diff --git a/src/features/grid/components/floating-summary-bar.tsx b/src/features/grid/components/floating-summary-bar.tsx
index 58b9469..26f9e6a 100644
--- a/src/features/grid/components/floating-summary-bar.tsx
+++ b/src/features/grid/components/floating-summary-bar.tsx
@@ -81,7 +81,10 @@ export function FloatingSummaryBar() {
             }
         } catch (err) {
             console.error(err);
-            if (!labelOverride) alert("Erreur lors de la création du snapshot.");
+            if (!labelOverride) {
+                const msg = err instanceof Error ? err.message : String(err);
+                alert(`Erreur lors de la création du snapshot : ${msg}`);
+            }
         } finally {
             setIsSavingSnapshot(false);
         }
diff --git a/src/features/snapshots/api/save-snapshot.ts b/src/features/snapshots/api/save-snapshot.ts
index 56931d1..1b9f4d3 100644
--- a/src/features/snapshots/api/save-snapshot.ts
+++ b/src/features/snapshots/api/save-snapshot.ts
@@ -24,22 +24,28 @@ const SaveSnapshotSchema = z.object({
 export async function saveSnapshot(raw: unknown) {
     const parsed = SaveSnapshotSchema.safeParse(raw);
     if (!parsed.success) {
-        return { success: false, error: "Validation failed: " + parsed.error.message };
+        console.error("Snapshot validation failed:", parsed.error.format());
+        return { success: false, error: "Validation failed: " + parsed.error.issues.map((i: any) => i.message).join(", ") };
     }
 
     const { codeFournisseur, nomFournisseur, magasin, label, changes, summary } = parsed.data;
 
-    const [created] = await db
-        .insert(sessionSnapshots)
-        .values({
-            codeFournisseur,
-            nomFournisseur: nomFournisseur ?? null,
-            magasin,
-            label: label ?? `Snapshot — ${new Date().toLocaleDateString("fr-FR")}`,
-            changes,
-            summaryJson: summary ?? null,
-        })
-        .returning({ id: sessionSnapshots.id });
+    try {
+        const [created] = await db
+            .insert(sessionSnapshots)
+            .values({
+                codeFournisseur,
+                nomFournisseur: nomFournisseur ?? null,
+                magasin,
+                label: label ?? `Snapshot — ${new Date().toLocaleDateString("fr-FR")}`,
+                changes,
+                summaryJson: summary ?? null,
+            })
+            .returning({ id: sessionSnapshots.id });
 
-    return { success: true, snapshotId: created?.id };
+        return { success: true, snapshotId: created?.id };
+    } catch (err) {
+        console.error("Snapshot DB insertion error:", err);
+        return { success: false, error: "Database error during insertion" };
+    }
 }