feat: add keroma

frontend/src/app/platform/AppSidebar.tsx

@@ -3,7 +3,7 @@
  */
 
 import React, { useCallback, useMemo } from 'react'
-import { Link, useNavigate, useParams } from 'react-router-dom'
+import { Link, useNavigate, useParams, useLocation } from 'react-router-dom'
 import {
   Sidebar,
   SidebarContent,
@@ -17,7 +17,7 @@ import {
   SidebarRail,
   SidebarTrigger,
 } from '@/components/ui/sidebar'
-import { Plus, ListTodo, Settings } from 'lucide-react'
+import { Plus, Settings, Triangle } from 'lucide-react'
 import { Tooltip, TooltipContent, TooltipTrigger } from '@/components/ui/tooltip'
 import { useSidebar } from '@/components/ui/sidebar'
 import { usePlatform } from './platformContext'
@@ -35,7 +35,9 @@ export function AppSidebar() {
     return recentProjectIds.map((id) => byId.get(id)).filter((p): p is Project => p != null)
   }, [orderedProjects, recentProjectIds])
   const navigate = useNavigate()
+  const location = useLocation()
   const { projectId: selectedProjectId } = useParams<{ projectId: string }>()
+  const isKeroma = location.pathname === '/keroma'
 
   const handleSelectProject = useCallback((id: string) => navigate(`/projects/${id}`), [navigate])
 
@@ -130,13 +132,21 @@ export function AppSidebar() {
           <SidebarGroup>
             <SidebarMenu>
               <SidebarMenuItem>
-                <SidebarMenuButton asChild tooltip="All projects" isActive={!selectedProjectId}>
+                <SidebarMenuButton asChild tooltip="All projects" isActive={location.pathname === '/projects' && !selectedProjectId}>
                   <Link to="/projects">
-                    <ListTodo className="size-4" />
+                    <Triangle className="size-4" />
                     <span>Pleroma</span>
                   </Link>
                 </SidebarMenuButton>
               </SidebarMenuItem>
+              <SidebarMenuItem>
+                <SidebarMenuButton asChild tooltip="Keroma" isActive={isKeroma}>
+                  <Link to="/keroma">
+                    <Triangle className="size-4 rotate-180" />
+                    <span>Keroma</span>
+                  </Link>
+                </SidebarMenuButton>
+              </SidebarMenuItem>
             </SidebarMenu>
           </SidebarGroup>
           {recentProjects.length > 0 && (

frontend/src/app/platform/KeromaPage.tsx

@@ -0,0 +1,20 @@
+/**
+ * Keroma page. Rendered at /keroma.
+ */
+
+import React from 'react'
+
+export function KeromaPage() {
+  return (
+    <div className="relative flex flex-1 flex-col min-h-0 p-4">
+      <div className="flex flex-wrap items-center gap-3">
+        <h1 className="p-3 scroll-m-20 text-4xl font-extrabold tracking-tight text-balance">
+          Keroma
+        </h1>
+      </div>
+      <div className="rounded-lg border bg-card p-4 text-card-foreground shadow-sm">
+        <p className="text-muted-foreground">Welcome to Keroma.</p>
+      </div>
+    </div>
+  )
+}

frontend/src/app/platform/ProjectsPage.tsx

@@ -47,7 +47,12 @@ import {
   LayoutGrid,
   List,
   Network,
+  ArrowUpDown,
+  ArrowUp,
+  ArrowDown,
+  X,
 } from 'lucide-react'
+import { Checkbox } from '@/components/ui/checkbox'
 import { usePlatform } from './platformContext'
 import { getProjectIcon } from '../../lib/iconMap'
 import {
@@ -205,6 +210,8 @@ export function ProjectsPage() {
   const [renameValue, setRenameValue] = useState('')
   const renameInputRef = React.useRef<HTMLInputElement>(null)
   const [deleteTarget, setDeleteTarget] = useState<Project | null>(null)
+  const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set())
+  const [bulkDeleteTargets, setBulkDeleteTargets] = useState<Project[] | null>(null)
 
   const filtered = useMemo(() => {
     const q = search.trim().toLowerCase()
@@ -319,6 +326,78 @@ export function ProjectsPage() {
     [createProject, navigate]
   )
 
