feat(frontend): Implement Phase 2 - Complete Projects UI with CRUD operations

Implemented comprehensive Projects UI with full CRUD functionality following
modern React best practices and using shadcn/ui components.

Changes:
- Created ProjectForm component with react-hook-form + zod validation
  - Auto-uppercase project key input
  - Comprehensive field validation (name, key, description)
  - Support for both create and edit modes
  - Toast notifications for success/error states

- Enhanced Projects List Page (app/(dashboard)/projects/page.tsx)
  - Beautiful card-based grid layout with hover effects
  - Skeleton loading states for better UX
  - Empty state with call-to-action
  - Project metadata display (key badge, created date)
  - Integrated ProjectForm in Dialog for creation

- Enhanced Project Detail Page (app/(dashboard)/projects/[id]/page.tsx)
  - Comprehensive project information display
  - Edit functionality with dialog form
  - Delete functionality with confirmation AlertDialog
  - Epics preview section with stats
  - Quick actions sidebar (Kanban, Epics)
  - Statistics card (Total/Active/Completed epics)
  - Skeleton loading states
  - Error handling with retry capability

- Added toast notifications (Sonner)
  - Installed and configured sonner package
  - Added Toaster component to root layout
  - Success/error notifications for all CRUD operations

- Installed required dependencies
  - date-fns for date formatting
  - sonner for toast notifications
  - shadcn/ui alert-dialog component

Technical highlights:
- TypeScript with strict type checking
- React Query for data fetching and caching
- Optimistic updates with automatic rollback
- Responsive design (mobile-friendly)
- Accessibility-focused components
- Clean error handling throughout

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/(dashboard)/projects/page.tsx

@@ -2,69 +2,66 @@
 
 import { useState } from 'react';
 import Link from 'next/link';
-import { Plus, Loader2 } from 'lucide-react';
+import { Plus, FolderKanban, Calendar } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
+import { Badge } from '@/components/ui/badge';
+import { Skeleton } from '@/components/ui/skeleton';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
 import { useProjects } from '@/lib/hooks/use-projects';
-import { CreateProjectDialog } from '@/components/features/projects/CreateProjectDialog';
+import { ProjectForm } from '@/components/projects/project-form';
+import { formatDistanceToNow } from 'date-fns';
 
 export default function ProjectsPage() {
   const [isCreateDialogOpen, setIsCreateDialogOpen] = useState(false);
   const { data: projects, isLoading, error } = useProjects();
 
-  // Log state for debugging
-  console.log('[ProjectsPage] State:', {
-    isLoading,
-    error,
-    projects,
-    apiUrl: process.env.NEXT_PUBLIC_API_URL,
-  });
-
   if (isLoading) {
     return (
-      <div className="flex h-[50vh] items-center justify-center">
-        <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
+      <div className="space-y-6">
+        <div className="flex items-center justify-between">
+          <div>
+            <Skeleton className="h-9 w-48" />
+            <Skeleton className="h-5 w-64 mt-2" />
+          </div>
+          <Skeleton className="h-10 w-32" />
+        </div>
+        <div className="grid gap-6 md:grid-cols-2 lg:grid-cols-3">
+          {Array.from({ length: 6 }).map((_, i) => (
+            <Card key={i}>
+              <CardHeader>
+                <Skeleton className="h-6 w-3/4" />
+                <Skeleton className="h-4 w-1/2 mt-2" />
+              </CardHeader>
+              <CardContent>
+                <Skeleton className="h-16 w-full" />
+                <Skeleton className="h-4 w-32 mt-4" />
+              </CardContent>
+            </Card>
+          ))}
+        </div>
       </div>
     );
   }
 
   if (error) {
-    const errorMessage = error instanceof Error ? error.message : 'Unknown error';
-    const apiUrl = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:5000/api/v1';
-
-    console.error('[ProjectsPage] Error loading projects:', error);
-
     return (
-      <div className="flex h-[50vh] items-center justify-center">
+      <div className="flex items-center justify-center min-h-[400px]">
         <Card className="w-full max-w-md">
           <CardHeader>
-            <CardTitle className="text-red-600">Failed to Load Projects</CardTitle>
-            <CardDescription>Unable to connect to the backend API</CardDescription>
+            <CardTitle className="text-destructive">Error Loading Projects</CardTitle>
+            <CardDescription>
+              {error instanceof Error ? error.message : 'Failed to load projects'}
+            </CardDescription>
           </CardHeader>
-          <CardContent className="space-y-4">
-            <div className="space-y-2">
-              <p className="text-sm font-medium">Error Details:</p>
-              <p className="text-sm text-muted-foreground">{errorMessage}</p>
-            </div>
-            <div className="space-y-2">
-              <p className="text-sm font-medium">API URL:</p>
-              <p className="text-sm font-mono text-muted-foreground">{apiUrl}</p>
-            </div>
-            <div className="space-y-2">
-              <p className="text-sm font-medium">Troubleshooting Steps:</p>
-              <ul className="list-disc list-inside text-sm text-muted-foreground space-y-1">
-                <li>Check if the backend server is running</li>
-                <li>Verify the API URL in .env.local</li>
-                <li>Check browser console (F12) for detailed errors</li>
-                <li>Check network tab (F12) for failed requests</li>
-              </ul>
-            </div>
-            <Button
-              onClick={() => window.location.reload()}
-              className="w-full"
-            >
-              Retry
-            </Button>
+          <CardContent>
+            <Button onClick={() => window.location.reload()}>Retry</Button>
           </CardContent>
         </Card>
       </div>
@@ -73,10 +70,11 @@ export default function ProjectsPage() {
 
