rendering-conditional-render

## Use Explicit Conditional Rendering Use explicit ternary operators (`? :`) instead of `&&` for conditional rendering when the condition can be `0`, `NaN`, or other falsy values that render. **Incorrect (renders "0" when count is 0):** ```tsx function Badge({ count }: { count: number }) { return ( <div> {count && <span className="badge">{count}</span>} </div> ) } // When count = 0, renders: <div>0</div> // When count = 5, renders: <div><span class="badge">5</span></div> ``` **Correct (renders nothing when count is 0):** ```tsx function Badge({ count }: { count: number }) { return ( <div> {count > 0 ? <span className="badge">{count}</span> : null} </div> ) } // When count = 0, renders: <div></div> // When count = 5, renders: <div><span class="badge">5</span></div> ```