Indicate chat exists on project, workflow or job

[jyeshe]

Description

This PR adds an icon on the workflows and projects lists when the user has a chat in a job that belongs to the workflow or project (directly or indirectly).

It also indicates if the user has started a chat on a specific job, on the Workflow Diagram

Closes #2922

Validation steps

1. Look at the Projects table and see no icon
2. Change exists to not exists on

   lightning/lib/lightning/projects.ex

   Line 125 in d229670

   has_ai_chat: exists(chat_session_exists_query)

3. Look again at the Projects table and the sparkles are there
4. Repeat for Workflows table by changing the exists on this line:
   

   lightning/lib/lightning/workflows.ex

   Line 369 in d229670

   select: %{w | has_ai_chat: exists(chat_session_exists_query)},

5. Finally to check the Jobs on the Workflow Diagram, change the line

   lightning/lib/lightning_web/live/workflow_live/edit.ex

   Line 3086 in d229670

   Map.put(job, "has_ai_chat", has_ai_chat)

Additional notes for the reviewer

1. (Is there anything else the reviewer should know or look out for?)

AI Usage

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• Optimisation / refactoring
• Translation / spellchecking / doc gen
• Other
• I have not used AI

You can read more details in our Responsible AI Policy

Pre-submission checklist

• I have performed a self-review of my code.
• I have implemented and tested all related authorization policies. (e.g., :owner, :admin, :editor, :viewer)
• I have updated the changelog.
• I have ticked a box in "AI usage" in this PR

[codecov]

Codecov Report

Attention: Patch coverage is 94.28571% with 2 lines in your changes missing coverage. Please review.

Project coverage is 89.95%. Comparing base (f069ed2) to head (cc00542).

Files with missing lines	Patch %	Lines
...ib/lightning_web/live/dashboard_live/components.ex	85.71%	1 Missing ⚠️
...ing_web/live/workflow_live/dashboard_components.ex	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3258      +/-   ##
==========================================
- Coverage   89.96%   89.95%   -0.02%     
==========================================
  Files         367      367              
  Lines       14389    14412      +23     
==========================================
+ Hits        12945    12964      +19     
- Misses       1444     1448       +4     

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[elias-ba]

Hey @jyeshe great job, man. I have just one comment on the placement of the sparkles icon in the projects and workflows table. Maybe worth chatting with @taylordowns2000 and @josephjclark for UI ideas.

[stuartc]

We seem to have a regression since I merged in main, the icon no longer renders on the job nodes.

And we want to use a different icon, the sparkles is used elsewhere for different intents.

[stuartc]

Notes:

We need to take a look at how the querying works and the performance implications.

It feels like the query additions (i.e. populating the has_ai_chat field) could be in a better place, and we need to
check what other places will also end up calling them.

Also we need to check the performance implications, and possibly consider a caching layer.