chore: update default model to sonnet 3.7 (#374)

Author: brandonskiser

crates/chat-cli/src/cli/chat/cli/model.rs

@@ -14,7 +14,6 @@ use crate::cli::chat::{
     ChatSession,
     ChatState,
 };
-use crate::os::Os;
 
 pub struct ModelOption {
     pub name: &'static str,
@@ -99,9 +98,6 @@ impl ModelArgs {
 }
 
 /// Currently, Sonnet 4 is set as the default model for non-FRA users.
-pub fn default_model_id(os: &Os) -> &'static str {
-    match os.database.get_auth_profile() {
-        Ok(Some(profile)) if profile.arn.split(':').nth(3) == Some("eu-central-1") => "CLAUDE_3_7_SONNET_20250219_V1_0",
-        _ => "CLAUDE_SONNET_4_20250514_V1_0",
-    }
+pub fn default_model_id() -> &'static str {
+    "CLAUDE_3_7_SONNET_20250219_V1_0"
 }

crates/chat-cli/src/cli/chat/mod.rs

@@ -536,7 +536,7 @@ impl ChatSession {
                             .map(|opt| opt.model_id.to_owned())
                     })
             })
-            .unwrap_or_else(|| default_model_id(os).to_owned());
+            .unwrap_or_else(|| default_model_id().to_owned());
 
         // Reload prior conversation
         let mut existing_conversation = false;