Show CLIProxyAPI hub limits for Claude instances that route through the hub

[EhsanulHaqueSiam]

Problem. With a CLIProxyAPI hub (the setup in the hub guide: https://gist.github.com/t3dotgg/59a521d2ee8d70aaf90e280c175072af), every Claude request goes through the hub, and the claude CLI reports no plan limits through a proxy. So the thread details card's Limits row always says "Unavailable" for those instances. The hub's own usage source (Settings > Providers > Usage providers) has the 5h and weekly numbers, and /usage-limits lists them, but the card reads only the instance's own limits (ThreadDetailsUsage.tsx:54-58).

Proposal. When a Claude instance's effective ANTHROPIC_BASE_URL matches a configured hub source's URL, the card shows that hub's limits. The hub rotates requests across its accounts, so the pooled view (what UsageLimitsPooled already computes) is the meaningful number, not a single account. #26937 makes the probe read the base URL from Claude's settings files, which this matching needs.

Questions for maintainers

• Match on URL automatically, or add an explicit per-instance "limits from this hub" choice?
• Show the pooled total, or the account the hub is most likely to use next?

[juliusmarminge]

Closing as a duplicate of #27235, which tracks the same request. Please follow along there.