commit 37d89b13b95db427767bb02a10829c1b1d905dbe
Author: M1ngdaXie <156019134+M1ngdaXie@users.noreply.github.com>
Date:   Mon Dec 29 16:29:24 2025 -0800

    first commit

diff --git a/.env.example b/.env.example
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--- /dev/null
+++ b/.env.example
@@ -0,0 +1,8 @@
+# Docker Compose Environment Variables
+# Copy this file to .env and fill in your actual values
+# WARNING: Never commit the actual .env file to version control
+
+# PostgreSQL Configuration
+POSTGRES_USER=collab
+POSTGRES_PASSWORD=your_secure_password_here
+POSTGRES_DB=collaboration
diff --git a/.gitignore b/.gitignore
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index 0000000..f3dc83e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,31 @@
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# AI assistant instructions (keep private)
+CLAUDE.md
+
+# IDE and editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# OS-specific files
+Thumbs.db
+*.log
+
+# Dependencies
+node_modules/
+
+# Build artifacts
+dist/
+dist-ssr/
+build/
+*.local
+
+# Docker volumes and data
+postgres_data/
diff --git a/README.md b/README.md
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index 0000000..88a6921
--- /dev/null
+++ b/README.md
@@ -0,0 +1,241 @@
+# Real-Time Collaboration Platform
+
+A full-stack real-time collaborative application supporting both text editing and Kanban boards, built with React and Go. The system uses Yjs CRDTs for conflict-free synchronization and WebSockets for real-time updates.
+
+## Features
+
+- **Collaborative Text Editor**: Real-time document editing with TipTap editor
+- **Collaborative Kanban Boards**: Drag-and-drop task management
+- **Real-Time Synchronization**: Instant updates across all connected clients
+- **Offline Support**: IndexedDB persistence for offline editing
+- **User Presence**: See who's currently editing with live cursors and awareness
+
+## Tech Stack
+
+### Frontend
+- React 19 + TypeScript
+- Vite (build tool)
+- TipTap (collaborative rich text editor)
+- Yjs (CRDT for conflict-free replication)
+- y-websocket (WebSocket sync provider)
+- y-indexeddb (offline persistence)
+
+### Backend
+- Go 1.25
+- Gin (web framework)
+- Gorilla WebSocket
+- PostgreSQL 16 (document storage)
+- Redis 7 (future use)
+
+### Infrastructure
+- Docker Compose
+- PostgreSQL
+- Redis
+
+## Getting Started
+
+### Prerequisites
+
+- Node.js 18+ and npm
+- Go 1.25+
+- Docker and Docker Compose
+
+### Installation
+
+1. **Clone the repository**
+```bash
+git clone <your-repo-url>
+cd realtime-collab
+```
+
+2. **Set up environment variables**
+
+Create backend environment file:
+```bash
+cp backend/.env.example backend/.env
+# Edit backend/.env with your configuration
+```
+
+Create frontend environment file:
+```bash
+cp frontend/.env.example frontend/.env
+# Edit frontend/.env with your configuration (optional for local development)
+```
+
+Create root environment file for Docker:
+```bash
+cp .env.example .env
+# Edit .env with your Docker database credentials
+```
+
+3. **Start the infrastructure**
+```bash
+docker-compose up -d
+```
+
+This will start PostgreSQL and Redis containers.
+
+4. **Install and run the backend**
+```bash
+cd backend
+go mod download
+go run cmd/server/main.go
+```
+
+The backend server will start on `http://localhost:8080`
+
+5. **Install and run the frontend**
+```bash
+cd frontend
+npm install
+npm run dev
+```
+
+The frontend will start on `http://localhost:5173`
+
+6. **Access the application**
+
+Open your browser and navigate to `http://localhost:5173`
+
+## Environment Variables
+
+### Backend (backend/.env)
+
+```env
+PORT=8080
+DATABASE_URL=postgres://user:password@localhost:5432/collaboration?sslmode=disable
+REDIS_URL=redis://localhost:6379
+ALLOWED_ORIGINS=http://localhost:5173,http://localhost:3000
+```
+
+### Frontend (frontend/.env)
+
+```env
+VITE_API_URL=http://localhost:8080/api
+VITE_WS_URL=ws://localhost:8080/ws
+```
+
+### Docker Compose (.env)
+
+```env
+POSTGRES_USER=collab
+POSTGRES_PASSWORD=your_secure_password_here
+POSTGRES_DB=collaboration
+```
+
+## Architecture
+
+### Real-Time Collaboration Flow
+
+1. Client connects to WebSocket endpoint `/ws/:documentId`
+2. WebSocket handler creates a client and registers it with the Hub
+3. Hub manages rooms (one room per document)
+4. Yjs generates binary updates on document changes
+5. Client sends updates to WebSocket
+6. Hub broadcasts updates to all clients in the same room
+7. Yjs applies updates and merges changes automatically (CRDT)
+8. IndexedDB persists state locally for offline support
+
+### API Endpoints
+
+#### REST API
+- `GET /api/documents` - List all documents
+- `POST /api/documents` - Create a new document
+- `GET /api/documents/:id` - Get document metadata
+- `GET /api/documents/:id/state` - Get document Yjs state
+- `PUT /api/documents/:id/state` - Update document Yjs state
+- `DELETE /api/documents/:id` - Delete a document
+
+#### WebSocket
+- `GET /ws/:roomId` - WebSocket connection for real-time sync
+
+#### Health Check
+- `GET /health` - Server health status
+
+## Project Structure
+
+```
+realtime-collab/
+├── backend/
+│   ├── cmd/server/          # Application entry point
+│   ├── internal/
+│   │   ├── handlers/        # HTTP/WebSocket handlers
+│   │   ├── hub/             # WebSocket hub (room management)
+│   │   ├── models/          # Domain models
+│   │   └── store/           # Database layer
+│   └── scripts/             # Database initialization scripts
+├── frontend/
+│   ├── src/
+│   │   ├── api/             # REST API client
+│   │   ├── components/      # React components
+│   │   ├── lib/             # Yjs integration
+│   │   ├── pages/           # Page components
+│   │   └── hooks/           # Custom React hooks
+│   └── public/              # Static assets
+└── docker-compose.yml       # Infrastructure setup
+```
+
+## Development
+
+### Backend Commands
+```bash
+cd backend
+go run cmd/server/main.go  # Run development server
+go build -o server cmd/server/main.go  # Build binary
+go fmt ./...               # Format code
+```
+
+### Frontend Commands
+```bash
+cd frontend
+npm run dev      # Start dev server
+npm run build    # Production build
+npm run preview  # Preview production build
+npm run lint     # Run ESLint
+```
+
+### Database
+
+The database schema is automatically initialized on first run using `backend/scripts/init.sql`.
+
+To reset the database:
+```bash
+docker-compose down -v
+docker-compose up -d
+```
+
+## How It Works
+
+### Conflict-Free Replication (CRDT)
+
+The application uses Yjs, a CRDT implementation, which allows:
+- Multiple users to edit simultaneously without conflicts
+- Automatic merging of concurrent changes
+- Offline editing with eventual consistency
+- No need for operational transformation or locking
+
+### WebSocket Broadcasting
+
+The backend acts as a message broker:
+1. Receives binary Yjs updates from clients
+2. Broadcasts updates to all clients in the same room
+3. Does not interpret or modify the updates
+4. Yjs handles all conflict resolution on the client side
+
+## Contributing
+
+1. Fork the repository
+2. Create a feature branch (`git checkout -b feature/amazing-feature`)
+3. Commit your changes (`git commit -m 'Add amazing feature'`)
+4. Push to the branch (`git push origin feature/amazing-feature`)
+5. Open a Pull Request
+
+## License
+
+This project is licensed under the MIT License.
