Smoother help tab with steady layout and easier search

We've made the Help tab a lot easier and more pleasant to use by fixing its layout so the tabs and footer stay anchored at the bottom while the content scrolls smoothly in the middle. This means you can browse the help content without losing sight of navigation or controls.

**Improved search experience**
The search bar no longer loses focus with each keystroke, so typing feels seamless and uninterrupted. We also added a clear button with a familiar “X” icon, making it quick to reset your search and start fresh without extra clicks.

**Visual polish and stability**
We refreshed the footer logo to use the distinctive ‘M’ mark for a cleaner look and ensured that the header, tabs, and footer maintain their size properly without shrinking awkwardly. Altogether, these tweaks deliver a smoother, more stable interface for when you need help or want to find answers quickly.