refactor: create FontSystem via cce_ui::create_font_system_with_system_fonts

Use the shared cce_ui helper (system + bundled CCE fonts) instead of a bare
glyphon::FontSystem::new(). For the five apps that used FontSystem::new() this
additionally loads the bundled CCE fonts; the two hybrids drop their manual
load_fonts_dir call. Additive — no font source is lost.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

 src/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index 82ce18c..a9fb273 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -951,7 +951,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     }, None)).expect("Failed to request wgpu device");
 
     // Initialize renderer resources once
-    let font_system = FontSystem::new();
+    let font_system = cce_ui::create_font_system_with_system_fonts();
     let swash_cache = SwashCache::new();
     let cache = Cache::new(&wgpu_device);
     let mut text_atlas = TextAtlas::new(&wgpu_device, &wgpu_queue, &cache, wgpu::TextureFormat::Bgra8Unorm);