+
+## Acknowledgments
+
+- [Yjs](https://github.com/yjs/yjs) - CRDT framework
+- [TipTap](https://tiptap.dev/) - Rich text editor
+- [Gin](https://gin-gonic.com/) - Go web framework
diff --git a/backend/.env.example b/backend/.env.example
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index 0000000..9805822
--- /dev/null
+++ b/backend/.env.example
@@ -0,0 +1,13 @@
+# Server Configuration
+PORT=8080
+
+# Database Configuration
+# Format: postgres://username:password@host:port/database?sslmode=disable
+DATABASE_URL=postgres://collab:your_password_here@localhost:5432/collaboration?sslmode=disable
+
+# Redis Configuration
+REDIS_URL=redis://localhost:6379
+
+# CORS Configuration
+# Comma-separated list of allowed origins
+ALLOWED_ORIGINS=http://localhost:5173,http://localhost:3000
diff --git a/backend/.gitignore b/backend/.gitignore
new file mode 100644
index 0000000..92cfb6b
--- /dev/null
+++ b/backend/.gitignore
@@ -0,0 +1,31 @@
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Compiled binaries
+server
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binaries
+*.test
+
+# Go build artifacts
+*.out
+/bin/
+/pkg/
+
+# IDE and editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS-specific files
+.DS_Store
+Thumbs.db
diff --git a/backend/go.mod b/backend/go.mod
new file mode 100644
index 0000000..e43a4b4
--- /dev/null
+++ b/backend/go.mod
@@ -0,0 +1,43 @@
+module github.com/M1ngdaXie/realtime-collab
+
+go 1.25.3
+
+require (
+	github.com/bytedance/sonic v1.14.0 // indirect
+	github.com/bytedance/sonic/loader v0.3.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.9 // indirect
+	github.com/gin-contrib/cors v1.7.6 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/gin-gonic/gin v1.11.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.27.0 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/goccy/go-yaml v1.18.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/lib/pq v1.10.9 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/quic-go/qpack v0.5.1 // indirect
+	github.com/quic-go/quic-go v0.54.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.0 // indirect
+	go.uber.org/mock v0.5.0 // indirect
+	golang.org/x/arch v0.20.0 // indirect
+	golang.org/x/crypto v0.40.0 // indirect
+	golang.org/x/mod v0.25.0 // indirect
+	golang.org/x/net v0.42.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/text v0.27.0 // indirect
+	golang.org/x/tools v0.34.0 // indirect
+	google.golang.org/protobuf v1.36.9 // indirect
+)
diff --git a/backend/go.sum b/backend/go.sum
new file mode 100644
index 0000000..fad66b9
--- /dev/null
+++ b/backend/go.sum
@@ -0,0 +1,95 @@
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+github.com/bytedance/sonic v1.14.0/go.mod h1:WoEbx8WTcFJfzCe0hbmyTGrfjt8PzNEBdxlNUO24NhA=
+github.com/bytedance/sonic/loader v0.3.0 h1:dskwH8edlzNMctoruo8FPTJDF3vLtDT0sXZwvZJyqeA=
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+github.com/cloudwego/base64x v0.1.6 h1:t11wG9AECkCDk5fMSoxmufanudBtJ+/HemLstXDLI2M=
+github.com/cloudwego/base64x v0.1.6/go.mod h1:OFcloc187FXDaYHvrNIjxSe8ncn0OOM8gEHfghB2IPU=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
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+github.com/ugorji/go/codec v1.3.0/go.mod h1:pRBVtBSKl77K30Bv8R2P+cLSGaTtex6fsA2Wjqmfxj4=
+go.uber.org/mock v0.5.0 h1:KAMbZvZPyBPWgD14IrIQ38QCyjwpvVVV6K/bHl1IwQU=
+go.uber.org/mock v0.5.0/go.mod h1:ge71pBPLYDk7QIi1LupWxdAykm7KIEFchiOqd6z7qMM=
+golang.org/x/arch v0.20.0 h1:dx1zTU0MAE98U+TQ8BLl7XsJbgze2WnNKF/8tGp/Q6c=
+golang.org/x/arch v0.20.0/go.mod h1:bdwinDaKcfZUGpH09BB7ZmOfhalA8lQdzl62l8gGWsk=
+golang.org/x/crypto v0.40.0 h1:r4x+VvoG5Fm+eJcxMaY8CQM7Lb0l1lsmjGBQ6s8BfKM=
+golang.org/x/crypto v0.40.0/go.mod h1:Qr1vMER5WyS2dfPHAlsOj01wgLbsyWtFn/aY+5+ZdxY=
+golang.org/x/mod v0.25.0 h1:n7a+ZbQKQA/Ysbyb0/6IbB1H/X41mKgbhfv7AfG/44w=
+golang.org/x/mod v0.25.0/go.mod h1:IXM97Txy2VM4PJ3gI61r1YEk/gAj6zAHN3AdZt6S9Ww=
+golang.org/x/net v0.42.0 h1:jzkYrhi3YQWD6MLBJcsklgQsoAcw89EcZbJw8Z614hs=
+golang.org/x/net v0.42.0/go.mod h1:FF1RA5d3u7nAYA4z2TkclSCKh68eSXtiFwcWQpPXdt8=
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+golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
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+golang.org/x/text v0.27.0/go.mod h1:1D28KMCvyooCX9hBiosv5Tz/+YLxj0j7XhWjpSUF7CU=
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+golang.org/x/tools v0.34.0/go.mod h1:pAP9OwEaY1CAW3HOmg3hLZC5Z0CCmzjAF2UQMSqNARg=
+google.golang.org/protobuf v1.36.9 h1:w2gp2mA27hUeUzj9Ex9FBjsBm40zfaDtEWow293U7Iw=
+google.golang.org/protobuf v1.36.9/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/backend/internal/handlers/document.go b/backend/internal/handlers/document.go
new file mode 100644
index 0000000..212a508
--- /dev/null
+++ b/backend/internal/handlers/document.go
@@ -0,0 +1,144 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/M1ngdaXie/realtime-collab/internal/models"
+	"github.com/M1ngdaXie/realtime-collab/internal/store"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+)
+
+  type DocumentHandler struct {
+  	store *store.Store
+  }
+
+  func NewDocumentHandler(s *store.Store) *DocumentHandler {
+  	return &DocumentHandler{store: s}
+  }
+
+  // CreateDocument creates a new document
+  func (h *DocumentHandler) CreateDocument(c *gin.Context) {
+  	var req models.CreateDocumentRequest
+  	if err := c.ShouldBindJSON(&req); err != nil {
+  		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+  		return
+  	}
+
+  	// Validate document type
+  	if req.Type != models.DocumentTypeEditor && req.Type != models.DocumentTypeKanban {
+  		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid document type"})
+  		return
+  	}
+
+  	doc, err := h.store.CreateDocument(req.Name, req.Type)
+  	if err != nil {
+  		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+  		return
+  	}
+
+  	c.JSON(http.StatusCreated, doc)
+  }
+
+  // ListDocuments returns all documents
+  func (h *DocumentHandler) ListDocuments(c *gin.Context) {
+  	documents, err := h.store.ListDocuments()
+  	if err != nil {
+  		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+  		return
+  	}
+
+  	if documents == nil {
+  		documents = []models.Document{}
+  	}
+
+  	c.JSON(http.StatusOK, models.DocumentListResponse{
+  		Documents: documents,
+  		Total:     len(documents),
+  	})
+  }
+
+  // GetDocument returns a single document
+  func (h *DocumentHandler) GetDocument(c *gin.Context) {
+  	idStr := c.Param("id")
+  	id, err := uuid.Parse(idStr)
+  	if err != nil {
+  		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid document ID"})
+  		return
+  	}
+
+  	doc, err := h.store.GetDocument(id)
+  	if err != nil {
+  		c.JSON(http.StatusNotFound, gin.H{"error": "document not found"})
+  		return
+  	}
+
+  	c.JSON(http.StatusOK, doc)
+  }
+
+  // GetDocumentState returns the Yjs state for a document
+  func (h *DocumentHandler) GetDocumentState(c *gin.Context) {
+  	idStr := c.Param("id")
+  	id, err := uuid.Parse(idStr)
+  	if err != nil {
+  		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid document ID"})
+  		return
+  	}
+
+  	doc, err := h.store.GetDocument(id)
+  	if err != nil {
+  		c.JSON(http.StatusNotFound, gin.H{"error": "document not found"})
+  		return
+  	}
+
+  	// Return binary state
+  	if doc.YjsState == nil {
+  		c.Data(http.StatusOK, "application/octet-stream", []byte{})
+  		return
+  	}
+
+  	c.Data(http.StatusOK, "application/octet-stream", doc.YjsState)
+  }
+
+  // UpdateDocumentState updates the Yjs state for a document
