fix(js): resolve TypeScript compilation errors blocking test execution

[Copilot]

Pre-existing TypeScript errors in add_labels.cjs, safe_output_handler_manager.cjs, and update_runner.cjs blocked npm test from running, preventing validation of the jsweep refactoring in PR #8179.

Changes

• add_labels.cjs: Renamed parameter config → handlerConfig to eliminate duplicate identifier; changed null → undefined for optional envVar types
• safe_output_handler_manager.cjs: Corrected JSDoc return type temporaryIdMap: Map → temporaryIdMap: Object to match actual implementation
• update_runner.cjs: Added handlerConfig?: any parameter to executeUpdate function signature in UpdateRunnerConfig typedef

Context

The npm test command runs npm run typecheck first. TypeScript compilation failed on these files before any tests could execute. These errors existed on main branch and were unrelated to the add_reaction_and_edit_comment.cjs changes.

// Before: Duplicate identifier error
async function main(config = {}) {
  const result = await processSafeOutput(/* ... */, config);
  const { config } = result; // ❌ Duplicate 'config'
}

// After: Resolved
async function main(handlerConfig = {}) {
  const result = await processSafeOutput(/* ... */, handlerConfig);
  const { config } = result; // ✅ Distinct identifiers
}

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.