diff --git a/messages/de.json b/messages/de.json
index e633cfc99..6e7ec78e3 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -5148,6 +5148,11 @@
     "withingsFullSyncTitle": "Vollsynchronisierung?",
     "withingsFullSyncDescription": "Alle verfügbaren Withings-Daten werden vollständig synchronisiert. Das kann je nach Historie etwas dauern.",
     "withingsSyncResult": "{count} Messwerte synchronisiert",
+    "syncOutcome": {
+      "empty": "Nichts Neues zu importieren. Alles ist aktuell.",
+      "failed": "Es wurde nichts gespeichert. Der nächste Lauf versucht es erneut.",
+      "partial": "{count} Messwerte synchronisiert. Ein Teil der Daten konnte nicht gespeichert werden; der nächste Lauf versucht es erneut."
+    },
     "withingsFullSyncResult": "{count} Messwerte vollständig synchronisiert",
     "withingsSyncFailed": "Sync fehlgeschlagen",
     "withingsOauthConnected": "Withings verbunden — der erste Sync startet im Hintergrund.",
@@ -7873,6 +7878,9 @@
       "saveSelected": "{count} ausgewählte speichern",
       "discardAll": "Alle verwerfen",
       "savedToast": "{count} Laborwerte gespeichert",
+      "savedPartialToast": "{count} Laborwerte gespeichert, {skipped} als Dubletten übersprungen",
+      "savedNothingToast": "Nichts gespeichert: {skipped} Werte waren bereits erfasst",
+      "savedEmptyToast": "Nichts zu speichern",
       "noRows": "In diesem Befund konnten keine Werte gefunden werden.",
       "nothingToSave": "Wähle mindestens einen Wert zum Speichern aus.",
       "saveFailed": "Werte konnten nicht gespeichert werden. Bitte erneut versuchen.",
diff --git a/messages/en.json b/messages/en.json
index d7183b5c9..2cb2ed52b 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -5148,6 +5148,11 @@
     "withingsFullSyncTitle": "Full synchronization?",
     "withingsFullSyncDescription": "All available Withings data will be fully synchronized. This may take some time depending on your history.",
     "withingsSyncResult": "{count} measurements synchronized",
+    "syncOutcome": {
+      "empty": "Nothing new to import. Everything is up to date.",
+      "failed": "Nothing was saved. The next run retries it.",
+      "partial": "{count} measurements synchronized. Some data could not be saved; the next run retries it."
+    },
     "withingsFullSyncResult": "{count} measurements fully synchronized",
     "withingsSyncFailed": "Sync failed",
     "withingsOauthConnected": "Withings connected — the first sync starts in the background.",
@@ -7873,6 +7878,9 @@
       "saveSelected": "Save {count} selected",
       "discardAll": "Discard all",
       "savedToast": "{count} lab results saved",
+      "savedPartialToast": "{count} lab results saved, {skipped} skipped as duplicates",
+      "savedNothingToast": "Nothing saved: {skipped} readings were already recorded",
+      "savedEmptyToast": "Nothing to save",
       "noRows": "No readings could be found in this report.",
       "nothingToSave": "Select at least one reading to save.",
       "saveFailed": "Couldn't save the readings. Please try again.",
diff --git a/messages/es.json b/messages/es.json
index 642747c38..0fdf76133 100644
--- a/messages/es.json
+++ b/messages/es.json
@@ -5148,6 +5148,11 @@
     "withingsFullSyncTitle": "¿Sincronización completa?",
     "withingsFullSyncDescription": "Se sincronizarán por completo todos los datos disponibles de Withings. Esto puede tardar un poco según tu historial.",
     "withingsSyncResult": "{count} mediciones sincronizadas",
+    "syncOutcome": {
+      "empty": "No hay nada nuevo que importar. Todo está al día.",
+      "failed": "No se guardó nada. El próximo intento lo repetirá.",
+      "partial": "{count} mediciones sincronizadas. Parte de los datos no se pudo guardar; el próximo intento lo repetirá."
+    },
     "withingsFullSyncResult": "{count} mediciones sincronizadas por completo",
     "withingsSyncFailed": "Falló la sincronización",
     "withingsOauthConnected": "Withings conectado — la primera sincronización comienza en segundo plano.",
@@ -7873,6 +7878,9 @@
       "saveSelected": "Guardar {count} seleccionados",
       "discardAll": "Descartar todo",
       "savedToast": "{count} resultados de laboratorio guardados",
+      "savedPartialToast": "{count} resultados de laboratorio guardados, {skipped} omitidos por duplicados",
+      "savedNothingToast": "No se guardó nada: {skipped} valores ya estaban registrados",
+      "savedEmptyToast": "No hay nada que guardar",
       "noRows": "No se encontraron valores en este informe.",
       "nothingToSave": "Selecciona al menos un valor para guardar.",
       "saveFailed": "No se pudieron guardar los valores. Inténtalo de nuevo.",
diff --git a/messages/fr.json b/messages/fr.json
index 604b61659..dab63fc75 100644
--- a/messages/fr.json
+++ b/messages/fr.json
@@ -5148,6 +5148,11 @@
     "withingsFullSyncTitle": "Synchronisation complète ?",
     "withingsFullSyncDescription": "Toutes les données Withings disponibles seront entièrement synchronisées. Cela peut prendre un certain temps selon votre historique.",
     "withingsSyncResult": "{count} mesures synchronisées",
+    "syncOutcome": {
+      "empty": "Rien de nouveau à importer. Tout est à jour.",
+      "failed": "Rien n'a été enregistré. La prochaine synchronisation réessaiera.",
+      "partial": "{count} mesures synchronisées. Une partie des données n'a pas pu être enregistrée ; la prochaine synchronisation réessaiera."
+    },
     "withingsFullSyncResult": "{count} mesures entièrement synchronisées",
     "withingsSyncFailed": "Échec de la synchronisation",
     "withingsOauthConnected": "Withings connecté — la première synchronisation démarre en arrière-plan.",
@@ -7873,6 +7878,9 @@
       "saveSelected": "Enregistrer {count} sélectionnées",
       "discardAll": "Tout abandonner",
       "savedToast": "{count} résultats de laboratoire enregistrés",
+      "savedPartialToast": "{count} résultats de laboratoire enregistrés, {skipped} ignorés car en double",
+      "savedNothingToast": "Rien enregistré : {skipped} valeurs étaient déjà présentes",
+      "savedEmptyToast": "Rien à enregistrer",
       "noRows": "Aucune valeur n'a pu être trouvée dans ce compte rendu.",
       "nothingToSave": "Sélectionnez au moins une valeur à enregistrer.",
       "saveFailed": "Impossible d'enregistrer les valeurs. Veuillez réessayer.",
diff --git a/messages/it.json b/messages/it.json
index 715a74ce6..4967cf325 100644
--- a/messages/it.json
+++ b/messages/it.json
@@ -5148,6 +5148,11 @@
     "withingsFullSyncTitle": "Sincronizzazione completa?",
     "withingsFullSyncDescription": "Tutti i dati Withings disponibili verranno sincronizzati completamente. Potrebbe richiedere del tempo a seconda del tuo storico.",
     "withingsSyncResult": "{count} misurazioni sincronizzate",
+    "syncOutcome": {
+      "empty": "Non c'è nulla di nuovo da importare. Tutto è aggiornato.",
+      "failed": "Non è stato salvato nulla. La prossima esecuzione riprova.",
+      "partial": "{count} misurazioni sincronizzate. Una parte dei dati non è stata salvata; la prossima esecuzione riprova."
+    },
     "withingsFullSyncResult": "{count} misurazioni sincronizzate completamente",
     "withingsSyncFailed": "Sincronizzazione non riuscita",
     "withingsOauthConnected": "Withings collegato — la prima sincronizzazione parte in background.",
@@ -7873,6 +7878,9 @@
       "saveSelected": "Salva {count} selezionati",
       "discardAll": "Scarta tutto",
       "savedToast": "{count} risultati di laboratorio salvati",
+      "savedPartialToast": "{count} risultati di laboratorio salvati, {skipped} ignorati perché duplicati",
+      "savedNothingToast": "Nulla salvato: {skipped} valori erano già registrati",
+      "savedEmptyToast": "Nulla da salvare",
       "noRows": "Nessun valore trovato in questo referto.",
       "nothingToSave": "Seleziona almeno un valore da salvare.",
       "saveFailed": "Impossibile salvare i valori. Riprova.",
diff --git a/messages/pl.json b/messages/pl.json
index 927e9b7e5..273d0af37 100644
--- a/messages/pl.json
+++ b/messages/pl.json
@@ -5148,6 +5148,11 @@
     "withingsFullSyncTitle": "Pełna synchronizacja?",
     "withingsFullSyncDescription": "Wszystkie dostępne dane Withings zostaną w pełni zsynchronizowane. Może to chwilę potrwać w zależności od historii.",
     "withingsSyncResult": "{count} pomiarów zsynchronizowano",
+    "syncOutcome": {
+      "empty": "Nie ma nic nowego do zaimportowania. Wszystko jest aktualne.",
+      "failed": "Nic nie zostało zapisane. Następne uruchomienie spróbuje ponownie.",
+      "partial": "Zsynchronizowano {count} pomiarów. Części danych nie udało się zapisać; następne uruchomienie spróbuje ponownie."
