feat(messages): render attached images with lightbox preview

[lionellc]

Summary

• Render attached images in message bubbles as a horizontal grid.
• Add lightbox preview for image thumbnails with ESC/overlay close.
• Parse user message image inputs into structured image URLs.

Testing

• Added Messages component test for image grid + lightbox.
• Updated thread item parsing test for image URLs.

[Dimillian]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: f6851fce3b

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[lionellc]

My fix is to stop inserting [image] placeholders into the message text and remove the second-pass normalization that collapses whitespace. This preserves original newlines/indentation and avoids flattening Markdown when images are attached.
The trade‑off is that historical messages containing [image] will continue to display that literal text, but that impact is small; directly stripping [image] is unsafe because users may have typed [image] intentionally.

@Dimillian

[Dimillian]

@codex review

[Dimillian]

My fix is to stop inserting [image] placeholders into the message text and remove the second-pass normalization that collapses whitespace. This preserves original newlines/indentation and avoids flattening Markdown when images are attached. The trade‑off is that historical messages containing [image] will continue to display that literal text, but that impact is small; directly stripping [image] is unsafe because users may have typed [image] intentionally.

@Dimillian

Yes it's fine

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. More of your lovely PRs please.

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".