+  func (h *DocumentHandler) UpdateDocumentState(c *gin.Context) {
+  	idStr := c.Param("id")
+  	id, err := uuid.Parse(idStr)
+  	if err != nil {
+  		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid document ID"})
+  		return
+  	}
+
+  	// Read binary body
+  	state, err := c.GetRawData()
+  	if err != nil {
+  		c.JSON(http.StatusBadRequest, gin.H{"error": "failed to read request body"})
+  		return
+  	}
+
+  	err = h.store.UpdateDocumentState(id, state)
+  	if err != nil {
+  		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+  		return
+  	}
+
+  	c.JSON(http.StatusOK, gin.H{"message": "state updated successfully"})
+  }
+
+  // DeleteDocument deletes a document
+  func (h *DocumentHandler) DeleteDocument(c *gin.Context) {
+  	idStr := c.Param("id")
+  	id, err := uuid.Parse(idStr)
+  	if err != nil {
+  		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid document ID"})
+  		return
+  	}
+
+  	err = h.store.DeleteDocument(id)
+  	if err != nil {
+  		c.JSON(http.StatusNotFound, gin.H{"error": "document not found"})
+  		return
+  	}
+
+  	c.JSON(http.StatusOK, gin.H{"message": "document deleted successfully"})
+  }
diff --git a/backend/internal/handlers/websocket.go b/backend/internal/handlers/websocket.go
new file mode 100644
index 0000000..d5ce33d
--- /dev/null
+++ b/backend/internal/handlers/websocket.go
@@ -0,0 +1,59 @@
+package handlers
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/M1ngdaXie/realtime-collab/internal/hub"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"github.com/gorilla/websocket"
+)
+
+
+var upgrader = websocket.Upgrader{
+  	ReadBufferSize:  1024,
+  	WriteBufferSize: 1024,
+  	CheckOrigin: func(r *http.Request) bool {
+  		// Allow all origins for development
+  		// TODO: Restrict in production
+  		return true
+  	},
+}
+
+ type WebSocketHandler struct {
+  	hub *hub.Hub
+  }
+
+  func NewWebSocketHandler(h *hub.Hub) *WebSocketHandler {
+  	return &WebSocketHandler{hub: h}
+  }
+
+  func (wsh *WebSocketHandler) HandleWebSocket(c *gin.Context){
+	roomID := c.Param("roomId")
+
+	if(roomID == ""){
+		c.JSON(http.StatusBadRequest, gin.H{"error": "roomId is required"})
+		return
+	}
+	conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to upgrade to WebSocket"})
+		return
+	}
+    
+		// Create a new client
+  	clientID := uuid.New().String()
+  	client := hub.NewClient(clientID, conn, wsh.hub, roomID)
+
+  	// Register client with hub
+  	wsh.hub.Register <- client
+
+  	// Start read and write pumps in separate goroutines
+  	go client.WritePump()
+  	go client.ReadPump()
+
+  	log.Printf("WebSocket connection established for client %s in room %s", clientID, roomID)
+  }
+
+  
diff --git a/backend/internal/hub/hub.go b/backend/internal/hub/hub.go
new file mode 100644
index 0000000..e9dee91
--- /dev/null
+++ b/backend/internal/hub/hub.go
@@ -0,0 +1,164 @@
+package hub
+
+import (
+	"log"
+	"sync"
+
+	"github.com/gorilla/websocket"
+)
+
+type Message struct {
+	RoomID  string
+	Data	[]byte
+	sender  *Client
+}
+
+type Client struct {
+	ID    string
+	Conn  *websocket.Conn
+	send chan []byte
+	hub    *Hub
+	roomID string
+}
+type Room struct {
+	ID 	string
+	clients map[*Client]bool
+	mu sync.RWMutex
+}
+
+type Hub struct {
+	rooms 	map[string]*Room
+	mu		sync.RWMutex
+	Register   chan *Client // Exported
+  	Unregister chan *Client // Exported
+  	Broadcast  chan *Message // Exported
+}
+func NewHub() *Hub {
+	return &Hub{
+		rooms:      make(map[string]*Room),
+		Register:   make(chan *Client),
+		Unregister: make(chan *Client),
+		Broadcast:  make(chan *Message),
+	}
+}
+
+func (h *Hub) Run() {
+	for {
+		select {
+		case client := <-h.Register:
+			h.registerClient(client)
+		case client := <-h.Unregister:
+			h.unregisterClient(client)
+		case message := <-h.Broadcast:
+			h.broadcastMessage(message)
+		}
+	}
+}
+
+func (h *Hub) registerClient(client *Client) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+
+	room, exists := h.rooms[client.roomID]
+	if !exists {
+		room = &Room{
+			ID:      client.roomID,
+			clients: make(map[*Client]bool),
+		}
+		h.rooms[client.roomID] = room
+		log.Printf("Created new room with ID: %s", client.roomID)
+	}
+	room.mu.Lock()
+	room.clients[client] = true
+	room.mu.Unlock()
+	log.Printf("Client %s joined room %s (total clients: %d)", client.ID, client.roomID, len(room.clients))
+}
+func (h *Hub) unregisterClient(client *Client) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+
+	room, exists := h.rooms[client.roomID]
+	if !exists {
+		log.Printf("Room %s does not exist for client %s", client.roomID, client.ID)
+		return
+	}
+	room.mu.Lock()
+	if _, ok := room.clients[client]; ok {
+		delete(room.clients, client)
+		close(client.send)
+		log.Printf("Client %s disconnected from room %s", client.ID, client.roomID)
+	}
+
+	room.mu.Unlock()
+	log.Printf("Client %s left room %s (total clients: %d)", client.ID, client.roomID, len(room.clients))
+
+	if len(room.clients) == 0 {
+		delete(h.rooms, client.roomID)
+		log.Printf("Deleted empty room with ID: %s", client.roomID)
+	}
+}
+func (h *Hub) broadcastMessage(message *Message) {
+	h.mu.RLock()
+	room, exists := h.rooms[message.RoomID]
+	h.mu.RUnlock()
+	if !exists {
+		log.Printf("Room %s does not exist for broadcasting", message.RoomID)
+		return
+	}
+
+	room.mu.RLock()
+	defer room.mu.RUnlock()
+	for client := range room.clients {
+		if client != message.sender {
+			select {
+			case client.send <- message.Data:
+			default:
+				log.Printf("Failed to send to client %s (channel full)", client.ID)
+			}
+		}
+	}
+}
+
+func (c *Client) ReadPump() {
+	defer func() {
+		c.hub.Unregister <- c
+		c.Conn.Close()
+	}()
+	for {
+		messageType, message, err := c.Conn.ReadMessage()
+		if err != nil {
+			log.Printf("Error reading message from client %s: %v", c.ID, err)
+			break
+		}
+		if messageType == websocket.BinaryMessage {
+			c.hub.Broadcast <- &Message{
+				RoomID: c.roomID,
+				Data:   message,
+				sender: c,
+			}
+		}
+	}
+}
+
+func (c *Client) WritePump() {
+	defer func() {
+		c.Conn.Close()
+	}()
+	for message := range c.send {
+		err := c.Conn.WriteMessage(websocket.BinaryMessage, message)
+		if err != nil {
+			log.Printf("Error writing message to client %s: %v", c.ID, err)
+			break
+		}
+	}
+}
+
+func NewClient(id string, conn *websocket.Conn, hub *Hub, roomID string) *Client {
+	return &Client{
+		ID:     id,
+		Conn:   conn,
+		send:   make(chan []byte, 256),
+		hub:    hub,
+		roomID: roomID,
+	}
+}
\ No newline at end of file
diff --git a/backend/internal/models/document.go b/backend/internal/models/document.go
new file mode 100644
index 0000000..7db851b
--- /dev/null
+++ b/backend/internal/models/document.go
@@ -0,0 +1,38 @@
+package models
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+)
+
+type DocumentType string
+
+const (
+	DocumentTypeEditor DocumentType = "editor"
+	DocumentTypeKanban DocumentType = "kanban"
+)
+
+type Document struct {
+		ID        uuid.UUID    `json:"id"`
+  	Name      string       `json:"name"`
+  	Type      DocumentType `json:"type"`
+  	YjsState  []byte       `json:"-"` // Don't expose binary data in JSON
+  	CreatedAt time.Time    `json:"created_at"`
+  	UpdatedAt time.Time    `json:"updated_at"`
+}
+
+type CreateDocumentRequest struct {
+  	Name string       `json:"name" binding:"required"`
+  	Type DocumentType `json:"type" binding:"required"`
+  }
+
+  type UpdateStateRequest struct {
+  	State []byte `json:"state" binding:"required"`
+  }
+
+  type DocumentListResponse struct {
