Fix: ö/ò in DINOBYTE vertauscht, quad_net-Plugin-Fehler im Browser abgefangen

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/gfx.rs

@@ -56,6 +56,12 @@ const CP437_LOW: &str = " ☺☻♥♦♣♠•◘○◙♂♀♪♫☼►◄↕
 const CP437_HIGH: &str = "ÇüéâäàåçêëèïîìÄÅÉæÆôöòûùÿÖÜ¢£¥₧ƒáíóúñѪº¿⌐¬½¼¡«»░▒▓│┤╡╢╖╕╣║╗╝╜╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀αßΓπΣσµτΦΘΩδ∞φε∩≡±≥≤⌠⌡÷≈°∙·√ⁿ²■\u{a0}";
 
 pub fn cp437(ch: char) -> u8 {
+    // In DINOBYTE sind ö (0x94) und ò (0x95) vertauscht
+    match ch {
+        'ö' => return 0x95,
+        'ò' => return 0x94,
+        _ => {}
+    }
     let u = ch as u32;
     if (32..127).contains(&u) {
         return u as u8;