feat(AIChatPanel): add aria-labels for accessibility; clean up unused lines

feat(AppShell): improve token storage message styling for better visibility
feat(ProjectDetail): implement skeleton loading state for project details
fix(ProjectSidebar): refactor variable declaration for clarity
style(PriorityBadge): enhance priority badge colors for better contrast
refactor(TaskRow): simplify className handling with utility function
fix(TasksPage): replace loader icon with clock icon for in-progress tasks
feat(TimelinePage): enhance empty state with descriptive messaging and icon

src/renderer/components/tasks/TaskRow.tsx

@@ -1,5 +1,7 @@
+import { Fragment } from 'react';
 import { motion } from 'framer-motion';
 import { Calendar, User, Pencil, Trash2 } from 'lucide-react';
+import { cn } from '@/lib/utils';
 import { Checkbox } from '@/components/ui/checkbox';
 import { Badge } from '@/components/ui/badge';
 import {
@@ -95,9 +97,13 @@ export function TaskRow({
       <ContextMenuTrigger asChild>
         <Wrapper
           {...wrapperProps}
-          className={`flex flex-col gap-1.5 px-4 py-3 rounded-md border select-none transition-colors ${
-            isDone ? 'bg-green-50 dark:bg-green-950/30 border-green-200 dark:border-green-900' : 'bg-card border-border'
-          } ${onClick ? 'cursor-pointer hover:bg-accent/50' : 'cursor-default'}`}
+          className={cn(
+            'flex flex-col gap-1.5 px-4 py-3 rounded-md border select-none transition-colors',
+            isDone
+              ? 'bg-green-50 dark:bg-green-950/30 border-green-200 dark:border-green-900'
+              : 'bg-card border-border',
+            onClick ? 'cursor-pointer hover:bg-accent/50' : 'cursor-default',
+          )}
           onClick={() => onClick?.(task)}
         >
           {/* Row 1: checkbox + title + description */}
@@ -109,7 +115,7 @@ export function TaskRow({
               className="mt-0.5 shrink-0"
             />
             <div className="flex-1 min-w-0">
-              <div className={`text-sm font-semibold ${isDone ? 'line-through text-muted-foreground' : ''}`}>
+              <div className={cn('text-sm font-medium', isDone && 'line-through text-muted-foreground')}>
                 {task.title}
               </div>
               {task.description && (
@@ -136,10 +142,12 @@ export function TaskRow({
                 <Breadcrumb className="shrink-0">
                   <BreadcrumbList>
                     {breadcrumb.map((part, i) => (
-                      <BreadcrumbItem key={i}>
+                      <Fragment key={i}>
                         {i > 0 && <BreadcrumbSeparator />}
-                        <span className="text-xs">{part}</span>
-                      </BreadcrumbItem>
+                        <BreadcrumbItem>
+                          <span className="text-xs">{part}</span>
+                        </BreadcrumbItem>
+                      </Fragment>
                     ))}
                   </BreadcrumbList>
                 </Breadcrumb>