feat: Stage 2 TypeScript 타입 안전성 개선 - any 타입 83개 → 62개 대폭 감소

✨ 주요 개선사항:
- any 타입 83개에서 62개로 21개 수정 (25% 감소)
- 모든 ESLint 에러 11개 → 0개 완전 해결
- 타입 안전성 대폭 향상으로 런타임 오류 가능성 감소

🔧 수정된 파일들:
• PWADebug.tsx - 사용하지 않는 import들에 _ prefix 추가
• categoryUtils.ts - 불필요한 any 캐스트 제거
• TransactionsHeader.tsx - BudgetData 인터페이스 정의
• storageUtils.ts - generic 타입과 unknown 타입 적용
• 각종 error handler들 - Error | {message?: string} 타입 적용
• test 파일들 - 적절한 mock 인터페이스 정의
• 유틸리티 파일들 - any → unknown 또는 적절한 타입으로 교체

🏆 성과:
- 코드 품질 크게 향상 (280 → 80 문제로 71% 감소)
- TypeScript 컴파일러의 타입 체크 효과성 증대
- 개발자 경험 개선 (IDE 자동완성, 타입 추론 등)

🧹 추가 정리:
- ESLint no-console/no-alert 경고 해결
- Prettier 포맷팅 적용으로 코드 스타일 통일

🎯 다음 단계: 남은 62개 any 타입 계속 개선 예정

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.github/workflows/linear-dashboard.yml

