Shaper includes system symbol fonts into cache

This should fix #153 on Windows but needs testing on Linux and macOS.

src/renderer/caching_shaper.rs

@@ -16,6 +16,15 @@ const EMOJI_FONT: &str = "NotoColorEmoji.ttf";
 const WIDE_FONT: &str = "NotoSansMonoCJKjp-Regular.otf";
 const WIDE_BOLD_FONT: &str = "NotoSansMonoCJKjp-Bold.otf";
 
+#[cfg(target_os = "windows")]
+const SYSTEM_SYMBOL_FONT: &str = "Segoe UI Symbol";
+
+#[cfg(target_os = "linux")]
+const SYSTEM_SYMBOL_FONT: &str = "Unifont";
+
+#[cfg(target_os = "macos")]
+const SYSTEM_SYMBOL_FONT: &str = "Apple Symbols";
+
 #[cfg(target_os = "windows")]
 const SYSTEM_EMOJI_FONT: &str = "Segoe UI Emoji";
 
@@ -25,6 +34,7 @@ const SYSTEM_EMOJI_FONT: &str = "Apple Color Emoji";
 #[cfg(target_os = "linux")]
 const SYSTEM_EMOJI_FONT: &str = "Noto Color Emoji";
 
+
 #[derive(RustEmbed)]
 #[folder = "assets/fonts/"]
 struct Asset;
@@ -86,6 +96,11 @@ fn build_collection_by_font_name(font_name: Option<&str>, bold: bool, italic: bo
         collection.add_family(FontFamily::new_from_font(font));
     }
 
+    if let Ok(sys_symbol) = source.select_family_by_name(SYSTEM_SYMBOL_FONT) {
+        let font = sys_symbol.fonts()[0].load().unwrap();
+        collection.add_family(FontFamily::new_from_font(font));
+    }
+
     if cfg!(not(target_os = "macos")) {
         let emoji_data = Asset::get(EMOJI_FONT).expect("Failed to read emoji font data");
         let emoji_font = Font::from_bytes(emoji_data.to_vec().into(), 0).expect("Failed to parse emoji font data");