+  const allOnPageSelected = pageItems.length > 0 && pageItems.every((p) => selectedIds.has(p.id))
+  const someOnPageSelected = pageItems.some((p) => selectedIds.has(p.id))
+
+  const toggleSelection = useCallback((id: string) => {
+    setSelectedIds((prev) => {
+      const next = new Set(prev)
+      if (next.has(id)) next.delete(id)
+      else next.add(id)
+      return next
+    })
+  }, [])
+
+  const toggleSelectAll = useCallback(() => {
+    if (allOnPageSelected) {
+      setSelectedIds((prev) => {
+        const next = new Set(prev)
+        pageItems.forEach((p) => next.delete(p.id))
+        return next
+      })
+    } else {
+      setSelectedIds((prev) => {
+        const next = new Set(prev)
+        pageItems.forEach((p) => next.add(p.id))
+        return next
+      })
+    }
+  }, [allOnPageSelected, pageItems])
+
+  const clearSelection = useCallback(() => setSelectedIds(new Set()), [])
+
+  const handleBulkDeleteOpen = useCallback(() => {
+    const toDelete = sorted.filter((p) => selectedIds.has(p.id))
+    if (toDelete.length > 0) setBulkDeleteTargets(toDelete)
+  }, [sorted, selectedIds])
+
+  const handleBulkDeleteConfirm = useCallback(() => {
+    if (!bulkDeleteTargets || bulkDeleteTargets.length === 0) return
+    const count = bulkDeleteTargets.length
+    bulkDeleteTargets.forEach((project) => {
+      removeGraphFromStorage(project.id)
+      deleteProject(project.id)
+    })
+    setBulkDeleteTargets(null)
+    setSelectedIds(new Set())
+    navigate('/projects', { replace: true })
+    toast(`${count} project${count === 1 ? '' : 's'} deleted`)
+  }, [bulkDeleteTargets, deleteProject, navigate])
+
+  const handleBulkExport = useCallback(() => {
+    const toExport = sorted.filter((p) => selectedIds.has(p.id))
+    toExport.forEach((project) => {
+      const stored = loadGraphFromStorage(project.id)
+      const state = stored
+        ? { version: PROJECT_VERSION, nodes: stored.nodes, edges: stored.edges }
+        : { version: PROJECT_VERSION, nodes: [], edges: [] }
+      const blob = new Blob([JSON.stringify(state, null, 2)], { type: 'application/json' })
+      const url = URL.createObjectURL(blob)
+      const a = document.createElement('a')
+      const filename = `${project.name.replace(/[^\w.-]/g, '_')}${PROJECT_FILE_EXT}`
+      a.href = url
+      a.download = filename
+      a.click()
+      URL.revokeObjectURL(url)
+    })
+    toast.success(`Exported ${toExport.length} project${toExport.length === 1 ? '' : 's'}`)
+  }, [sorted, selectedIds])
+
+  const SortIcon = ({ columnKey }: { columnKey: SortKey }) => {
+    if (sortKey !== columnKey) return <ArrowUpDown className="size-3.5 opacity-50" />
+    return sortDir === 'asc' ? <ArrowUp className="size-3.5" /> : <ArrowDown className="size-3.5" />
+  }
+
   return (
     <div className="relative flex flex-1 flex-col min-h-0">
       <ProjectsPageBackground className="absolute inset-0 pointer-events-none" />
@@ -330,8 +409,8 @@ export function ProjectsPage() {
           </h1>
         </div>
         <div className="flex flex-col gap-4 rounded-lg border bg-card p-4 text-card-foreground shadow-sm">
-          <div className="grid w-full grid-cols-1 gap-3 sm:grid-cols-3 sm:items-center">
-            <div className="relative w-64 shrink-0 sm:justify-self-start">
+          <div className="flex flex-wrap items-center gap-3">
+            <div className="relative w-64 shrink-0">
               <Search className="absolute left-2.5 top-1/2 size-4 -translate-y-1/2 text-muted-foreground pointer-events-none" />
               <Input
                 placeholder="Search projects"
@@ -344,27 +423,7 @@ export function ProjectsPage() {
                 aria-label="Search projects by name"
               />
             </div>
-            <div className="flex justify-self-start sm:justify-self-center">
-              <ToggleGroup
-                type="single"
-                value={viewMode}
-                onValueChange={(v) => v && setViewMode(v as ViewMode)}
-                aria-label="View mode"
-                variant="outline"
-                size="sm"
-                className="gap-0 rounded-md p-0.5 [&>button]:rounded-none [&>button:first-child]:rounded-l-md [&>button:last-child]:rounded-r-md [&>button:not(:first-child)]:border-l-0"
-              >
-                <ToggleGroupItem value="cards" aria-label="Cards view" className="gap-1.5 px-2.5">
-                  <LayoutGrid className="size-3.5" />
-                  Cards
-                </ToggleGroupItem>
-                <ToggleGroupItem value="table" aria-label="Table view" className="gap-1.5 px-2.5">
-                  <List className="size-3.5" />
-                  Table
-                </ToggleGroupItem>
-              </ToggleGroup>
-            </div>
-            <div className="flex h-9 items-center gap-2 sm:justify-self-end">
+            <div className="ml-auto flex h-9 items-center gap-2">
               <Select
                 value={pageSize === -1 ? 'all' : String(pageSize)}
                 onValueChange={(v) => {
@@ -384,6 +443,22 @@ export function ProjectsPage() {
                   <SelectItem value="all">All</SelectItem>
                 </SelectContent>
               </Select>
+              <ToggleGroup
+                type="single"
+                value={viewMode}
+                onValueChange={(v) => v && setViewMode(v as ViewMode)}
+                aria-label="View mode"
+                variant="outline"
+                size="sm"
+                className="gap-0 rounded-md p-0.5 [&>button]:rounded-none [&>button:first-child]:rounded-l-md [&>button:last-child]:rounded-r-md [&>button:not(:first-child)]:border-l-0"
+              >
+                <ToggleGroupItem value="cards" aria-label="Cards view" className="px-2.5">
+                  <LayoutGrid className="size-4" />
+                </ToggleGroupItem>
+                <ToggleGroupItem value="table" aria-label="Table view" className="px-2.5">
+                  <List className="size-4" />
+                </ToggleGroupItem>
+              </ToggleGroup>
             </div>
           </div>
 
