fix(cc-config): read the live account's quota from the CLI, and ask for every account at once

The quota check failed with `invalid_grant` for the account the user was
logged into - the one profile they would try first. An OAuth refresh token is
single use, so every refresh Claude Code performs on its own account retires
the copy sitting in that account's saved profile: the stored credentials of
the LIVE account are the one set guaranteed to be rejected, however recently
the profile was saved. Confirmed on a real install - the saved profile held a
refresh token three rotations behind `.credentials.json`.

`cc-profiles.liveCredentialsFor` now matches a profile's accountUuid against
the live credentials and, on a hit, the usage call uses what the CLI is
holding. That token is never refreshed and that file is never written:
rotating it would log the user out of their own terminal. An expired live
token answers ELIVEEXPIRED - using Claude Code once makes the CLI refresh it -
and a genuinely spent refresh token is now reported as ESTALE with what to do
about it, instead of echoing Anthropic's raw 400.

Opening the Profiles modal also asks for every saved account at once, rather
than one button per row: comparing accounts is the only reason the panel
exists. The guard against rewriting credentials over and over is no longer
"one row at a time" but the rules above - the live account costs a plain read,
and any other profile refreshes only once its token has actually expired,
which then leaves it valid for hours of further opens. Each row resolves on
its own, so a superseded account still lets its neighbours report.

docs/API.md

@@ -1700,7 +1700,11 @@ Profiles live one JSON file per profile under `<CLAUDE_HOME>/agenthub-profiles/`
 
 **`POST /profiles/usage` (how much quota this account has spent).** Answers `{ name, refreshed, fiveHour, sevenDay, checkedAt }`, where each window is `{ utilization, resetsAt }` — a percentage and a rollover time, nothing else. There is no local source for this: nothing under `CLAUDE_HOME` records a utilization, and the credentials file carries only `subscriptionType` and `rateLimitTier`, so the server asks the same endpoint the CLI's own `/usage` reads (`GET https://api.anthropic.com/api/oauth/usage`) with that profile's OAuth token.
 
-It is a **POST**, and behind the same-origin guard, because answering it is a write. A saved profile's access token lasts hours, so every profile that is not the active one is normally expired; reading its usage means refreshing it first, and the refresh **rotates the stored credentials** — Anthropic retires the refresh token it was handed. The new pair is therefore written straight back into the profile file (atomic temp + rename at `0600`, every other field preserved), because a refresh whose result is dropped leaves an account that can never be activated again without a fresh `claude auth login`. A token that is still valid is used as-is and nothing is rewritten; a token that looks valid but is refused (401) is retried once through the refresh path. **Nothing calls this on a timer** — it is one profile per user request, which is what keeps credential rewrites down to the moments the user asked for. Errors: `ENOTFOUND` (404), `ENOREFRESH`/`ENOAUTH` (409 — the profile has no usable token, re-save it from a login), `EUNAUTHORIZED` (401), anything upstream 502. See `server/lib/cc-usage.js`.
+It is a **POST**, and behind the same-origin guard, because answering it is a write. A saved profile's access token lasts hours, so every profile that is not the active one is normally expired; reading its usage means refreshing it first, and the refresh **rotates the stored credentials** — Anthropic retires the refresh token it was handed. The new pair is therefore written straight back into the profile file (atomic temp + rename at `0600`, every other field preserved), because a refresh whose result is dropped leaves an account that can never be activated again without a fresh `claude auth login`. A token that is still valid is used as-is and nothing is rewritten; a token that looks valid but is refused (401) is retried once through the refresh path.
+
+**The account that is logged in right now is the exception, and it is read from the CLI.** A refresh token is single use, so every refresh Claude Code performs on its own account retires the copy sitting in that account's profile file — the saved credentials of the LIVE account are the one set guaranteed to be rejected, with `invalid_grant`, however recently the profile was saved. `cc-profiles.liveCredentialsFor` therefore matches the profile's `accountUuid` against `.credentials.json` and, on a hit, uses what the CLI is holding. That token is never refreshed and that file is never written: rotating it would log the user out of their own terminal. An expired live token answers `ELIVEEXPIRED` (409) — using Claude Code once makes the CLI refresh it.
+
+**Nothing calls this on a timer**, but opening the Profiles modal does ask for every saved account at once — comparing accounts is the only reason the panel exists, and a button per row made the user do that by hand. What keeps that affordable is the pair of rules above: the live account costs a plain read, and any other profile is refreshed only when its token has actually expired, which leaves it valid for hours of further opens. Each row resolves on its own, so one superseded account still lets its neighbours report. Errors: `ENOTFOUND` (404), `ENOREFRESH`/`ENOAUTH` (409 — the profile has no usable token, re-save it from a login), `ESTALE` (409 — the refresh token was already spent by a newer login or refresh; activate the account once and save the profile again), `ELIVEEXPIRED` (409), `EUNAUTHORIZED` (401), anything upstream 502. See `server/lib/cc-usage.js`.
 
 A profile has two names, and the split is what lets a profile be called `Tài khoản chính`. `name` is the internal identifier every mutation route takes, and it is the filename, so it must match `^[a-zA-Z0-9][a-zA-Z0-9._-]{0,39}$`; callers normally never choose it, because `POST /profiles` derives it from the account. `label` is the display name the user edits with `PATCH /profiles`: free-form 1-60 characters, spaces and diacritics allowed since it is never used as a path, stored trimmed, rejected for control characters (`EBADLABEL`), and unique across profiles case-insensitively (`ELABELTAKEN`). A rename rewrites the label in place and **does not move `name`**, so it cannot half-fail and leave a profile unreachable. Profiles written before labels existed report `label` equal to their `name`.