+    },
     "withingsFullSyncResult": "{count} pomiarów w pełni zsynchronizowano",
     "withingsSyncFailed": "Synchronizacja nie powiodła się",
     "withingsOauthConnected": "Withings połączony — pierwsza synchronizacja rozpocznie się w tle.",
@@ -7873,6 +7878,9 @@
       "saveSelected": "Zapisz {count} wybranych",
       "discardAll": "Odrzuć wszystko",
       "savedToast": "Zapisano {count} wyników laboratoryjnych",
+      "savedPartialToast": "Zapisano {count} wyników laboratoryjnych, {skipped} pominięto jako duplikaty",
+      "savedNothingToast": "Nic nie zapisano: {skipped} wyników było już zarejestrowanych",
+      "savedEmptyToast": "Nie ma nic do zapisania",
       "noRows": "W tym wyniku nie znaleziono żadnych wartości.",
       "nothingToSave": "Wybierz co najmniej jeden wynik do zapisania.",
       "saveFailed": "Nie udało się zapisać wyników. Spróbuj ponownie.",
diff --git a/src/__tests__/success-affordance-guard.test.ts b/src/__tests__/success-affordance-guard.test.ts
new file mode 100644
index 000000000..2bec7a7b9
--- /dev/null
+++ b/src/__tests__/success-affordance-guard.test.ts
@@ -0,0 +1,558 @@
+/**
+ * G3 — the success affordance is owned by the outcome module, everywhere.
+ *
+ * #640 established the rule inside the import panel: a write that wrote
+ * nothing must not read as a success. #650 widened it to the medication
+ * intake import. This widens it to the whole component tree, because the same
+ * defect had been sitting in seven more surfaces the whole time — six
+ * integration cards and the lab-OCR dialog reported "success" off `res.ok`,
+ * so a sync that imported nothing because every reading was refused rendered
+ * a green tick and a count.
+ *
+ * What this asserts:
+ *   1. Every `CheckCircle2` / `text-success` / `toast.success` occurrence
+ *      under `src/components` is either inside the shared presentation module
+ *      (`src/components/outcome/`) or pinned in `PINNED_AFFORDANCES` with an
+ *      exact per-file count. A name-only allowlist would let a listed file add
+ *      a SECOND, dishonest tick without anyone noticing, which is why the
+ *      counts are pinned rather than the filenames.
+ *   2. No pinned entry has gone stale — a file that no longer carries the
+ *      marker, or no longer exists, fails here rather than rotting silently.
+ *      This is the guard-of-the-guard: if the scanner ever stopped matching,
+ *      every entry would go stale at once and this is what would say so.
+ *   3. Every surface that reports a write routes its result line through the
+ *      shared outcome module.
+ *
+ * HOW WEAK THIS GUARD IS, stated plainly: this is the weakest guard in the
+ * release and it is not complete. It matches three literal tokens. It is
+ * evadable by synonym — `text-emerald-500`, a raw checkmark glyph, an
+ * `<svg>` copy of the icon, `toast(...)` with a success-looking variant, or a
+ * component that wraps any of them. Nothing here proves a surface is honest;
+ * it proves a surface did not reach for these three specific affordances
+ * without being listed. It also says nothing about `src/app`, which is out of
+ * scope by construction (the counted noise floor was measured over
+ * `src/components`). Treat a green run as "the known evasions are closed",
+ * not as "no surface can lie".
+ *
+ * Its forced failures, each watched fail before this was committed and then
+ * reverted:
+ *   - append `toast.success("probe")` to `src/components/ui/alert-dialog.tsx`
+ *     (no entry) -> red on the first case, naming the file;
+ *   - append a second `CheckCircle2` reference to
+ *     `src/components/onboarding/done-screen.tsx` -> red on the second case:
+ *     "CheckCircle2 pinned at 2, found 3";
+ *   - append a second `text-success` literal to
+ *     `src/components/settings/test-connection-button.tsx`, which is pinned at
+ *     exactly 1 -> red: "text-success pinned at 1, found 2".
+ */
+import { describe, it, expect } from "vitest";
+import { readFileSync, existsSync, readdirSync, statSync } from "node:fs";
+import { join, posix, relative, sep } from "node:path";
+
+const REPO_ROOT = join(__dirname, "..", "..");
+const COMPONENT_ROOT = join(REPO_ROOT, "src", "components");
+
+/** The tick component, the success colour token, the success toast. */
+const SUCCESS_MARKERS = [
+  "CheckCircle2",
+  "text-success",
+  "toast.success",
+] as const;
+
+type SuccessMarker = (typeof SUCCESS_MARKERS)[number];
+
+/**
+ * The one module allowed to reach for the affordance. `WrittenOutcomeLine`
+ * and `toastWrittenOutcome` bind it to the `success` key of the outcome table
+ * and nothing else can get at it.
+ */
+const PRESENTATION_DIR = "src/components/outcome/";
+
+/**
+ * Every OTHER file under `src/components` that mentions a marker, with the
+ * exact number of times it does. Seeded from the tree as it stands; an entry
+ * is not an endorsement, it is a record. Reducing one of these to zero is
+ * always welcome — delete the entry in the same commit.
+ */
+const PINNED_AFFORDANCES: Record<
+  string,
+  Partial<Record<SuccessMarker, number>>
+> = {
+  "src/components/admin/_shared.tsx": { "text-success": 2, "toast.success": 1 },
+  "src/components/admin/ai-server-key-section.tsx": { "toast.success": 1 },
+  "src/components/admin/api-token-overview-section.tsx": { "text-success": 1 },
+  "src/components/admin/app-log-preview-section.tsx": {
+    CheckCircle2: 2,
+    "text-success": 1,
+  },
+  "src/components/admin/assistant-section.tsx": { "toast.success": 1 },
+  "src/components/admin/backups-section.tsx": { "toast.success": 4 },
+  "src/components/admin/central-codex-section.tsx": { "toast.success": 2 },
+  "src/components/admin/danger-zone-section.tsx": { "text-success": 1 },
+  "src/components/admin/encryption-section.tsx": {
+    "text-success": 1,
+    "toast.success": 1,
+  },
+  "src/components/admin/glitchtip-section.tsx": { "toast.success": 1 },
+  "src/components/admin/invite-tokens-section.tsx": {
+    "text-success": 2,
+    "toast.success": 3,
+  },
+  "src/components/admin/login-overview-section.tsx": {
+    CheckCircle2: 2,
+    "text-success": 2,
+    "toast.success": 1,
+  },
+  "src/components/admin/module-availability-section.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/admin/recent-audit-preview.tsx": {
+    CheckCircle2: 2,
+    "text-success": 1,
+  },
+  "src/components/admin/reminders-section.tsx": {
+    CheckCircle2: 2,
+    "text-success": 4,
+    "toast.success": 2,
+  },
+  "src/components/admin/system-status-section.tsx": { "text-success": 6 },
+  "src/components/admin/system-status-summary.tsx": { "text-success": 3 },
+  "src/components/admin/umami-section.tsx": { "toast.success": 1 },
+  "src/components/admin/user-management-section.tsx": {
+    "text-success": 2,
+    "toast.success": 2,
+  },
+  "src/components/admin/version-tile-section.tsx": {
+    CheckCircle2: 2,
+    "text-success": 1,
+  },
+  "src/components/admin/web-push-vapid-section.tsx": { "toast.success": 1 },
+  "src/components/charts/medication-compliance-chart.tsx": {
+    "text-success": 1,
+  },
+  "src/components/custom-metrics/custom-metric-detail.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/custom-metrics/custom-metric-entry-form.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/custom-metrics/custom-metric-form.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/custom-metrics/custom-metric-history-list.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/cycle/cycle-phase-crosstab.tsx": { "text-success": 1 },
+  "src/components/dashboard/medication-intake-quick-add.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/dashboard/range-display.tsx": { "text-success": 2 },
+  "src/components/documents/document-card.tsx": { "text-success": 1 },
+  "src/components/documents/document-detail-sheet.tsx": { "toast.success": 2 },
+  "src/components/documents/documents-view.tsx": { "toast.success": 3 },
+  "src/components/error-details.tsx": { CheckCircle2: 2, "text-success": 1 },
+  "src/components/illness/episode-menu.tsx": {
+    CheckCircle2: 2,
+    "toast.success": 1,
+  },
+  "src/components/insights/coach-panel/chat-bubble.tsx": { "text-success": 4 },
+  "src/components/insights/coach-panel/history-rail.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/insights/coach-panel/plan-proposal-card.tsx": {
+    "text-success": 1,
+  },
+  "src/components/insights/coach-panel/reminder-suggestion-card.tsx": {
+    "text-success": 1,
+  },
+  "src/components/insights/coach-panel/self-context-adopt-offer.tsx": {
+    "text-success": 1,
+  },
+  "src/components/insights/coach-panel/suggested-action-card.tsx": {
+    "text-success": 1,
+  },
+  "src/components/insights/confidence-badge.ts": { "text-success": 1 },
+  "src/components/insights/daily-briefing.tsx": { "text-success": 1 },
+  "src/components/insights/derived/band-tokens.ts": { "text-success": 1 },
+  "src/components/insights/health-score-card.tsx": { "text-success": 4 },
+  "src/components/insights/insights-edit-mode.tsx": { "toast.success": 2 },
+  "src/components/insights/insights-tab-strip.tsx": { "toast.success": 1 },
+  "src/components/insights/mood/mood-better-days.tsx": { "text-success": 1 },
+  "src/components/insights/mood/mood-factor-metric-crosstab.tsx": {
+    "text-success": 1,
+  },
+  "src/components/insights/mood/mood-tag-influence.tsx": { "text-success": 1 },
