acp: Load agent panel even if serialized config is bogus (#37134)

Closes #ISSUE

Release Notes:

- N/A

crates/agent_ui/src/agent_panel.rs

@@ -86,7 +86,7 @@ use zed_actions::{
 
 const AGENT_PANEL_KEY: &str = "agent_panel";
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, Debug)]
 struct SerializedAgentPanel {
     width: Option<Pixels>,
     selected_agent: Option<AgentType>,
@@ -592,7 +592,7 @@ impl AgentPanel {
                 .log_err()
                 .flatten()
             {
-                Some(serde_json::from_str::<SerializedAgentPanel>(&panel)?)
+                serde_json::from_str::<SerializedAgentPanel>(&panel).log_err()
             } else {
                 None
             };