✨ Quality: Micro-improvements - useDebounce robustness and component debuggability

[galiprandi]

💡 What: The quality improvement added

• Optimized useDebounce hook to avoid unnecessary setTimeout on initial mount.
• Added defensive checks in useDebounce for delay (negative or NaN) to update state immediately.
• Added displayName to AsyncBlock, Observer, and LazyRender components.
• Improved useDebounce test suite with new edge cases and relative imports.

🎯 Why: The quality gap it addresses

• useDebounce was performing a redundant setTimeout on mount.
• Missing validation for non-positive or invalid delay values in useDebounce.
• Components without displayName are harder to identify in React DevTools.
• Unit tests using entry-point imports instead of local relative ones can lead to coupling and resolution issues.

📊 Impact: How it improves the codebase

• Better performance on initial mount for components using useDebounce.
• Increased robustness of useDebounce against invalid runtime parameters.
• Improved developer experience when debugging with React DevTools.
• Cleaner and more exhaustive test suite.

✅ Verification: How to verify it works

• Run pnpm test lib/hooks/useDebounce.test.ts to see 100% coverage and passing tests.
• Run pnpm build to ensure no regressions in the build process.
• Inspect the modified files to verify displayName additions.

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PR created automatically by Jules for task 14092883441630026676 started by @galiprandi

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