diff --git a/src/renderer/components/ai/AIChatPanel.tsx b/src/renderer/components/ai/AIChatPanel.tsx
index 9957b2f..bd06807 100644
--- a/src/renderer/components/ai/AIChatPanel.tsx
+++ b/src/renderer/components/ai/AIChatPanel.tsx
@@ -121,7 +121,6 @@ export function AIChatPanel({
     return () => observer.disconnect();
   }, [isStreaming, streamingEl]);
 
-
   // Auto-fire daily brief on home page
   useEffect(() => {
     if (!isHomePage || hasFiredBrief.current || hasTokenQuery.data !== true) return;
@@ -168,7 +167,6 @@ export function AIChatPanel({
     }
   };
 
-
   const hasMessages = messages.length > 0 || isStreaming;
 
   // Derived values for home page
@@ -195,12 +193,14 @@ export function AIChatPanel({
                 <div className="flex-1" />
                 <button
                   onClick={() => setBriefExpanded((v) => !v)}
+                  aria-label={briefExpanded ? 'Collapse brief' : 'Expand brief'}
                   className="flex h-6 w-6 items-center justify-center rounded-md text-muted-foreground transition-colors hover:text-foreground hover:bg-muted/60"
                 >
                   {briefExpanded ? <ChevronUp size={14} /> : <ChevronDown size={14} />}
                 </button>
                 <button
                   onClick={() => setBriefDismissed(true)}
+                  aria-label="Dismiss brief"
                   className="flex h-6 w-6 items-center justify-center rounded-md text-muted-foreground transition-colors hover:text-foreground hover:bg-muted/60"
                 >
                   <X size={14} />
@@ -210,7 +210,7 @@ export function AIChatPanel({
               {!briefExpanded && (
                 <div className="px-4 pb-3 -mt-1">
                   <p className="text-xs text-muted-foreground truncate">
-                    {dailyBrief.replace(/[#*_~`>\-]/g, '').slice(0, 120)}...
+                    {dailyBrief.replace(/[#*_~`>-]/g, '').slice(0, 120)}...
                   </p>
                 </div>
               )}
@@ -479,6 +479,7 @@ function ChatInput({
           onChange={(e) => onInputChange(e.target.value)}
           onKeyDown={onKeyDown}
           placeholder="Ask me anything..."
+          aria-label="Chat message"
           rows={1}
           className="flex-1 resize-none bg-transparent text-sm placeholder:text-muted-foreground outline-none max-h-[7.5rem] overflow-y-auto"
           style={{ fieldSizing: 'content' } as React.CSSProperties}
@@ -486,6 +487,7 @@ function ChatInput({
         <button
           onClick={onSend}
           disabled={!input.trim() || isStreaming}
+          aria-label="Send message"
           className="flex h-8 w-8 shrink-0 items-center justify-center rounded-lg bg-primary text-primary-foreground shadow-sm transition-all hover:bg-primary/90 active:scale-95 disabled:opacity-40 disabled:cursor-not-allowed disabled:active:scale-100"
         >
           <ArrowUp size={16} />
diff --git a/src/renderer/components/layout/AppShell.tsx b/src/renderer/components/layout/AppShell.tsx
index d1929a7..909cf81 100644
--- a/src/renderer/components/layout/AppShell.tsx
+++ b/src/renderer/components/layout/AppShell.tsx
@@ -35,8 +35,6 @@ import {
   DropdownMenu,
   DropdownMenuContent,
   DropdownMenuItem,
-  DropdownMenuLabel,
-  DropdownMenuSeparator,
   DropdownMenuPortal,
   DropdownMenuSub,
   DropdownMenuTrigger,
@@ -163,13 +161,13 @@ function AppShellInner({ children }: AppShellProps) {
           <p className="text-xs text-muted-foreground">
             Your token is stored securely in the OS keychain.
             {hasTokenQuery.data === true && (
-              <span className="text-green-600 ml-1">A token is currently stored.</span>
+              <span className="text-green-600 dark:text-green-400 ml-1">A token is currently stored.</span>
             )}
           </p>
         </div>
         <DialogFooter>
           {saved && (
-            <span className="flex items-center gap-1 text-sm text-green-600 mr-auto">
+            <span className="flex items-center gap-1 text-sm text-green-600 dark:text-green-400 mr-auto">
               <Check size={14} />
               Saved
             </span>
diff --git a/src/renderer/components/projects/ProjectDetail.tsx b/src/renderer/components/projects/ProjectDetail.tsx
index f52a2cb..c8dfa8c 100644
--- a/src/renderer/components/projects/ProjectDetail.tsx
+++ b/src/renderer/components/projects/ProjectDetail.tsx
@@ -4,6 +4,7 @@ import { format } from 'date-fns';
 import { useNavigate } from '@tanstack/react-router';
 import { trpc } from '@/lib/trpc';
 import { Button } from '@/components/ui/button';
+import { Skeleton } from '@/components/ui/skeleton';
 import { Item, ItemMedia, ItemContent, ItemTitle, ItemDescription } from '@/components/ui/item';
 import {
   Breadcrumb,
@@ -167,8 +168,17 @@ export function ProjectDetail({ projectId }: ProjectDetailProps) {
 