+  "src/components/insights/mood/mood-tag-metric-crosstab.tsx": {
+    "text-success": 1,
+  },
+  "src/components/insights/nutrients/water-quick-add-sheet.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/insights/personal-record-badge.tsx": { "text-success": 1 },
+  "src/components/insights/recommendation-feedback.tsx": { "text-success": 3 },
+  "src/components/labs/biomarker-form.tsx": { "toast.success": 1 },
+  "src/components/labs/biomarker-manager.tsx": { "toast.success": 2 },
+  "src/components/labs/lab-biomarker-detail.tsx": { "toast.success": 1 },
+  "src/components/labs/lab-form.tsx": { "toast.success": 1 },
+  "src/components/labs/lab-history-list.tsx": { "toast.success": 3 },
+  "src/components/measurement-reminders/vorsorge-dashboard-card.tsx": {
+    CheckCircle2: 2,
+  },
+  "src/components/measurement-reminders/vorsorge-section.tsx": {
+    CheckCircle2: 2,
+    "text-success": 1,
+  },
+  "src/components/measurements/measurement-form.tsx": { "toast.success": 1 },
+  "src/components/measurements/measurement-list.tsx": { "toast.success": 3 },
+  "src/components/medications/card-parts/medication-status-pill.tsx": {
+    "text-success": 1,
+  },
+  "src/components/medications/dose-history-add-dialog.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/medications/dose-history-ledger.tsx": {
+    "text-success": 2,
+    "toast.success": 4,
+  },
+  "src/components/medications/intake-edit-dialog.tsx": { "toast.success": 1 },
+  "src/components/medications/intake-history-editable.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/medications/intake-history-list-v2.tsx": {
+    "text-success": 2,
+  },
+  "src/components/medications/research-mode-acknowledgment-dialog.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/medications/scheduling/schedule-history-timeline.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/medications/scheduling/schedule-times-editor.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/medications/sections/api-tokens-row.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/medications/sections/destructive-zone-section.tsx": {
+    "toast.success": 4,
+  },
+  "src/components/medications/sections/inventory-dialogs.tsx": {
+    "toast.success": 3,
+  },
+  "src/components/medications/sections/inventory-section.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/medications/sections/notifications-section.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/medications/sections/phase-config-sheet.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/medications/sections/settings-section.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/medications/take-all-due.ts": { "toast.success": 1 },
+  "src/components/medications/use-medication-intake.ts": { "toast.success": 4 },
+  "src/components/medications/wizard/medication-wizard-dialog.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/mood/manage/archived-tags-card.tsx": { "toast.success": 2 },
+  "src/components/mood/manage/tag-editor-sheet.tsx": { "toast.success": 2 },
+  "src/components/mood/manage/tag-groups-card.tsx": { "toast.success": 4 },
+  "src/components/mood/manage/tag-manager-card.tsx": { "toast.success": 2 },
+  "src/components/mood/mood-form.tsx": { "toast.success": 1 },
+  "src/components/mood/mood-list.tsx": { "toast.success": 3 },
+  "src/components/onboarding/done-screen.tsx": { CheckCircle2: 2 },
+  "src/components/onboarding/source-card-grid.tsx": { CheckCircle2: 2 },
+  "src/components/records/allergy-form.tsx": { "toast.success": 1 },
+  "src/components/records/allergy-manager.tsx": { "toast.success": 1 },
+  "src/components/records/conditions-manager.tsx": { "toast.success": 1 },
+  "src/components/records/family-history-form.tsx": { "toast.success": 1 },
+  "src/components/records/family-history-manager.tsx": { "toast.success": 1 },
+  "src/components/settings/_info-tile.tsx": { "text-success": 1 },
+  "src/components/settings/about-me-section.tsx": { "toast.success": 1 },
+  "src/components/settings/account-section/avatar-section.tsx": {
+    "text-success": 1,
+  },
+  "src/components/settings/account-section/index.tsx": { "text-success": 2 },
+  "src/components/settings/advanced-section.tsx": { "text-success": 2 },
+  "src/components/settings/ai/ai-insights-card.tsx": { "text-success": 1 },
+  "src/components/settings/ai/anthropic-provider-form.tsx": {
+    "text-success": 1,
+  },
+  "src/components/settings/ai/codex-provider-form.tsx": { "text-success": 2 },
+  "src/components/settings/ai/compat-provider-form.tsx": { "text-success": 1 },
+  "src/components/settings/ai/fallback-chain-card.tsx": { "text-success": 1 },
+  "src/components/settings/ai/local-provider-form.tsx": { "text-success": 1 },
+  "src/components/settings/ai/openai-provider-form.tsx": { "text-success": 1 },
+  "src/components/settings/ai/response-timeout-card.tsx": { "text-success": 1 },
+  "src/components/settings/ai/runtime-actions-row.tsx": { "text-success": 2 },
+  "src/components/settings/api-section.tsx": { "text-success": 3 },
+  "src/components/settings/coach-memory-section.tsx": { "toast.success": 2 },
+  "src/components/settings/coach-prefs-section.tsx": { "toast.success": 1 },
+  "src/components/settings/dashboard-layout-section.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/settings/email-card.tsx": { "text-success": 1 },
+  "src/components/settings/environment-section.tsx": { "toast.success": 4 },
+  "src/components/settings/insights-pill-order-section.tsx": {
+    "toast.success": 1,
+  },
+  "src/components/settings/integration-status-pill.tsx": {
+    CheckCircle2: 2,
+    "text-success": 1,
+  },
+  "src/components/settings/integrations/connections-panel.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/settings/integrations/fitbit-card.tsx": { "text-success": 2 },
+  "src/components/settings/integrations/google-health-card.tsx": {
+    "text-success": 2,
+  },
+  "src/components/settings/integrations/nightscout-card.tsx": {
+    "text-success": 1,
+  },
+  "src/components/settings/integrations/oauth-provider-card.tsx": {
+    "text-success": 1,
+  },
+  "src/components/settings/integrations/whoop-card.tsx": { "text-success": 2 },
+  "src/components/settings/integrations/withings-card.tsx": {
+    "text-success": 2,
+  },
+  "src/components/settings/mcp-section.tsx": {
+    "text-success": 5,
+    "toast.success": 2,
+  },
+  "src/components/settings/modules-section.tsx": { "toast.success": 1 },
+  "src/components/settings/notification-status-card.tsx": {
+    CheckCircle2: 2,
+    "text-success": 1,
+  },
+  "src/components/settings/ntfy-card.tsx": { "text-success": 1 },
+  "src/components/settings/security-sessions-card.tsx": { "text-success": 1 },
+  "src/components/settings/share-link-create-form.tsx": { "text-success": 3 },
+  "src/components/settings/sharing-section.tsx": { "text-success": 1 },
+  "src/components/settings/sources-section.tsx": { "toast.success": 2 },
+  "src/components/settings/telegram-card.tsx": { "text-success": 1 },
+  "src/components/settings/test-connection-button.tsx": {
+    CheckCircle2: 2,
+    "text-success": 1,
+  },
+  "src/components/settings/thresholds-editor-section.tsx": {
+    "toast.success": 2,
+  },
+  "src/components/settings/trusted-devices-card.tsx": { "text-success": 1 },
+  "src/components/settings/web-push-card.tsx": { "text-success": 1 },
+  "src/components/settings/webhook-card.tsx": { "text-success": 1 },
+  "src/components/targets/target-edit-sheet.tsx": { "toast.success": 2 },
+  "src/components/ui/password-strength.tsx": { "text-success": 2 },
+};
+
+/**
+ * Every surface that reports the result of a write, and the shared module it
+ * must render that result through. `forbidsMarkers` is set where the surface
+ * carries no legitimate success affordance of its own, so any marker in the
+ * file is by definition a hand-rolled verdict.
+ */
+const RESULT_SURFACES: ReadonlyArray<{
+  path: string;
+  through: RegExp;
+  forbidsMarkers: boolean;
+}> = [
+  // The import panel (#640) and the medication intake import (#650).
+  {
+    path: "src/components/settings/import-panel/csv-import-card.tsx",
+    through: /CsvImportResultView|WrittenOutcomeLine/,
+    forbidsMarkers: true,
+  },
+  {
+    path: "src/components/settings/import-panel/json-import-card.tsx",
+    through: /CsvImportResultView|WrittenOutcomeLine/,
+    forbidsMarkers: true,
+  },
+  {
+    path: "src/components/settings/import-panel/apple-health-import-card.tsx",
+    through: /CsvImportResultView|WrittenOutcomeLine/,
+    forbidsMarkers: true,
+  },
+  {
+    path: "src/components/settings/import-panel/import-result-view.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: true,
+  },
+  {
+    path: "src/components/medications/intake-import-result.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: true,
+  },
+  {
+    path: "src/components/medications/intake-import-dialog.tsx",
+    through: /IntakeImportResultView/,
+    forbidsMarkers: true,
+  },
+  {
+    path: "src/components/settings/import-panel/dose-history-import-card.tsx",
+    through: /IntakeImportResultView/,
+    forbidsMarkers: true,
+  },
+  {
+    path: "src/components/settings/import-panel/dose-history-verdict.tsx",
+    through: /IntakeImportSkipGroups/,
+    forbidsMarkers: true,
+  },
+  // The seven surfaces that were still gated on the transport.
