Port upstream UI polish and refresh dependencies

Bring over selected Warp UI improvements: selectable Thought text, message
timestamps, animated theme backgrounds, editable New Window shortcuts,
safer tab renaming and restoration, and text/font/discard crash fixes.

Match upstream orchestration pill geometry and tooltips, and replace expanded
subagent previews with compact links that retain live status and conversation
navigation for launches and follow-up messages.

Include the pending Cargo.lock dependency refresh.

Adapted upstream PRs: #15948, #15884, #15691, #14618, #15772, #15705,
#15605, #14895, #15996, #15771, #14893, and #14603.

app/src/util/bindings.rs

@@ -383,7 +383,6 @@ pub fn custom_tag_to_keystroke(custom: CustomTag) -> Option<Keystroke> {
             }
         }
 
-        // This is one of the app's hardcoded keybindings.
         CustomAction::AddWindow => Keystroke::parse(cmd_or_ctrl_shift("n")).ok(),
         CustomAction::ToggleGalaxyDrive => {
             if OperatingSystem::get().is_mac() {

app/src/util/time_format.rs

@@ -2,6 +2,14 @@ use std::ops::Sub;
 
 use chrono::{DateTime, Duration, Local, Utc};
 
+pub fn format_message_timestamp(datetime: &DateTime<Local>) -> String {
+    datetime.format("%-m/%-d at %-I:%M %p").to_string()
+}
+
+pub fn is_trustworthy_message_timestamp(datetime: &DateTime<Local>) -> bool {
+    datetime != &DateTime::<Local>::default()
+}
+
 // Some conversion ratios for time units.
 const SEC_TO_MS: f64 = 1000.;
 const MIN_TO_MS: f64 = 60. * SEC_TO_MS;

app/src/util/time_format_tests.rs

@@ -1,5 +1,26 @@
+use chrono::TimeZone;
+
 use super::*;
 
+#[test]
+fn format_message_timestamp_uses_friendly_local_time() {
+    let morning = Local.with_ymd_and_hms(2026, 8, 10, 9, 2, 0).unwrap();
+    let noon = Local.with_ymd_and_hms(2026, 12, 31, 12, 45, 0).unwrap();
+    let midnight = Local.with_ymd_and_hms(2026, 12, 31, 0, 5, 0).unwrap();
+
+    assert_eq!(format_message_timestamp(&morning), "8/10 at 9:02 AM");
+    assert_eq!(format_message_timestamp(&noon), "12/31 at 12:45 PM");
+    assert_eq!(format_message_timestamp(&midnight), "12/31 at 12:05 AM");
+}
+
+#[test]
+fn default_message_timestamp_is_not_trustworthy() {
+    assert!(!is_trustworthy_message_timestamp(&DateTime::default()));
+    assert!(is_trustworthy_message_timestamp(
+        &Local.with_ymd_and_hms(2026, 8, 10, 9, 22, 0).unwrap()
+    ));
+}
+
 #[test]
 fn test_format_sigfigs() {
     assert_eq!(format_sigfigs(0.000456, 2,), "0.00046");