Restore Picture Tol/Blend/Meta panel chrome to capture scale

[baseGame]

Summary

• Restore Picture Compare in-view Tol / Blend / Meta panels: headers ~20px, titles 12px, panel padding 4px 6px, borders #a0a0a0.
• Keep number/select/button controls at capture ~18px (not crushed); blend range 18px; meta cells 2px 6px / 18px min-height.
• Mark data-picture-panel-density="capture-1to1"; Lucide panel icons 14px.

Test plan

• Vitest pictureChromeDensity, PictureCompareView.test.ts, full src/styles/
• Pre-commit quality (prettier, eslint, stylelint, vue-tsc, rust fmt/clippy)
• Spot-check vs docs/assets/.../picture-compare.png (open Tol/Blend/Meta)

Remaining divergences

• Capture screenshot does not show open Tol/Blend/Meta panels — metrics inferred from session chrome scale (DPR≈2) + control heights.
• Range/ignore color deep layout may still differ from native option sheets.
• Options dialog deep content and Media scrub rows intentionally out of scope.