+  {
+    path: "src/components/settings/integrations/fitbit-card.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: false,
+  },
+  {
+    path: "src/components/settings/integrations/google-health-card.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: false,
+  },
+  {
+    path: "src/components/settings/integrations/nightscout-card.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: false,
+  },
+  {
+    path: "src/components/settings/integrations/whoop-card.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: false,
+  },
+  {
+    path: "src/components/settings/integrations/withings-card.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: false,
+  },
+  {
+    path: "src/components/settings/integrations/oauth-provider-card.tsx",
+    through: /WrittenOutcomeLine/,
+    forbidsMarkers: false,
+  },
+  {
+    path: "src/components/labs/ocr-review-dialog.tsx",
+    through: /toastWrittenOutcome/,
+    forbidsMarkers: true,
+  },
+];
+
+/** Code only — a comment naming a marker is prose, not an affordance. */
+function stripComments(source: string): string {
+  return source.replace(/\/\*[\s\S]*?\*\//g, "").replace(/^\s*\/\/.*$/gm, "");
+}
+
+function readCode(relativePath: string): string {
+  return stripComments(readFileSync(join(REPO_ROOT, relativePath), "utf8"));
+}
+
+/** Every non-test component source file, as a repo-relative posix path. */
+function componentSourceFiles(): string[] {
+  const found: string[] = [];
+  const walk = (dir: string) => {
+    for (const entry of readdirSync(dir)) {
+      const full = join(dir, entry);
+      if (statSync(full).isDirectory()) {
+        if (entry === "__tests__") continue;
+        walk(full);
+        continue;
+      }
+      if (!entry.endsWith(".ts") && !entry.endsWith(".tsx")) continue;
+      found.push(relative(REPO_ROOT, full).split(sep).join(posix.sep));
+    }
+  };
+  walk(COMPONENT_ROOT);
+  return found.sort();
+}
+
+function markerCounts(
+  relativePath: string,
+): Partial<Record<SuccessMarker, number>> {
+  const source = readCode(relativePath);
+  const counts: Partial<Record<SuccessMarker, number>> = {};
+  for (const marker of SUCCESS_MARKERS) {
+    const uses = source.split(marker).length - 1;
+    if (uses > 0) counts[marker] = uses;
+  }
+  return counts;
+}
+
+describe("success affordance — owned by the outcome module, pinned everywhere else", () => {
+  it("lets no unlisted component reach for the success affordance", () => {
+    const unlisted = componentSourceFiles()
+      .filter((path) => !path.startsWith(PRESENTATION_DIR))
+      .filter((path) => !(path in PINNED_AFFORDANCES))
+      .filter((path) => Object.keys(markerCounts(path)).length > 0);
+    expect(
+      unlisted,
+      unlisted.length > 0
+        ? `File(s) hand-rolling a success affordance. Render the result through ` +
+            `WrittenOutcomeLine / toastWrittenOutcome, or add a pinned entry ` +
+            `here with a reason in the commit message: ${unlisted.join(", ")}`
+        : undefined,
+    ).toEqual([]);
+  });
+
+  it("holds every listed file to the exact count it was pinned at", () => {
+    const drifted: string[] = [];
+    for (const [path, pinned] of Object.entries(PINNED_AFFORDANCES)) {
+      if (!existsSync(join(REPO_ROOT, path))) continue;
+      const actual = markerCounts(path);
+      for (const marker of SUCCESS_MARKERS) {
+        const was = pinned[marker] ?? 0;
+        const now = actual[marker] ?? 0;
+        if (was !== now) {
+          drifted.push(`${path}: ${marker} pinned at ${was}, found ${now}`);
+        }
+      }
+    }
+    expect(
+      drifted,
+      drifted.length > 0
+        ? `A pinned file changed how often it reaches for the success ` +
+            `affordance. An ADDED one is the defect this guard exists for; a ` +
+            `REMOVED one is good news, update the count.\n${drifted.join("\n")}`
+        : undefined,
+    ).toEqual([]);
+  });
+
+  it("carries no stale entry — the guard-of-the-guard", () => {
+    const stale = Object.keys(PINNED_AFFORDANCES).filter((path) => {
+      if (!existsSync(join(REPO_ROOT, path))) return true;
+      return Object.keys(markerCounts(path)).length === 0;
+    });
+    expect(
+      stale,
+      stale.length > 0
+        ? `Pinned entr(ies) that no longer carry any marker (or no longer ` +
+            `exist). Delete them. If EVERY entry is listed here, the scanner ` +
+            `stopped matching and the guard is inert: ${stale.join(", ")}`
+        : undefined,
+    ).toEqual([]);
+  });
+
+  it("routes every write-reporting surface through the shared outcome module", () => {
+    for (const surface of RESULT_SURFACES) {
+      expect(
+        readCode(surface.path),
+        `${surface.path} must render its outcome through the shared module`,
+      ).toMatch(surface.through);
+    }
+  });
+
+  it("keeps the affordance out of the surfaces that own none of it", () => {
+    const offenders = RESULT_SURFACES.filter(
+      (surface) =>
+        surface.forbidsMarkers &&
+        Object.keys(markerCounts(surface.path)).length > 0,
+    ).map((surface) => surface.path);
+    expect(
+      offenders,
+      offenders.length > 0
+        ? `Surface(s) hand-rolling the success affordance instead of ` +
+            `classifying what was written: ${offenders.join(", ")}`
+        : undefined,
+    ).toEqual([]);
+  });
+});
diff --git a/src/components/labs/ocr-review-dialog.tsx b/src/components/labs/ocr-review-dialog.tsx
index fec4a1fcf..64a84bf44 100644
--- a/src/components/labs/ocr-review-dialog.tsx
+++ b/src/components/labs/ocr-review-dialog.tsx
@@ -14,6 +14,7 @@ import { useId, useMemo, useState } from "react";
 import { Loader2, ScanLine, Upload } from "lucide-react";
 import { toast } from "sonner";
 
+import { toastWrittenOutcome } from "@/components/outcome/outcome-toast";
 import { Button } from "@/components/ui/button";
 import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import { ApiError } from "@/lib/api/api-fetch";
@@ -184,8 +185,25 @@ export function OcrReviewDialog({
       { rows: payload, file: pickedFile },
       {
         onSuccess: (result) => {
-          toast.success(
-            t("labs.ocr.savedToast", { count: result.inserted.length }),
+          // The commit re-checks each confirmed row against what is already
+          // stored, so a re-scan can legitimately write nothing. The toast
+          // used to be green on any 200 and print the count regardless; the
+          // server resolves the outcome from the two lists and the dialog
+          // renders it.
+          toastWrittenOutcome(
+            result.outcome,
+            result.outcome === "success"
+              ? t("labs.ocr.savedToast", { count: result.inserted.length })
+              : result.outcome === "partial"
+                ? t("labs.ocr.savedPartialToast", {
+                    count: result.inserted.length,
+                    skipped: result.skipped.length,
+                  })
+                : result.outcome === "failed"
+                  ? t("labs.ocr.savedNothingToast", {
+                      skipped: result.skipped.length,
+                    })
+                  : t("labs.ocr.savedEmptyToast"),
           );
           onCommitted();
           handleClose(false);
diff --git a/src/components/outcome/__tests__/written-outcome-line.test.tsx b/src/components/outcome/__tests__/written-outcome-line.test.tsx
new file mode 100644
index 000000000..68cf2791a
--- /dev/null
+++ b/src/components/outcome/__tests__/written-outcome-line.test.tsx
@@ -0,0 +1,76 @@
+/**
+ * The outcome presentation, pinned per state.
+ *
+ * The classifier is proved in `src/lib/outcome/__tests__/written-outcome.test.ts`
+ * and the structural rule in `src/__tests__/success-affordance-guard.test.ts`.
+ * This is the middle piece: that the tick and the success colour are attached
+ * to the `success` state and to no other, and that the toast twin picks the
+ * matching sonner variant. Project convention is SSR-only component tests, so
+ * the line is rendered directly.
+ */
+import { describe, expect, it, vi } from "vitest";
+import { renderToStaticMarkup } from "react-dom/server";
+
+const toastCalls: Array<{ variant: string; message: string }> = [];
+vi.mock("sonner", () => ({
+  toast: {
+    success: (m: string) => toastCalls.push({ variant: "success", message: m }),
+    warning: (m: string) => toastCalls.push({ variant: "warning", message: m }),
+    error: (m: string) => toastCalls.push({ variant: "error", message: m }),
+    info: (m: string) => toastCalls.push({ variant: "info", message: m }),
+  },
+}));
+
+import { toastWrittenOutcome } from "../outcome-toast";
+import { WrittenOutcomeLine } from "../written-outcome-line";
+import type { WrittenOutcome } from "@/lib/outcome/written-outcome";
+
+function render(outcome: WrittenOutcome) {
+  return renderToStaticMarkup(
+    <WrittenOutcomeLine outcome={outcome} message="msg" testId="probe" />,
+  );
+}
+
+describe("WrittenOutcomeLine", () => {
+  it("carries the success colour only on the success state", () => {
+    expect(render("success")).toContain("text-success");
+    for (const other of ["partial", "failed", "empty"] as const) {
+      expect(render(other)).not.toContain("text-success");
+    }
+  });
+
+  it("exposes the outcome as a stable attribute for the tests below the UI", () => {
+    for (const outcome of [
+      "success",
+      "partial",
+      "failed",
+      "empty",
+    ] as const satisfies readonly WrittenOutcome[]) {
+      expect(render(outcome)).toContain(`data-outcome="${outcome}"`);
+    }
+  });
+
+  it("alerts on a result that did not fully write, and only reports otherwise", () => {
+    // A run that saved nothing is the one a user must not scroll past.
+    expect(render("failed")).toContain('role="alert"');
+    expect(render("partial")).toContain('role="alert"');
+    expect(render("success")).toContain('role="status"');
+    expect(render("empty")).toContain('role="status"');
+  });
+});
+
+describe("toastWrittenOutcome", () => {
+  it("raises the success toast only for a success", () => {
+    toastCalls.length = 0;
+    toastWrittenOutcome("success", "a");
+    toastWrittenOutcome("partial", "b");
+    toastWrittenOutcome("failed", "c");
+    toastWrittenOutcome("empty", "d");
+    expect(toastCalls).toEqual([
+      { variant: "success", message: "a" },
+      { variant: "warning", message: "b" },
+      { variant: "error", message: "c" },
+      { variant: "info", message: "d" },
+    ]);
+  });
+});
diff --git a/src/components/settings/import-panel/__tests__/import-result-guard.test.ts b/src/components/settings/import-panel/__tests__/import-result-guard.test.ts
deleted file mode 100644
index dcf939e18..000000000
--- a/src/components/settings/import-panel/__tests__/import-result-guard.test.ts
+++ /dev/null
@@ -1,138 +0,0 @@
-/**
- * #640 structural guard — "wrote nothing, looked successful" cannot come back.
