feat: manual Save All button in TopBar with pending change tracking

Changes are now queued locally (yellow highlight) and only persisted to
Supabase when the user clicks the Save button in the top-right corner.
The button shows the count of pending changes and a spinner while saving.
EditPanel closes immediately after queuing — no Supabase call per edit.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/App.tsx

@@ -39,6 +39,8 @@ export default function App() {
   const [isLoadingDefault, setIsLoadingDefault] = useState(true);
   const [defaultLoadError, setDefaultLoadError] = useState<string | null>(null);
   const [rowStatuses, setRowStatuses] = useState<Record<string, string>>({});
+  const [pendingRows, setPendingRows] = useState<Record<string, ExcelRow>>({});
+  const [isSavingAll, setIsSavingAll] = useState(false);
 
   useEffect(() => {
     const loadDefaultData = async () => {
@@ -238,31 +240,37 @@ export default function App() {
     setAppState(prev => ({ ...prev, hasUnsavedChanges: false }));
   };
 
-  const handleSaveRow = async (rowIndex: number, updatedRow: ExcelRow): Promise<boolean> => {
-    // 1. Optimistically update UI
+  const handleSaveRow = (rowIndex: number, updatedRow: ExcelRow) => {
+    // Update local UI state only — no Supabase call here.
+    // Changes are queued in pendingRows and saved manually via handleSaveAll.
     setAppState(prev => {
       const newData = [...prev.data];
       newData[rowIndex] = updatedRow;
       return { ...prev, data: newData, hasUnsavedChanges: true };
     });
-
     const articleNo = String(updatedRow[COLUMNS.ARTICLE_NO]);
+    setPendingRows(prev => ({ ...prev, [articleNo]: updatedRow }));
     setRowStatuses(prev => ({ ...prev, [articleNo]: 'pending' }));
+    setEditingRowIndex(null);
+  };
 
-    // 2. Persist to Supabase
-    const success = await saveRowToSupabase(articleNo, updatedRow);
-
-    if (success) {
-      setRowStatuses(prev => ({ ...prev, [articleNo]: 'saved' }));
-      setAppState(prev => ({ ...prev, hasUnsavedChanges: false }));
-      setEditingRowIndex(null); // Close panel only after confirmed save
-    } else {
-      console.error(`Failed to save ${articleNo} to Supabase`);
-      setRowStatuses(prev => ({ ...prev, [articleNo]: 'error' }));
-      // Panel stays open so user can retry
+  const handleSaveAll = async () => {
+    const entries = Object.entries(pendingRows) as [string, ExcelRow][];
+    if (entries.length === 0) return;
+    setIsSavingAll(true);
+    let allSuccess = true;
+    for (const [articleNo, rowData] of entries) {
+      const success = await saveRowToSupabase(articleNo, rowData);
+      if (success) {
+        setRowStatuses(prev => ({ ...prev, [articleNo]: 'saved' }));
+        setPendingRows(prev => { const n = { ...prev }; delete n[articleNo]; return n; });
+      } else {
+        setRowStatuses(prev => ({ ...prev, [articleNo]: 'error' }));
+        allSuccess = false;
+      }
     }
-
-    return success;
+    if (allSuccess) setAppState(prev => ({ ...prev, hasUnsavedChanges: false }));
+    setIsSavingAll(false);
   };
 
   const captureState = (message: string) => {
@@ -334,6 +342,9 @@ export default function App() {
         onUndo={handleUndo}
         undoMessage={undoHistory[0]?.message}
         undoSteps={undoHistory.length}
+        pendingCount={Object.keys(pendingRows).length}
+        onSaveAll={handleSaveAll}
+        isSavingAll={isSavingAll}
       />
       <div className="flex flex-1 overflow-hidden">
         <Sidebar activeModule={activeModule} setActiveModule={setActiveModule} />

src/components/EditPanel.tsx

@@ -8,7 +8,7 @@ import { ConfirmModal } from './ConfirmModal';
 interface EditPanelProps {
   row: ExcelRow;
   rowIndex: number;
-  onSave: (rowIndex: number, updatedRow: ExcelRow) => Promise<boolean>;
+  onSave: (rowIndex: number, updatedRow: ExcelRow) => void;
   onClose: () => void;
   onCaptureState: (message: string) => void;
 }
@@ -33,8 +33,6 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
 
   const [loadingField, setLoadingField] = useState<string | null>(null);
   const [error, setError] = useState<string | null>(null);
-  const [isSaving, setIsSaving] = useState(false);
-  const [saveError, setSaveError] = useState(false);
   const [isConfirmOpen, setIsConfirmOpen] = useState(false);
   const [pendingGeminiField, setPendingGeminiField] = useState<keyof typeof formData | null>(null);
   const [generatedFields, setGeneratedFields] = useState<Set<string>>(new Set());
@@ -136,11 +134,8 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
     }
   };
 
