refactor: use cce_ui::color hex parser instead of a local copy

Delegate the local hex-color parse to cce_ui::color::parse_hex_* (single source
of truth), preserving the function signature and gamma handling.

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

 src/main.rs | 36 +++---------------------------------
 1 file changed, 3 insertions(+), 33 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 3000627..72dd0ad 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -125,15 +125,7 @@ pub(crate) fn make_text_buffer(fs: &mut FontSystem, text: &str, size: f32, font_
 }
 
 pub(crate) fn parse_hex_to_rgba(hex: &str) -> Option<[f32; 4]> {
-    let s = hex.trim_start_matches('#');
-    if s.len() == 6 {
-        let r = u8::from_str_radix(&s[0..2], 16).ok()? as f32 / 255.0;
-        let g = u8::from_str_radix(&s[2..4], 16).ok()? as f32 / 255.0;
-        let b = u8::from_str_radix(&s[4..6], 16).ok()? as f32 / 255.0;
-        Some([r, g, b, 1.0])
-    } else {
-        None
-    }
+    cce_ui::color::parse_hex_rgba(hex)
 }
 
 pub(crate) fn parse_viewport_text(input: &str) -> Vec<([f32; 4], String)> {
@@ -3354,32 +3346,10 @@ fn parse_color_from_key(content: &str, key: &str) -> Option<[f32; 4]> {
 }
 
 fn parse_hex(s: &str) -> Option<[u8; 3]> {
-    let s = s.trim_start_matches('#');
-    if s.len() >= 6 {
-        let r = u8::from_str_radix(&s[0..2], 16).ok()?;
-        let g = u8::from_str_radix(&s[2..4], 16).ok()?;
-        let b = u8::from_str_radix(&s[4..6], 16).ok()?;
-        Some([r, g, b])
-    } else {
-        None
-    }
+    cce_ui::color::parse_hex_bytes(s).map(|[r, g, b, _]| [r, g, b])
 }
 fn parse_hex_rgba(s: &str) -> Option<[u8; 4]> {
-    let s = s.trim_start_matches('#');
-    if s.len() == 8 {
-        let r = u8::from_str_radix(&s[0..2], 16).ok()?;
-        let g = u8::from_str_radix(&s[2..4], 16).ok()?;
-        let b = u8::from_str_radix(&s[4..6], 16).ok()?;
-        let a = u8::from_str_radix(&s[6..8], 16).ok()?;
-        Some([r, g, b, a])
-    } else if s.len() == 6 {
-        let r = u8::from_str_radix(&s[0..2], 16).ok()?;
-        let g = u8::from_str_radix(&s[2..4], 16).ok()?;
-        let b = u8::from_str_radix(&s[4..6], 16).ok()?;
-        Some([r, g, b, 255])
-    } else {
-        None
-    }
+    cce_ui::color::parse_hex_bytes(s)
 }
 
 fn parse_rgba_color_from_key(content: &str, key: &str) -> Option<[f32; 4]> {