- *
- * The classifier property in `import-result-state.test.ts` proves the rule.
- * This proves the rule is the only route to the affordance: the success icon
- * and the success colour exist in exactly one file in the import panel, on
- * exactly one key of the outcome table, and no card reaches for them
- * directly. A future card that hand-rolls a green tick fails here rather than
- * shipping and lying to a self-hoster about their sensor history.
- *
- * #650 widened it. The medication intake import is a third import surface, in
- * another directory, and it was not covered when the rule landed — it kept its
- * own success/error tone and reported a run that wrote one row out of
- * twenty-eight as a success. "Every import surface" now means every one of
- * them, listed by path, so a fourth surface has to be added here deliberately
- * rather than inheriting the old behaviour by being somewhere else.
- */
-import { describe, it, expect } from "vitest";
-import { readFileSync, readdirSync } from "node:fs";
-import { join } from "node:path";
-
-const PANEL_DIR = join(__dirname, "..");
-const PRESENTATION_FILE = "import-result-view.tsx";
-const REPO_ROOT = join(__dirname, "..", "..", "..", "..", "..");
-
-/**
- * Every surface that reports an import result, and the module each one must
- * render its outcome through. Paths from the repository root.
- */
-const IMPORT_SURFACES: ReadonlyArray<{ path: string; through: RegExp }> = [
-  {
-    path: "src/components/settings/import-panel/csv-import-card.tsx",
-    through: /CsvImportResultView|ImportOutcomeLine/,
-  },
-  {
-    path: "src/components/settings/import-panel/json-import-card.tsx",
-    through: /CsvImportResultView|ImportOutcomeLine/,
-  },
-  {
-    path: "src/components/settings/import-panel/apple-health-import-card.tsx",
-    through: /CsvImportResultView|ImportOutcomeLine/,
-  },
-  {
-    path: "src/components/medications/intake-import-result.tsx",
-    through: /ImportOutcomeLine/,
-  },
-  {
-    path: "src/components/medications/intake-import-dialog.tsx",
-    through: /IntakeImportResultView/,
-  },
-  {
-    path: "src/components/settings/import-panel/dose-history-import-card.tsx",
-    through: /IntakeImportResultView/,
-  },
-  {
-    path: "src/components/settings/import-panel/dose-history-verdict.tsx",
-    through: /IntakeImportSkipGroups/,
-  },
-];
-
-/** The success affordance: the tick component and the success colour token. */
-const SUCCESS_MARKERS = ["CheckCircle2", "text-success"] as const;
-
-function panelSourceFiles(): string[] {
-  return readdirSync(PANEL_DIR).filter(
-    (name) => name.endsWith(".ts") || name.endsWith(".tsx"),
-  );
-}
-
-/** Code only — a comment naming the marker is prose, not an affordance. */
-function stripComments(source: string): string {
-  return source.replace(/\/\*[\s\S]*?\*\//g, "").replace(/^\s*\/\/.*$/gm, "");
-}
-
-function readCode(name: string): string {
-  return stripComments(readFileSync(join(PANEL_DIR, name), "utf8"));
-}
-
-function readRepoCode(relativePath: string): string {
-  return stripComments(readFileSync(join(REPO_ROOT, relativePath), "utf8"));
-}
-
-describe("import panel — success affordance is owned by the outcome table", () => {
-  it("mentions the success markers in the presentation module only", () => {
-    const offenders = panelSourceFiles()
-      .filter((name) => name !== PRESENTATION_FILE)
-      .filter((name) => {
-        const source = readCode(name);
-        return SUCCESS_MARKERS.some((marker) => source.includes(marker));
-      });
-    expect(offenders).toEqual([]);
-  });
-
-  it("binds each success marker to the success outcome inside that module", () => {
-    const source = readCode(PRESENTATION_FILE);
-    for (const marker of SUCCESS_MARKERS) {
-      // Once as the lucide import (the tick only), once on the table row.
-      const uses = source.split(marker).length - 1;
-      expect(uses).toBe(marker === "CheckCircle2" ? 2 : 1);
-    }
-    // The table row itself: `success:` carries both markers, and no other
-    // outcome key does.
-    const successRow = source.match(/success:\s*\{[^}]*\}/)?.[0] ?? "";
-    expect(successRow).toContain("CheckCircle2");
-    expect(successRow).toContain("text-success");
-    for (const other of ["partial", "failed", "empty"]) {
-      const row = source.match(new RegExp(`${other}:\\s*\\{[^}]*\\}`))?.[0];
-      expect(row).toBeTruthy();
-      for (const marker of SUCCESS_MARKERS) {
-        expect(row).not.toContain(marker);
-      }
-    }
-  });
-
-  it("routes every import surface's result line through the shared outcome line", () => {
-    for (const surface of IMPORT_SURFACES) {
-      expect(
-        readRepoCode(surface.path),
-        `${surface.path} must render its outcome through the shared line`,
-      ).toMatch(surface.through);
-    }
-  });
-
-  it("keeps the success markers out of every import surface", () => {
-    const offenders = IMPORT_SURFACES.filter((surface) =>
-      SUCCESS_MARKERS.some((marker) =>
-        readRepoCode(surface.path).includes(marker),
-      ),
-    ).map((surface) => surface.path);
-    expect(
-      offenders,
-      offenders.length > 0
-        ? `Import surface(s) hand-rolling the success affordance instead of ` +
-            `classifying the counts: ${offenders.join(", ")}`
-        : undefined,
-    ).toEqual([]);
-  });
-});
diff --git a/src/components/settings/integrations/__tests__/sync-outcome.test.ts b/src/components/settings/integrations/__tests__/sync-outcome.test.ts
new file mode 100644
index 000000000..ae0da88d3
--- /dev/null
+++ b/src/components/settings/integrations/__tests__/sync-outcome.test.ts
@@ -0,0 +1,44 @@
+/**
+ * What a card is allowed to believe about a sync response.
+ *
+ * The cards used to read `res.ok` and print `json.data.imported`. They now
+ * read the resolved outcome the route computed, and refuse to guess: an
+ * envelope that does not carry all three fields is treated as a failed run,
+ * not as a success with a missing count. An unreadable answer is not evidence
+ * of a write.
+ */
+import { describe, expect, it } from "vitest";
+
+import { readSyncOutcome } from "../sync-outcome";
+
+describe("readSyncOutcome", () => {
+  it("narrows a well-formed envelope", () => {
+    expect(
+      readSyncOutcome({
+        data: { imported: 0, failed: true, outcome: "failed" },
+        error: null,
+      }),
+    ).toEqual({ imported: 0, failed: true, outcome: "failed" });
+  });
+
+  it("refuses an envelope that carries only the count", () => {
+    // The pre-fix shape. A card that accepted it would be back to reporting a
+    // number with no verdict attached.
+    expect(readSyncOutcome({ data: { imported: 12 }, error: null })).toBeNull();
+  });
+
+  it("refuses an unknown outcome value", () => {
+    expect(
+      readSyncOutcome({
+        data: { imported: 1, failed: false, outcome: "ok" },
+        error: null,
+      }),
+    ).toBeNull();
+  });
+
+  it("refuses an error envelope and anything that is not one at all", () => {
+    expect(readSyncOutcome({ data: null, error: "boom" })).toBeNull();
+    expect(readSyncOutcome(null)).toBeNull();
+    expect(readSyncOutcome("nope")).toBeNull();
+  });
+});
diff --git a/src/components/settings/integrations/fitbit-card.tsx b/src/components/settings/integrations/fitbit-card.tsx
index e6f30f8a8..caa222edc 100644
--- a/src/components/settings/integrations/fitbit-card.tsx
+++ b/src/components/settings/integrations/fitbit-card.tsx
@@ -42,6 +42,7 @@ import { SettingsCardHeader } from "@/components/settings/_card-header";
 import { IntegrationStatusPill } from "@/components/settings/integration-status-pill";
 import { TestConnectionButton } from "@/components/settings/test-connection-button";
 import { apiFetchRaw, apiPost } from "@/lib/api/api-fetch";
+import { WrittenOutcomeLine } from "@/components/outcome/written-outcome-line";
 import { useTranslations } from "@/lib/i18n/context";
 import {
   invalidateKeys,
@@ -56,6 +57,11 @@ import {
   type IntegrationStatusViewModel,
 } from "./shared";
 import { MetricFreshnessDisclosure } from "./metric-freshness-disclosure";
+import {
+  readSyncOutcome,
+  useSyncOutcomeMessage,
+  type SyncOutcomeState,
+} from "./sync-outcome";
 import {
   IntegrationCardDescription,
   IntegrationRedirectGuide,
@@ -67,11 +73,9 @@ export function FitbitCard({
   viewModel: IntegrationStatusViewModel | undefined;
 }) {
   const { t } = useTranslations();
+  const describeSyncOutcome = useSyncOutcomeMessage();
   const [syncing, setSyncing] = useState(false);
-  const [syncMsg, setSyncMsg] = useState<string | null>(null);
-  const [syncMsgType, setSyncMsgType] = useState<"success" | "error" | null>(
-    null,
-  );
+  const [syncResult, setSyncResult] = useState<SyncOutcomeState | null>(null);
   const [clientId, setClientId] = useState("");
   const [clientSecret, setClientSecret] = useState("");
   const [credsSaving, setCredsSaving] = useState(false);
@@ -116,8 +120,7 @@ export function FitbitCard({
 
   async function handleSync(fullSync = false) {
     setSyncing(true);
-    setSyncMsg(null);
-    setSyncMsgType(null);
+    setSyncResult(null);
     try {
       const res = await apiFetchRaw("/api/fitbit/sync", {
         method: "POST",
@@ -125,23 +128,32 @@ export function FitbitCard({
         body: JSON.stringify({ fullSync }),
       });
       const json = await res.json();
-      if (res.ok) {
-        setSyncMsg(
-          t("settings.fitbitSyncResult", { count: json.data.imported }),
-        );
-        setSyncMsgType("success");
+      const result = res.ok ? readSyncOutcome(json) : null;
+      if (result) {
+        // The tone comes off what the run wrote, not off `res.ok`.
