标题粗体显示：h1-h6 标题在正文中标粗区分

src/reader.rs

@@ -239,13 +239,38 @@ egui::ComboBox::from_id_salt("bg_type_selector")
                     ui.with_layout(
                         egui::Layout::top_down(align).with_main_justify(false),
                         |ui| {
-                            ui.add(
-                                egui::Label::new(
-                                    egui::RichText::new(&indented)
+                            let mut is_heading = false;
+                            let mut remaining = indented.as_str();
+                            while !remaining.is_empty() {
+                                if let Some(pos) = remaining.find(['\x01', '\x02']) {
+                                    if pos > 0 {
+                                        let text = &remaining[..pos];
+                                        let mut rt = egui::RichText::new(text)
+                                            .size(style.font_size)
+                                            .color(colors.text);
+                                        if is_heading {
+                                            rt = rt.strong();
+                                        }
+                                        ui.add(egui::Label::new(rt).wrap());
+                                    }
+                                    let marker = remaining.chars().nth(pos).unwrap();
+                                    if marker == '\x01' {
+                                        is_heading = true;
+                                    } else {
+                                        is_heading = false;
+                                    }
+                                    remaining = &remaining[pos + 1..];
+                                } else {
+                                    let mut rt = egui::RichText::new(remaining)
                                         .size(style.font_size)
-                                        .color(colors.text)
-                                ).wrap()
-                            );
+                                        .color(colors.text);
+                                    if is_heading {
+                                        rt = rt.strong();
+                                    }
+                                    ui.add(egui::Label::new(rt).wrap());
+                                    break;
+                                }
+                            }
                         },
                     );
                 });