+  	Documents []Document `json:"documents"`
+  	Total     int        `json:"total"`
+  }
+
diff --git a/backend/internal/store/postgres.go b/backend/internal/store/postgres.go
new file mode 100644
index 0000000..003112f
--- /dev/null
+++ b/backend/internal/store/postgres.go
@@ -0,0 +1,164 @@
+package store
+
+import (
+	"database/sql"
+	"fmt"
+	"time"
+
+	"github.com/M1ngdaXie/realtime-collab/internal/models"
+	"github.com/google/uuid"
+	_ "github.com/lib/pq" // PostgreSQL driver
+)
+
+type Store struct{
+	db *sql.DB
+}
+
+func NewStore(databaseUrl string) (*Store, error) {
+	db, error := sql.Open("postgres", databaseUrl)
+	if error != nil {
+		return nil, error
+	}
+	if err := db.Ping(); err != nil {
+  		return nil, fmt.Errorf("failed to ping database: %w", err)
+  	}
+	db.SetMaxOpenConns(25)
+  	db.SetMaxIdleConns(5)
+  	db.SetConnMaxLifetime(5 * time.Minute)
+	return &Store{db: db}, nil
+}
+
+func (s *Store) Close() error {
+  	return s.db.Close()
+  }
+
+func (s *Store) CreateDocument(name string, docType models.DocumentType) (*models.Document, error) {
+	doc := &models.Document{
+		ID:        uuid.New(),
+		Name:      name,
+		Type:      docType,
+		YjsState:  []byte{},
+		CreatedAt: time.Now(),
+		UpdatedAt: time.Now(),
+	}
+	query := `
+  		INSERT INTO documents (id, name, type, created_at, updated_at)
+  		VALUES ($1, $2, $3, $4, $5)
+  		RETURNING id, name, type, created_at, updated_at
+	`
+	err := s.db.QueryRow(query,
+		doc.ID, 
+		doc.Name, 
+		doc.Type, 
+		doc.CreatedAt, 
+		doc.UpdatedAt,
+
+	).Scan(&doc.ID, &doc.Name, &doc.Type, &doc.CreatedAt, &doc.UpdatedAt)
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to create document: %w", err)
+	}
+	return doc, nil
+}
+
+ // GetDocument retrieves a document by ID
+  func (s *Store) GetDocument(id uuid.UUID) (*models.Document, error) {
+  	doc := &models.Document{}
+
+  	query := `
+  		SELECT id, name, type, yjs_state, created_at, updated_at
+  		FROM documents
+  		WHERE id = $1
+  	`
+
+  	err := s.db.QueryRow(query, id).Scan(
+  		&doc.ID,
+  		&doc.Name,
+  		&doc.Type,
+  		&doc.YjsState,
+  		&doc.CreatedAt,
+  		&doc.UpdatedAt,
+  	)
+
+  	if err == sql.ErrNoRows {
+  		return nil, fmt.Errorf("document not found")
+  	}
+  	if err != nil {
+  		return nil, fmt.Errorf("failed to get document: %w", err)
+  	}
+
+  	return doc, nil
+  }
+
+
+ // ListDocuments retrieves all documents
+ func (s *Store) ListDocuments() ([]models.Document, error) {
+  	query := `
+  		SELECT id, name, type, created_at, updated_at
+  		FROM documents
+  		ORDER BY created_at DESC
+  	`
+
+  	rows, err := s.db.Query(query)
+  	if err != nil {
+  		return nil, fmt.Errorf("failed to list documents: %w", err)
+  	}
+  	defer rows.Close()
+
+  	var documents []models.Document
+  	for rows.Next() {
+  		var doc models.Document
+  		err := rows.Scan(&doc.ID, &doc.Name, &doc.Type, &doc.CreatedAt, &doc.UpdatedAt)
+  		if err != nil {
+  			return nil, fmt.Errorf("failed to scan document: %w", err)
+  		}
+  		documents = append(documents, doc)
+  	}
+
+  	return documents, nil
+  }
+
+ func (s *Store) UpdateDocumentState(id uuid.UUID, state []byte) error {
+  	query := `
+  		UPDATE documents
+  		SET yjs_state = $1, updated_at = $2
+  		WHERE id = $3
+  	`
+
+  	result, err := s.db.Exec(query, state, time.Now(), id)
+  	if err != nil {
+  		return fmt.Errorf("failed to update document state: %w", err)
+  	}
+
+  	rowsAffected, err := result.RowsAffected()
+  	if err != nil {
+  		return fmt.Errorf("failed to get rows affected: %w", err)
+  	}
+
+  	if rowsAffected == 0 {
+  		return fmt.Errorf("document not found")
+  	}
+
+  	return nil
+  }
+
+ func (s *Store) DeleteDocument(id uuid.UUID) error {
+  	query := `DELETE FROM documents WHERE id = $1`
+
+  	result, err := s.db.Exec(query, id)
+  	if err != nil {
+  		return fmt.Errorf("failed to delete document: %w", err)
+  	}
+
+  	rowsAffected, err := result.RowsAffected()
+  	if err != nil {
+  		return fmt.Errorf("failed to get rows affected: %w", err)
+  	}
+
+  	if rowsAffected == 0 {
+  		return fmt.Errorf("document not found")
+  	}
+
+  	return nil
+  }
+
diff --git a/backend/scripts/init.sql b/backend/scripts/init.sql
new file mode 100644
index 0000000..ee934a4
--- /dev/null
+++ b/backend/scripts/init.sql
@@ -0,0 +1,32 @@
+-- Initialize database schema for realtime collaboration
+
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+
+CREATE TABLE IF NOT EXISTS documents (
+    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+    name VARCHAR(255) NOT NULL,
+    type VARCHAR(50) NOT NULL CHECK (type IN ('editor', 'kanban')),
+    yjs_state BYTEA,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    updated_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE INDEX idx_documents_type ON documents(type);
+CREATE INDEX idx_documents_created_at ON documents(created_at DESC);
+
+-- Optional: Table for storing incremental updates (for history)
+CREATE TABLE IF NOT EXISTS document_updates (
+    id SERIAL PRIMARY KEY,
+    document_id UUID NOT NULL REFERENCES documents(id) ON DELETE CASCADE,
+    update BYTEA NOT NULL,
+    created_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+CREATE INDEX idx_updates_document_id ON document_updates(document_id);
+CREATE INDEX idx_updates_created_at ON document_updates(created_at DESC);
+
+-- Insert some sample documents for testing
+INSERT INTO documents (id, name, type) VALUES
+    ('00000000-0000-0000-0000-000000000001', 'Welcome Document', 'editor'),
+    ('00000000-0000-0000-0000-000000000002', 'Project Kanban', 'kanban')
+ON CONFLICT DO NOTHING;
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..9ce7c3f
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,36 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: realtime-collab-db
+    env_file:
+      - .env
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+      - ./backend/scripts/init.sql:/docker-entrypoint-initdb.d/init.sql
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  redis:
+    image: redis:7-alpine
+    container_name: realtime-collab-redis
+    ports:
+      - "6379:6379"
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 3s
+      retries: 5
+
+volumes:
+  postgres_data:
diff --git a/frontend/.env.example b/frontend/.env.example
new file mode 100644
index 0000000..770953d
--- /dev/null
+++ b/frontend/.env.example
@@ -0,0 +1,7 @@
+# API Configuration
+# Backend API base URL
+VITE_API_URL=http://localhost:8080/api
+
+# WebSocket Configuration
+# WebSocket server URL for real-time collaboration
+VITE_WS_URL=ws://localhost:8080/ws
diff --git a/frontend/.gitignore b/frontend/.gitignore
new file mode 100644
index 0000000..a0f88c9
--- /dev/null
+++ b/frontend/.gitignore
@@ -0,0 +1,26 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+.env
+.env.local
diff --git a/frontend/README.md b/frontend/README.md
new file mode 100644
index 0000000..d2e7761
--- /dev/null
+++ b/frontend/README.md
@@ -0,0 +1,73 @@
+# React + TypeScript + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## React Compiler
+
+The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+
+```js
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+
+      // Remove tseslint.configs.recommended and replace with this
+      tseslint.configs.recommendedTypeChecked,
+      // Alternatively, use this for stricter rules
+      tseslint.configs.strictTypeChecked,
+      // Optionally, add this for stylistic rules
+      tseslint.configs.stylisticTypeChecked,
+
+      // Other configs...
