fix(chat): make agent message bubbles fit content width

[graycyrus]

Summary

• Agent (left) chat bubbles had w-full which stretched them to 100% width regardless of content
• Changed to w-fit max-w-[75%] so they size to their content, matching user (right) bubble behavior
• Applied to both rendered messages and streaming preview

Test plan

• Open a conversation with short agent messages — bubbles should shrink to fit content
• Send long messages — bubbles should cap at 75% width
• Verify streaming preview also sizes correctly

Summary by CodeRabbit

• Bug Fixes
  • Improved layout consistency for agent and assistant messages in conversations by standardizing container widths and removing responsive breakpoint variations.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1a8b248e-2cbc-47d2-b9ac-a4215ada6683

📥 Commits

Reviewing files that changed from the base of the PR and between aff08d0 and 1305ddd.

📒 Files selected for processing (1)

• app/src/pages/Conversations.tsx

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📝 Walkthrough

Walkthrough

Layout styling adjustment in the Conversations page replaces responsive width containers (w-full md:max-w-[75%]) with consistent fixed-width containers (w-fit max-w-[75%]) for agent message bubbles and streaming assistant content preview, eliminating breakpoint-specific behavior.

Changes

Cohort / File(s)	Summary
Message Layout Styling app/src/pages/Conversations.tsx	Updated width constraints for non-user message containers from responsive (w-full md:max-w-[75%]) to consistent (w-fit max-w-[75%]) styling in agent message and streaming assistant content wrappers.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A hop and a skip, the widths align,
No more breakpoints breaking the line,
Consistent containers, a cleaner view,
The messages now fit just right for you! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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