MDH: drop inaccurate 'significant memory' warning from large download/export modals

The download/export engine streams each batch directly to disk via
showSaveFilePicker, with backpressure capping the in-flight working set
at ~20k docs (MAX_BUFFERED * BATCH_SIZE) regardless of total size. Peak
memory is bounded and independent of collection size on that path, so the
'use significant memory' warning was misleading. Only the rare Blob
fallback (picker unavailable/denied) holds the full output in memory.

Reword all 8 confirm modals (JSON/NDJSON download + CSV/XML export, full
and filtered) to keep the accurate 'may take a while' and drop the memory
claim. No 'streams to disk' assertion added, since the Blob fallback does
not stream.

Author: mrtnzlml

src/mdh/components/DataPanel.jsx

@@ -432,7 +432,7 @@ export default function DataPanel() {
     if (tc !== null && tc > 10_000) {
       const proceed = await confirmModal(
         'Large collection',
-        `This collection has ${tc.toLocaleString()} documents. Downloading may take a while and use significant memory. Continue?`,
+        `This collection has ${tc.toLocaleString()} documents. Downloading may take a while. Continue?`,
       );
       if (!proceed) return;
     }
@@ -496,7 +496,7 @@ export default function DataPanel() {
       setDownloadState(null);
       const proceed = await confirmModal(
         'Large download',
-        `This filter matches ${filteredCount.toLocaleString()} documents. Downloading may take a while and use significant memory. Continue?`,
+        `This filter matches ${filteredCount.toLocaleString()} documents. Downloading may take a while. Continue?`,
       );
       if (!proceed) return;
     }
@@ -512,7 +512,7 @@ export default function DataPanel() {
   async function downloadAllJsonl() {
     const tc = pagination.totalCount.value;
     if (tc !== null && tc > 10_000) {
-      const proceed = await confirmModal('Large collection', `This collection has ${tc.toLocaleString()} documents. Downloading may take a while and use significant memory. Continue?`);
+      const proceed = await confirmModal('Large collection', `This collection has ${tc.toLocaleString()} documents. Downloading may take a while. Continue?`);
       if (!proceed) return;
     }
     const col = collection;
@@ -562,7 +562,7 @@ export default function DataPanel() {
     if (downloadCancelRef.current) { setDownloadState(null); return; }
     if (filteredCount > 10_000) {
       setDownloadState(null);
-      const proceed = await confirmModal('Large download', `This filter matches ${filteredCount.toLocaleString()} documents. Downloading may take a while and use significant memory. Continue?`);
+      const proceed = await confirmModal('Large download', `This filter matches ${filteredCount.toLocaleString()} documents. Downloading may take a while. Continue?`);
       if (!proceed) return;
     }
     await runDownloadJob({
@@ -590,7 +590,7 @@ export default function DataPanel() {
           if (tc !== null && tc > 10_000) {
             const proceed = await confirmModal(
               'Large collection',
-              `This collection has ${tc.toLocaleString()} documents. Exporting may take a while and use significant memory. Continue?`,
+              `This collection has ${tc.toLocaleString()} documents. Exporting may take a while. Continue?`,
             );
             if (!proceed) return;
           }
@@ -656,7 +656,7 @@ export default function DataPanel() {
             setDownloadState(null);
             const proceed = await confirmModal(
               'Large export',
-              `This filter matches ${filteredCount.toLocaleString()} documents. Exporting may take a while and use significant memory. Continue?`,
+              `This filter matches ${filteredCount.toLocaleString()} documents. Exporting may take a while. Continue?`,
             );
             if (!proceed) return;
           }
@@ -683,7 +683,7 @@ export default function DataPanel() {
         onDownload={async ({ rootName, recordName }) => {
           const tc = pagination.totalCount.value;
           if (tc !== null && tc > 10_000) {
-            const proceed = await confirmModal('Large collection', `This collection has ${tc.toLocaleString()} documents. Exporting may take a while and use significant memory. Continue?`);
+            const proceed = await confirmModal('Large collection', `This collection has ${tc.toLocaleString()} documents. Exporting may take a while. Continue?`);
             if (!proceed) return;
           }
           await runDownloadJob({
@@ -742,7 +742,7 @@ export default function DataPanel() {
             setDownloadState(null);
             const proceed = await confirmModal(
               'Large export',
-              `This filter matches ${filteredCount.toLocaleString()} documents. Exporting may take a while and use significant memory. Continue?`,
+              `This filter matches ${filteredCount.toLocaleString()} documents. Exporting may take a while. Continue?`,
             );
             if (!proceed) return;
           }