fix: 로딩 화면 분석 프로세스 텍스트 영어 통일

- planning 단계 'AI 콘텐츠 전략 생성 중...' → 'Generating AI content strategy...'
- labelDone '콘텐츠 플랜 생성 완료' → 'Content plan generated'

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

src/pages/AnalysisLoadingPage.tsx

@@ -16,7 +16,7 @@ const PHASE_STEPS = [
   { key: 'discovering' as Phase, label: 'Scanning website & discovering channels...', labelDone: 'Channels discovered' },
   { key: 'collecting' as Phase, label: 'Collecting channel data & market analysis...', labelDone: 'Data collected' },
   { key: 'generating' as Phase, label: 'Generating AI marketing report...', labelDone: 'Report generated' },
-  { key: 'planning' as Phase, label: 'AI 콘텐츠 전략 생성 중...', labelDone: '콘텐츠 플랜 생성 완료' },
+  { key: 'planning' as Phase, label: 'Generating AI content strategy...', labelDone: 'Content plan generated' },
   { key: 'complete' as Phase, label: 'Finalizing report...', labelDone: 'Complete' },
 ];