Fix PRD acceptance criteria gaps

[Jds-23]

Summary

Several UI details diverge from the PRD acceptance criteria. Fix them.

Tasks

• Autocomplete highlight: Uses unloaded font weight — ensure the bold/highlight font is loaded before rendering
• Numpad overlay opacity: Should be 0.92, currently 0.60 — update overlay background alpha
• Numpad key height: Should be 60px, currently 44px — update key button height
• Header subtitle: Should read "TRACK · LIFT · PROGRESS" — update header text
• Delete button: Visually disable delete workout button during an active session
• Android dropdown elevation: Add proper elevation/shadow to dropdown menus on Android

Acceptance Criteria

• Autocomplete highlight text renders with correct font weight
• Numpad overlay is 0.92 opacity
• Numpad keys are 60px tall
• Header subtitle reads "TRACK · LIFT · PROGRESS"
• Delete button is visually disabled during active session
• Android dropdowns have proper elevation

Priority

P2 — Bug fixes

Phase

Phase 10: Quality & Polish