feat: two more finding kinds — single-provider coding, underpayment

The review now cuts by procedure and by provider, and checks paid vs allowed
for short-payments. The Run review page lists the checks and the thresholds
that apply to each.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/api/config.ts

@@ -199,6 +199,8 @@ export const FINDING_KIND: Record<string, string> = {
   payer_policy: 'Payer rule change',
   front_desk: 'Front-desk / registration',
   coding: 'Coding',
+  provider_coding: 'Single provider — coding',
+  underpayment: 'Underpayment',
   documentation: 'Documentation',
   medical_necessity: 'Medical necessity',
   timely_filing: 'Timely filing',

src/screens/RunReviewScreen.tsx

@@ -64,12 +64,14 @@ export function RunReviewScreen() {
             <p className="font-semibold text-ink">Checks performed</p>
             <ul className="mt-1.5 list-disc space-y-0.5 pl-4">
               <li>Claims data reconciled against the finance monthly summary</li>
-              <li>Denial rate vs 8-week baseline: by payer, reason code, department, front desk, week</li>
+              <li>Denial rate vs 8-week baseline: by payer, reason code, department, front desk, week, procedure, provider</li>
               <li>Unfiled appeals with deadlines within 14 days</li>
+              <li>Underpayments: paid vs allowed by payer and procedure, vs baseline</li>
             </ul>
             <p className="mt-2 text-xs text-faint">
-              Materiality threshold: denied count up more than 40% on at least 25 claims, or more
-              than $100K in appeals expiring. Items below the threshold are listed, not flagged.
+              Materiality threshold: denied count up more than 40% on at least 25 claims; more than
+              $100K in appeals expiring; or paid/allowed down more than 10 points or a $50K shortfall.
+              Items below the threshold are listed, not flagged.
             </p>
             <p className="mt-2 inline-flex items-center gap-1.5 text-xs text-faint">
               <Database className="h-3.5 w-3.5" />