@@ -420,45 +495,75 @@ export function ProjectsPage() {
             </div>
           ) : viewMode === 'table' ? (
             <>
-              <div className="overflow-auto">
+              <div className="overflow-auto rounded-md border">
+                {(selectedIds.size > 0) && (
+                  <div className="flex flex-wrap items-center gap-2 border-b bg-muted/60 px-3 py-2">
+                    <span className="text-sm font-medium tabular-nums">
+                      {selectedIds.size} selected
+                    </span>
+                    <div className="flex items-center gap-1">
+                      <Button variant="outline" size="sm" onClick={handleBulkExport} className="h-8 gap-1.5 px-2.5">
+                        <Download className="size-3.5" />
+                        Export
+                      </Button>
+                      <Button variant="outline" size="sm" className="h-8 gap-1.5 px-2.5 text-destructive hover:text-destructive" onClick={handleBulkDeleteOpen}>
+                        <Trash2 className="size-3.5" />
+                        Delete
+                      </Button>
+                    </div>
+                    <Button variant="ghost" size="sm" onClick={clearSelection} className="ml-auto h-8 gap-1.5 px-2.5">
+                      <X className="size-3.5" />
+                      Clear
+                    </Button>
+                  </div>
+                )}
                 <Table className="table-fixed">
                   <TableHeader className="sticky top-0 z-10 bg-card">
                     <TableRow className="hover:bg-transparent border-b h-8">
+                      <TableHead className="w-10 px-2 py-1.5 text-xs [&:has([role=checkbox])]:pr-0">
+                        <Checkbox
+                          checked={pageItems.length === 0 ? false : allOnPageSelected ? true : someOnPageSelected ? 'indeterminate' : false}
+                          onCheckedChange={() => toggleSelectAll()}
+                          aria-label="Select all on page"
+                        />
+                      </TableHead>
                       <TableHead className="w-[35%] min-w-[100px] h-8 px-2 py-1.5 text-xs">
                         <button
                           type="button"
-                          className="flex items-center font-medium hover:underline"
+                          className="flex items-center gap-1 font-medium hover:underline"
                           onClick={() => handleSort('name')}
                           aria-sort={sortKey === 'name' ? (sortDir === 'asc' ? 'ascending' : 'descending') : undefined}
                         >
                           Name
-                          {sortKey === 'name' && (sortDir === 'asc' ? ' ↑' : ' ↓')}
+                          <SortIcon columnKey="name" />
                         </button>
                       </TableHead>
                       <TableHead className="hidden sm:table-cell w-[120px] min-w-[100px] h-8 px-2 py-1.5 text-xs">
                         <button
                           type="button"
-                          className="font-medium hover:underline"
+                          className="flex items-center gap-1 font-medium hover:underline"
                           onClick={() => handleSort('created')}
                           aria-sort={sortKey === 'created' ? (sortDir === 'asc' ? 'ascending' : 'descending') : undefined}
                         >
                           Created
-                          {sortKey === 'created' && (sortDir === 'asc' ? ' ↑' : ' ↓')}
+                          <SortIcon columnKey="created" />
                         </button>
                       </TableHead>
                       <TableHead className="hidden md:table-cell w-[100px] min-w-[80px] h-8 px-2 py-1.5 text-xs">Size</TableHead>
                       <TableHead className="w-[115px] min-w-[90px] h-8 px-2 py-1.5 text-xs">
                         <button
                           type="button"
-                          className="font-medium hover:underline"
+                          className="flex items-center gap-1 font-medium hover:underline"
                           onClick={() => handleSort('lastEdited')}
                           aria-sort={sortKey === 'lastEdited' ? (sortDir === 'asc' ? 'ascending' : 'descending') : undefined}
                         >
                           Last edited
-                          {sortKey === 'lastEdited' && (sortDir === 'asc' ? ' ↑' : ' ↓')}
+                          <SortIcon columnKey="lastEdited" />
