feat: timeline and folder import

frontend/src/components/layout/LeftSidebar.tsx

@@ -3,7 +3,6 @@ import {
   ChevronRight,
   ChevronDown,
   Folder,
-
   Image,
   Calendar,
   Star,
@@ -11,9 +10,14 @@ import {
   Trash2,
   Plus,
   MoreHorizontal,
-  HardDrive
+  HardDrive,
+  RefreshCw
 } from 'lucide-react'
 import clsx from 'clsx'
+import { AddSourceFolderDialog } from '../dialogs/AddSourceFolderDialog'
+import { sourceFolders, library } from '../../services/api'
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
+import { toast } from '../ToastContainer'
 
 interface TreeItem {
   id: string
@@ -27,6 +31,65 @@ interface TreeItem {
 export function LeftSidebar() {
   const [expandedItems, setExpandedItems] = useState<Set<string>>(new Set(['library', 'folders', 'heaps']))
   const [selectedItem, setSelectedItem] = useState<string | null>('all-photos')
+  const [showAddFolderDialog, setShowAddFolderDialog] = useState(false)
+  const [isScanning, setIsScanning] = useState(false)
+  
+  const queryClient = useQueryClient()
+  
+  // Fetch folders from API
+  const { data: foldersData, refetch: refetchFolders } = useQuery({
+    queryKey: ['folders'],
+    queryFn: sourceFolders.list,
+  })
+  
+  // Mutation for adding folders
+  const addFolderMutation = useMutation({
+    mutationFn: async ({ path, recursive }: { path: string; recursive: boolean }) => {
+      // Add the folder
+      const folder = await sourceFolders.add(path, recursive)
+      // Trigger scan for the new folder
+      await sourceFolders.scan(folder.id)
+      return folder
+    },
+    onSuccess: (folder) => {
+      toast.success('Folder Added', `Scanning ${folder.name || folder.path}...`)
+      // Refetch folders list
+      refetchFolders()
+      // Refetch photos to show new ones
+      queryClient.invalidateQueries({ queryKey: ['photos'] })
+    },
+    onError: (error: any) => {
+      toast.error('Failed to Add Folder', error.message || 'An error occurred')
+    },
+  })
+  
+  // Mutation for scanning all folders
+  const scanLibraryMutation = useMutation({
+    mutationFn: library.scan,
+    onMutate: () => {
+      setIsScanning(true)
+      toast.info('Scan Started', 'Scanning all folders for new photos...')
+    },
+    onSuccess: () => {
+      toast.success('Scan Complete', 'All folders have been scanned')
+    },
+    onError: (error: any) => {
+      toast.error('Scan Failed', error.message || 'Failed to scan folders')
+    },
+    onSettled: () => {
+      setIsScanning(false)
+      // Refetch photos after scan
+      queryClient.invalidateQueries({ queryKey: ['photos'] })
+    },
+  })
+  
+  const handleAddFolder = async (path: string, recursive: boolean) => {
+    await addFolderMutation.mutateAsync({ path, recursive })
+  }
+  
+  const handleScanAll = () => {
+    scanLibraryMutation.mutate()
+  }
   
   const toggleExpanded = (id: string) => {
     const newExpanded = new Set(expandedItems)
@@ -55,7 +118,13 @@ export function LeftSidebar() {
       id: 'folders',
       label: 'Folders',
       icon: <Folder className="h-4 w-4" />,
-      children: [], // Will be populated from API
+      children: foldersData?.folders?.map((folder: any) => ({
+        id: `folder-${folder.id}`,
+        label: folder.name || folder.path.split('/').pop() || folder.path,
+        icon: <Folder className="h-4 w-4" />,
+        count: folder.photo_count,
+        type: 'folder',
+      })) || [],
     },
     {
       id: 'heaps',
@@ -162,12 +231,32 @@ export function LeftSidebar() {
       </div>
       
       {/* Bottom Actions */}
-      <div className="border-t border-border p-3">
-        <button className="flex w-full items-center gap-2 rounded bg-surface-2 px-3 py-2 text-sm text-text hover:bg-surface-offset">
+      <div className="border-t border-border p-3 space-y-2">
+        <button 
+          onClick={() => setShowAddFolderDialog(true)}
+          className="flex w-full items-center gap-2 rounded bg-surface-2 px-3 py-2 text-sm text-text hover:bg-surface-offset"
+        >
           <Plus className="h-4 w-4" />
           Add Source Folder
         </button>
+        {foldersData?.folders?.length > 0 && (
+          <button 
+            onClick={handleScanAll}
+            disabled={isScanning}
+            className="flex w-full items-center gap-2 rounded bg-surface-2 px-3 py-2 text-sm text-text hover:bg-surface-offset disabled:opacity-50"
+          >
+            <RefreshCw className={clsx("h-4 w-4", isScanning && "animate-spin")} />
+            {isScanning ? 'Scanning...' : 'Scan All Folders'}
+          </button>
+        )}
       </div>
+      
+      {/* Add Source Folder Dialog */}
+      <AddSourceFolderDialog
+        isOpen={showAddFolderDialog}
+        onClose={() => setShowAddFolderDialog(false)}
+        onAdd={handleAddFolder}
+      />
     </div>
   )
 }