clippy: replace is_some+unwrap with if let in mcp bearer rewriter

Co-Authored-By: Claude Opus 4.7 <[email protected]>

crates/cm-api/src/research_container.rs

@@ -646,16 +646,16 @@ fn prewrite_daemon_config_with_risk(
             }
         }
         if in_mcp_clawmates
-            && mcp_bearer_override.is_some()
             && trimmed.starts_with("headers")
             && trimmed.contains("Authorization")
         {
-            let bearer = mcp_bearer_override.unwrap();
+            if let Some(bearer) = mcp_bearer_override {
                 out.push_str(&format!(
                     "headers = {{ Authorization = \"Bearer {bearer}\" }}\n"
                 ));
                 continue;
             }
+        }
         if in_agent_block && trimmed.starts_with("risk_profile = \"") {
             if let Some(r) = &risk_replacement {
                 out.push_str(r);