feat: Add floating summary bar with draft management, snapshot, and Excel export functionalities.

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);
         }

src/features/snapshots/api/save-snapshot.ts

@@ -24,11 +24,13 @@ 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;
 
+    try {
         const [created] = await db
             .insert(sessionSnapshots)
             .values({
@@ -42,4 +44,8 @@ export async function saveSnapshot(raw: unknown) {
             .returning({ id: sessionSnapshots.id });
 
         return { success: true, snapshotId: created?.id };
+    } catch (err) {
+        console.error("Snapshot DB insertion error:", err);
+        return { success: false, error: "Database error during insertion" };
+    }
 }