Commands chart, user search, and loading improvements

Commands chart, user search, and loading improvements

A new update adds the ability to look up any user's profile, track command usage on charts, and improves how pages load.

Added

• User search: A search bar is now available in the top navigation — enter a nickname or Discord user ID and press Enter to open that user's profile
• Commands chart: A new "Commands" tab is available in the chart modal — see how many slash commands a user has used over time, filter by server, channel, or command name
• Commands stat: The profile page now shows total command count alongside messages, voice, and activity stats
• Offline page: If you lose connection and a page isn't cached, you'll now see a proper offline screen instead of a browser error

Improved

• Profile and stats sections now show a loading animation while data is being fetched, instead of displaying placeholder "???" values instantly
• Chart modal shows a loading state while new data is loading