feat: ui

.agent/controllers/keystone-seam-audit/standards.md

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+# Standards
+
+- Prefer cohesive modules with a single clear responsibility over line-count-only splitting.
+- Preserve behavior first; do not mix feature work with the refactor.
+- Avoid one-off abstractions. New modules must reflect real ownership boundaries that the codebase can keep using.
+- Keep public interfaces stable unless a minimal coordinated update is required.
+- Exclude generated, vendored, compiled, snapshot, fixture, and lock files from refactor targets unless explicitly treated as source by the repo.
+- Before editing, check for existing local changes in candidate files and avoid overwriting user work.
+- Refactor in small, reviewable increments so each target can be validated independently.
+- Run the smallest relevant test or lint command after each target, then run the broadest available final validation before finishing.
+- If no automated tests exist for a risky seam, add or strengthen focused tests before or during the refactor when practical.
+- Keep names, module placement, and imports maintainable and consistent with existing repo conventions.
+- Remove dead helpers, obsolete re-exports, and temporary scaffolding introduced during the split.
+- Leave tests green.