diff --git a/core/editor.py b/core/editor.py
index 1054ccd..898aef4 100644
--- a/core/editor.py
+++ b/core/editor.py
@@ -109,11 +109,17 @@ def __init__(self, editor: "CodeEditor", parent=None):
 
         editor.textChanged.connect(self._invalidate_cache)
         editor.cursorPositionChanged.connect(self.update)
-        editor.blockCountChanged.connect(lambda _count: self._invalidate_cache())
+        editor.blockCountChanged.connect(self._block_count_changed)
         editor.updateRequest.connect(self._editor_update_requested)
-        editor.verticalScrollBar().valueChanged.connect(lambda _value: self.update())
+        editor.verticalScrollBar().valueChanged.connect(self._scroll_value_changed)
         editor.document().contentsChanged.connect(self._invalidate_cache)
 
+    def _block_count_changed(self, _count):
+        self._invalidate_cache()
+
+    def _scroll_value_changed(self, _value):
+        self.update()
+
     def _editor_update_requested(self, _rect, _dy):
         """Zeichnet die Vorschau nach Scroll- und Viewport-Updates neu."""
         self.update()
diff --git a/features/project_view.py b/features/project_view.py
index a2590d3..311f843 100644
--- a/features/project_view.py
+++ b/features/project_view.py
@@ -222,7 +222,7 @@ def _setup_ui(self):
             "Öffnet den Dialog zum Bereitstellen und Committen von Git-Änderungen."
         )
         self.btn_commit.setEnabled(False)
-        self.btn_commit.clicked.connect(lambda: self.open_commit_dialog())
+        self.btn_commit.clicked.connect(self._on_commit_clicked)
         header.addWidget(self.btn_commit)
 
         layout.addLayout(header)
@@ -338,6 +338,9 @@ def _setup_ui(self):
 
         layout.addWidget(self.tree)
 
+    def _on_commit_clicked(self, _checked=False):
+        self.open_commit_dialog()
+
     def set_workspace(self, workspace: Optional[WorkspaceManager]):
         """Verbindet die ProjectView mit dem WorkspaceManager."""
         if self._workspace is not None:
diff --git a/tests/test_minimap.py b/tests/test_minimap.py
index 7b33753..b3fa374 100644
--- a/tests/test_minimap.py
+++ b/tests/test_minimap.py
@@ -2,6 +2,9 @@
 # -*- coding: utf-8 -*-
 """Tests für CodeBox-Minimap und ihre Editor-Einstellung."""
 
+import gc
+import weakref
+
 import pytest
 from PySide6.QtWidgets import QApplication
 
@@ -47,6 +50,23 @@ def test_minimap_navigation_and_visibility(qapp):
     editor.close()
 
 
+def test_minimap_signal_connections_release_closed_editor(qapp):
+    references = []
+    for _ in range(3):
+        editor = CodeEditor()
+        editor.setPlainText("first\nsecond")
+        assert editor.minimap._document_lines() == ["first", "second"]
+        editor.appendPlainText("third")
+        assert editor.minimap._cached_lines is None
+        assert editor.minimap._document_lines() == ["first", "second", "third"]
+        references.append(weakref.ref(editor))
+        editor.close()
+        del editor
+    gc.collect()
+    qapp.processEvents()
+    assert all(reference() is None for reference in references)
+
+
 def test_main_window_applies_minimap_setting(qapp, tmp_path, monkeypatch):
     settings_file = tmp_path / "settings.json"
     monkeypatch.setattr("config._SETTINGS_FILE", settings_file)
diff --git a/tests/test_project_view.py b/tests/test_project_view.py
index a3a94b4..9f3f084 100644
--- a/tests/test_project_view.py
+++ b/tests/test_project_view.py
@@ -1,4 +1,6 @@
 """Regressionstests für ProjectView und Pfadsync im Hauptfenster."""
+import gc
+import weakref
 from unittest.mock import patch
 
 from PySide6.QtWidgets import QApplication
@@ -11,6 +13,23 @@ def _ensure_app():
     return QApplication.instance() or QApplication([])
 
 
+def test_commit_button_dispatch_and_closed_view_collection():
+    app = _ensure_app()
+    references = []
+    for _ in range(3):
+        view = ProjectView()
+        with patch.object(view, "open_commit_dialog") as open_dialog:
+            view.btn_commit.setEnabled(True)
+            view.btn_commit.click()
+            open_dialog.assert_called_once_with()
+        references.append(weakref.ref(view))
+        view.close()
+        del view
+    gc.collect()
+    app.processEvents()
+    assert all(reference() is None for reference in references)
+
+
 def test_new_file_in_shows_error_on_write_failure(tmp_path):
     """Regression (B-008): _new_file_in() muss OSError abfangen und eine
     Fehlermeldung zeigen, statt die Ausnahme unkontrolliert zu propagieren."""