+        setSyncResult({
+          outcome: result.outcome,
+          message: describeSyncOutcome(
+            result,
+            t("settings.fitbitSyncResult", { count: result.imported }),
+          ),
+        });
         void invalidateKeys(queryClient, measurementDependentKeys);
         queryClient.invalidateQueries({ queryKey: queryKeys.fitbit() });
         queryClient.invalidateQueries({
           queryKey: queryKeys.integrationsStatus(),
         });
       } else {
-        setSyncMsg(json.error || t("settings.fitbitSyncFailed"));
-        setSyncMsgType("error");
+        setSyncResult({
+          outcome: "failed",
+          message: json?.error || t("settings.fitbitSyncFailed"),
+        });
       }
     } catch {
-      setSyncMsg(t("settings.fitbitSyncFailed"));
-      setSyncMsgType("error");
+      setSyncResult({
+        outcome: "failed",
+        message: t("settings.fitbitSyncFailed"),
+      });
     } finally {
       setSyncing(false);
     }
@@ -472,13 +484,12 @@ export function FitbitCard({
                 {t("settings.fitbitBackfillInProgress")}
               </p>
             )}
-            {syncMsg && (
-              <p
-                role="alert"
-                className={`text-sm ${syncMsgType === "success" ? "text-success" : "text-destructive"}`}
-              >
-                {syncMsg}
-              </p>
+            {syncResult && (
+              <WrittenOutcomeLine
+                outcome={syncResult.outcome}
+                message={syncResult.message}
+                testId="fitbit-sync-result"
+              />
             )}
             {/* connect→data loop: a discreet link to where this provider's
                 readings now surface — doubles as the "your data is richer"
diff --git a/src/components/settings/integrations/google-health-card.tsx b/src/components/settings/integrations/google-health-card.tsx
index f88d2f591..f6efb5a58 100644
--- a/src/components/settings/integrations/google-health-card.tsx
+++ b/src/components/settings/integrations/google-health-card.tsx
@@ -50,6 +50,7 @@ import { SettingsCardHeader } from "@/components/settings/_card-header";
 import { IntegrationStatusPill } from "@/components/settings/integration-status-pill";
 import { TestConnectionButton } from "@/components/settings/test-connection-button";
 import { apiFetchRaw, apiPost } from "@/lib/api/api-fetch";
+import { WrittenOutcomeLine } from "@/components/outcome/written-outcome-line";
 import { useTranslations } from "@/lib/i18n/context";
 import {
   invalidateKeys,
@@ -64,6 +65,11 @@ import {
   type IntegrationStatusViewModel,
 } from "./shared";
 import { MetricFreshnessDisclosure } from "./metric-freshness-disclosure";
+import {
+  readSyncOutcome,
+  useSyncOutcomeMessage,
+  type SyncOutcomeState,
+} from "./sync-outcome";
 import { IntegrationCardDescription } from "./setup-guide-link";
 
 export function GoogleHealthCard({
@@ -72,11 +78,9 @@ export function GoogleHealthCard({
   viewModel: IntegrationStatusViewModel | undefined;
 }) {
   const { t } = useTranslations();
+  const describeSyncOutcome = useSyncOutcomeMessage();
   const [syncing, setSyncing] = useState(false);
-  const [syncMsg, setSyncMsg] = useState<string | null>(null);
-  const [syncMsgType, setSyncMsgType] = useState<"success" | "error" | null>(
-    null,
-  );
+  const [syncResult, setSyncResult] = useState<SyncOutcomeState | null>(null);
   const [clientId, setClientId] = useState("");
   const [clientSecret, setClientSecret] = useState("");
   const [credsSaving, setCredsSaving] = useState(false);
@@ -120,8 +124,7 @@ export function GoogleHealthCard({
 
   async function handleSync(fullSync = false) {
     setSyncing(true);
-    setSyncMsg(null);
-    setSyncMsgType(null);
+    setSyncResult(null);
     try {
       const res = await apiFetchRaw("/api/google-health/sync", {
         method: "POST",
@@ -129,23 +132,32 @@ export function GoogleHealthCard({
         body: JSON.stringify({ fullSync }),
       });
       const json = await res.json();
-      if (res.ok) {
-        setSyncMsg(
-          t("settings.googleHealthSyncResult", { count: json.data.imported }),
-        );
-        setSyncMsgType("success");
+      const result = res.ok ? readSyncOutcome(json) : null;
+      if (result) {
+        // The tone comes off what the run wrote, not off `res.ok`.
+        setSyncResult({
+          outcome: result.outcome,
+          message: describeSyncOutcome(
+            result,
+            t("settings.googleHealthSyncResult", { count: result.imported }),
+          ),
+        });
         void invalidateKeys(queryClient, measurementDependentKeys);
         queryClient.invalidateQueries({ queryKey: queryKeys.googleHealth() });
         queryClient.invalidateQueries({
           queryKey: queryKeys.integrationsStatus(),
         });
       } else {
-        setSyncMsg(json.error || t("settings.googleHealthSyncFailed"));
-        setSyncMsgType("error");
+        setSyncResult({
+          outcome: "failed",
+          message: json?.error || t("settings.googleHealthSyncFailed"),
+        });
       }
     } catch {
-      setSyncMsg(t("settings.googleHealthSyncFailed"));
-      setSyncMsgType("error");
+      setSyncResult({
+        outcome: "failed",
+        message: t("settings.googleHealthSyncFailed"),
+      });
     } finally {
       setSyncing(false);
     }
@@ -501,13 +513,12 @@ export function GoogleHealthCard({
                 {t("settings.googleHealthBackfillInProgress")}
               </p>
             )}
-            {syncMsg && (
-              <p
-                role="alert"
-                className={`text-sm ${syncMsgType === "success" ? "text-success" : "text-destructive"}`}
-              >
-                {syncMsg}
-              </p>
+            {syncResult && (
+              <WrittenOutcomeLine
+                outcome={syncResult.outcome}
+                message={syncResult.message}
+                testId="google-health-sync-result"
+              />
             )}
             {/* connect→data loop: a discreet link to where this provider's
                 readings now surface — doubles as the "your data is richer"
diff --git a/src/components/settings/integrations/nightscout-card.tsx b/src/components/settings/integrations/nightscout-card.tsx
index afd9a98b2..aa5e2e0de 100644
--- a/src/components/settings/integrations/nightscout-card.tsx
+++ b/src/components/settings/integrations/nightscout-card.tsx
@@ -43,6 +43,7 @@ import { SettingsCardHeader } from "@/components/settings/_card-header";
 import { IntegrationStatusPill } from "@/components/settings/integration-status-pill";
 import { TestConnectionButton } from "@/components/settings/test-connection-button";
 import { apiFetchRaw, apiPost } from "@/lib/api/api-fetch";
+import { WrittenOutcomeLine } from "@/components/outcome/written-outcome-line";
 import { useTranslations } from "@/lib/i18n/context";
 import {
   invalidateKeys,
@@ -51,6 +52,11 @@ import {
 } from "@/lib/query-keys";
 
 import { MetricFreshnessDisclosure } from "./metric-freshness-disclosure";
+import {
+  readSyncOutcome,
+  useSyncOutcomeMessage,
+  type SyncOutcomeState,
+} from "./sync-outcome";
 import {
   IntegrationErrorMessage,
   pillStateForVerdict,
@@ -65,6 +71,7 @@ export function NightscoutCard({
   viewModel?: IntegrationStatusViewModel;
 }) {
   const { t } = useTranslations();
+  const describeSyncOutcome = useSyncOutcomeMessage();
   const queryClient = useQueryClient();
 
   const [url, setUrl] = useState("");
@@ -74,10 +81,7 @@ export function NightscoutCard({
   const [msg, setMsg] = useState<string | null>(null);
   const [msgType, setMsgType] = useState<"success" | "error" | null>(null);
   const [syncing, setSyncing] = useState(false);
-  const [syncMsg, setSyncMsg] = useState<string | null>(null);
-  const [syncMsgType, setSyncMsgType] = useState<"success" | "error" | null>(
-    null,
-  );
+  const [syncResult, setSyncResult] = useState<SyncOutcomeState | null>(null);
 
   const status = viewModel;
 
@@ -144,27 +148,35 @@ export function NightscoutCard({
   // full-history dialog — Nightscout has no full-sync arm to call.
   async function handleSync() {
     setSyncing(true);
-    setSyncMsg(null);
-    setSyncMsgType(null);
+    setSyncResult(null);
     try {
       const res = await apiFetchRaw("/api/nightscout/sync", { method: "POST" });
       const json = await res.json();
-      if (res.ok) {
-        setSyncMsg(
-          t("settings.nightscoutSyncResult", { count: json.data.imported }),
-        );
-        setSyncMsgType("success");
+      const result = res.ok ? readSyncOutcome(json) : null;
+      if (result) {
+        // The tone comes off what the run wrote, not off `res.ok`.
