P2-2/P2-4/P2-5 from review:
- validateLinkedAccount/revalidateLinkedAccount now check
monitorAccountQuotaCapability after the platform match, blocking combos
that would permanently error at runtime: deepseek coding and
custom-domain kimi coding (no quota endpoint), zhipu payg (no balance
endpoint), anthropic/openai API-Key accounts (usage query requires
oauth; anthropic setup-token still allowed via local estimation).
gemini/grok/antigravity stay permissive. Quota mode surfaces
CHANNEL_MONITOR_ACCOUNT_NOT_SUPPORTABLE on edit; probe mode silently
unbinds (same as platform mismatch).
- applyMonitorUpdate re-runs validateCheckMode on the effective
provider+check_mode whenever either field is patched, so a
provider-only update can no longer persist antigravity+probe (the
check is conditioned on provider/check_mode presence so legacy illegal
rows can still be renamed/disabled).
- normalizeMonitorPrimaryModel only substitutes the "quota" placeholder
for pure quota mode; quota_probe with an empty model now fails with
MissingPrimaryModel instead of probing model="quota". The quota branch
also moves ahead of the grok default, so grok+quota now gets "quota"
rather than "grok-4.5" (review L-item).
Tests: capability matrix (15 cases incl. anti-over-blocking rows),
linked-account wiring, revalidate quota/probe split, provider-only
update bypass + legacy-row rename, quota_probe missing-model create,
normalize matrix.
刘佳林