+    }
+
+    QRegularExpression re(pattern,
+        caseSensitive
+            ? QRegularExpression::NoPatternOption
+            : QRegularExpression::CaseInsensitiveOption);
+
+    if (!re.isValid())
+    {
+        return results;
+    }
+
+    // Verzeichnis rekursiv durchsuchen
+    QDirIterator it(root,
+                    extensions.isEmpty()
+                        ? QStringList("*")
+                        : extensions,
+                    QDir::Files,
+                    QDirIterator::Subdirectories);
+
+    while (it.hasNext())
+    {
+        if (m_watcher->isCanceled())
+        {
+            break;
+        }
+
+        const QString filePath = it.next();
+
+        QFile file(filePath);
+        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
+        {
+            continue;
+        }
+
+        QTextStream stream(&file);
+        stream.setEncoding(QStringConverter::Utf8);
+
+        int lineNumber = 0;
+        while (!stream.atEnd())
+        {
+            ++lineNumber;
+            const QString line = stream.readLine();
+
+            if (re.match(line).hasMatch())
+            {
+                results.append({ filePath, lineNumber, line });
+            }
+        }
+    }
+
+    return results;
+}
diff --git a/src/editor/FileSearchPanel.h b/src/editor/FileSearchPanel.h
new file mode 100644
index 0000000..97b9766
--- /dev/null
+++ b/src/editor/FileSearchPanel.h
@@ -0,0 +1,77 @@
+#pragma once
+
+#include <QWidget>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QCheckBox>
+#include <QTreeWidget>
+#include <QTreeWidgetItem>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QProgressBar>
+#include <QFutureWatcher>
+#include <QString>
+#include <QStringList>
+
+// ---------------------------------------------------------------------------
+// FileSearchPanel – Suche in allen Dateien eines Verzeichnisses.
+//
+// Ergebnisse werden als aufklappbare Liste angezeigt:
+//   Dateiname (N Treffer)
+//     └ Zeile 12: <Zeileninhalt>
+//     └ Zeile 34: <Zeileninhalt>
+//
+// Klick auf einen Treffer öffnet die Datei im Editor und springt zur Zeile.
+// ---------------------------------------------------------------------------
+class FileSearchPanel : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit FileSearchPanel(QWidget *parent = nullptr);
+
+    void setSearchRoot(const QString &path);
+
+public slots:
+    void activate();
+
+signals:
+    void fileLineRequested(const QString &filePath, int line);
+
+private slots:
+    void onSearch();
+    void onResultActivated(QTreeWidgetItem *item, int column);
+    void onSearchFinished();
+
+private:
+    struct Match
+    {
+        QString filePath;
+        int     line;
+        QString content;
+    };
+
+    void setupUi();
+    QList<Match> searchInFiles(const QString &root,
+                               const QString &needle,
+                               bool caseSensitive,
+                               bool wholeWord,
+                               bool useRegex,
+                               const QStringList &extensions) const;
+
+    QString      m_searchRoot;
+
+    QLineEdit   *m_searchEdit   = nullptr;
+    QCheckBox   *m_chkCase      = nullptr;
+    QCheckBox   *m_chkWord      = nullptr;
+    QCheckBox   *m_chkRegex     = nullptr;
+    QLineEdit   *m_filterEdit   = nullptr;   // Dateiendungen-Filter
+    QPushButton *m_btnSearch    = nullptr;
+    QPushButton *m_btnClose     = nullptr;
+    QLabel      *m_statusLabel  = nullptr;
+    QTreeWidget *m_results      = nullptr;
+    QProgressBar *m_progress    = nullptr;
+
+    QFutureWatcher<QList<Match>> *m_watcher = nullptr;
+};