Fix mouse interaction artifacts and scroll speed

- Change scroll wheel to move 1 item at a time (was 3) for precise navigation
- Remove early returns from mouse handlers to ensure full Update flow runs,
  fixing visual artifacts where old/new selections were both visible
- Remove Width() wrapper from listviewport.View() to prevent zone marker
  artifacts (per bubblezone docs, Width/MaxWidth can corrupt zone markers)

Author: hjanuschka

internal/tui/components/listviewport/listviewport.go

@@ -4,7 +4,6 @@ import (
 	"time"
 
 	"github.com/charmbracelet/bubbles/viewport"
-	"github.com/charmbracelet/lipgloss"
 
 	"github.com/dlvhdr/gh-dash/v4/internal/tui/constants"
 	"github.com/dlvhdr/gh-dash/v4/internal/tui/context"
@@ -162,13 +161,10 @@ func (m *Model) SetDimensions(dimensions constants.Dimensions) {
 }
 
 func (m *Model) View() string {
-	viewport := m.viewport.View()
-	// Note: Avoid using MaxWidth() on content containing zone markers as it can
-	// truncate them and cause visual artifacts. The viewport already constrains
-	// content to its width.
-	return lipgloss.NewStyle().
-		Width(m.viewport.Width).
-		Render(viewport)
+	// Return viewport content directly without additional Width/MaxWidth styling.
+	// The viewport already constrains content to its width, and applying
+	// Width/MaxWidth to content containing zone markers can cause visual artifacts.
+	return m.viewport.View()
 }
 
 func (m *Model) UpdateProgramContext(ctx *context.ProgramContext) {

internal/tui/ui.go

@@ -667,20 +667,15 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 				if section != nil {
 					if msg.Button == tea.MouseButtonWheelUp {
 						section.PrevRow()
-						section.PrevRow()
-						section.PrevRow()
 					} else {
 						prevRow := section.CurrRow()
-						section.NextRow()
-						section.NextRow()
 						nextRow := section.NextRow()
 						// Fetch more if we're near the bottom
 						if prevRow != nextRow && nextRow >= section.NumRows()-3 && m.ctx.View != config.RepoView {
 							cmds = append(cmds, section.FetchNextPageSectionRows()...)
 						}
 					}
-					cmds = append(cmds, m.onViewedRowChanged())
-					return m, tea.Batch(cmds...)
+					cmd = m.onViewedRowChanged()
 				}
 			}
 		}
@@ -706,9 +701,8 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 					currRow := section.CurrRow()
 					if clickedRow != currRow {
 						section.SetCurrRow(clickedRow)
-						cmds = append(cmds, m.onViewedRowChanged())
+						cmd = m.onViewedRowChanged()
 					}
-					return m, tea.Batch(cmds...)
 				}
 			}
 		}