feat: enhance tool status display and fix undici override

[ebarroca]

Summary

• Add error badge styling for tool calls with error status in ToolCallGroup, so individual tool errors show a red badge instead of the default purple
• Refactor computeGroupDisplayStatus() to only mark a group as error when all tools errored — individual errors are shown on the badge only
• Update mergeToolStatus() priority: error is now lowest so a single tool failure doesn't turn the entire group red
• Remove stale console.log in WorkstreamTabs
• Fix undici override version from ^7.24.1 to ^6.23.0

Test Plan

• Verify tool error badges render red while group status stays normal when only some tools fail
• Verify group turns red when all tools in a group error
• Verify no console.log noise from WorkstreamTabs

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