Fix: Correct secrets access in reusable workflow (#3)

In reusable workflows (workflow_call), secrets need to be checked
with != '' syntax, not just using && boolean logic. Also removed
the unnecessary if condition on the Claude step since ANTHROPIC_API_KEY
is required.

Co-authored-by: jaysonv0341 <jaysonv0341@users.noreply.github.com>

Author: jaysonv0341

.github/workflows/claude-review.yml

@@ -44,15 +44,14 @@ jobs:
       # (Optional) Generate a GitHub App token for better commenting behavior
       - name: Generate GitHub App token
         id: app-token
-        if: ${{ secrets.APP_ID && secrets.APP_PRIVATE_KEY }}
+        if: ${{ secrets.APP_ID != '' && secrets.APP_PRIVATE_KEY != '' }}
         uses: actions/create-github-app-token@v2
         with:
           app-id: ${{ secrets.APP_ID }}
           private-key: ${{ secrets.APP_PRIVATE_KEY }}
 
 
       - name: Run Claude via Anthropic API
-        if: ${{ secrets.ANTHROPIC_API_KEY != '' }}
         uses: anthropics/claude-code-action-official@v1
         with:
           github_token: ${{ steps.app-token.outputs.token || secrets.GITHUB_TOKEN }}