fix(labs): surface truncation hint, drop dead code, document module gate

Add a 'showing latest N of M' hint to the lab list and biomarker detail
when the 500-row cap truncates. Drop the inaccurate amend comment from the
edit history, justify the inline-SVG vs Recharts sparkline split, remove
the unused BiomarkerPanelKey export, and document the deliberate UX-only
(non-server) module gate on the labs + biomarkers routes. New labs i18n
keys added across all six locales.

messages/de.json

@@ -6716,7 +6716,9 @@
         "electrolytes": "Elektrolyte",
         "bloodCount": "Blutbild"
       }
-    }
+    },
+    "noteLoadFailed": "Notiz konnte nicht geladen werden; sie bleibt beim Speichern unverändert.",
+    "showingLatestOf": "Die neuesten {shown} von {total} Messwerten werden angezeigt"
   },
   "modules": {
     "cycle": {

messages/en.json

@@ -6716,7 +6716,9 @@
         "electrolytes": "Electrolytes",
         "bloodCount": "Blood count"
       }
-    }
+    },
+    "noteLoadFailed": "Note could not be loaded; it will be kept unchanged when you save.",
+    "showingLatestOf": "Showing the latest {shown} of {total} readings"
   },
   "modules": {
     "cycle": {

messages/es.json

@@ -6716,7 +6716,9 @@
         "electrolytes": "Electrolitos",
         "bloodCount": "Hemograma"
       }
-    }
+    },
+    "noteLoadFailed": "No se pudo cargar la nota; se mantendrá sin cambios al guardar.",
+    "showingLatestOf": "Mostrando los {shown} resultados más recientes de {total}"
   },
   "modules": {
     "cycle": {

messages/fr.json

@@ -6716,7 +6716,9 @@
         "electrolytes": "Électrolytes",
         "bloodCount": "Numération sanguine"
       }
-    }
+    },
+    "noteLoadFailed": "La note n’a pas pu être chargée ; elle restera inchangée à l’enregistrement.",
+    "showingLatestOf": "Affichage des {shown} derniers résultats sur {total}"
   },
   "modules": {
     "cycle": {

messages/it.json

@@ -6716,7 +6716,9 @@
         "electrolytes": "Elettroliti",
         "bloodCount": "Emocromo"
       }
-    }
+    },
+    "noteLoadFailed": "Impossibile caricare la nota; resterà invariata al salvataggio.",
+    "showingLatestOf": "Visualizzazione degli ultimi {shown} risultati su {total}"
   },
   "modules": {
     "cycle": {

messages/pl.json

@@ -6716,7 +6716,9 @@
         "electrolytes": "Elektrolity",
         "bloodCount": "Morfologia krwi"
       }
-    }
+    },
+    "noteLoadFailed": "Nie udało się wczytać notatki; pozostanie niezmieniona po zapisaniu.",
+    "showingLatestOf": "Wyświetlanie najnowszych {shown} z {total} wyników"
   },
   "modules": {
     "cycle": {

src/components/labs/lab-list.tsx

@@ -101,6 +101,13 @@ export function LabList({ onAddFirst }: { onAddFirst?: () => void } = {}) {
     [data?.results],
   );
 
+  // The list caps at 500 rows server-side (the `limit` ceiling). Surface a
+  // calm "showing latest N of M" hint when the cap truncates so the count is
+  // never silently wrong — proper cursor paging is a later iteration.
+  const total = data?.meta?.total ?? 0;
+  const shown = data?.results?.length ?? 0;
+  const truncated = total > shown;
+
   if (isLoading) {
     return (
       <div className="space-y-3" data-slot="lab-list-loading">
@@ -144,6 +151,11 @@ export function LabList({ onAddFirst }: { onAddFirst?: () => void } = {}) {
 
   return (
     <div className="space-y-3">
+      {truncated ? (
+        <p className="text-muted-foreground text-xs">
+          {t("labs.showingLatestOf", { shown, total })}
+        </p>
+      ) : null}
       {groups.map((group) => {
         const body = (
           <>

src/components/labs/lab-trend-sparkline.tsx

@@ -3,12 +3,19 @@
 /**
  * v1.17.1 — minimal inline trend sparkline for an analyte's readings.
  *
- * A dependency-free SVG polyline (the project defers Recharts for tiny
- * inline trends; this matches the doctor-report PDF's vector-polyline
- * approach). Rendered only when an analyte has ≥ 2 readings. Stroke uses
- * the neutral `currentColor` so it inherits the calm muted-foreground tone
- * of its row — no status colour, in keeping with the no-alarming-colour
- * ethos.
+ * A dependency-free 72×20 SVG polyline. This is DELIBERATELY a different
+ * implementation from the detail page's Recharts `<LabBiomarkerChart>`: a
+ * list row renders one tiny, axis-less, tooltip-less, interaction-less trend
+ * per group (dozens on screen at once), where mounting a Recharts
+ * `ResponsiveContainer` each would be heavy and visually noisy. The full
+ * interactive chart — axes, reference band, range tabs, rich tooltip — lives
+ * only on the single-biomarker detail surface. The same split (inline
+ * polyline vs Recharts) is used by the doctor-report PDF. The two are not
+ * drift; do not unify them.
+ *
+ * Rendered only when an analyte has ≥ 2 readings. Stroke uses the neutral
+ * `currentColor` so it inherits the calm muted-foreground tone of its row —
+ * no status colour, in keeping with the no-alarming-colour ethos.
  *
  * `values` are passed oldest → newest.
  */

src/lib/labs/biomarker-catalog.ts

@@ -83,5 +83,3 @@ export const BIOMARKER_PANELS = [
   "electrolytes",
   "bloodCount",
 ] as const;
-
-export type BiomarkerPanelKey = (typeof BIOMARKER_PANELS)[number];