Build 57: Pay puck uses a Noto Sans JP ツ instead of Gamja Flower

Owner disliked the Gamja Flower ツ style on the center Pay puck. Replace it with
Noto Sans JP's cleaner, more geometric katakana tsu — subset to ONLY that one
glyph (~1.7 KB) the same way the old one was, loaded as the "noto-tsu" family and
drawn at the puck (mod.rs). Drop the now-unused Gamja Flower font + its license.

src/gui/views/goblin/mod.rs

@@ -446,8 +446,8 @@ impl GoblinWalletView {
 							rect.center(),
 							egui::Align2::CENTER_CENTER,
 							w::TSU,
-							// Gamja Flower's ツ — the cute smiley shape — only here.
-							FontId::new(31.0, egui::FontFamily::Name("gamja-tsu".into())),
+							// Noto Sans JP's clean ツ — the Pay puck mark, only here.
+							FontId::new(31.0, egui::FontFamily::Name("noto-tsu".into())),
 							t.accent_ink,
 						);
 					}