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/ai/chatgpt_auth.rs

@@ -61,6 +61,13 @@ impl ChatGPTAuthModel {
         Self { state }
     }
 
+    #[cfg(test)]
+    pub(crate) fn new_for_test() -> Self {
+        Self {
+            state: ChatGPTAuthState::NotConnected,
+        }
+    }
+
     pub(crate) fn state(&self) -> &ChatGPTAuthState {
         &self.state
     }