feat(ui): enhance LoadingIndicator to display token counts and improve formatting

- Added candidatesTokens prop to LoadingIndicator for displaying token counts.
- Updated formatting to show elapsed time and token counts inline.
- Refactored tests to validate new token display functionality and formatting changes.
- Introduced formatTokenCount utility for consistent token count representation.

This improves user feedback during loading states by providing clearer information on token usage.

packages/cli/src/ui/utils/formatters.test.ts

@@ -9,6 +9,7 @@ import {
   formatDuration,
   formatMemoryUsage,
   formatRelativeTime,
+  formatTokenCount,
 } from './formatters.js';
 
 describe('formatters', () => {
@@ -154,4 +155,25 @@ describe('formatters', () => {
       expect(formatDuration(-100)).toBe('0s');
     });
   });
+
+  describe('formatTokenCount', () => {
+    it('should display exact number for counts less than 1000', () => {
+      expect(formatTokenCount(0)).toBe('0');
+      expect(formatTokenCount(100)).toBe('100');
+      expect(formatTokenCount(847)).toBe('847');
+      expect(formatTokenCount(999)).toBe('999');
+    });
+
+    it('should display with k suffix and one decimal for counts 1000-9999', () => {
+      expect(formatTokenCount(1000)).toBe('1.0k');
+      expect(formatTokenCount(5400)).toBe('5.4k');
+      expect(formatTokenCount(9999)).toBe('10.0k');
+    });
+
+    it('should display with k suffix without decimal for counts 10000 and above', () => {
+      expect(formatTokenCount(10000)).toBe('10k');
+      expect(formatTokenCount(15000)).toBe('15k');
+      expect(formatTokenCount(100000)).toBe('100k');
+    });
+  });
 });