Add precise crop controls with numeric inputs and drag-to-move

[Hemkesh]

Summary

• Numeric crop inputs: Added X, Y, Width, Height pixel input fields in the crop modal so users can type exact values for consistent crop positioning across videos
• Aspect ratio presets: Dropdown with common ratios (16:9, 9:16, 4:3, 3:4, 1:1, 21:9) plus a lock/unlock button to maintain ratio while resizing
• Drag-to-move crop area: Click and drag inside the crop region to pan it around (previously only edge resizing was possible)
• Dark mode fix: Fixed dropdown styling so text is readable on dark backgrounds

Test plan

• Open the crop modal and verify X/Y/W/H inputs reflect the current crop in pixels
• Type values into the inputs and confirm the visual crop updates accordingly
• Select an aspect ratio preset and verify the crop adjusts to match
• Lock the aspect ratio and resize W or H — the other dimension should adjust proportionally
• Click and drag inside the crop area to move it around
• Verify edge handles still work for resizing
• Check the ratio dropdown is readable in dark mode

🤖 Generated with Claude Code

[siddharthvaddem]

This is actually helpful and neat!