                         </button>
                       </TableHead>
-                      <TableHead className="sticky right-0 z-10 w-[52px] min-w-[52px] bg-card h-8 px-1 py-1.5 text-xs" />
+                      <TableHead className="sticky right-0 z-10 w-[140px] min-w-[140px] bg-card h-8 px-2 py-1.5 text-xs font-medium">
+                        Actions
+                      </TableHead>
                     </TableRow>
                   </TableHeader>
                   <TableBody className="text-xs">
@@ -466,10 +571,11 @@ export function ProjectsPage() {
                       const Icon = getProjectIcon(project.iconId)
                       const counts = getGraphCounts(project.id)
                       const lastEdited = project.lastEditedAt ?? project.createdAt
+                      const isSelected = selectedIds.has(project.id)
                       return (
                         <TableRow
                           key={project.id}
-                          className="cursor-pointer hover:bg-muted/50 h-8"
+                          className={`group cursor-pointer hover:bg-muted/50 h-8 ${isSelected ? 'bg-muted/70' : ''}`}
                           onClick={() => handleOpen(project.id)}
                           onKeyDown={(e) => {
                             if (e.key === 'Enter' || e.key === ' ') {
@@ -481,6 +587,13 @@ export function ProjectsPage() {
                           role="button"
                           aria-label={`Open ${project.name}`}
                         >
+                          <TableCell className="px-2 py-1.5 w-10 [&:has([role=checkbox])]:pr-0" onClick={(e) => e.stopPropagation()}>
+                            <Checkbox
+                              checked={isSelected}
+                              onCheckedChange={() => toggleSelection(project.id)}
+                              aria-label={`Select ${project.name}`}
+                            />
+                          </TableCell>
                           <TableCell className="px-2 py-1.5 min-w-0">
                             <div className="flex items-center gap-1.5 min-w-0">
                               <Icon className="size-3.5 shrink-0 text-muted-foreground" />
@@ -504,42 +617,67 @@ export function ProjectsPage() {
                             </Tooltip>
                           </TableCell>
                           <TableCell
-                            className="sticky right-0 bg-card w-[52px] min-w-[52px] px-1 py-1.5"
+                            className={`sticky right-0 w-[140px] min-w-[140px] px-2 py-1.5 ${isSelected ? 'bg-muted/70' : 'bg-card group-hover:bg-muted/50'}`}
                             onClick={(e) => e.stopPropagation()}
                           >
-                            <DropdownMenu>
-                              <DropdownMenuTrigger asChild>
-                                <Button
-                                  variant="ghost"
-                                  size="icon"
-                                  className="size-7"
-                                  aria-label={`Actions for ${project.name}`}
-                                >
-                                  <MoreHorizontal className="size-4" />
-                                </Button>
-                              </DropdownMenuTrigger>
-                              <DropdownMenuContent align="end">
-                                <DropdownMenuItem onClick={() => handleOpen(project.id)}>
-                                  <FolderOpen className="size-4" />
-                                  Open
-                                </DropdownMenuItem>
-                                <DropdownMenuItem onClick={() => handleRenameOpen(project)}>
-                                  <Pencil className="size-4" />
-                                  Rename
-                                </DropdownMenuItem>
-                                <DropdownMenuItem onClick={() => handleExport(project)}>
-                                  <Download className="size-4" />
-                                  Export
-                                </DropdownMenuItem>
-                                <DropdownMenuItem
-                                  className="text-destructive focus:text-destructive"
-                                  onClick={() => handleDeleteOpen(project)}
-                                >
-                                  <Trash2 className="size-4" />
-                                  Delete
-                                </DropdownMenuItem>
-                              </DropdownMenuContent>
