fix(labs): strict numeric parsing, atomic confirm guard, test integrity

- normalize.ts num(): parseFloat truncated at the first comma, so "1,200"
  silently became 1 (1000x error) and "5,5" became 5. Now strictly matches
  either US thousands-grouping or a plain number spanning the whole string;
  anything else (incl. ambiguous "5,5") returns null instead of a wrong value.
- labs.ts confirm handler: the pending-status check ran before the request
  body was read, so two concurrent confirms could both pass it and
  double-insert. Added a guarded UPDATE ... WHERE status = 'pending' as the
  first statement inside the existing synchronous transaction; zero rows
  affected throws and the route returns 409, with the fast-path check kept
  for the common case.
- Added missing `await` on two rejects.toThrow assertions (llm.test.ts,
  extract.test.ts) that were previously resolving before the assertion
  settled.
- Bumped the 11th-failed-login rate-limit test to a 30s timeout — 10
  sequential argon2id verifies can exceed bun:test's 5s default under load.

server/src/lib/normalize.ts

@@ -24,9 +24,27 @@ export interface NormMarker {
   canonicalUnit: string | null;
 }
 
+const THOUSANDS_GROUPED = /^\d{1,3}(,\d{3})+(\.\d+)?$/;
+const PLAIN_NUMBER = /^-?\d+(\.\d+)?$/;
+
+// Strict numeric parsing: parseFloat alone stops at the first non-numeric
+// character, so "1,200" silently became 1 (a 1000x error) and "5,5" (a
+// European decimal) silently became 5. Instead: strip comparators/whitespace,
+// then only accept (a) US thousands-grouping, comma-stripped, or (b) a plain
+// number that spans the ENTIRE remaining string. Anything else — including
+// ambiguous "5,5" — returns null so no canonical value is computed rather
+// than a silently wrong one.
 const num = (v: string): number | null => {
-  const n = parseFloat(v.replace(/[<>≤≥]/g, "").trim());
-  return Number.isFinite(n) ? n : null;
+  const stripped = v.replace(/[<>≤≥\s]/g, "");
+  if (THOUSANDS_GROUPED.test(stripped)) {
+    const n = parseFloat(stripped.replace(/,/g, ""));
+    return Number.isFinite(n) ? n : null;
+  }
+  if (PLAIN_NUMBER.test(stripped)) {
+    const n = parseFloat(stripped);
+    return Number.isFinite(n) ? n : null;
+  }
+  return null;
 };
 
 export function normalizeMarker(raw: RawMarker): NormMarker {

server/src/routes/labs.ts

@@ -1,4 +1,5 @@
-import { desc, eq } from "drizzle-orm";
+import type { Changes } from "bun:sqlite";
+import { and, desc, eq } from "drizzle-orm";
 import { Hono } from "hono";
 import { randomUUID } from "node:crypto";
 import { existsSync, mkdirSync } from "node:fs";
@@ -88,20 +89,39 @@ export function labsRoutes(deps: LabsDeps) {
       panel: m.panel, name: m.name, value: m.value, unit: m.unit,
       referenceRange: m.referenceRange, flagged: m.flagged,
     }));
-    deps.db.transaction((tx) => {
-      tx.insert(labDraws).values({
-        id: drawId, collectedAt: body.data.collectedDate, labName: body.data.labName,
-        draftId: row.id, createdAt: Date.now(),
-      }).run();
-      for (const n of norm) {
-        tx.insert(biomarkers).values({
-          drawId, panel: n.panel, name: n.name, marker: n.marker, analyteKey: n.analyteKey,
-          value: n.value, valueNum: n.valueNum, unit: n.unit, referenceRange: n.referenceRange,
-          flagged: n.flagged ? 1 : 0, valueCanonical: n.valueCanonical, canonicalUnit: n.canonicalUnit,
+    try {
+      deps.db.transaction((tx) => {
+        // Guarded status transition (pending -> confirmed) inside the same
+        // synchronous transaction as the inserts below, so two concurrent
+        // confirms of the same draft can't both pass the earlier status
+        // check (before the request body was even read) and double-insert.
+        // Only the request that actually flips the row gets to write rows.
+        // drizzle-orm's bun-sqlite types pin TRunResult to `void`, but at
+        // runtime bun:sqlite's Statement.run() actually returns a
+        // `{ changes, lastInsertRowid }` Changes object — confirmed in
+        // node_modules/bun-types/sqlite.d.ts. Cast to the real runtime type.
+        const updated = tx.update(labDrafts).set({ status: "confirmed" })
+          .where(and(eq(labDrafts.id, row.id), eq(labDrafts.status, "pending"))).run() as unknown as Changes;
+        if (updated.changes === 0) throw new Error("draft_not_pending");
+
+        tx.insert(labDraws).values({
+          id: drawId, collectedAt: body.data.collectedDate, labName: body.data.labName,
+          draftId: row.id, createdAt: Date.now(),
         }).run();
+        for (const n of norm) {
+          tx.insert(biomarkers).values({
+            drawId, panel: n.panel, name: n.name, marker: n.marker, analyteKey: n.analyteKey,
+            value: n.value, valueNum: n.valueNum, unit: n.unit, referenceRange: n.referenceRange,
+            flagged: n.flagged ? 1 : 0, valueCanonical: n.valueCanonical, canonicalUnit: n.canonicalUnit,
+          }).run();
+        }
+      });
+    } catch (e) {
+      if (e instanceof Error && e.message === "draft_not_pending") {
+        return c.json({ error: "draft is not pending" }, 409);
       }
-      tx.update(labDrafts).set({ status: "confirmed" }).where(eq(labDrafts.id, row.id)).run();
-    });
+      throw e;
+    }
     return c.json({ drawId }, 201);
   });