fix(quick-13): resolve lint issues in main source files

- Fix errcheck for db.Close() in testhelper.go
- Fix errcheck, nlreturn, wsl, gofumpt issues in genevents/main.go
- Fix gofumpt and wsl issues in library.go

backend/queue/navigation_test.go

@@ -14,7 +14,7 @@ func newTestQueueDirect(tracks int, currentIndex int) *Queue {
 	}
 
 	q.tracks = make([]Track, tracks)
-	for i := 0; i < tracks; i++ {
+	for i := range tracks {
 		q.tracks[i] = Track{FilePath: "/test/track.mp3", Position: int64(i)}
 	}
 
@@ -135,11 +135,15 @@ func TestGenerateShuffleOrder_Properties(t *testing.T) {
 
 			// Property 2: current track is at shuffleOrder[0].
 			if q.shuffleOrder[0] != tc.currentIdx {
-				t.Errorf("shuffleOrder[0]: got %d, want %d (currentIndex)", q.shuffleOrder[0], tc.currentIdx)
+				t.Errorf(
+					"shuffleOrder[0]: got %d, want %d (currentIndex)",
+					q.shuffleOrder[0], tc.currentIdx,
+				)
 			}
 
 			// Property 3: all indices present (no duplicates, no missing).
 			seen := make(map[int]bool, tc.trackCount)
+
 			for _, idx := range q.shuffleOrder {
 				if idx < 0 || idx >= tc.trackCount {
 					t.Errorf("shuffleOrder contains out-of-range index: %d", idx)
@@ -153,7 +157,10 @@ func TestGenerateShuffleOrder_Properties(t *testing.T) {
 			}
 
 			if len(seen) != tc.trackCount {
-				t.Errorf("unique indices in shuffleOrder: got %d, want %d", len(seen), tc.trackCount)
+				t.Errorf(
+					"unique indices in shuffleOrder: got %d, want %d",
+					len(seen), tc.trackCount,
+				)
 			}
 		})
 	}
@@ -177,6 +184,7 @@ func TestNextIndex_ShuffleMode(t *testing.T) {
 	// Advance to index 4 and get next.
 	q.currentIndex = 4
 	got = q.nextIndex()
+
 	if got != 0 {
 		t.Errorf("nextIndex (shuffle, pos 2): got %d, want 0", got)
 	}
@@ -184,6 +192,7 @@ func TestNextIndex_ShuffleMode(t *testing.T) {
 	// At the end of shuffle order with RepeatOff.
 	q.currentIndex = 1 // last in shuffleOrder
 	got = q.nextIndex()
+
 	if got != -1 {
 		t.Errorf("nextIndex (shuffle, end, repeatOff): got %d, want -1", got)
 	}
@@ -191,7 +200,11 @@ func TestNextIndex_ShuffleMode(t *testing.T) {
 	// At the end of shuffle order with RepeatAll.
 	q.repeatMode = RepeatAll
 	got = q.nextIndex()
+
 	if got != 2 {
-		t.Errorf("nextIndex (shuffle, end, repeatAll): got %d, want 2 (wraps to shuffleOrder[0])", got)
+		t.Errorf(
+			"nextIndex (shuffle, end, repeatAll): got %d, want 2 "+
+				"(wraps to shuffleOrder[0])", got,
+		)
 	}
 }

backend/queue/persistence_test.go

@@ -35,7 +35,10 @@ func TestSaveState_RestoreState_Roundtrip(t *testing.T) {
 	// Each track's FilePath, Title, Artist.
 	for i := range s1.Tracks {
 		if s2.Tracks[i].FilePath != s1.Tracks[i].FilePath {
-			t.Errorf("track[%d] FilePath: got %q, want %q", i, s2.Tracks[i].FilePath, s1.Tracks[i].FilePath)
+			t.Errorf(
+				"track[%d] FilePath: got %q, want %q",
+				i, s2.Tracks[i].FilePath, s1.Tracks[i].FilePath,
+			)
 		}
 
 		if s2.Tracks[i].Title != s1.Tracks[i].Title {
@@ -43,7 +46,10 @@ func TestSaveState_RestoreState_Roundtrip(t *testing.T) {
 		}
 
 		if s2.Tracks[i].Artist != s1.Tracks[i].Artist {
-			t.Errorf("track[%d] Artist: got %q, want %q", i, s2.Tracks[i].Artist, s1.Tracks[i].Artist)
+			t.Errorf(
+				"track[%d] Artist: got %q, want %q",
+				i, s2.Tracks[i].Artist, s1.Tracks[i].Artist,
+			)
 		}
 	}
 
@@ -71,7 +77,10 @@ func TestSaveState_RestoreState_Roundtrip(t *testing.T) {
 	} else {
 		for i := range q.shuffleOrder {
 			if q2.shuffleOrder[i] != q.shuffleOrder[i] {
-				t.Errorf("shuffleOrder[%d]: got %d, want %d", i, q2.shuffleOrder[i], q.shuffleOrder[i])
+				t.Errorf(
+					"shuffleOrder[%d]: got %d, want %d",
+					i, q2.shuffleOrder[i], q.shuffleOrder[i],
+				)
 			}
 		}
 	}

backend/queue/queue_test.go

@@ -16,6 +16,7 @@ type mockTrackLoader struct {
 
 func (m *mockTrackLoader) LoadFile(filePath string) error {
 	m.loadedFile = filePath
+
 	return nil
 }
 
@@ -53,7 +54,7 @@ func seedAudioFiles(t *testing.T, db *database.DB, count int) []string {
 
 	paths := make([]string, count)
 
-	for i := 0; i < count; i++ {
+	for i := range count {
 		recID := i + 1
 		afID := i + 1
 		fp := fmt.Sprintf("/test/track%d.mp3", i+1)
@@ -68,7 +69,9 @@ func seedAudioFiles(t *testing.T, db *database.DB, count int) []string {
 		}
 
 		_, err = db.ExecContext(
-			"INSERT OR IGNORE INTO audio_files (id, file_path, length_milliseconds, file_type_id, recording_id) VALUES (?, ?, 180000, 0, ?)",
+			"INSERT OR IGNORE INTO audio_files (id, file_path, "+
+				"length_milliseconds, file_type_id, recording_id) "+
+				"VALUES (?, ?, 180000, 0, ?)",
 			afID, fp, recID,
 		)
 		if err != nil {
@@ -292,7 +295,10 @@ func TestRemoveTrack_RemoveCurrentTrack(t *testing.T) {
 
 	// After removing currentIndex=2, index should be clamped to valid range.
 	if state.CurrentIndex < 0 || state.CurrentIndex >= len(state.Tracks) {
-		t.Errorf("currentIndex out of range: got %d, track count %d", state.CurrentIndex, len(state.Tracks))
+		t.Errorf(
+			"currentIndex out of range: got %d, track count %d",
+			state.CurrentIndex, len(state.Tracks),
+		)
 	}
 }