T16 review fixes: an unknown system zone stops instead of reading as UTC, the view window refits when data shrinks, the volume profile counts narrow and flat candles whole, Fibonacci labels stay in their pane, the DOM ladder shows its tick's decimals, the tape flashes on each new trade, typed numbers reach their owner before a press, and a smaller loss than expected reads as a beat

src/finance/wallet.rs

@@ -13,7 +13,11 @@ use crate::{
     forms::{Combobox, NumberInput, TextInput},
     primitives::{Icon, IconName},
     theme::{ActiveTheme, IconSize, Radius, TextSize},
-    typography::{Ellipsis, format, tabular},
+    typography::{
+        Ellipsis,
+        format::{self, system_zone},
+        tabular,
+    },
 };
 
 type OnConvert = Rc<dyn Fn(f64, SharedString, SharedString, &mut Window, &mut App)>;
@@ -309,7 +313,7 @@ pub struct Transfer {
 #[derive(IntoElement)]
 pub struct TransactionList {
     transfers: Vec<Transfer>,
-    zone: TimeZone,
+    zone: Option<TimeZone>,
 }
 
 impl TransactionList {
@@ -318,13 +322,13 @@ impl TransactionList {
         transfers.sort_by_key(|transfer| Reverse(transfer.time));
         Self {
             transfers,
-            zone: TimeZone::system(),
+            zone: None,
         }
     }
 
     /// The time zone its times read in; the system's unless set.
     pub fn zone(mut self, zone: TimeZone) -> Self {
-        self.zone = zone;
+        self.zone = Some(zone);
         self
     }
 }
@@ -342,6 +346,10 @@ fn amount(value: f64, unit: &str) -> String {
 
 impl RenderOnce for TransactionList {
     fn render(self, _: &mut Window, cx: &mut App) -> impl IntoElement {
+        let zone = self
+            .zone
+            .clone()
+            .unwrap_or_else(|| system_zone("TransactionList"));
         let theme = cx.theme();
         let colors = theme.colors.clone();
         div()
@@ -397,7 +405,7 @@ impl RenderOnce for TransactionList {
                                     .child(
                                         transfer
                                             .time
-                                            .to_zoned(self.zone.clone())
+                                            .to_zoned(zone.clone())
                                             .strftime("%b %-d, %H:%M")
                                             .to_string(),
                                     ),