fix: improve UI scaling when sidebar width is reduced (#2678)

[roomote]

Closes: #2678

This PR addresses UI scaling issues when the primary sidebar width is reduced by implementing several responsive improvements:

Key Changes:

• Settings View: Adjusted compact mode threshold from 500px to 600px for earlier activation when space is constrained
• Mode Selector: Improved text truncation in dropdowns using better Tailwind CSS classes (truncate, min-w-0, max-w-[40%])
• Chat Text Area: Enhanced API configuration dropdown responsiveness with proper flex and overflow handling
• Global CSS: Added responsive utilities for narrow containers, better text overflow handling, and container queries

Implementation Details:

• Used ResizeObserver-based responsive design patterns already established in the codebase
• Applied consistent min-w-0 classes to prevent flex items from overflowing
• Maintained existing VSCode theme integration and styling patterns
• Added CSS utilities that can be reused across other components

Testing:
Manual testing performed across various sidebar widths (300px-600px range) to verify proper responsive behavior and text truncation in all affected UI components.

---

Important

Improves UI scaling for narrow sidebars by adjusting compact mode threshold, enhancing text truncation, and adding responsive CSS utilities.

• Behavior:
  • Adjusted compact mode threshold in SettingsView.tsx from 500px to 600px for earlier activation.
  • Improved text truncation in ModesView.tsx and ApiConfigManager.tsx using Tailwind CSS classes like truncate, min-w-0, and max-w-[40%].
  • Enhanced ChatTextArea.tsx dropdown responsiveness with min-w-0 class.
• CSS:
  • Added responsive utilities in index.css for narrow containers, text overflow handling, and container queries.
  • Ensured checkbox and button elements maintain size and visibility in narrow layouts.
• Testing:
  • Manual testing across sidebar widths (300px-600px) to verify responsive behavior and text truncation.

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[daniel-lxs]

@MuriloFP

It seems like this didn't fix the issue completely

Can you take a look?

[MuriloFP]

@daniel-lxs I've addressed the issues you mentioned. Here's what I fixed:

Checkbox Squeezing Issue

• Added CSS rules to prevent VSCode checkboxes from being squeezed in narrow sidebars
• Applied flex-shrink: 0 and min-width: fit-content to checkbox containers
• Added specific selectors for all settings pages to ensure consistent behavior

Profile Selection Icons Issue

• Fixed the trash icon being completely cut off by adjusting the button layout
• Reduced gap between buttons from gap-1 to gap-0.5 for better space utilization
• Added min-w-[32px] to each icon button to maintain minimum width
• Wrapped the button group in a flex-shrink-0 container to prevent compression

Additional Improvements

• Added responsive CSS utilities for containers under 400px width
• Implemented overflow handling for extreme narrow cases (< 350px)
• Ensured all icon buttons (add, edit, trash) remain visible and clickable

The UI elements should now properly adapt to narrow sidebar widths without being squeezed or cut off. All tests are passing.

[daniel-lxs]

@roomote-agent check my latest review and address the suggestions, commit the changes to this PR, do not create a new one

[roomote]

Hi @daniel-lxs, I see your review comments. I will address the following issues:

1. Remove the duplicate .dropdown-container class definition in webview-ui/src/index.css (line 577)
2. Replace the RTL direction hack in ModesView.tsx with a proper text-align approach for better accessibility

Working on these changes now.

[roomote]

Hi @daniel-lxs, I have successfully addressed both review suggestions:

✅ Fixed duplicate .dropdown-container class - Removed the duplicate definition at line 577 in webview-ui/src/index.css
✅ Replaced RTL direction hack - Updated ModesView.tsx to use textAlign: "right" instead of direction: "rtl" for better accessibility

The changes have been committed to this PR branch (commit bb941c1) and all CI checks are passing. The code is ready for your review!

[daniel-lxs]

Closing since the CSS seems complicated and I can't notice any noticeable improvements, feel free to reopen if someome wants to work on this a bit more.

[elianiva]

Hi @daniel-lxs, I would like to improve on this a bit more (in a separate PR, of course), the dropdown has annoyed me too for a while.
Would be nice if you can give me the green flag to start working on this 🙂