fix(files): route drops through the selected target

webui/src/features/files/FilesPage.tsx

@@ -439,6 +439,16 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
     return activeDialogTarget;
   }
 
+  function uploadRejectedReason(target: FileActionTarget | null): string {
+    if (busy || uploadActive) return "Another file operation is already running. Wait until it finishes before dropping files.";
+    if (!canUpload) return "You do not have permission to upload files here.";
+    if (!target) return "Choose a destination folder before dropping files.";
+    const targetSpace = findSpace(target.spaceId);
+    if (!targetSpace) return "The selected upload destination is no longer available.";
+    if (isConnectorSpace(targetSpace)) return "Files cannot be uploaded into connector spaces from this view.";
+    return "The dropped item cannot be uploaded here.";
+  }
+
   function openDialog(kind: DialogKind, target: FileActionTarget | null = null) {
     if ((kind === "upload" || kind === "connector-sync") && !canUpload) return;
     if (kind === "connector-space" && !canOrganize) return;
@@ -615,10 +625,12 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
 
 
   async function handleFilesUpload(fileList: FileList | File[], options: {conflictStrategy?: ConflictStrategy;conflictResolutions?: ConflictResolution[];bypassConflictDialog?: boolean;target?: FileActionTarget;} = {}) {
-    if (!canUpload) return;
     const target = options.target ?? currentActionTarget();
     const targetSpace = target ? findSpace(target.spaceId) : null;
-    if (!target || !targetSpace || isConnectorSpace(targetSpace)) return;
+    if (busy || uploadActive || !canUpload || !target || !targetSpace || isConnectorSpace(targetSpace)) {
+      setError(uploadRejectedReason(target));
+      return;
+    }
     const selected = Array.from(fileList);
     if (selected.length === 0) return;
     if (!options.bypassConflictDialog && !unpackZip) {
@@ -678,13 +690,7 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
   }
 
   async function uploadExternalFilesToTarget(fileList: FileList | File[], target: FileActionTarget) {
-    const previousTarget = dialogTarget;
-    setDialogTarget(target);
-    try {
-      await handleFilesUpload(fileList);
-    } finally {
-      setDialogTarget(previousTarget);
-    }
+    await handleFilesUpload(fileList, { target });
   }
 
   async function openConnectorSyncDialog(target: FileActionTarget | null = toolbarTarget()) {
@@ -1339,8 +1345,20 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
       setDropTargetKey(reason || noop ? "" : dropTargetId(target));
       return;
     }
-    event.dataTransfer.dropEffect = canUpload ? "copy" : "none";
-    setDropTargetKey(canUpload ? dropTargetId(target) : "");
+    event.dataTransfer.dropEffect = canUpload && !busy && !uploadActive ? "copy" : "none";
+    setDropTargetKey(canUpload && !busy && !uploadActive ? dropTargetId(target) : "");
+  }
+
+  function handleCurrentFolderDragOver(event: ReactDragEvent<HTMLElement>) {
+    const target = toolbarTarget();
+    if (!target) {
+      event.preventDefault();
+      event.stopPropagation();
+      event.dataTransfer.dropEffect = "none";
+      setDropTargetKey("");
+      return;
+    }
+    handleDropTargetDragOver(event, target);
   }
 