-  const handleSave = async () => {
+  const handleSave = () => {
     setIsConfirmOpen(false);
-    setSaveError(false);
-    setIsSaving(true);
-
     const hasModifications = Object.keys(formData).some(k => isModified(k as keyof typeof formData));
     if (hasModifications) {
       onCaptureState(`Updated product ${row[COLUMNS.ARTICLE_NO]}`);
@@ -160,13 +155,7 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
     newRow[COLUMNS.MOQ] = formData.moq;
     newRow[COLUMNS.DETAILS_DE] = formData.detailsDe;
     newRow[COLUMNS.DETAILS_EN] = formData.detailsEn;
-
-    const success = await onSave(rowIndex, newRow);
-    // If save failed, panel stays open — handleSaveRow in App.tsx won't call setEditingRowIndex(null)
-    if (!success) {
-      setSaveError(true);
-    }
-    setIsSaving(false);
+    onSave(rowIndex, newRow);
   };
 
   const DimensionInput = ({ label, field, placeholder }: { label: string, field: keyof typeof formData, placeholder?: string }) => (
@@ -315,25 +304,18 @@ export function EditPanel({ row, rowIndex, onSave, onClose, onCaptureState }: Ed
         </div>
 
         <div className="p-6 border-t border-slate-700 bg-slate-800/50 flex justify-end gap-3">
-          {saveError && (
-            <span className="flex items-center text-sm text-red-400 mr-auto">
-              Error saving — check your connection and retry.
-            </span>
-          )}
           <button
             onClick={onClose}
-            disabled={isSaving}
-            className="px-4 py-2 text-sm font-medium text-slate-300 hover:text-white hover:bg-slate-700 rounded-md transition-colors disabled:opacity-50"
+            className="px-4 py-2 text-sm font-medium text-slate-300 hover:text-white hover:bg-slate-700 rounded-md transition-colors"
           >
             Cancel
           </button>
           <button
             onClick={() => setIsConfirmOpen(true)}
-            disabled={isSaving}
-            className="flex items-center gap-2 px-4 py-2 bg-blue-600 hover:bg-blue-700 disabled:opacity-60 text-white text-sm font-medium rounded-md shadow-lg shadow-blue-900/20 transition-colors"
+            className="flex items-center gap-2 px-4 py-2 bg-blue-600 hover:bg-blue-700 text-white text-sm font-medium rounded-md shadow-lg shadow-blue-900/20 transition-colors"
           >
-            {isSaving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
-            {isSaving ? 'Saving...' : saveError ? 'Retry Save' : 'Save to Memory'}
+            <Save className="w-4 h-4" />
+            Queue Changes
           </button>
         </div>
         <ConfirmModal 

src/components/TopBar.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import { Download, Database, LogOut, Undo2 } from 'lucide-react';
+import { Download, LogOut, Undo2, CloudUpload, Loader2 } from 'lucide-react';
 import { cn } from '../lib/utils';
 
 interface TopBarProps {
@@ -13,9 +13,12 @@ interface TopBarProps {
   onUndo: () => void;
   undoMessage?: string;
   undoSteps: number;
+  pendingCount: number;
+  onSaveAll: () => Promise<void>;
+  isSavingAll: boolean;
 }
 
-export function TopBar({ stats, onExport, hasData, hasUnsavedChanges, userEmail, onSignOut, canUndo, onUndo, undoMessage, undoSteps }: TopBarProps) {
+export function TopBar({ stats, onExport, hasData, hasUnsavedChanges, userEmail, onSignOut, canUndo, onUndo, undoMessage, undoSteps, pendingCount, onSaveAll, isSavingAll }: TopBarProps) {
   return (
     <header className="bg-[#020812] border-b border-slate-700/30 h-32 flex items-center justify-between px-10 shrink-0 z-10 shadow-2xl">
       <div className="flex items-center -ml-4">
@@ -56,6 +59,16 @@ export function TopBar({ stats, onExport, hasData, hasUnsavedChanges, userEmail,
       )}
 
       <div className="flex items-center gap-3">
+        {pendingCount > 0 && (
+          <button
+            onClick={onSaveAll}
+            disabled={isSavingAll}
+            className="flex items-center gap-2 px-4 py-2 rounded-md text-sm font-bold transition-all bg-green-600 hover:bg-green-500 disabled:opacity-60 text-white shadow-lg shadow-green-900/30"
+          >
+            {isSavingAll ? <Loader2 className="w-4 h-4 animate-spin" /> : <CloudUpload className="w-4 h-4" />}
+            {isSavingAll ? 'Saving...' : `Save ${pendingCount} change${pendingCount > 1 ? 's' : ''}`}
+          </button>
+        )}
         {hasData && (
           <button
             onClick={onExport}