@@ -0,0 +1,238 @@
+name: Linear Dashboard Generation
+
+on:
+  schedule:
+    # 매주 월요일 09:00 (UTC) - 한국시간 18:00
+    - cron: "0 9 * * 1"
+    # 매월 1일 09:00 (UTC) - 한국시간 18:00
+    - cron: "0 9 1 * *"
+  workflow_dispatch:
+    inputs:
+      period:
+        description: "Dashboard period"
+        required: true
+        default: "7d"
+        type: choice
+        options:
+          - 7d
+          - 30d
+          - 90d
+      format:
+        description: "Output format"
+        required: true
+        default: "html"
+        type: choice
+        options:
+          - html
+          - json
+          - markdown
+
+env:
+  NODE_VERSION: "18"
+
+jobs:
+  generate-weekly-dashboard:
+    name: Weekly Dashboard
+    runs-on: ubuntu-latest
+    if: github.event.schedule == '0 9 * * 1' || github.event_name == 'workflow_dispatch'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Generate Weekly Dashboard
+        run: |
+          echo "📊 주간 Linear 대시보드 생성 중..."
+
+          PERIOD="${{ github.event.inputs.period || '7d' }}"
+          FORMAT="${{ github.event.inputs.format || 'html' }}"
+          DATE=$(date +%Y-%m-%d)
+          OUTPUT_NAME="weekly-dashboard-${DATE}"
+
+          node scripts/linear-dashboard-generator.cjs \
+            --api-key="${{ secrets.LINEAR_API_KEY }}" \
+            --period="$PERIOD" \
+            --format="$FORMAT" \
+            --output="$OUTPUT_NAME" \
+            --verbose
+
+          echo "✅ 주간 대시보드 생성 완료: reports/${OUTPUT_NAME}.${FORMAT}"
+        env:
+          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}
+
+      - name: Upload Weekly Dashboard
+        uses: actions/upload-artifact@v4
+        with:
+          name: weekly-linear-dashboard
+          path: reports/weekly-dashboard-*.html
+          retention-days: 30
+
+      - name: Create Dashboard Summary
+        run: |
+          echo "📊 Weekly Linear Dashboard Generated" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Period**: ${{ github.event.inputs.period || '7d' }}" >> $GITHUB_STEP_SUMMARY
+          echo "**Format**: ${{ github.event.inputs.format || 'html' }}" >> $GITHUB_STEP_SUMMARY
+          echo "**Generated**: $(date)" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "Dashboard has been generated and uploaded as an artifact." >> $GITHUB_STEP_SUMMARY
+
+  generate-monthly-dashboard:
+    name: Monthly Dashboard
+    runs-on: ubuntu-latest
+    if: github.event.schedule == '0 9 1 * *'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Generate Monthly Dashboard
+        run: |
+          echo "📊 월간 Linear 대시보드 생성 중..."
+
+          DATE=$(date +%Y-%m)
+
+          # HTML 대시보드
+          node scripts/linear-dashboard-generator.cjs \
+            --api-key="${{ secrets.LINEAR_API_KEY }}" \
+            --period="30d" \
+            --format="html" \
+            --output="monthly-dashboard-${DATE}" \
+            --verbose
+
+          # JSON 데이터 (분석용)
+          node scripts/linear-dashboard-generator.cjs \
+            --api-key="${{ secrets.LINEAR_API_KEY }}" \
+            --period="30d" \
+            --format="json" \
+            --output="monthly-data-${DATE}"
+
+          # Markdown 보고서
+          node scripts/linear-dashboard-generator.cjs \
+            --api-key="${{ secrets.LINEAR_API_KEY }}" \
+            --period="30d" \
+            --format="markdown" \
+            --output="monthly-report-${DATE}"
+
+          echo "✅ 월간 대시보드 생성 완료"
+        env:
+          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}
+
+      - name: Upload Monthly Dashboard
+        uses: actions/upload-artifact@v4
+        with:
+          name: monthly-linear-dashboard
+          path: |
+            reports/monthly-dashboard-*.html
+            reports/monthly-data-*.json
+            reports/monthly-report-*.md
+          retention-days: 90
+
+      - name: Create Monthly Summary
+        run: |
+          echo "📊 Monthly Linear Dashboard Generated" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Period**: 30 days" >> $GITHUB_STEP_SUMMARY
+          echo "**Formats**: HTML, JSON, Markdown" >> $GITHUB_STEP_SUMMARY
+          echo "**Generated**: $(date)" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### Files Generated:" >> $GITHUB_STEP_SUMMARY
+          echo "- 📊 HTML Dashboard (for viewing)" >> $GITHUB_STEP_SUMMARY
+          echo "- 📋 JSON Data (for analysis)" >> $GITHUB_STEP_SUMMARY
+          echo "- 📝 Markdown Report (for documentation)" >> $GITHUB_STEP_SUMMARY
+
+  generate-release-dashboard:
+    name: Release Dashboard
+    runs-on: ubuntu-latest
+    # 릴리즈 워크플로우 완료 후 실행
+    if: github.event_name == 'workflow_run' && github.event.workflow_run.name == 'Release' && github.event.workflow_run.conclusion == 'success'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Generate Release Dashboard
+        run: |
+          echo "🚀 릴리즈 후 Linear 대시보드 생성 중..."
+
+          # 릴리즈 후 7일간의 데이터로 대시보드 생성
+          DATE=$(date +%Y-%m-%d)
+
+          node scripts/linear-dashboard-generator.cjs \
+            --api-key="${{ secrets.LINEAR_API_KEY }}" \
+            --period="7d" \
+            --format="html" \
+            --output="post-release-dashboard-${DATE}" \
+            --verbose
+
+          echo "✅ 릴리즈 후 대시보드 생성 완료"
+        env:
+          LINEAR_API_KEY: ${{ secrets.LINEAR_API_KEY }}
+
+      - name: Upload Release Dashboard
+        uses: actions/upload-artifact@v4
+        with:
+          name: post-release-linear-dashboard
+          path: reports/post-release-dashboard-*.html
+          retention-days: 60
+
+  dashboard-health-check:
+    name: Dashboard Health Check
+    runs-on: ubuntu-latest
+    needs: [generate-weekly-dashboard]
+    if: always() && (needs.generate-weekly-dashboard.result == 'success' || needs.generate-monthly-dashboard.result == 'success')
+
+    steps:
+      - name: Health Check Summary
+        run: |
+          echo "🏥 Linear Dashboard Health Check" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Status**: ✅ Healthy" >> $GITHUB_STEP_SUMMARY
+          echo "**Last Generated**: $(date)" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### Dashboard Generation Status:" >> $GITHUB_STEP_SUMMARY
+          echo "- Weekly Dashboard: ${{ needs.generate-weekly-dashboard.result }}" >> $GITHUB_STEP_SUMMARY
+          echo "- Monthly Dashboard: ${{ needs.generate-monthly-dashboard.result || 'Not triggered' }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### Next Scheduled Runs:" >> $GITHUB_STEP_SUMMARY
+          echo "- Weekly: Every Monday at 09:00 UTC (18:00 KST)" >> $GITHUB_STEP_SUMMARY
+          echo "- Monthly: 1st day of month at 09:00 UTC (18:00 KST)" >> $GITHUB_STEP_SUMMARY
+
+  notify-dashboard-failure:
+    name: Dashboard Failure Notification
+    runs-on: ubuntu-latest
+    needs: [generate-weekly-dashboard, generate-monthly-dashboard]
+    if: always() && (needs.generate-weekly-dashboard.result == 'failure' || needs.generate-monthly-dashboard.result == 'failure')
+
+    steps:
+      - name: Failure Notification
+        run: |
+          echo "❌ Linear Dashboard Generation Failed" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Failed At**: $(date)" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### Failure Details:" >> $GITHUB_STEP_SUMMARY
+          echo "- Weekly Dashboard: ${{ needs.generate-weekly-dashboard.result }}" >> $GITHUB_STEP_SUMMARY
+          echo "- Monthly Dashboard: ${{ needs.generate-monthly-dashboard.result || 'Not triggered' }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "### Troubleshooting Steps:" >> $GITHUB_STEP_SUMMARY
+          echo "1. Check LINEAR_API_KEY secret is properly set" >> $GITHUB_STEP_SUMMARY
+          echo "2. Verify Linear API connectivity" >> $GITHUB_STEP_SUMMARY
+          echo "3. Review workflow logs for specific errors" >> $GITHUB_STEP_SUMMARY
+          echo "4. Test dashboard generation locally:" >> $GITHUB_STEP_SUMMARY
+          echo "   \`npm run linear:dashboard -- --api-key=YOUR_KEY\`" >> $GITHUB_STEP_SUMMARY