chore: migrate GitHub workflows from @beta to @v1 (#486)

* tmp

* chore: migrate GitHub workflows from @beta to @v1

- Update claude.yml and issue-triage.yml to use claude-code-action@v1
- Migrate deprecated inputs to new claude_args format
- Move mcp_config to --mcp-config in claude_args
- Follow v1 migration guide for simplified configuration

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

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/claude.yml

@@ -31,9 +31,9 @@ jobs:
 
       - name: Run Claude Code
         id: claude
-        uses: anthropics/claude-code-action@beta
+        uses: anthropics/claude-code-action@v1
         with:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
-          allowed_tools: "Bash(bun install),Bash(bun test:*),Bash(bun run format),Bash(bun typecheck)"
-          custom_instructions: "You have also been granted tools for editing files and running bun commands (install, run, test, typecheck) for testing your changes: bun install, bun test, bun run format, bun typecheck."
-          model: "claude-opus-4-1-20250805"
+          claude_args: |
+            --allowedTools "Bash(bun install),Bash(bun test:*),Bash(bun run format),Bash(bun typecheck)"
+            --model "claude-opus-4-1-20250805"