Feature Request: bulk apply conditional formatting across multiple insights

Feature request

Is your feature request related to a problem?

When a dashboard contains multiple table tiles that share the same underlying data (for example, several tiles showing different slices or subsets of a common query), conditional formatting rules have to be configured on each tile individually. There is currently no way to apply the same rule (such as "highlight cells above a threshold") to more than one tile at once.

For dashboards with many related tiles, configuring the same rules one tile at a time is tedious and error-prone, and makes it hard to keep formatting consistent if a threshold ever needs to change.

Describe the solution you'd like

An option to apply conditional formatting rules to multiple tiles at the same time, so that a single rule can be defined once and applied across the relevant tiles on a dashboard.

Describe alternatives you've considered

Configuring each tile individually, which is the current behavior, becomes unmanageable as the number of tiles grows.

Additional context

It would also be useful if PostHog AI could manage conditional formatting, since it is currently not exposed as a configuration option for the assistant.

Request: https://posthoghelp.zendesk.com/agent/tickets/56519 (moved to PostHog: https://us.posthog.com/project/2/support/tickets/57723)

Debug info

No files, tests, or entry points are named. Start by locating dashboard table-tile conditional-formatting configuration and the PostHog AI configuration mentioned in the request; define how one rule targets selected tiles before implementation. Done means a rule can be configured once and applied consistently across multiple relevant tiles.