fix(renderer): restore tab stops if hard tabs are enabled

When hard tabs are enabled, we optimize rendering by using actual tab
characters instead of spaces. This requires us to set tab stops every 8
columns at the beginning of the rendering process.

Fixes: #1614

Author: aymanbagabas

cursed_renderer.go

@@ -275,6 +275,11 @@ func (s *cursedRenderer) flush(closing bool) error {
 		}
 	}
 
+	// Restore tab stops if we have tab optimizations enabled.
+	if s.starting && s.hardTabs {
+		_, _ = s.scr.WriteString(ansi.SetTabEvery8Columns)
+	}
+
 	if !s.starting && !closing && s.lastView != nil && viewEquals(s.lastView, &view) && frameArea == s.cellbuf.Bounds() {
 		// No changes, nothing to do.
 		return nil