-                            </DropdownMenu>
+                            <div className="flex items-center justify-end gap-0.5">
+                              <Tooltip>
+                                <TooltipTrigger asChild>
+                                  <Button
+                                    variant="ghost"
+                                    size="icon"
+                                    className="size-7 text-muted-foreground hover:text-foreground"
+                                    aria-label={`Open ${project.name}`}
+                                    onClick={() => handleOpen(project.id)}
+                                  >
+                                    <FolderOpen className="size-3.5" />
+                                  </Button>
+                                </TooltipTrigger>
+                                <TooltipContent>Open</TooltipContent>
+                              </Tooltip>
+                              <Tooltip>
+                                <TooltipTrigger asChild>
+                                  <Button
+                                    variant="ghost"
+                                    size="icon"
+                                    className="size-7 text-muted-foreground hover:text-foreground"
+                                    aria-label={`Rename ${project.name}`}
+                                    onClick={() => handleRenameOpen(project)}
+                                  >
+                                    <Pencil className="size-3.5" />
+                                  </Button>
+                                </TooltipTrigger>
+                                <TooltipContent>Rename</TooltipContent>
+                              </Tooltip>
+                              <Tooltip>
+                                <TooltipTrigger asChild>
+                                  <Button
+                                    variant="ghost"
+                                    size="icon"
+                                    className="size-7 text-muted-foreground hover:text-foreground"
+                                    aria-label={`Export ${project.name}`}
+                                    onClick={() => handleExport(project)}
+                                  >
+                                    <Download className="size-3.5" />
+                                  </Button>
+                                </TooltipTrigger>
+                                <TooltipContent>Export</TooltipContent>
+                              </Tooltip>
+                              <Tooltip>
+                                <TooltipTrigger asChild>
+                                  <Button
+                                    variant="ghost"
+                                    size="icon"
+                                    className="size-7 text-muted-foreground hover:text-destructive"
+                                    aria-label={`Delete ${project.name}`}
+                                    onClick={() => handleDeleteOpen(project)}
+                                  >
+                                    <Trash2 className="size-3.5" />
+                                  </Button>
+                                </TooltipTrigger>
+                                <TooltipContent>Delete</TooltipContent>
+                              </Tooltip>
+                            </div>
                           </TableCell>
                         </TableRow>
                       )
@@ -803,6 +941,26 @@ export function ProjectsPage() {
             </DialogFooter>
           </DialogContent>
         </Dialog>
+
+        {/* Bulk delete confirmation */}
+        <Dialog open={bulkDeleteTargets !== null && bulkDeleteTargets.length > 0} onOpenChange={(open) => !open && setBulkDeleteTargets(null)}>
+          <DialogContent>
+            <DialogHeader>
+              <DialogTitle>Delete {bulkDeleteTargets?.length ?? 0} projects</DialogTitle>
+              <DialogDescription>
+                Are you sure you want to delete these projects? This cannot be undone.
+              </DialogDescription>
+            </DialogHeader>
+            <DialogFooter>
+              <Button variant="outline" onClick={() => setBulkDeleteTargets(null)}>
+                Cancel
+              </Button>
+              <Button variant="destructive" onClick={handleBulkDeleteConfirm}>
+                Delete all
+              </Button>
+            </DialogFooter>
+          </DialogContent>
+        </Dialog>
       </TooltipProvider>
       </div>
     </div>