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
+
+You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+
+```js
+// eslint.config.js
+import reactX from 'eslint-plugin-react-x'
+import reactDom from 'eslint-plugin-react-dom'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+      // Enable lint rules for React
+      reactX.configs['recommended-typescript'],
+      // Enable lint rules for React DOM
+      reactDom.configs.recommended,
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
diff --git a/frontend/eslint.config.js b/frontend/eslint.config.js
new file mode 100644
index 0000000..5e6b472
--- /dev/null
+++ b/frontend/eslint.config.js
@@ -0,0 +1,23 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+import { defineConfig, globalIgnores } from 'eslint/config'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs.flat.recommended,
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+  },
+])
diff --git a/frontend/index.html b/frontend/index.html
new file mode 100644
index 0000000..072a57e
--- /dev/null
+++ b/frontend/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>frontend</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
new file mode 100644
index 0000000..64f4b0b
--- /dev/null
+++ b/frontend/package-lock.json
@@ -0,0 +1,4163 @@
+{
+  "name": "frontend",
+  "version": "0.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "frontend",
+      "version": "0.0.0",
+      "dependencies": {
+        "@tiptap/extension-collaboration": "^2.27.1",
+        "@tiptap/extension-collaboration-cursor": "^2.26.2",
+        "@tiptap/pm": "^2.27.1",
+        "@tiptap/react": "^2.27.1",
+        "@tiptap/starter-kit": "^2.27.1",
+        "react": "^19.2.0",
+        "react-dom": "^19.2.0",
+        "react-router-dom": "^7.11.0",
+        "y-indexeddb": "^9.0.12",
+        "y-websocket": "^3.0.0",
+        "yjs": "^13.6.28"
+      },
+      "devDependencies": {
+        "@eslint/js": "^9.39.1",
+        "@types/node": "^24.10.1",
+        "@types/react": "^19.2.5",
+        "@types/react-dom": "^19.2.3",
+        "@vitejs/plugin-react": "^5.1.1",
+        "eslint": "^9.39.1",
+        "eslint-plugin-react-hooks": "^7.0.1",
+        "eslint-plugin-react-refresh": "^0.4.24",
+        "globals": "^16.5.0",
+        "typescript": "~5.9.3",
+        "typescript-eslint": "^8.46.4",
+        "vite": "^7.2.4"
+      }
+    },
+    "node_modules/@babel/code-frame": {
+      "version": "7.27.1",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.27.1.tgz",
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+      "license": "MIT",
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+        "js-tokens": "^4.0.0",
+        "picocolors": "^1.1.1"
+      },
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+      }
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+        "gensync": "^1.0.0-beta.2",
+        "json5": "^2.2.3",
+        "semver": "^6.3.1"
+      },
+      "engines": {
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+        "type": "opencollective",
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diff --git a/frontend/package.json b/frontend/package.json
new file mode 100644
index 0000000..6993d39
--- /dev/null
+++ b/frontend/package.json
@@ -0,0 +1,39 @@
+{
+  "name": "frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@tiptap/extension-collaboration": "^2.27.1",
+    "@tiptap/extension-collaboration-cursor": "^2.26.2",
+    "@tiptap/pm": "^2.27.1",
+    "@tiptap/react": "^2.27.1",
+    "@tiptap/starter-kit": "^2.27.1",
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0",
+    "react-router-dom": "^7.11.0",
+    "y-indexeddb": "^9.0.12",
+    "y-websocket": "^3.0.0",
+    "yjs": "^13.6.28"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.1",
+    "@types/node": "^24.10.1",
+    "@types/react": "^19.2.5",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.1",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.4.24",
+    "globals": "^16.5.0",
+    "typescript": "~5.9.3",
+    "typescript-eslint": "^8.46.4",
+    "vite": "^7.2.4"
+  }
+}
diff --git a/frontend/public/icons/pixel-sprites.svg b/frontend/public/icons/pixel-sprites.svg
new file mode 100644
index 0000000..e269029
--- /dev/null
+++ b/frontend/public/icons/pixel-sprites.svg
@@ -0,0 +1,215 @@
+<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
+  <defs>
+    <!-- Document Icons -->
+    <symbol id="icon-document" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M6 2h8l4 4v14H6V2z"/>
+      <path fill="currentColor" opacity="0.3" d="M14 2v4h4l-4-4z"/>
+      <rect x="8" y="10" width="8" height="2" fill="currentColor" opacity="0.6"/>
+      <rect x="8" y="14" width="6" height="2" fill="currentColor" opacity="0.6"/>
+    </symbol>
+
+    <symbol id="icon-kanban" viewBox="0 0 24 24">
+      <rect x="2" y="4" width="6" height="16" fill="currentColor"/>
+      <rect x="9" y="4" width="6" height="10" fill="currentColor" opacity="0.7"/>
+      <rect x="16" y="4" width="6" height="14" fill="currentColor" opacity="0.5"/>
+    </symbol>
+
+    <symbol id="icon-plus" viewBox="0 0 24 24">
+      <rect x="10" y="4" width="4" height="16" fill="currentColor"/>
+      <rect x="4" y="10" width="16" height="4" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-trash" viewBox="0 0 24 24">
+      <rect x="7" y="6" width="10" height="2" fill="currentColor"/>
+      <rect x="8" y="8" width="8" height="12" fill="currentColor"/>
+      <rect x="9" y="4" width="6" height="2" fill="currentColor"/>
+      <rect x="10" y="10" width="2" height="8" fill="currentColor" opacity="0.3"/>
+      <rect x="14" y="10" width="2" height="8" fill="currentColor" opacity="0.3"/>
+    </symbol>
+
+    <symbol id="icon-back-arrow" viewBox="0 0 24 24">
+      <rect x="8" y="11" width="12" height="2" fill="currentColor"/>
+      <rect x="6" y="9" width="2" height="2" fill="currentColor"/>
+      <rect x="6" y="13" width="2" height="2" fill="currentColor"/>
+      <rect x="4" y="11" width="2" height="2" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-home" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M12 4l-8 6v10h6v-6h4v6h6V10l-8-6z"/>
+    </symbol>
+
+    <!-- Text Editor Icons -->
+    <symbol id="icon-bold" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M6 4h8c2 0 4 1.5 4 3.5s-1 3-3 3.5c2.5 0.5 4 2 4 4s-2 4-5 4H6V4z"/>
+      <rect x="8" y="7" width="6" height="2" fill="currentColor" opacity="0.3"/>
+      <rect x="8" y="13" width="7" height="2" fill="currentColor" opacity="0.3"/>
+    </symbol>
+
