fix: resolve merge conflict in claude_code.rs

Keep master's quiet system/rate_limit_event handlers while preserving
the story-62 permission_request handler (the core feature).

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

server/src/llm/chat.rs

@@ -183,6 +183,11 @@ pub async fn chat<F, U>(
     store: &dyn StoreOps,
     mut on_update: F,
     mut on_token: U,
+    permission_tx: Option<
+        tokio::sync::mpsc::UnboundedSender<
+            crate::llm::providers::claude_code::PermissionReqMsg,
+        >,
+    >,
 ) -> Result<ChatResult, String>
 where
     F: FnMut(&[Message]) + Send,
@@ -238,6 +243,7 @@ where
                 config.session_id.as_deref(),
                 &mut cancel_rx,
                 |token| on_token(token),
+                permission_tx,
             )
             .await
             .map_err(|e| format!("Claude Code Error: {e}"))?;