fix the issue with logs and table visualzation in dashboards

[kcrandall]

There was an issue where you couldnt have the logs or table visualation in dashboards because it would always return the graph format.

I've added a selector to select the type of dataframe you want to return (log/graph).

[Copilot]

Pull Request Overview

This PR introduces a displayMode option to allow dashboards to switch between log/table and graph visualizations.

• Add displayMode to the query type and default settings
• Update data source caching and response flows to branch on displayMode
• Extend the query editor UI with a selector for displayMode

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/types.ts	Added displayMode to MyQuery and default query
src/features/log/queryResponseBuilder.ts	Extracted isTimeField helper, updated graph logic
src/datasource.ts	Enhanced cache key and response logic for modes
src/components/QueryEditor.tsx	Added UI selector and propagate displayMode

Comments suppressed due to low confidence (2)

src/datasource.ts:62

• Consider adding unit tests for the displayMode branching in the caching and response logic to ensure both 'logs' and 'graph' modes are handled correctly.

        displayMode: target.displayMode ?? 'auto',

src/components/QueryEditor.tsx:79

• This call to onChange replaces the entire query object, dropping other fields like refId or query. Spread the existing query when updating: onChange({ ...query, stream: ..., organization: ..., sqlMode: ..., displayMode: ... });

                displayMode: query.displayMode ?? 'auto'