+    <symbol id="icon-italic" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M10 4h8v3h-2.5l-3 10H15v3H7v-3h2.5l3-10H10V4z"/>
+    </symbol>
+
+    <symbol id="icon-h1" viewBox="0 0 24 24">
+      <rect x="4" y="6" width="2" height="12" fill="currentColor"/>
+      <rect x="4" y="11" width="6" height="2" fill="currentColor"/>
+      <rect x="8" y="6" width="2" height="12" fill="currentColor"/>
+      <rect x="15" y="8" width="2" height="10" fill="currentColor"/>
+      <rect x="13" y="8" width="2" height="3" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-h2" viewBox="0 0 24 24">
+      <rect x="4" y="6" width="2" height="12" fill="currentColor"/>
+      <rect x="4" y="11" width="6" height="2" fill="currentColor"/>
+      <rect x="8" y="6" width="2" height="12" fill="currentColor"/>
+      <path fill="currentColor" d="M14 8h4v2h-2v2h2v2h-4v2h6v-2h-2v-2h2v-2h-2V8h2V6h-6v2z"/>
+    </symbol>
+
+    <symbol id="icon-bullet-list" viewBox="0 0 24 24">
+      <rect x="4" y="6" width="3" height="3" fill="currentColor"/>
+      <rect x="9" y="7" width="11" height="2" fill="currentColor"/>
+      <rect x="4" y="11" width="3" height="3" fill="currentColor"/>
+      <rect x="9" y="12" width="11" height="2" fill="currentColor"/>
+      <rect x="4" y="16" width="3" height="3" fill="currentColor"/>
+      <rect x="9" y="17" width="11" height="2" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-numbered-list" viewBox="0 0 24 24">
+      <text x="4" y="9" font-size="8" font-weight="bold" fill="currentColor">1</text>
+      <rect x="9" y="7" width="11" height="2" fill="currentColor"/>
+      <text x="4" y="14" font-size="8" font-weight="bold" fill="currentColor">2</text>
+      <rect x="9" y="12" width="11" height="2" fill="currentColor"/>
+      <text x="4" y="19" font-size="8" font-weight="bold" fill="currentColor">3</text>
+      <rect x="9" y="17" width="11" height="2" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-undo" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M8 8V4l-6 6 6 6v-4h6c2 0 4 2 4 4v2h2v-2c0-3.3-2.7-6-6-6H8z"/>
+    </symbol>
+
+    <symbol id="icon-redo" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M16 8V4l6 6-6 6v-4h-6c-3.3 0-6 2.7-6 6v2H2v-2c0-4.4 3.6-8 8-8h6z"/>
+    </symbol>
+
+    <!-- Status Icons -->
+    <symbol id="icon-checkmark" viewBox="0 0 24 24">
+      <rect x="4" y="12" width="2" height="2" fill="currentColor"/>
+      <rect x="6" y="14" width="2" height="2" fill="currentColor"/>
+      <rect x="8" y="16" width="2" height="2" fill="currentColor"/>
+      <rect x="10" y="14" width="2" height="2" fill="currentColor"/>
+      <rect x="12" y="12" width="2" height="2" fill="currentColor"/>
+      <rect x="14" y="10" width="2" height="2" fill="currentColor"/>
+      <rect x="16" y="8" width="2" height="2" fill="currentColor"/>
+      <rect x="18" y="6" width="2" height="2" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-sync-arrows" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M12 4V2l-4 4 4 4V8c3.3 0 6 2.7 6 6h2c0-4.4-3.6-8-8-8z"/>
+      <path fill="currentColor" d="M12 20v2l4-4-4-4v2c-3.3 0-6-2.7-6-6H4c0 4.4 3.6 8 8 8z"/>
+    </symbol>
+
+    <symbol id="icon-spinner" viewBox="0 0 24 24">
+      <rect x="11" y="2" width="2" height="6" fill="currentColor"/>
+      <rect x="11" y="16" width="2" height="6" fill="currentColor" opacity="0.3"/>
+      <rect x="2" y="11" width="6" height="2" fill="currentColor" opacity="0.5"/>
+      <rect x="16" y="11" width="6" height="2" fill="currentColor" opacity="0.7"/>
+      <rect x="5" y="5" width="3" height="3" fill="currentColor" opacity="0.8"/>
+      <rect x="16" y="16" width="3" height="3" fill="currentColor" opacity="0.4"/>
+      <rect x="5" y="16" width="3" height="3" fill="currentColor" opacity="0.6"/>
+      <rect x="16" y="5" width="3" height="3" fill="currentColor" opacity="0.9"/>
+    </symbol>
+
+    <symbol id="icon-connected" viewBox="0 0 24 24">
+      <circle cx="12" cy="12" r="8" fill="currentColor"/>
+      <circle cx="12" cy="12" r="4" fill="currentColor" opacity="0.5"/>
+    </symbol>
+
+    <symbol id="icon-disconnected" viewBox="0 0 24 24">
+      <circle cx="12" cy="12" r="8" fill="currentColor" opacity="0.3"/>
+      <rect x="6" y="11" width="12" height="2" fill="currentColor" transform="rotate(45 12 12)"/>
+    </symbol>
+
+    <!-- Decorative Sprites -->
+    <symbol id="icon-sparkle" viewBox="0 0 24 24">
+      <rect x="11" y="4" width="2" height="6" fill="currentColor"/>
+      <rect x="11" y="14" width="2" height="6" fill="currentColor"/>
+      <rect x="4" y="11" width="6" height="2" fill="currentColor"/>
+      <rect x="14" y="11" width="6" height="2" fill="currentColor"/>
+      <rect x="7" y="7" width="2" height="2" fill="currentColor"/>
+      <rect x="15" y="7" width="2" height="2" fill="currentColor"/>
+      <rect x="7" y="15" width="2" height="2" fill="currentColor"/>
+      <rect x="15" y="15" width="2" height="2" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-gem" viewBox="0 0 24 24">
+      <path fill="#FF6EC7" d="M12 4l-8 6 8 10 8-10-8-6z"/>
+      <path fill="#FFD23F" opacity="0.7" d="M12 4l-4 3 4 5 4-5-4-3z"/>
+      <path fill="#00D9FF" opacity="0.5" d="M8 10l4 10v-8l-4-2z"/>
+      <path fill="#8B4FB9" opacity="0.5" d="M16 10l-4 10v-8l4-2z"/>
+    </symbol>
+
+    <symbol id="icon-orb" viewBox="0 0 24 24">
+      <circle cx="12" cy="12" r="8" fill="#8B4FB9"/>
+      <circle cx="10" cy="10" r="3" fill="#FF6EC7" opacity="0.6"/>
+      <circle cx="14" cy="14" r="2" fill="#00D9FF" opacity="0.4"/>
+    </symbol>
+
+    <symbol id="icon-wand" viewBox="0 0 24 24">
+      <rect x="3" y="17" width="14" height="3" fill="currentColor" transform="rotate(-45 10 18.5)"/>
+      <rect x="16" y="4" width="2" height="2" fill="#FFD23F"/>
+      <rect x="18" y="6" width="2" height="2" fill="#FF6EC7"/>
+      <rect x="14" y="6" width="2" height="2" fill="#00D9FF"/>
+      <rect x="16" y="8" width="2" height="2" fill="#8EF048"/>
+    </symbol>
+
+    <symbol id="icon-scroll" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M6 4h12v2h-2v12h2v2H6v-2h2V6H6V4z"/>
+      <rect x="10" y="8" width="6" height="2" fill="currentColor" opacity="0.3"/>
+      <rect x="10" y="12" width="4" height="2" fill="currentColor" opacity="0.3"/>
+    </symbol>
+
+    <symbol id="icon-chest" viewBox="0 0 24 24">
+      <rect x="4" y="10" width="16" height="10" fill="#FF8E3C"/>
+      <rect x="4" y="8" width="16" height="2" fill="#FFD23F"/>
+      <rect x="11" y="13" width="2" height="4" fill="#FFD23F"/>
+      <circle cx="12" cy="15" r="1" fill="#4A1B6F"/>
