Fix Medical Seer billing when chart context is missing

[cursor]

What changed

• Medical Astrology Ask the Seer no longer bills a PAYG tool_seer credit when the user has no medical chart yet.
• enforceToolSeerGate can now reject missing chart/reading context before rate-limit and consumeBillingAction.
• The Medical Seer route passes that missing-chart 400 through the gate, matching the Vedic/Western (Fix Seer billing when natal chart context is missing #64) and Hellenistic (Fix Hellenistic Seer billing when chart context is missing #65) pattern.

Why this change is safe

• Root cause: MedicalSeerChat is always rendered on /tools/medical-astrology (Ask the Seer tab). Starter questions fire with analysis: null. The gate billed, then the route 400'd with "Generate your medical astrology analysis first."
• Trigger: Authenticated PAYG user opens Medical Astrology → Ask the Seer before a report exists → clicks a starter chip (e.g. "What health tendencies does my chart show?").
• Scope is focused: gate option + Medical Seer route. Does not change Vedic/Western (Fix Seer billing when natal chart context is missing #64) or Hellenistic (Fix Hellenistic Seer billing when chart context is missing #65) routes.
• Valid questions with a chart still debit (locked by test).

Verification

• ESLint on touched files
• pnpm test — 70 suites / 386 tests
• pnpm run lint:security passed
• Playwright smoke (not required: no UI/routing change; billing is API-only)

Pre-existing pnpm run security high browserslist advisories are unchanged.

Regression prevention

• tests/unit/medicalSeerMissingChart.test.ts: missing analysis → 400 and consumeBillingAction not called; valid chart still bills.
• tests/unit/enforceToolSeerGate.test.ts: missingContextError returns 400 before debit.

Release checklist (solo-friendly)

• CI is green after this PR
• Complementary to open Fix Seer billing for empty questions #59 (empty questions), Fix Seer billing when natal chart context is missing #64 (Vedic/Western missing natal chart), Fix Hellenistic Seer billing when chart context is missing #65 (Hellenistic missing chart) — do not fold together.

Not in this PR: LLM/stream failure after a valid question with chart still debits with no refund helper.

  

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Project	Deployment	Actions	Updated
future-seer	Error		Sep 2, 2026 11:14am UTC