Enhancement: Extension name tooltips for tool banners

[LordMelkor]

Add Extension Name Tooltips to Tool Banners

⚠️ DEPENDENCY: This PR depends on #3231 being merged first. Please review and merge #3231 before this PR.

Overview

Adds hover tooltips to tool banners showing extension names (e.g., "developer extension") without cluttering the UI. This builds on the clean tool descriptions from #3231 by providing extension information on demand through tooltips.

Features

• Extension Name Tooltips: Hover over tool descriptions to see which extension provides that tool
• Left-Aligned Positioning: Tooltips align with text start for natural reading flow
• Smart Detection: Extracts extension names from tool patterns (developer__shell → "developer extension")
• Graceful Fallback: Tools without __ separator show no tooltip

Screenshot

Implementation

• Modified ui/desktop/src/components/ToolCallWithResponse.tsx
• Added getExtensionTooltip() helper function
• Uses existing TooltipWrapper component with align="start"
• Zero performance impact, fully backward compatible

Testing

• ✅ TypeScript compilation passes
• ✅ ESLint checks pass
• ✅ All existing functionality preserved
• ✅ Accessibility maintained

---

Provides extension information on demand while maintaining a clean interface.

[jamadeo]

nit: unnecessary backtick quotes

[jamadeo]

You could avoid duplication by extracting the inner part like:

const toolLabel = (
      <span className="ml-[10px]">
        {(() => {
          const description = getToolDescription();
          if (description) {
            return description;
          }
          // Fallback tool name formatting
          return snakeToTitleCase(toolCall.name.substring(toolCall.name.lastIndexOf('__') + 2));
        })()}
      </span>
);


return (
    <ToolCallExpandable
        ...
        {extensionTooltip ? (
            <TooltipWrapper ... >{toolLabel}</TooltipWrapper>
        ) : (
            {toolLabel}
        )
...

[LordMelkor]

@jamadeo have addressed this in the latest version of the code! Please take a look.

[jamadeo]

Looks great! Thanks for doing this.