feat: parse and display rate_limit_event messages from Claude CLI

Closes #155

- Add RateLimitInfo struct and RateLimitEvent variant to ClaudeMessage
- Emit rate-limit OutputEvent with human-readable message in wsl_bridge
- Add rate-limit line type to TerminalLine union and Terminal rendering
- Display rate-limit lines in amber with [rate-limit] prefix
- Add Terminal.test.ts with 28 tests for getLineClass, getLinePrefix,
  formatTime, isToolContentLong, and truncateToolContent

src-tauri/src/wsl_bridge.rs

@@ -1521,6 +1521,23 @@ fn process_json_line(
             emit_state_change(app, state, None, conversation_id.clone());
         }
 
+        ClaudeMessage::RateLimitEvent { rate_limit_info } => {
+            tracing::warn!("Rate limit event received: {:?}", rate_limit_info);
+
+            let content = format_rate_limit_message(rate_limit_info);
+            let _ = app.emit(
+                "claude:output",
+                OutputEvent {
+                    line_type: "rate-limit".to_string(),
+                    content,
+                    tool_name: None,
+                    conversation_id: conversation_id.clone(),
+                    cost: None,
+                    parent_tool_use_id: None,
+                },
+            );
+        }
+
         ClaudeMessage::User { message } => {
             // Increment message count for user messages
             stats.write().increment_messages();
@@ -1629,6 +1646,35 @@ fn get_tool_state(tool_name: &str) -> CharacterState {
     }
 }
 
+fn format_rate_limit_message(info: &crate::types::RateLimitInfo) -> String {
+    let mut parts = Vec::new();
+
+    if let (Some(remaining), Some(limit)) = (info.requests_remaining, info.requests_limit) {
+        parts.push(format!("requests: {}/{}", remaining, limit));
+    }
+
+    if let (Some(remaining), Some(limit)) = (info.tokens_remaining, info.tokens_limit) {
+        parts.push(format!("tokens: {}/{}", remaining, limit));
+    }
+
+    if let Some(reset) = &info.requests_reset {
+        parts.push(format!("resets at {}", reset));
+    } else if let Some(reset) = &info.tokens_reset {
+        parts.push(format!("resets at {}", reset));
+    }
+
+    if let Some(retry_ms) = info.retry_after_ms {
+        let secs = retry_ms / 1000;
+        parts.push(format!("retry after {}s", secs));
+    }
+
+    if parts.is_empty() {
+        "Rate limit reached".to_string()
+    } else {
+        format!("Rate limit reached — {}", parts.join(", "))
+    }
+}
+
 fn format_tool_description(name: &str, input: &serde_json::Value) -> String {
     // Helper function to check if a path is a memory file
     fn is_memory_path(path: &str) -> bool {