chore: remove debug logging

Remove temporary console.log and eprintln! statements added during
troubleshooting the model configuration issue.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/zclaw-kernel/src/kernel.rs

@@ -119,8 +119,6 @@ impl Kernel {
         // This ensures user's "模型与 API" settings are respected
         let model = self.config.model().to_string();
 
-        eprintln!("[Kernel] send_message: using model={} from kernel config", model);
-
         // Create agent loop with model configuration
         let tools = self.create_tool_registry();
         let loop_runner = AgentLoop::new(
@@ -166,8 +164,6 @@ impl Kernel {
         // This ensures user's "模型与 API" settings are respected
         let model = self.config.model().to_string();
 
-        eprintln!("[Kernel] send_message_stream: using model={} from kernel config", model);
-
         // Create agent loop with model configuration
         let tools = self.create_tool_registry();
         let loop_runner = AgentLoop::new(