fix(files,tables): restore new-file editor autofocus and CSV import error toasts

Both were dropped on the staging line and regressed vs production (main):

- Files: the new-file editor autofocus chain (files.tsx -> file-viewer ->
  text-editor) was stripped by the react-doctor dead-code pass in #4544,
  which misread the prop-drilled `autoFocus` (consumed by an imperative
  `editor.focus()` effect) as unused. Restored the prop through all three
  layers and the one-shot focus effect so creating a new file focuses the
  editor immediately.
- Tables: CSV import failures were silently logged with no user feedback.
  Restored the per-file and generic `toast.error` surfacing.

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/file-viewer.tsx

@@ -43,6 +43,7 @@ interface FileViewerProps {
   workspaceId: string
   canEdit: boolean
   previewMode?: PreviewMode
+  autoFocus?: boolean
   onDirtyChange?: (isDirty: boolean) => void
   onSaveStatusChange?: (status: 'idle' | 'saving' | 'saved' | 'error') => void
   saveRef?: React.MutableRefObject<(() => Promise<void>) | null>
@@ -57,6 +58,7 @@ export function FileViewer({
   workspaceId,
   canEdit,
   previewMode,
+  autoFocus,
   onDirtyChange,
   onSaveStatusChange,
   saveRef,
@@ -74,6 +76,7 @@ export function FileViewer({
         workspaceId={workspaceId}
         canEdit={canEdit}
         previewMode={previewMode ?? 'editor'}
+        autoFocus={autoFocus}
         onDirtyChange={onDirtyChange}
         onSaveStatusChange={onSaveStatusChange}
         saveRef={saveRef}

apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/text-editor.tsx

@@ -392,6 +392,7 @@ interface TextEditorProps {
   workspaceId: string
   canEdit: boolean
   previewMode: PreviewMode
+  autoFocus?: boolean
   onDirtyChange?: (isDirty: boolean) => void
   onSaveStatusChange?: (status: 'idle' | 'saving' | 'saved' | 'error') => void
   saveRef?: React.MutableRefObject<(() => Promise<void>) | null>
@@ -406,6 +407,7 @@ export const TextEditor = memo(function TextEditor({
   workspaceId,
   canEdit,
   previewMode,
+  autoFocus,
   onDirtyChange,
   onSaveStatusChange,
   saveRef,
@@ -417,6 +419,7 @@ export const TextEditor = memo(function TextEditor({
   const containerRef = useRef<HTMLDivElement>(null)
   const monacoEditorRef = useRef<Parameters<OnMount>[0] | null>(null)
   const lastSyncedContentRef = useRef('')
+  const hasAutoFocusedRef = useRef(false)
   const contentRef = useRef('')
   const textareaStuckRef = useRef(false)
   const suppressScrollListenerRef = useRef(false)
@@ -633,6 +636,11 @@ export const TextEditor = memo(function TextEditor({
       lastSyncedContentRef.current = currentContent
     }
 
+    if (autoFocus && !hasAutoFocusedRef.current) {
+      hasAutoFocusedRef.current = true
+      editor.focus()
+    }
+
     const contextMenuDisposable = editor.onContextMenu((e) => {
       e.event.preventDefault()
       const sel = editor.getSelection()

apps/sim/app/workspace/[workspaceId]/files/files.tsx

@@ -1851,6 +1851,7 @@ export function Files() {
             workspaceId={workspaceId}
             canEdit={canEdit}
             previewMode={previewMode}
+            autoFocus={isNewFile || justCreatedFileIdRef.current === selectedFile.id}
             onDirtyChange={setIsDirty}
             onSaveStatusChange={setSaveStatus}
             saveRef={saveRef}

apps/sim/app/workspace/[workspaceId]/tables/tables.tsx

@@ -398,6 +398,7 @@ export function Tables() {
         }
 
         setUploadProgress({ completed: 0, total: csvFiles.length })
+        const failed: string[] = []
 
         for (let i = 0; i < csvFiles.length; i++) {
           try {
@@ -410,13 +411,23 @@ export function Tables() {
               }
             }
           } catch (err) {
+            failed.push(csvFiles[i].name)
             logger.error('Error uploading CSV:', err)
           } finally {
             setUploadProgress({ completed: i + 1, total: csvFiles.length })
           }
         }
+
+        if (failed.length > 0) {
+          toast.error(
+            failed.length === 1
+              ? `Failed to import ${failed[0]}`
+              : `Failed to import ${failed.length} file${failed.length > 1 ? 's' : ''}: ${failed.join(', ')}`
+          )
+        }
       } catch (err) {
         logger.error('Error uploading CSV:', err)
+        toast.error('Failed to import CSV')
       } finally {
         setUploading(false)
         setUploadProgress({ completed: 0, total: 0 })