Summary

Fix color variable edits via hex input not persisting after save/reload. Extract shared color commit logic into a helper to reduce duplication.

Changes

• Route hex input changes through varEditState when editing/creating a color variable, matching the behavior of the saturation wheel
• Extract commitColorValue helper to DRY up the 3-way dispatch (edit variable / create variable / direct onChange)
• Merge duplicate blur branches (exact 6 digits and >6 digits) into one
• Replace arbitrary Tailwind classes with standard equivalents (min-w-30, -outline-offset-1)

Test plan

• Edit a color variable using the hex input field — verify the value persists after save/reload
• Create a new color variable using the hex input — verify it saves correctly
• Edit a color variable using the ration wheel — verify it still works
• Type partial hex values and blur — verify it resets gracefully