feat: show Account Pooler accounts in usage limits

[MayankBansal12]

Usage limits now include every Claude and Codex account configured in BB’s Account Pooler, including accounts absent from machine-local logins. The optional, read-only integration uses non-secret account.list summaries and preserves the last successful pool snapshot when a read fails or times out.

• Show pool labels, quota windows, reset times, and account status. Pool accounts remain visible under every machine filter; disabled accounts and accounts without reported limits remain visible, and API key accounts explain that subscription limits are unavailable.
• Combine a local subscription only when provider and normalized email identify one pooled account. Preserve windows from both sources, prefer the newer reset cycle and higher usage within a cycle, and normalize matching local window labels so stale or missing pool data cannot hide usable local quotas.
• Mask emails using one asterisk per hidden character while keeping the first and last username characters and domain visible (for example, jonathan@gmail.com becomes j******n@gmail.com) in labels, tooltips, diagnostics, and accessibility text. Place Account Pooler and machine badges together and align card rows and quota bars across columns.
• Bump the package and lockfile to 0.3.10. Token and cost attribution is unchanged.

Validation: npm run check, all 221 tests, and bb plugin build pass. Regression coverage includes matching-email pool failures, empty and partial observations, reset-cycle selection, native window labels, and email masking. Verified the live quota RPC, desktop alignment, and the 390px mobile layout with no horizontal overflow or full emails in quota-card text or attributes. Reloaded the plugin from the local development checkout for manual testing.

AGENT GENERATED