Finish and verify the production LUT Builder interface

[Today20092]

Parent

• Redesign the LUT Builder workflow and interface #23

What to build

Complete the production interface by integrating encoded-signal warnings and final generation feedback into the redesigned workflow, then verify the entire application against the parent specification across responsive, keyboard, contrast, and regression requirements.

Acceptance criteria

• Encoded-signal warning options are clearly grouped, their purpose remains understandable, and inactive advanced details are hidden or visually de-emphasized where practical.
• Warning controls and indicator colors remain fully labeled and keyboard operable.
• Generation, import, export, preview validation, success, and failure states use consistent feedback near the action that produced them.
• Text, ticks, labels, fields, and muted descriptions maintain practical readability and contrast in the dark interface.
• Interactive targets and focus indicators remain visible and usable throughout the page.
• Color is not the sole means of identifying a band, warning, selection, error, or status.
• A keyboard-only walkthrough succeeds for configuration, graph editing, band actions, warning controls, import/export, and LUT generation.
• Manual visual verification succeeds at desktop and narrow viewport widths with no clipped controls or horizontal page scrolling.
• Existing editor, graph, web integration, and backend tests pass.
• Frontend type checking and the production build pass.
• Generated LUT behavior and API contracts remain unchanged.
• Every acceptance criterion in parent specification Redesign the LUT Builder workflow and interface #23 is checked against the integrated result.
• After Establish the LUT-building workflow hierarchy #24, Improve exposure-graph feedback #25, and Streamline exposure-band editing #26 are closed and all parent acceptance criteria pass, close Redesign the LUT Builder workflow and interface #23 with a comment linking the completed implementation and verification results.

Blocked by

• Improve exposure-graph feedback #25
• Streamline exposure-band editing #26