   if (isLoading) {
     return (
-      <div className="flex items-center justify-center h-full text-sm text-muted-foreground">
-        Loading project...
+      <div className="p-6 flex flex-col gap-6">
+        <div className="flex flex-col gap-1">
+          <Skeleton className="h-4 w-24" />
+          <Skeleton className="h-8 w-56" />
+        </div>
+        <div className="grid grid-cols-3 gap-4">
+          <Skeleton className="h-20 rounded-lg" />
+          <Skeleton className="h-20 rounded-lg" />
+          <Skeleton className="h-20 rounded-lg" />
+        </div>
+        <Skeleton className="h-16 rounded-lg" />
       </div>
     );
   }
diff --git a/src/renderer/components/projects/ProjectSidebar.tsx b/src/renderer/components/projects/ProjectSidebar.tsx
index 714c54b..0e4a606 100644
--- a/src/renderer/components/projects/ProjectSidebar.tsx
+++ b/src/renderer/components/projects/ProjectSidebar.tsx
@@ -322,7 +322,7 @@ export function ProjectSidebar({ selectedProjectId, onSelectProject }: ProjectSi
     if (editCreatingClient && editNewClientName.trim()) {
       // Create a new client
       const result = await createClientMutation.mutateAsync({ name: editNewClientName.trim() });
-      let parentId = result.id;
+      const parentId = result.id;
 
       if (editCreatingSubClient && editNewSubClientName.trim()) {
         // Also create a sub-client under the new client
diff --git a/src/renderer/components/tasks/PriorityBadge.tsx b/src/renderer/components/tasks/PriorityBadge.tsx
index 7ccde2a..c407319 100644
--- a/src/renderer/components/tasks/PriorityBadge.tsx
+++ b/src/renderer/components/tasks/PriorityBadge.tsx
@@ -4,21 +4,21 @@ export function PriorityBadge({ priority }: { priority: string | null }) {
   switch (priority) {
     case 'high':
       return (
-        <span className="inline-flex items-center gap-1 text-xs">
+        <span className="inline-flex items-center gap-1 text-xs text-red-600 dark:text-red-400">
           <ArrowUp className="h-3 w-3" />
           High
         </span>
       );
     case 'medium':
       return (
-        <span className="inline-flex items-center gap-1 text-xs">
+        <span className="inline-flex items-center gap-1 text-xs text-amber-600 dark:text-amber-400">
           <ArrowRight className="h-3 w-3" />
           Medium
         </span>
       );
     case 'low':
       return (
-        <span className="inline-flex items-center gap-1 text-xs">
+        <span className="inline-flex items-center gap-1 text-xs text-muted-foreground">
           <ArrowDown className="h-3 w-3" />
           Low
         </span>
diff --git a/src/renderer/components/tasks/TaskRow.tsx b/src/renderer/components/tasks/TaskRow.tsx
index f852c61..33ad4b7 100644
--- a/src/renderer/components/tasks/TaskRow.tsx
+++ b/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>
diff --git a/src/renderer/routes/tasks.tsx b/src/renderer/routes/tasks.tsx
index 9fdb87c..afdd363 100644
--- a/src/renderer/routes/tasks.tsx
+++ b/src/renderer/routes/tasks.tsx
@@ -4,7 +4,7 @@ import { useFloatingChat } from '@/context/FloatingChatContext';
 import {
   ClipboardCheck,
   ListTodo,
-  Loader2,
+  Clock,
   CheckCircle2,
   Plus,
   Search,
@@ -147,7 +147,7 @@ function TasksPage() {
         </Item>
         <Item variant="muted" className="bg-sky-50 dark:bg-sky-950/30">
           <ItemMedia variant="icon">
-            <Loader2 />
+            <Clock />
           </ItemMedia>
           <ItemContent>
             <ItemTitle>{stats.inProgress}</ItemTitle>
diff --git a/src/renderer/routes/timeline.tsx b/src/renderer/routes/timeline.tsx
index d7e4ac1..cf80bfc 100644
--- a/src/renderer/routes/timeline.tsx
+++ b/src/renderer/routes/timeline.tsx
@@ -1,12 +1,13 @@
 import { createFileRoute } from '@tanstack/react-router';
 import { useEffect, useRef, useState, useMemo } from 'react';
-import { Plus } from 'lucide-react';
+import { Plus, ChartGantt } from 'lucide-react';
 import { useFloatingChat } from '@/context/FloatingChatContext';
 import { trpc } from '@/lib/trpc';
 import { Button } from '@/components/ui/button';
 import { GanttChart, type GanttCheckpoint } from '@/components/timeline/GanttChart';
 import { AddCheckpointDialog } from '@/components/timeline/AddCheckpointDialog';
 import { EditCheckpointDialog } from '@/components/timeline/EditCheckpointDialog';
+import { Empty, EmptyHeader, EmptyMedia, EmptyTitle, EmptyDescription } from '@/components/ui/empty';
 
 export const Route = createFileRoute('/timeline')({
   component: TimelinePage,
@@ -107,9 +108,17 @@ function TimelinePage() {
 
       {/* Gantt Chart */}
       {ganttCheckpoints.length === 0 ? (
-        <div className="text-center text-muted-foreground text-sm py-12 border rounded-md bg-muted/30">
-          No checkpoints yet. Click "+ Add" to create your first milestone.
-        </div>
+        <Empty>
+          <EmptyHeader>
+            <EmptyMedia variant="icon">
+              <ChartGantt />
+            </EmptyMedia>
+            <EmptyTitle>No milestones yet</EmptyTitle>
+            <EmptyDescription>
+              Click "+ Add" to create your first project checkpoint.
+            </EmptyDescription>
+          </EmptyHeader>
+        </Empty>
       ) : (
         <div className="border rounded-md p-4 bg-card">
           <GanttChart