fix(ci): grant write permissions to interactive Claude workflow

The contents, pull-requests, and issues permissions were set to read, preventing Claude from pushing commits and commenting on PRs/issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/claude.yml

@@ -19,9 +19,9 @@ jobs:
       (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
     runs-on: ubuntu-latest
     permissions:
-      contents: read
-      pull-requests: read
-      issues: read
+      contents: write
+      pull-requests: write
+      issues: write
       id-token: write
       actions: read # Required for Claude to read CI results on PRs
     steps: