feat: support multimodal chat

[lukasdotcom]

Adds support for multimodal chat.

Needs these prs:

• Add MultimodalChatWithToolsProvider integration_openai#400
• Feat: Add MultimodalChatWithTools and MultimodalContextAgentInteraction server#61963
  You can also now use llm2 instead
• feat: Multimodality llm2#278

For context agent you can use this pr:

• feat: support multimodal chat inputs and outputs context_agent#211

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

[julien-nc]

• It works very well 👍
• The message attachments could be in a horizontal layout, right now they take a lot of space

• When there are multiple attachments, the viewer does not open when clicking one attachment. It works when there is only one attachment.

I'll make code reviews next week.

[lukasdotcom]

• It works very well 👍

  • The message attachments could be in a horizontal layout, right now they take a lot of space

* When there are multiple attachments, the viewer does not open when clicking one attachment. It works when there is only one attachment.

I'll make code reviews next week.

The viewer didn't open for input attachments only output attachments. I've switched it to now work for all of them and also made the attachments work horizontally

[kyteinsky]

multimodal, let's gooo!

a few nits that could be ironed out:

nit: creating a new chat with the attachments selected does not clear them up, not sure if it's intentional (since they are already uploaded so would save that for the new chat) but was something unexpected.
maybe a "Clear All" button for the attachments can act as a middle ground keeping the above behaviour.

nit: maybe the filename could be truncated here, or hidden even and can be seen when hovered

[lukasdotcom]

multimodal, let's gooo!

a few nits that could be ironed out:

nit: creating a new chat with the attachments selected does not clear them up, not sure if it's intentional (since they are already uploaded so would save that for the new chat) but was something unexpected. maybe a "Clear All" button for the attachments can act as a middle ground keeping the above behaviour.

nit: maybe the filename could be truncated here, or hidden even and can be seen when hovered

Took me a bit longer than I wanted to to look at your feedback, but I removed the filename and added it as a title attribute to the image instead. There is also a clear all attachments button now