   return (
     <div className="space-y-6">
+      {/* Header */}
       <div className="flex items-center justify-between">
         <div>
           <h1 className="text-3xl font-bold tracking-tight">Projects</h1>
-          <p className="text-muted-foreground">
+          <p className="text-muted-foreground mt-1">
             Manage your projects and track progress
           </p>
         </div>
@@ -86,51 +84,71 @@ export default function ProjectsPage() {
         </Button>
       </div>
 
-      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
-        {projects?.map((project) => (
-          <Link key={project.id} href={`/projects/${project.id}`}>
-            <Card className="transition-colors hover:bg-accent">
-              <CardHeader>
-                <div className="flex items-start justify-between">
-                  <div className="space-y-1">
-                    <CardTitle>{project.name}</CardTitle>
-                    <CardDescription>{project.key}</CardDescription>
+      {/* Projects Grid */}
+      {projects && projects.length > 0 ? (
+        <div className="grid gap-6 md:grid-cols-2 lg:grid-cols-3">
+          {projects.map((project) => (
+            <Link key={project.id} href={`/projects/${project.id}`}>
+              <Card className="h-full transition-all hover:shadow-lg hover:border-primary cursor-pointer">
+                <CardHeader>
+                  <div className="flex items-start justify-between">
+                    <div className="space-y-1 flex-1">
+                      <CardTitle className="line-clamp-1">{project.name}</CardTitle>
+                      <div className="flex items-center gap-2">
+                        <Badge variant="secondary">{project.key}</Badge>
+                      </div>
+                    </div>
+                    <FolderKanban className="h-5 w-5 text-muted-foreground flex-shrink-0 ml-2" />
                   </div>
-                  <span
-                    className={`rounded-full px-2 py-1 text-xs font-medium ${
-                      project.status === 'Active'
-                        ? 'bg-green-100 text-green-700'
-                        : 'bg-gray-100 text-gray-700'
-                    }`}
-                  >
-                    {project.status}
-                  </span>
-                </div>
-              </CardHeader>
-              <CardContent>
-                <p className="line-clamp-2 text-sm text-muted-foreground">
-                  {project.description}
-                </p>
-              </CardContent>
-            </Card>
-          </Link>
-        ))}
+                </CardHeader>
+                <CardContent className="space-y-4">
+                  {project.description ? (
+                    <p className="text-sm text-muted-foreground line-clamp-3">
+                      {project.description}
+                    </p>
+                  ) : (
+                    <p className="text-sm text-muted-foreground italic">
+                      No description
+                    </p>
+                  )}
+                  <div className="flex items-center text-xs text-muted-foreground">
+                    <Calendar className="mr-1 h-3 w-3" />
+                    Created {formatDistanceToNow(new Date(project.createdAt), { addSuffix: true })}
+                  </div>
+                </CardContent>
+              </Card>
+            </Link>
+          ))}
+        </div>
+      ) : (
+        <Card className="flex flex-col items-center justify-center py-16">
+          <FolderKanban className="h-12 w-12 text-muted-foreground mb-4" />
+          <CardTitle className="mb-2">No projects yet</CardTitle>
+          <CardDescription className="mb-4">
+            Get started by creating your first project
+          </CardDescription>
+          <Button onClick={() => setIsCreateDialogOpen(true)}>
+            <Plus className="mr-2 h-4 w-4" />
+            Create Project
+          </Button>
+        </Card>
+      )}
 
-        {!projects || projects.length === 0 ? (
-          <Card className="col-span-full">
-            <CardContent className="flex h-40 items-center justify-center">
-              <p className="text-sm text-muted-foreground">
-                No projects yet. Create your first project to get started.
-              </p>
-            </CardContent>
-          </Card>
-        ) : null}
-      </div>
-
-      <CreateProjectDialog
-        open={isCreateDialogOpen}
-        onOpenChange={setIsCreateDialogOpen}
-      />
+      {/* Create Project Dialog */}
+      <Dialog open={isCreateDialogOpen} onOpenChange={setIsCreateDialogOpen}>
+        <DialogContent className="max-w-2xl">
+          <DialogHeader>
+            <DialogTitle>Create New Project</DialogTitle>
+            <DialogDescription>
+              Add a new project to organize your work and track progress
+            </DialogDescription>
+          </DialogHeader>
+          <ProjectForm
+            onSuccess={() => setIsCreateDialogOpen(false)}
+            onCancel={() => setIsCreateDialogOpen(false)}
+          />
+        </DialogContent>
+      </Dialog>
     </div>
   );
 }