diff --git a/.ruff.toml b/.ruff.toml
index 09f6a1b9c..cb1d651e4 100644
--- a/.ruff.toml
+++ b/.ruff.toml
@@ -28,7 +28,6 @@ lint.ignore = [
   "F402", # import-shadowed-by-loop-var
   "F403", # undefined-local-with-import-star
   "F405", # undefined-local-with-import-star-usage
-  "F841", # unused-variable
 
   # Naming rules (invalid-name in pylint)
   "N801", # Class name should use CapWords convention
diff --git a/build/ninja_gen/src/python.rs b/build/ninja_gen/src/python.rs
index e1d8d9b46..93385e2cb 100644
--- a/build/ninja_gen/src/python.rs
+++ b/build/ninja_gen/src/python.rs
@@ -248,7 +248,14 @@ impl BuildAction for RuffCheck {
         build.add_inputs("", &self.deps);
         build.add_inputs("ruff", inputs![":pyenv:ruff"]);
         build.add_variable("folders", self.folders.join(" "));
-        build.add_variable("mode", if self.check_only { "" } else { "--fix" });
+        build.add_variable(
+            "mode",
+            if self.check_only {
+                ""
+            } else {
+                "--fix --unsafe-fixes"
+            },
+        );
 
         let hash = simple_hash(&self.deps);
         let kind = if self.check_only { "check" } else { "fix" };
diff --git a/qt/aqt/__init__.py b/qt/aqt/__init__.py
index 172ec2a2c..e0864b301 100644
--- a/qt/aqt/__init__.py
+++ b/qt/aqt/__init__.py
@@ -29,7 +29,7 @@ if sys.version_info[0] < 3 or sys.version_info[1] < 9:
 # ensure unicode filenames are supported
 try:
     "テスト".encode(sys.getfilesystemencoding())
-except UnicodeEncodeError as exc:
+except UnicodeEncodeError:
     print("Anki requires a UTF-8 locale.")
     print("Please Google 'how to change locale on [your Linux distro]'")
     sys.exit(1)
@@ -558,7 +558,7 @@ def run() -> None:
     print(f"Starting Anki {_version}...")
     try:
         _run()
-    except Exception as e:
+    except Exception:
         traceback.print_exc()
         QMessageBox.critical(
             None,
diff --git a/qt/aqt/browser/sidebar/tree.py b/qt/aqt/browser/sidebar/tree.py
index e28f166e9..22d7fa4a6 100644
--- a/qt/aqt/browser/sidebar/tree.py
+++ b/qt/aqt/browser/sidebar/tree.py
@@ -106,7 +106,7 @@ class SidebarTreeView(QTreeView):
     def _setup_style(self) -> None:
         # match window background color and tweak style
         bgcolor = QPalette().window().color().name()
-        border = theme_manager.var(colors.BORDER)
+        theme_manager.var(colors.BORDER)
         styles = [
             "padding: 3px",
             "padding-right: 0px",
@@ -711,7 +711,6 @@ class SidebarTreeView(QTreeView):
 
     def _flags_tree(self, root: SidebarItem) -> None:
         icon_off = "icons:flag-variant-off-outline.svg"
-        icon = "icons:flag-variant.svg"
         icon_outline = "icons:flag-variant-outline.svg"
 
         root = self._section_root(
diff --git a/qt/aqt/browser/table/model.py b/qt/aqt/browser/table/model.py
index e8d3bb7b6..732e8c99c 100644
--- a/qt/aqt/browser/table/model.py
+++ b/qt/aqt/browser/table/model.py
@@ -105,11 +105,11 @@ class DataModel(QAbstractTableModel):
             row = CellRow(*self.col.browser_row_for_id(item))
         except BackendError as e:
             return CellRow.disabled(self.len_columns(), str(e))
-        except Exception as e:
+        except Exception:
             return CellRow.disabled(
                 self.len_columns(), tr.errors_please_check_database()
             )
-        except BaseException as e:
+        except BaseException:
             # fatal error like a panic in the backend - dump it to the
             # console so it gets picked up by the error handler
             import traceback
diff --git a/qt/aqt/editor.py b/qt/aqt/editor.py
index bbad44bd6..f2f267097 100644
--- a/qt/aqt/editor.py
+++ b/qt/aqt/editor.py
@@ -796,7 +796,7 @@ require("anki/ui").loaded.then(() => require("anki/NoteEditor").instances[0].too
         def accept(file: str) -> None:
             self.resolve_media(file)
 
-        file = getFile(
+        getFile(
             parent=self.widget,
             title=tr.editing_add_media(),
             cb=cast(Callable[[Any], None], accept),
@@ -999,7 +999,7 @@ require("anki/ui").loaded.then(() => require("anki/NoteEditor").instances[0].too
         if html.find(">") < 0:
             return html
 
-        with warnings.catch_warnings() as w:
+        with warnings.catch_warnings():
             warnings.simplefilter("ignore", UserWarning)
             doc = BeautifulSoup(html, "html.parser")
 
