fix(config): normalize cost currency display comparison

crates/tui/src/tui/views/mod.rs

@@ -1124,14 +1124,16 @@ impl ConfigView {
     }
 
     fn row_display_value(&self, row: &ConfigRow) -> String {
-        if row.key == "cost_currency"
-            && row.scope == ConfigScope::Saved
-            && row.value != self.effective_cost_currency
-        {
-            format!("{} (effective {})", row.value, self.effective_cost_currency)
-        } else {
-            row.value.clone()
+        if row.key == "cost_currency" && row.scope == ConfigScope::Saved {
+            let saved_cost_currency = crate::pricing::CostCurrency::from_setting(&row.value);
+            let effective_cost_currency =
+                crate::pricing::CostCurrency::from_setting(&self.effective_cost_currency);
+            if saved_cost_currency != effective_cost_currency {
+                return format!("{} (effective {})", row.value, self.effective_cost_currency);
+            }
         }
+
+        row.value.clone()
     }
 }
 
@@ -2120,6 +2122,26 @@ mod tests {
         App::new(options, &Config::default())
     }
 
+    fn cost_currency_row_for_settings(
+        settings_toml: &str,
+    ) -> (String, String, crate::pricing::CostCurrency, Locale) {
+        let _guard = ConfigSettingsEnvGuard::new(settings_toml);
+        let app = create_test_app();
+        let view = ConfigView::new_for_app(&app);
+        let row = view
+            .rows
+            .iter()
+            .find(|row| row.key == "cost_currency")
+            .expect("cost_currency row");
+
+        (
+            row.value.clone(),
+            view.row_display_value(row),
+            app.cost_currency,
+            app.ui_locale,
+        )
+    }
+
     fn type_filter(view: &mut ConfigView, text: &str) {
         for ch in text.chars() {
             let action = view.handle_key(KeyEvent::new(KeyCode::Char(ch), KeyModifiers::NONE));
@@ -2319,6 +2341,43 @@ mod tests {
         assert_eq!(Settings::load().expect("settings").cost_currency, "usd");
     }
 
+    #[test]
+    fn config_view_cost_currency_aliases_matching_effective_currency_are_silent() {
+        for alias in ["rmb", "yuan", "¥"] {
+            let (saved_value, display_value, effective_currency, locale) =
+                cost_currency_row_for_settings(&format!(
+                    "locale = \"zh-Hans\"\ncost_currency = \"{alias}\"\n"
+                ));
+
+            assert_eq!(locale, Locale::ZhHans);
+            assert_eq!(effective_currency, crate::pricing::CostCurrency::Cny);
+            assert_eq!(saved_value, alias);
+            assert_eq!(display_value, alias);
+        }
+    }
+
+    #[test]
+    fn config_view_cost_currency_matching_cny_setting_is_silent() {
+        let (saved_value, display_value, effective_currency, locale) =
+            cost_currency_row_for_settings("locale = \"zh-Hans\"\ncost_currency = \"cny\"\n");
+
+        assert_eq!(locale, Locale::ZhHans);
+        assert_eq!(effective_currency, crate::pricing::CostCurrency::Cny);
+        assert_eq!(saved_value, "cny");
+        assert_eq!(display_value, "cny");
+    }
+
+    #[test]
+    fn config_view_cost_currency_non_zh_hans_locale_uses_saved_currency() {
+        let (saved_value, display_value, effective_currency, locale) =
+            cost_currency_row_for_settings("locale = \"en\"\ncost_currency = \"cny\"\n");
+
+        assert_eq!(locale, Locale::En);
+        assert_eq!(effective_currency, crate::pricing::CostCurrency::Cny);
+        assert_eq!(saved_value, "cny");
+        assert_eq!(display_value, "cny");
+    }
+
     #[test]
     fn config_view_exposes_all_available_saved_settings() {
         let app = create_test_app();