Usage Analytics Dashboard

The new /dashboard/usage page gives a full picture of your compilation activity: monthly totals, engine breakdowns, success vs. error rates, and average compile times. The X-Compile-Duration-Ms response header is now included on every compile response.

• NewNew /dashboard/usage page with monthly compilation breakdown
• NewEngine-by-engine percentage bars (pdflatex / xelatex / lualatex / latexmk)
• NewX-Compile-Duration-Ms header on every /compile response
• NewPlan limit progress bar with hard-block and soft-block states
• ImprovedAPI key page now shows last_used_at timestamp per key
• FixFixed usage period reset not aligning with billing cycle on plan upgrade