feat(core, cli): add rate limit throttling retry with countdown UI

- Refactor retry utility to support GLM rate limit errors (code 1302) and TPM throttling
- Add getRateLimitRetryInfo() for unified rate-limit error detection
- Add exponential backoff for non-TPM rate limit errors
- Extend StreamEventType.RETRY with RetryInfo payload for UI feedback
- Add RetryCountdownMessage component for visual retry countdown
- Update useGeminiStream hook to handle retry events with countdown timer
- Add i18n support for rate limit messages (en/zh)

packages/cli/src/ui/components/messages/RetryCountdownMessage.tsx

@@ -0,0 +1,41 @@
+/**
+ * @license
+ * Copyright 2025 Qwen
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type React from 'react';
+import { Text, Box } from 'ink';
+import { theme } from '../../semantic-colors.js';
+
+interface RetryCountdownMessageProps {
+  text: string;
+}
+
+/**
+ * Displays a retry countdown message in a dimmed/secondary style
+ * to visually distinguish it from error messages.
+ */
+export const RetryCountdownMessage: React.FC<RetryCountdownMessageProps> = ({
+  text,
+}) => {
+  if (!text || text.trim() === '') {
+    return null;
+  }
+
+  const prefix = '↻ ';
+  const prefixWidth = prefix.length;
+
+  return (
+    <Box flexDirection="row">
+      <Box width={prefixWidth}>
+        <Text color={theme.text.secondary}>{prefix}</Text>
+      </Box>
+      <Box flexGrow={1}>
+        <Text wrap="wrap" color={theme.text.secondary}>
+          {text}
+        </Text>
+      </Box>
+    </Box>
+  );
+};