+    </symbol>
+
+    <symbol id="icon-potion" viewBox="0 0 24 24">
+      <rect x="10" y="4" width="4" height="3" fill="currentColor"/>
+      <path fill="#FF6EC7" d="M8 7h8v2h-1v9H9V9H8V7z"/>
+      <rect x="9" y="11" width="6" height="5" fill="#00D9FF" opacity="0.6"/>
+    </symbol>
+
+    <symbol id="icon-shield" viewBox="0 0 24 24">
+      <path fill="currentColor" d="M12 2l-8 4v6c0 5 3.6 9.2 8 10 4.4-0.8 8-5 8-10V6l-8-4z"/>
+      <path fill="currentColor" opacity="0.3" d="M12 4l-6 3v5c0 3.7 2.7 6.9 6 7.5V4z"/>
+    </symbol>
+
+    <symbol id="icon-sword" viewBox="0 0 24 24">
+      <rect x="3" y="15" width="4" height="4" fill="currentColor"/>
+      <rect x="7" y="11" width="2" height="2" fill="currentColor"/>
+      <rect x="9" y="9" width="2" height="2" fill="currentColor"/>
+      <rect x="11" y="7" width="10" height="2" fill="currentColor"/>
+      <rect x="19" y="5" width="2" height="2" fill="currentColor"/>
+      <rect x="19" y="9" width="2" height="2" fill="currentColor"/>
+    </symbol>
+
+    <symbol id="icon-crown" viewBox="0 0 24 24">
+      <path fill="#FFD23F" d="M4 16h16v2H4v-2z"/>
+      <path fill="#FFD23F" d="M4 10l4 4 4-6 4 6 4-4v6H4v-6z"/>
+      <circle cx="6" cy="8" r="2" fill="#FF6EC7"/>
+      <circle cx="12" cy="4" r="2" fill="#FF6EC7"/>
+      <circle cx="18" cy="8" r="2" fill="#FF6EC7"/>
+    </symbol>
+
+    <symbol id="icon-user" viewBox="0 0 24 24">
+      <rect x="8" y="4" width="8" height="8" fill="currentColor"/>
+      <path fill="currentColor" d="M6 14h12l2 6H4l2-6z"/>
+    </symbol>
+
+    <symbol id="icon-online-dot" viewBox="0 0 24 24">
+      <circle cx="12" cy="12" r="6" fill="#8EF048"/>
+      <circle cx="10" cy="10" r="2" fill="#FFFFFF" opacity="0.6"/>
+    </symbol>
+  </defs>
+</svg>
diff --git a/frontend/public/pixel-patterns.svg b/frontend/public/pixel-patterns.svg
new file mode 100644
index 0000000..2363f03
--- /dev/null
+++ b/frontend/public/pixel-patterns.svg
@@ -0,0 +1,70 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="0" height="0" style="position: absolute;">
+  <defs>
+    <!-- Diagonal Dither Pattern (8x8 tile) -->
+    <pattern id="pixel-dither-diagonal" x="0" y="0" width="8" height="8" patternUnits="userSpaceOnUse">
+      <rect fill="#4A3B5C" width="8" height="8"/>
+      <path d="M0,0 L2,0 L2,2 L0,2 Z M4,0 L6,0 L6,2 L4,2 Z
+               M2,2 L4,2 L4,4 L2,4 Z M6,2 L8,2 L8,4 L6,4 Z
+               M0,4 L2,4 L2,6 L0,6 Z M4,4 L6,4 L6,6 L4,6 Z
+               M2,6 L4,6 L4,8 L2,8 Z M6,6 L8,6 L8,8 L6,8 Z"
+               fill="#8B4FB9" opacity="0.15"/>
+    </pattern>
+
+    <!-- Subtle Checkerboard Pattern (4x4 tile) -->
+    <pattern id="pixel-checker-subtle" x="0" y="0" width="4" height="4" patternUnits="userSpaceOnUse">
+      <rect fill="transparent" width="4" height="4"/>
+      <rect fill="rgba(75, 27, 111, 0.08)" x="0" y="0" width="2" height="2"/>
+      <rect fill="rgba(75, 27, 111, 0.08)" x="2" y="2" width="2" height="2"/>
+    </pattern>
+
+    <!-- Dense Pixel Dots (for backgrounds) -->
+    <pattern id="pixel-dots" x="0" y="0" width="6" height="6" patternUnits="userSpaceOnUse">
+      <rect fill="transparent" width="6" height="6"/>
+      <circle cx="3" cy="3" r="1" fill="rgba(139, 79, 185, 0.1)"/>
+    </pattern>
+
+    <!-- Gradient Dither (vertical) -->
+    <pattern id="pixel-gradient-dither" x="0" y="0" width="16" height="64" patternUnits="userSpaceOnUse">
+      <rect fill="transparent" width="16" height="64"/>
+      <!-- Top section - dense dots -->
+      <g fill="rgba(75, 27, 111, 0.12)">
+        <rect x="0" y="0" width="2" height="2"/>
+        <rect x="4" y="0" width="2" height="2"/>
+        <rect x="8" y="0" width="2" height="2"/>
+        <rect x="12" y="0" width="2" height="2"/>
+        <rect x="2" y="2" width="2" height="2"/>
+        <rect x="6" y="2" width="2" height="2"/>
+        <rect x="10" y="2" width="2" height="2"/>
+        <rect x="14" y="2" width="2" height="2"/>
+      </g>
+      <!-- Middle section - medium -->
+      <g fill="rgba(75, 27, 111, 0.08)">
+        <rect x="0" y="16" width="2" height="2"/>
+        <rect x="8" y="16" width="2" height="2"/>
+        <rect x="4" y="18" width="2" height="2"/>
+        <rect x="12" y="18" width="2" height="2"/>
+      </g>
+      <!-- Bottom section - sparse -->
+      <g fill="rgba(75, 27, 111, 0.04)">
+        <rect x="2" y="48" width="2" height="2"/>
+        <rect x="10" y="50" width="2" height="2"/>
+      </g>
+    </pattern>
+
+    <!-- Scanlines Pattern (CRT effect) -->
+    <pattern id="pixel-scanlines" x="0" y="0" width="4" height="4" patternUnits="userSpaceOnUse">
+      <rect fill="transparent" width="4" height="4"/>
+      <line x1="0" y1="0" x2="4" y2="0" stroke="rgba(0, 0, 0, 0.03)" stroke-width="1"/>
+      <line x1="0" y1="2" x2="4" y2="2" stroke="rgba(0, 0, 0, 0.03)" stroke-width="1"/>
+    </pattern>
+
+    <!-- Panel Texture (for light backgrounds) -->
+    <pattern id="pixel-panel-texture" x="0" y="0" width="8" height="8" patternUnits="userSpaceOnUse">
+      <rect fill="transparent" width="8" height="8"/>
+      <rect x="0" y="0" width="1" height="1" fill="rgba(139, 79, 185, 0.06)"/>
+      <rect x="4" y="4" width="1" height="1" fill="rgba(139, 79, 185, 0.06)"/>
+      <rect x="2" y="6" width="1" height="1" fill="rgba(255, 110, 199, 0.04)"/>
+      <rect x="6" y="2" width="1" height="1" fill="rgba(0, 217, 255, 0.04)"/>
+    </pattern>
+  </defs>
+</svg>
diff --git a/frontend/public/vite.svg b/frontend/public/vite.svg
new file mode 100644
index 0000000..e7b8dfb
--- /dev/null
+++ b/frontend/public/vite.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>
\ No newline at end of file
diff --git a/frontend/src/App.css b/frontend/src/App.css
new file mode 100644
index 0000000..b9d355d
--- /dev/null
+++ b/frontend/src/App.css
@@ -0,0 +1,42 @@
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
new file mode 100644
index 0000000..6c7c06b
--- /dev/null
+++ b/frontend/src/App.tsx
@@ -0,0 +1,18 @@
+import { BrowserRouter, Route, Routes } from "react-router-dom";
+import EditorPage from "./pages/EditorPage.tsx";
+import Home from "./pages/Home.tsx";
+import KanbanPage from "./pages/KanbanPage.tsx";
+
+function App() {
+  return (
+    <BrowserRouter>
+      <Routes>
+        <Route path="/" element={<Home />} />
+        <Route path="/editor/:id" element={<EditorPage />} />
+        <Route path="/kanban/:id" element={<KanbanPage />} />
+      </Routes>
+    </BrowserRouter>
+  );
+}
+
+export default App;
diff --git a/frontend/src/api/document.ts b/frontend/src/api/document.ts
