refactor(rules): split ui-ux.md into index + references

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

shared/rules/ui-ux/references/tables-search-dialogs.md

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+## Tables and Data-Dense Views
+
+* Use tables only for genuinely tabular data.
+* Keep column names concise.
+* Align numeric data consistently.
+* Make sorting and filtering discoverable.
+* Preserve filter and sort state where useful.
+* Do not overload tables with too many actions.
+* Prefer a clear primary row action and secondary contextual actions.
+* Keep important columns visible.
+* Allow horizontal scrolling only when necessary.
+* Use pagination, virtualization or incremental loading for large data sets.
+* Provide clear empty states.
+* Avoid showing unnecessary columns by default.
+* Use sensible formatting for dates, numbers and units.
+
+## Search and Filtering
+
+* Search should behave predictably.
+* Make active filters visible.
+* Make filters easy to remove.
+* Provide a clear way to reset filters.
+* Preserve search and filter state when navigating back where practical.
+* Avoid requiring users to configure many filters before seeing results.
+* Use sensible defaults.
+* Clearly distinguish no results from loading or errors.
+* Suggest recovery options when no results are found.
+
+## Dialogs and Modals
+
+* Use dialogs only when interruption is justified.
+* Avoid stacking dialogs.
+* Keep dialogs focused on one decision or task.
+* Use clear titles.
+* Keep primary and secondary actions obvious.
+* Make cancellation easy.
+* Support Escape where appropriate.
+* Do not use dialogs for information that belongs inline.
+* Avoid large workflows inside modal dialogs.
+* Do not close dialogs unexpectedly while users are entering data.