frontend/src/components/ui/checkbox.tsx

@@ -0,0 +1,40 @@
+import * as React from 'react'
+import { Check, Minus } from 'lucide-react'
+import { cn } from '@/lib/utils'
+
+export interface CheckboxProps extends Omit<React.ButtonHTMLAttributes<HTMLButtonElement>, 'onChange'> {
+  checked?: boolean | 'indeterminate'
+  onCheckedChange?: (checked: boolean) => void
+}
+
+const Checkbox = React.forwardRef<HTMLButtonElement, CheckboxProps>(
+  ({ className, checked, onCheckedChange, disabled, ...props }, ref) => {
+    const isChecked = checked === true
+    const isIndeterminate = checked === 'indeterminate'
+    return (
+      <button
+        type="button"
+        role="checkbox"
+        ref={ref}
+        aria-checked={isIndeterminate ? 'mixed' : isChecked}
+        disabled={disabled}
+        className={cn(
+          'peer inline-flex h-4 w-4 shrink-0 items-center justify-center rounded border border-primary shadow focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50',
+          isChecked || isIndeterminate ? 'bg-primary text-primary-foreground' : 'bg-background',
+          className
+        )}
+        onClick={(e) => {
+          e.stopPropagation()
+          if (disabled) return
+          onCheckedChange?.(!isChecked)
+        }}
+        {...props}
+      >
+        {isIndeterminate ? <Minus className="size-2.5" /> : isChecked ? <Check className="size-2.5" /> : null}
+      </button>
+    )
+  }
+)
+Checkbox.displayName = 'Checkbox'
+
+export { Checkbox }

frontend/src/main.tsx

@@ -6,6 +6,7 @@ import { ThemeProvider } from './lib/themeContext'
 import { registerBuiltinNodes } from './lib/registerBuiltinNodes'
 import { PlatformPage } from './app/platform/PlatformPage'
 import { ProjectsPage } from './app/platform/ProjectsPage'
+import { KeromaPage } from './app/platform/KeromaPage'
 import { CanvasRoute } from './app/platform/CanvasRoute'
 import './styles.css'
 import '@xyflow/react/dist/style.css'
@@ -21,6 +22,7 @@ createRoot(document.getElementById('root')!).render(
             <Route index element={<Navigate to="/projects" replace />} />
             <Route path="projects" element={<ProjectsPage />} />
             <Route path="projects/:projectId" element={<CanvasRoute />} />
+            <Route path="keroma" element={<KeromaPage />} />
           </Route>
         </Routes>
       </BrowserRouter>