fix(claude): Use OAuth token and enable assignee trigger for PRs and issues

Switched from anthropic_api_key to claude_code_oauth_token to match the
stored secret type. Added pull_request assigned event and assignee_trigger
so Claude can be assigned directly to PRs and issues.

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

Author: jamesrweb

.github/workflows/claude.yml

@@ -7,6 +7,8 @@ on:
     types: [created]
   issues:
     types: [opened, assigned]
+  pull_request:
+    types: [assigned]
   pull_request_review:
     types: [submitted]
 
@@ -16,7 +18,8 @@ jobs:
       (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
-      (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
+      (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude'))) ||
+      (github.event_name == 'pull_request')
     runs-on: ubuntu-latest
     permissions:
       contents: write
@@ -34,13 +37,13 @@ jobs:
         id: claude
         uses: anthropics/claude-code-action@v1
         with:
-          anthropic_api_key: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
+          claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
 
           # Optional: Customize the trigger phrase (default: @claude)
           # trigger_phrase: "/claude"
 
-          # Optional: Trigger when specific user is assigned to an issue
-          # assignee_trigger: "claude-bot"
+          # Trigger when "claude" is assigned to an issue or PR
+          assignee_trigger: "claude"
 
           # Optional: Configure Claude's behavior with CLI arguments
           # claude_args: |