Dashboard Redesign & Redis Caching

What’s New

• Added Redis caching layer for auth and API key database lookups
• Added POST /tools/upscale image upscaler endpoint with R2 storage
• Redesigned /apps, /apps/endpoints, /apps/keys, and /apps/settings pages

Improvements

• Replaced brutalist UI with clean editorial single-column layout
• Modularized endpoint playground into focused sub-components and custom hooks
• Removed auth boolean from endpoints (all endpoints use API key auth)
• Sidebar and navbar simplified with flat styling and ghost buttons
• Settings page uses scrollable top-aligned tab navigation

Fixes

• Fixed Radix UI hydration mismatch in sidebar dropdown trigger
• Fixed stale profile cache on login by clearing React Query on auth events
• Fixed 500 error from Date serialization in Redis-cached user profiles