Streamline exposure-band editing

[Today20092]

Parent

• Redesign the LUT Builder workflow and interface #23

What to build

Make exposure-band creation and row editing easier to scan and operate. Group the editor toolbar by purpose, give each band a persistent visible identity, clarify values and units, and reduce the visual weight of destructive actions while preserving current band semantics.

Acceptance criteria

• Global half-width, color automation, movement increment, and band creation controls are grouped by purpose rather than presented as one undifferentiated row.
• Add band is the clearest action in the editor toolbar; bulk color application remains visually secondary.
• The toolbar wraps or stacks cleanly at narrow widths without clipped controls.
• Every row has a visible Band number or equivalent non-color identity.
• Each row presents its color swatch and hexadecimal value as one understandable control.
• Numeric fields communicate their current unit through their visible label or adjacent text.
• The selected row is visually distinct and remains synchronized with selection from the exposure graph.
• Remove is quiet during routine editing but has an accessible name and clearly destructive invoked state.
• Every editing and row action remains keyboard operable with a visible focus state.
• Band add, edit, reorder, color application, and removal behavior remains covered by the existing editor test seam.
• Existing automated tests and the frontend production build pass.

Blocked by

• Establish the LUT-building workflow hierarchy #24