test(canvas): add ChannelsTab + TracesTab coverage — 34 cases #875

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a2117ec8ac test(canvas): add ChannelsTab + TracesTab coverage — 34 cases
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Add vitest unit tests for ChannelsTab (16 cases) and TracesTab (18 cases).
ChannelsTab: SUPPORTS_DETECT_CHATS, loading/empty/error states, channel
list rendering (enabled/disabled), toggle labels, message count, allowed
users, Test/Remove buttons, header and Connect form flow.
TracesTab: loading/empty/error states, trace list, expand/collapse,
aria-expanded attribute, latency formatting (ms/s), token usage, cost
display, Refresh button.
Fix error state assertions in ChannelsTab — component renders generic
"Failed to load connected channels/platforms" not raw error text.
Fix TracesTab cost test — use regex to handle locale variation in
toFixed(6).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-13 18:26:56 +00:00