@@ -1101,7 +1101,7 @@ require("anki/ui").loaded.then(() => require("anki/NoteEditor").instances[0].too
         )
         filter = f"{tr.editing_media()} ({extension_filter})"
 
-        file = getFile(
+        getFile(
             parent=self.widget,
             title=tr.editing_add_media(),
             cb=cast(Callable[[Any], None], self.setup_mask_editor),
diff --git a/qt/aqt/importing.py b/qt/aqt/importing.py
index 282d15339..8701f9843 100644
--- a/qt/aqt/importing.py
+++ b/qt/aqt/importing.py
@@ -357,7 +357,7 @@ def importFile(mw: AnkiQt, file: str) -> None:
         try:
             importer.open()
             mw.progress.finish()
-            diag = ImportDialog(mw, importer)
+            ImportDialog(mw, importer)
         except UnicodeDecodeError:
             mw.progress.finish()
             showUnicodeWarning()
diff --git a/qt/aqt/main.py b/qt/aqt/main.py
index c141dc20c..e2e6f8534 100644
--- a/qt/aqt/main.py
+++ b/qt/aqt/main.py
@@ -675,7 +675,7 @@ class AnkiQt(QMainWindow):
             gui_hooks.collection_did_load(self.col)
             self.apply_collection_options()
             self.moveToState("deckBrowser")
-        except Exception as e:
+        except Exception:
             # dump error to stderr so it gets picked up by errors.py
             traceback.print_exc()
 
diff --git a/qt/aqt/mpv.py b/qt/aqt/mpv.py
index ac6a05b05..2586d024a 100644
--- a/qt/aqt/mpv.py
+++ b/qt/aqt/mpv.py
@@ -396,7 +396,7 @@ class MPVBase:
             return self._get_response(timeout)
         except MPVCommandError as e:
             raise MPVCommandError(f"{message['command']!r}: {e}")
-        except Exception as e:
+        except Exception:
             if _retry:
                 print("mpv timed out, restarting")
                 self._stop_process()
diff --git a/qt/aqt/overview.py b/qt/aqt/overview.py
index bbdbde3a6..b1fc9a119 100644
--- a/qt/aqt/overview.py
+++ b/qt/aqt/overview.py
@@ -180,7 +180,6 @@ class Overview:
     ############################################################
 
     def _renderPage(self) -> None:
-        but = self.mw.button
         deck = self.mw.col.decks.current()
         self.sid = deck.get("sharedFrom")
         if self.sid:
diff --git a/qt/aqt/profiles.py b/qt/aqt/profiles.py
index 9ceeb713c..919be170c 100644
--- a/qt/aqt/profiles.py
+++ b/qt/aqt/profiles.py
@@ -153,7 +153,7 @@ class ProfileManager:
         else:
             try:
                 self.load(profile)
-            except Exception as exc:
+            except Exception:
                 self.invalid_profile_provided_on_commandline = True
 
     # Profile load/save
diff --git a/qt/aqt/theme.py b/qt/aqt/theme.py
index 6e91b2649..675eb9345 100644
--- a/qt/aqt/theme.py
+++ b/qt/aqt/theme.py
@@ -351,7 +351,7 @@ def get_windows_dark_mode() -> bool:
             r"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize",
         )
         return not QueryValueEx(key, "AppsUseLightTheme")[0]
-    except Exception as err:
+    except Exception:
         # key reportedly missing or set to wrong type on some systems
         return False
 
@@ -415,12 +415,12 @@ def get_linux_dark_mode() -> bool:
                 capture_output=True,
                 encoding="utf8",
             )
-        except FileNotFoundError as e:
+        except FileNotFoundError:
             # detection strategy failed, missing program
             # print(e)
             continue
 
-        except subprocess.CalledProcessError as e:
+        except subprocess.CalledProcessError:
             # detection strategy failed, command returned error
             # print(e)
             continue
diff --git a/qt/aqt/utils.py b/qt/aqt/utils.py
index 9f48ea788..64d057082 100644
--- a/qt/aqt/utils.py
+++ b/qt/aqt/utils.py
@@ -1268,7 +1268,7 @@ def opengl_vendor() -> str | None:
 
         try:
             vf = ctx.versionFunctions(vp)  # type: ignore
-        except ImportError as e:
+        except ImportError:
             return None
 
         if vf is None:
diff --git a/qt/aqt/winpaths.py b/qt/aqt/winpaths.py
index e53a47c06..8b2698739 100644
--- a/qt/aqt/winpaths.py
+++ b/qt/aqt/winpaths.py
@@ -100,7 +100,7 @@ _SHGetFolderPath.restype = _err_unless_zero
 
 def _get_path_buf(csidl):
     path_buf = ctypes.create_unicode_buffer(wintypes.MAX_PATH)
-    result = _SHGetFolderPath(0, csidl, 0, 0, path_buf)
+    _SHGetFolderPath(0, csidl, 0, 0, path_buf)
     return path_buf.value