   async function handleDropOnTarget(event: ReactDragEvent<HTMLElement>, target: FileActionTarget) {
@@ -1348,7 +1366,11 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
     event.stopPropagation();
     setDragActive(false);
     setDropTargetKey("");
-    if (isConnectorSpace(findSpace(target.spaceId))) return;
+    const hasDroppedFiles = event.dataTransfer.files.length > 0;
+    if (isConnectorSpace(findSpace(target.spaceId))) {
+      if (hasDroppedFiles) setError(uploadRejectedReason(target));
+      return;
+    }
     if (isInternalDrag(event)) {
       if (!canOrganize) return;
       const state = internalDrag ?? parseDragState(event.dataTransfer.getData(INTERNAL_DRAG_TYPE));
@@ -1361,9 +1383,27 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
       await runTransfer(event.ctrlKey ? "copy" : "move", state.sourceSpaceId, { fileIds: new Set(state.fileIds), folderPaths: new Set(state.folderPaths) }, target);
       return;
     }
-    if (canUpload && event.dataTransfer.files.length > 0) {
+    if (hasDroppedFiles) {
+      if (!canUpload || busy || uploadActive) {
+        setError(uploadRejectedReason(target));
+        return;
+      }
       await uploadExternalFilesToTarget(event.dataTransfer.files, target);
+      return;
     }
+    setError("Drop one or more files from your computer, or drag files and folders from this file space.");
+  }
+
+  async function handleDropOnCurrentFolder(event: ReactDragEvent<HTMLElement>) {
+    const target = toolbarTarget();
+    if (!target) {
+      event.preventDefault();
+      event.stopPropagation();
+      setDropTargetKey("");
+      setError(uploadRejectedReason(null));
+      return;
+    }
+    await handleDropOnTarget(event, target);
   }
 
   function clearDropState() {
@@ -1940,6 +1980,9 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
 
   }
 
+  const currentFolderDropTarget = toolbarTarget();
+  const currentFolderDropActive = currentFolderDropTarget ? dropTargetKey === dropTargetId(currentFolderDropTarget) : false;
+
   return (
     <div className="workspace-data-page module-entry-page file-manager-page file-manager-fullscreen">
       {error &&
@@ -2051,9 +2094,12 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
           renderConnectorSpaceContent() :
 
           <div
-            className="file-list-drop-target"
+            className={`file-list-drop-target ${currentFolderDropActive ? "is-drop-target" : ""}`}
             ref={fileListViewportRef}
             onScroll={(event) => setFileListScrollTop(event.currentTarget.scrollTop)}
+            onDragOver={handleCurrentFolderDragOver}
+            onDragLeave={clearDropState}
+            onDrop={(event) => void handleDropOnCurrentFolder(event)}
             onContextMenu={(event) => openContextMenu(event, "empty")}
             onClick={(event) => {
               if (event.target === event.currentTarget) applySelectionKeys(new Set<EntrySelectionKey>());
@@ -2179,13 +2225,14 @@ export default function FilesPage({ settings, auth }: {settings: ApiSettings;aut
       {dialog === "upload" &&
       <FileDialog title={i18nMessage("i18n:govoplan-files.upload_to_value_value.b83a34b4", { value0: activeDialogSpace?.label || "i18n:govoplan-files.files.6ce6c512", value1: activeDialogTarget?.folderPath || "i18n:govoplan-files.root.e96857c5" })} onClose={closeDialog}>
           <FileDropZone
-          disabled={busy || !activeDialogSpace || !canUpload}
+          disabled={busy || !activeDialogTarget || !activeDialogSpace || isConnectorSpace(activeDialogSpace) || !canUpload}
           busy={uploadActive}
           progress={visibleUploadProgress}
           busyLabel={uploadBusyLabel}
           progressLabel={uploadProgressLabel}
           note={`Files are uploaded into ${activeDialogTarget?.folderPath || "i18n:govoplan-files.root.e96857c5"}.`}
-          onFiles={(files) => handleFilesUpload(files)} />
+          onRejectedDrop={(reason) => setError(reason === "disabled" ? uploadRejectedReason(activeDialogTarget) : "The browser did not provide readable file data for this drop. Use the file picker, or drag local files from a file manager that exposes file contents to the browser.")}
+          onFiles={(files) => handleFilesUpload(files, { target: activeDialogTarget || undefined })} />
         
           <ToggleSwitch label="i18n:govoplan-files.unpack_zip_uploads.256fead4" checked={unpackZip} onChange={setUnpackZip} disabled={busy} />
           <div className="field-block">