+        setSyncResult({
+          outcome: result.outcome,
+          message: describeSyncOutcome(
+            result,
+            t("settings.nightscoutSyncResult", { count: result.imported }),
+          ),
+        });
         void invalidateKeys(queryClient, measurementDependentKeys);
         queryClient.invalidateQueries({
           queryKey: queryKeys.integrationsStatus(),
         });
       } else {
-        setSyncMsg(json.error || t("settings.nightscoutSyncFailed"));
-        setSyncMsgType("error");
+        setSyncResult({
+          outcome: "failed",
+          message: json?.error || t("settings.nightscoutSyncFailed"),
+        });
       }
     } catch {
-      setSyncMsg(t("settings.nightscoutSyncFailed"));
-      setSyncMsgType("error");
+      setSyncResult({
+        outcome: "failed",
+        message: t("settings.nightscoutSyncFailed"),
+      });
     } finally {
       setSyncing(false);
     }
@@ -401,14 +413,12 @@ export function NightscoutCard({
                 </AlertDialogContent>
               </AlertDialog>
             </div>
-            {syncMsg && (
-              <p
-                role="alert"
-                data-testid="nightscout-sync-result"
-                className={`text-sm ${syncMsgType === "success" ? "text-success" : "text-destructive"}`}
-              >
-                {syncMsg}
-              </p>
+            {syncResult && (
+              <WrittenOutcomeLine
+                outcome={syncResult.outcome}
+                message={syncResult.message}
+                testId="nightscout-sync-result"
+              />
             )}
             {/* connect→data loop: a discreet link to where the glucose
                 readings now surface — doubles as the "your data is richer"
diff --git a/src/components/settings/integrations/oauth-provider-card.tsx b/src/components/settings/integrations/oauth-provider-card.tsx
index c0290aeee..e0ed8a5f7 100644
--- a/src/components/settings/integrations/oauth-provider-card.tsx
+++ b/src/components/settings/integrations/oauth-provider-card.tsx
@@ -41,6 +41,7 @@ import { SettingsCardHeader } from "@/components/settings/_card-header";
 import { IntegrationStatusPill } from "@/components/settings/integration-status-pill";
 import { TestConnectionButton } from "@/components/settings/test-connection-button";
 import { apiFetchRaw, apiPost } from "@/lib/api/api-fetch";
+import { WrittenOutcomeLine } from "@/components/outcome/written-outcome-line";
 import { useTranslations } from "@/lib/i18n/context";
 import type {
   MetricFreshnessEntry,
@@ -52,6 +53,11 @@ import {
   queryKeys,
 } from "@/lib/query-keys";
 import { MetricFreshnessDisclosure } from "./metric-freshness-disclosure";
+import {
+  readSyncOutcome,
+  useSyncOutcomeMessage,
+  type SyncOutcomeState,
+} from "./sync-outcome";
 import { IntegrationErrorMessage, pillStateForVerdict } from "./shared";
 import {
   IntegrationCardDescription,
@@ -116,13 +122,11 @@ export function OAuthProviderCard({
   viewModel,
 }: OAuthProviderCardProps) {
   const { t } = useTranslations();
+  const describeSyncOutcome = useSyncOutcomeMessage();
   const queryClient = useQueryClient();
   const [msg, setMsg] = useState<string | null>(null);
   const [syncing, setSyncing] = useState(false);
-  const [syncMsg, setSyncMsg] = useState<string | null>(null);
-  const [syncMsgType, setSyncMsgType] = useState<"success" | "error" | null>(
-    null,
-  );
+  const [syncResult, setSyncResult] = useState<SyncOutcomeState | null>(null);
   const [clientId, setClientId] = useState("");
   const [clientSecret, setClientSecret] = useState("");
   const [credsSaving, setCredsSaving] = useState(false);
@@ -137,28 +141,38 @@ export function OAuthProviderCard({
   // full-history dialog — none of these providers has a full-sync arm to call.
   async function handleSync() {
     setSyncing(true);
-    setSyncMsg(null);
-    setSyncMsgType(null);
+    setSyncResult(null);
     try {
       const res = await apiFetchRaw(`/api/${provider}/sync`, {
         method: "POST",
       });
       const json = await res.json();
-      if (res.ok) {
-        setSyncMsg(t(`${i18nPrefix}SyncResult`, { count: json.data.imported }));
-        setSyncMsgType("success");
+      const result = res.ok ? readSyncOutcome(json) : null;
+      if (result) {
+        // The tone comes off what the run wrote, not off `res.ok`.
+        setSyncResult({
+          outcome: result.outcome,
+          message: describeSyncOutcome(
+            result,
+            t(`${i18nPrefix}SyncResult`, { count: result.imported }),
+          ),
+        });
         void invalidateKeys(queryClient, measurementDependentKeys);
         queryClient.invalidateQueries({ queryKey: statusQueryKey });
         queryClient.invalidateQueries({
           queryKey: queryKeys.integrationsStatus(),
         });
       } else {
-        setSyncMsg(json.error || t(`${i18nPrefix}SyncFailed`));
-        setSyncMsgType("error");
+        setSyncResult({
+          outcome: "failed",
+          message: json?.error || t(`${i18nPrefix}SyncFailed`),
+        });
       }
     } catch {
-      setSyncMsg(t(`${i18nPrefix}SyncFailed`));
-      setSyncMsgType("error");
+      setSyncResult({
+        outcome: "failed",
+        message: t(`${i18nPrefix}SyncFailed`),
+      });
     } finally {
       setSyncing(false);
     }
@@ -463,14 +477,12 @@ export function OAuthProviderCard({
                 </AlertDialogContent>
               </AlertDialog>
             </div>
-            {syncMsg && (
-              <p
-                role="alert"
-                data-testid={`${provider}-sync-result`}
-                className={`text-sm ${syncMsgType === "success" ? "text-success" : "text-destructive"}`}
-              >
-                {syncMsg}
-              </p>
+            {syncResult && (
+              <WrittenOutcomeLine
+                outcome={syncResult.outcome}
+                message={syncResult.message}
+                testId={`${provider}-sync-result`}
+              />
             )}
             {/* connect→data loop: a discreet link to where this provider's
                 readings now surface — doubles as the "your data is richer"
diff --git a/src/components/settings/integrations/sync-outcome.ts b/src/components/settings/integrations/sync-outcome.ts
new file mode 100644
index 000000000..3eccbb1cc
--- /dev/null
+++ b/src/components/settings/integrations/sync-outcome.ts
@@ -0,0 +1,77 @@
+"use client";
+
+import { useTranslations } from "@/lib/i18n/context";
+import type { WrittenOutcome } from "@/lib/outcome/written-outcome";
+
+/**
+ * What every provider-sync route answers with, and how a card says it.
+ *
+ * The cards used to key their tone off `res.ok`: the request came back, so the
+ * line went green and printed a count. A run that imported nothing because
+ * every reading was refused looked exactly like a clean one. The route now
+ * resolves the outcome from what was written, and the card only renders it.
+ */
+export interface SyncOutcomeResponse {
+  /** Rows that reached the database this run. */
+  imported: number;
+  /** True when any part of the run did not land. */
+  failed: boolean;
+  /** The resolved verdict — the card never recomputes this. */
+  outcome: WrittenOutcome;
+}
+
+/** What a card holds after a sync attempt, transport failures included. */
+export interface SyncOutcomeState {
+  outcome: WrittenOutcome;
+  message: string;
+}
+
+/**
+ * Narrow an envelope body to the resolved outcome, or `null` when the route
+ * answered something else. A card that gets `null` treats the run as failed
+ * rather than guessing — an unreadable answer is not evidence of a write.
+ */
+export function readSyncOutcome(body: unknown): SyncOutcomeResponse | null {
+  if (typeof body !== "object" || body === null) return null;
+  const data = (body as { data?: unknown }).data;
+  if (typeof data !== "object" || data === null) return null;
+  const { imported, failed, outcome } = data as Record<string, unknown>;
+  if (typeof imported !== "number") return null;
+  if (typeof failed !== "boolean") return null;
+  if (
+    outcome !== "empty" &&
+    outcome !== "failed" &&
+    outcome !== "partial" &&
+    outcome !== "success"
+  ) {
+    return null;
+  }
+  return { imported, failed, outcome };
+}
+
+/**
+ * Turn a resolved outcome into the sentence a card shows.
+ *
+ * The success wording stays per-provider (it names the provider's own count),
+ * so the caller passes it in; everything else is shared, because "some of it
+ * did not save" reads the same whoever the provider is. Written as literal
+ * `t(...)` calls so the i18n call-site coverage guard sees every key.
+ */
+export function useSyncOutcomeMessage(): (
+  result: SyncOutcomeResponse,
+  successMessage: string,
+) => string {
+  const { t } = useTranslations();
+  return (result, successMessage) => {
+    switch (result.outcome) {
+      case "success":
+        return successMessage;
+      case "empty":
+        return t("settings.syncOutcome.empty");
+      case "partial":
+        return t("settings.syncOutcome.partial", { count: result.imported });
+      case "failed":
+        return t("settings.syncOutcome.failed");
+    }
+  };
+}
diff --git a/src/components/settings/integrations/whoop-card.tsx b/src/components/settings/integrations/whoop-card.tsx
index bdd5f4397..8d697411a 100644
--- a/src/components/settings/integrations/whoop-card.tsx
+++ b/src/components/settings/integrations/whoop-card.tsx
@@ -33,6 +33,7 @@ import { SettingsCardHeader } from "@/components/settings/_card-header";
 import { IntegrationStatusPill } from "@/components/settings/integration-status-pill";
 import { TestConnectionButton } from "@/components/settings/test-connection-button";
 import { apiFetchRaw, apiPost } from "@/lib/api/api-fetch";
+import { WrittenOutcomeLine } from "@/components/outcome/written-outcome-line";
 import { useTranslations } from "@/lib/i18n/context";
 import {
   invalidateKeys,
@@ -47,6 +48,11 @@ import {
   type IntegrationStatusViewModel,
 } from "./shared";
 import { MetricFreshnessDisclosure } from "./metric-freshness-disclosure";
+import {
+  readSyncOutcome,
+  useSyncOutcomeMessage,
+  type SyncOutcomeState,
+} from "./sync-outcome";
 import {
   IntegrationCardDescription,
   IntegrationRedirectGuide,
@@ -58,11 +64,9 @@ export function WhoopCard({
   viewModel: IntegrationStatusViewModel | undefined;
 }) {
   const { t } = useTranslations();
+  const describeSyncOutcome = useSyncOutcomeMessage();
   const [syncing, setSyncing] = useState(false);
-  const [syncMsg, setSyncMsg] = useState<string | null>(null);
-  const [syncMsgType, setSyncMsgType] = useState<"success" | "error" | null>(
-    null,
-  );
+  const [syncResult, setSyncResult] = useState<SyncOutcomeState | null>(null);
   const [clientId, setClientId] = useState("");
   const [clientSecret, setClientSecret] = useState("");
   const [credsSaving, setCredsSaving] = useState(false);
@@ -109,8 +113,7 @@ export function WhoopCard({
 
   async function handleSync(fullSync = false) {
     setSyncing(true);
-    setSyncMsg(null);
-    setSyncMsgType(null);
+    setSyncResult(null);
     try {
       const res = await apiFetchRaw("/api/whoop/sync", {
         method: "POST",
@@ -118,23 +121,32 @@ export function WhoopCard({
         body: JSON.stringify({ fullSync }),
       });
       const json = await res.json();
-      if (res.ok) {
-        setSyncMsg(
-          t("settings.whoopSyncResult", { count: json.data.imported }),
-        );
-        setSyncMsgType("success");
+      const result = res.ok ? readSyncOutcome(json) : null;
+      if (result) {
+        // The tone comes off what the run wrote, not off `res.ok`.
+        setSyncResult({
+          outcome: result.outcome,
+          message: describeSyncOutcome(
+            result,
+            t("settings.whoopSyncResult", { count: result.imported }),
+          ),
+        });
         void invalidateKeys(queryClient, measurementDependentKeys);
         queryClient.invalidateQueries({ queryKey: queryKeys.whoop() });
         queryClient.invalidateQueries({
           queryKey: queryKeys.integrationsStatus(),
         });
       } else {
-        setSyncMsg(json.error || t("settings.whoopSyncFailed"));
-        setSyncMsgType("error");
+        setSyncResult({
+          outcome: "failed",
+          message: json?.error || t("settings.whoopSyncFailed"),
+        });
       }
     } catch {
-      setSyncMsg(t("settings.whoopSyncFailed"));
-      setSyncMsgType("error");
+      setSyncResult({
+        outcome: "failed",
+        message: t("settings.whoopSyncFailed"),
+      });
     } finally {
       setSyncing(false);
     }
@@ -454,13 +466,12 @@ export function WhoopCard({
                 {t("settings.whoopBackfillInProgress")}
               </p>
             )}
-            {syncMsg && (
-              <p
-                role="alert"
-                className={`text-sm ${syncMsgType === "success" ? "text-success" : "text-destructive"}`}
-              >
-                {syncMsg}
-              </p>
+            {syncResult && (
+              <WrittenOutcomeLine
+                outcome={syncResult.outcome}
+                message={syncResult.message}
+                testId="whoop-sync-result"
+              />
             )}
             {/* connect→data loop: a discreet link to where this provider's
                 readings now surface — doubles as the "your data is richer"
diff --git a/src/components/settings/integrations/withings-card.tsx b/src/components/settings/integrations/withings-card.tsx
index 15f929a85..c3048e72b 100644
--- a/src/components/settings/integrations/withings-card.tsx
+++ b/src/components/settings/integrations/withings-card.tsx
@@ -32,6 +32,7 @@ import { SettingsCardHeader } from "@/components/settings/_card-header";
 import { IntegrationStatusPill } from "@/components/settings/integration-status-pill";
 import { TestConnectionButton } from "@/components/settings/test-connection-button";
 import { apiFetchRaw, apiPost } from "@/lib/api/api-fetch";
+import { WrittenOutcomeLine } from "@/components/outcome/written-outcome-line";
 import { useTranslations } from "@/lib/i18n/context";
 import {
   invalidateKeys,
@@ -46,6 +47,11 @@ import {
   type IntegrationStatusViewModel,
 } from "./shared";
 import { MetricFreshnessDisclosure } from "./metric-freshness-disclosure";
+import {
+  readSyncOutcome,
+  useSyncOutcomeMessage,
+  type SyncOutcomeState,
+} from "./sync-outcome";
 import {
   IntegrationCardDescription,
   IntegrationRedirectGuide,
@@ -57,11 +63,9 @@ export function WithingsCard({
   viewModel: IntegrationStatusViewModel | undefined;
 }) {
   const { t } = useTranslations();
+  const describeSyncOutcome = useSyncOutcomeMessage();
   const [syncing, setSyncing] = useState(false);
-  const [syncMsg, setSyncMsg] = useState<string | null>(null);
-  const [syncMsgType, setSyncMsgType] = useState<"success" | "error" | null>(
-    null,
-  );
+  const [syncResult, setSyncResult] = useState<SyncOutcomeState | null>(null);
   const [clientId, setClientId] = useState("");
   const [clientSecret, setClientSecret] = useState("");
   const [credsSaving, setCredsSaving] = useState(false);
@@ -111,8 +115,7 @@ export function WithingsCard({
 
   async function handleSync(fullSync = false) {
     setSyncing(true);
-    setSyncMsg(null);
-    setSyncMsgType(null);
+    setSyncResult(null);
     try {
       const res = await apiFetchRaw("/api/withings/sync", {
         method: "POST",
@@ -120,26 +123,33 @@ export function WithingsCard({
         body: JSON.stringify({ fullSync }),
       });
       const json = await res.json();
-      if (res.ok) {
-        setSyncMsg(
-          fullSync
-            ? t("settings.withingsFullSyncResult", {
-                count: json.data.imported,
-              })
-            : t("settings.withingsSyncResult", { count: json.data.imported }),
-        );
-        setSyncMsgType("success");
+      const result = res.ok ? readSyncOutcome(json) : null;
+      if (result) {
+        // The tone comes off what the run wrote, not off `res.ok`.
+        setSyncResult({
+          outcome: result.outcome,
+          message: describeSyncOutcome(
+            result,
+            fullSync
+              ? t("settings.withingsFullSyncResult", { count: result.imported })
+              : t("settings.withingsSyncResult", { count: result.imported }),
+          ),
+        });
         void invalidateKeys(queryClient, measurementDependentKeys);
         queryClient.invalidateQueries({
           queryKey: queryKeys.integrationsStatus(),
         });
       } else {
-        setSyncMsg(json.error || t("settings.withingsSyncFailed"));
-        setSyncMsgType("error");
+        setSyncResult({
+          outcome: "failed",
+          message: json?.error || t("settings.withingsSyncFailed"),
+        });
       }
     } catch {
-      setSyncMsg(t("settings.withingsSyncFailed"));
-      setSyncMsgType("error");
+      setSyncResult({
+        outcome: "failed",
+        message: t("settings.withingsSyncFailed"),
+      });
     } finally {
       setSyncing(false);
     }
@@ -505,13 +515,12 @@ export function WithingsCard({
                 </AlertDialogContent>
               </AlertDialog>
             </div>
-            {syncMsg && (
-              <p
-                role="alert"
-                className={`text-sm ${syncMsgType === "success" ? "text-success" : "text-destructive"}`}
-              >
-                {syncMsg}
-              </p>
+            {syncResult && (
+              <WrittenOutcomeLine
+                outcome={syncResult.outcome}
+                message={syncResult.message}
+                testId="withings-sync-result"
+              />
             )}
             {/* connect→data loop: a discreet link to where this provider's
                 readings now surface — doubles as the "your data is richer"
diff --git a/src/lib/oura/__tests__/sync.test.ts b/src/lib/oura/__tests__/sync.test.ts
index 7851a749a..2c51946a0 100644
--- a/src/lib/oura/__tests__/sync.test.ts
+++ b/src/lib/oura/__tests__/sync.test.ts
@@ -567,7 +567,6 @@ describe("syncUserOura", () => {
     // blanked — and the partial rides back with the count, so the card can
     // report a warning rather than a tick over a run that lost a collection.
     expect(result).toEqual({ imported: 2, failed: true });
-    const imported = result.imported;
     const written = createdRows().map((row) => row.type);
     expect(written).toContain("SLEEP_SCORE");
     expect(written).toContain("OXYGEN_SATURATION");
diff --git a/src/lib/validations/labs-ocr.ts b/src/lib/validations/labs-ocr.ts
index 13eab118d..e9f3ff516 100644
--- a/src/lib/validations/labs-ocr.ts
+++ b/src/lib/validations/labs-ocr.ts
@@ -18,6 +18,8 @@
  */
 import { z } from "zod/v4";
 
+import type { WrittenOutcome } from "@/lib/outcome/written-outcome";
+
 import { validateEntryInstant } from "@/lib/validations/entry-instant";
 
 /** Max rows a single scan / commit may carry — a dense panel is ~30 analytes. */
@@ -200,6 +202,13 @@ export interface OcrSkippedRowDto {
 export interface OcrCommitResponseDto {
   inserted: unknown[];
   skipped: OcrSkippedRowDto[];
+  /**
+   * How the commit reads, resolved server-side from the two lists. The dialog
+   * renders this rather than assuming a 200 means readings were saved — a
+   * re-scan in which every confirmed row turned out to be a duplicate writes
+   * nothing and must not report a green toast.
+   */
+  outcome: WrittenOutcome;
 }
 
 /** The capability-probe response (drives whether the UI shows the scan entry). */