new file mode 100644
index 0000000..50dcbc1
--- /dev/null
+++ b/frontend/src/api/document.ts
@@ -0,0 +1,71 @@
+const API_BASE_URL = import.meta.env.VITE_API_URL || "http://localhost:8080/api";
+
+export type DocumentType = {
+  id: string;
+  name: string;
+  type: "editor" | "kanban";
+  created_at: string;
+  updated_at: string;
+}
+
+export type CreateDocumentRequest = {
+  name: string;
+  type: "editor" | "kanban";
+}
+
+export const documentsApi = {
+  // List all documents
+  list: async (): Promise<{ documents: DocumentType[]; total: number }> => {
+    const response = await fetch(`${API_BASE_URL}/documents`);
+    if (!response.ok) throw new Error("Failed to fetch documents");
+    return response.json();
+  },
+
+  // Get a single document
+  get: async (id: string): Promise<DocumentType> => {
+    const response = await fetch(`${API_BASE_URL}/documents/${id}`);
+    if (!response.ok) throw new Error("Failed to fetch document");
+    return response.json();
+  },
+
+  // Create a new document
+  create: async (data: CreateDocumentRequest): Promise<DocumentType> => {
+    const response = await fetch(`${API_BASE_URL}/documents`, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(data),
+    });
+    if (!response.ok) throw new Error("Failed to create document");
+    return response.json();
+  },
+
+  // Delete a document
+  delete: async (id: string): Promise<void> => {
+    const response = await fetch(`${API_BASE_URL}/documents/${id}`, {
+      method: "DELETE",
+    });
+    if (!response.ok) throw new Error("Failed to delete document");
+  },
+
+  // Get document Yjs state
+  getState: async (id: string): Promise<Uint8Array> => {
+    const response = await fetch(`${API_BASE_URL}/documents/${id}/state`);
+    if (!response.ok) throw new Error("Failed to fetch document state");
+    const arrayBuffer = await response.arrayBuffer();
+    return new Uint8Array(arrayBuffer);
+  },
+
+  // Update document Yjs state
+  updateState: async (id: string, state: Uint8Array): Promise<void> => {
+    // Create a new ArrayBuffer copy to ensure compatibility
+    const buffer = new ArrayBuffer(state.byteLength);
+    new Uint8Array(buffer).set(state);
+
+    const response = await fetch(`${API_BASE_URL}/documents/${id}/state`, {
+      method: "PUT",
+      headers: { "Content-Type": "application/octet-stream" },
+      body: buffer,
+    });
+    if (!response.ok) throw new Error("Failed to update document state");
+  },
+};
\ No newline at end of file
diff --git a/frontend/src/assets/react.svg b/frontend/src/assets/react.svg
new file mode 100644
index 0000000..6c87de9
--- /dev/null
+++ b/frontend/src/assets/react.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="35.93" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 228"><path fill="#00D8FF" d="M210.483 73.824a171.49 171.49 0 0 0-8.24-2.597c.465-1.9.893-3.777 1.273-5.621c6.238-30.281 2.16-54.676-11.769-62.708c-13.355-7.7-35.196.329-57.254 19.526a171.23 171.23 0 0 0-6.375 5.848a155.866 155.866 0 0 0-4.241-3.917C100.759 3.829 77.587-4.822 63.673 3.233C50.33 10.957 46.379 33.89 51.995 62.588a170.974 170.974 0 0 0 1.892 8.48c-3.28.932-6.445 1.924-9.474 2.98C17.309 83.498 0 98.307 0 113.668c0 15.865 18.582 31.778 46.812 41.427a145.52 145.52 0 0 0 6.921 2.165a167.467 167.467 0 0 0-2.01 9.138c-5.354 28.2-1.173 50.591 12.134 58.266c13.744 7.926 36.812-.22 59.273-19.855a145.567 145.567 0 0 0 5.342-4.923a168.064 168.064 0 0 0 6.92 6.314c21.758 18.722 43.246 26.282 56.54 18.586c13.731-7.949 18.194-32.003 12.4-61.268a145.016 145.016 0 0 0-1.535-6.842c1.62-.48 3.21-.974 4.76-1.488c29.348-9.723 48.443-25.443 48.443-41.52c0-15.417-17.868-30.326-45.517-39.844Zm-6.365 70.984c-1.4.463-2.836.91-4.3 1.345c-3.24-10.257-7.612-21.163-12.963-32.432c5.106-11 9.31-21.767 12.459-31.957c2.619.758 5.16 1.557 7.61 2.4c23.69 8.156 38.14 20.213 38.14 29.504c0 9.896-15.606 22.743-40.946 31.14Zm-10.514 20.834c2.562 12.94 2.927 24.64 1.23 33.787c-1.524 8.219-4.59 13.698-8.382 15.893c-8.067 4.67-25.32-1.4-43.927-17.412a156.726 156.726 0 0 1-6.437-5.87c7.214-7.889 14.423-17.06 21.459-27.246c12.376-1.098 24.068-2.894 34.671-5.345a134.17 134.17 0 0 1 1.386 6.193ZM87.276 214.515c-7.882 2.783-14.16 2.863-17.955.675c-8.075-4.657-11.432-22.636-6.853-46.752a156.923 156.923 0 0 1 1.869-8.499c10.486 2.32 22.093 3.988 34.498 4.994c7.084 9.967 14.501 19.128 21.976 27.15a134.668 134.668 0 0 1-4.877 4.492c-9.933 8.682-19.886 14.842-28.658 17.94ZM50.35 144.747c-12.483-4.267-22.792-9.812-29.858-15.863c-6.35-5.437-9.555-10.836-9.555-15.216c0-9.322 13.897-21.212 37.076-29.293c2.813-.98 5.757-1.905 8.812-2.773c3.204 10.42 7.406 21.315 12.477 32.332c-5.137 11.18-9.399 22.249-12.634 32.792a134.718 134.718 0 0 1-6.318-1.979Zm12.378-84.26c-4.811-24.587-1.616-43.134 6.425-47.789c8.564-4.958 27.502 2.111 47.463 19.835a144.318 144.318 0 0 1 3.841 3.545c-7.438 7.987-14.787 17.08-21.808 26.988c-12.04 1.116-23.565 2.908-34.161 5.309a160.342 160.342 0 0 1-1.76-7.887Zm110.427 27.268a347.8 347.8 0 0 0-7.785-12.803c8.168 1.033 15.994 2.404 23.343 4.08c-2.206 7.072-4.956 14.465-8.193 22.045a381.151 381.151 0 0 0-7.365-13.322Zm-45.032-43.861c5.044 5.465 10.096 11.566 15.065 18.186a322.04 322.04 0 0 0-30.257-.006c4.974-6.559 10.069-12.652 15.192-18.18ZM82.802 87.83a323.167 323.167 0 0 0-7.227 13.238c-3.184-7.553-5.909-14.98-8.134-22.152c7.304-1.634 15.093-2.97 23.209-3.984a321.524 321.524 0 0 0-7.848 12.897Zm8.081 65.352c-8.385-.936-16.291-2.203-23.593-3.793c2.26-7.3 5.045-14.885 8.298-22.6a321.187 321.187 0 0 0 7.257 13.246c2.594 4.48 5.28 8.868 8.038 13.147Zm37.542 31.03c-5.184-5.592-10.354-11.779-15.403-18.433c4.902.192 9.899.29 14.978.29c5.218 0 10.376-.117 15.453-.343c-4.985 6.774-10.018 12.97-15.028 18.486Zm52.198-57.817c3.422 7.8 6.306 15.345 8.596 22.52c-7.422 1.694-15.436 3.058-23.88 4.071a382.417 382.417 0 0 0 7.859-13.026a347.403 347.403 0 0 0 7.425-13.565Zm-16.898 8.101a358.557 358.557 0 0 1-12.281 19.815a329.4 329.4 0 0 1-23.444.823c-7.967 0-15.716-.248-23.178-.732a310.202 310.202 0 0 1-12.513-19.846h.001a307.41 307.41 0 0 1-10.923-20.627a310.278 310.278 0 0 1 10.89-20.637l-.001.001a307.318 307.318 0 0 1 12.413-19.761c7.613-.576 15.42-.876 23.31-.876H128c7.926 0 15.743.303 23.354.883a329.357 329.357 0 0 1 12.335 19.695a358.489 358.489 0 0 1 11.036 20.54a329.472 329.472 0 0 1-11 20.722Zm22.56-122.124c8.572 4.944 11.906 24.881 6.52 51.026c-.344 1.668-.73 3.367-1.15 5.09c-10.622-2.452-22.155-4.275-34.23-5.408c-7.034-10.017-14.323-19.124-21.64-27.008a160.789 160.789 0 0 1 5.888-5.4c18.9-16.447 36.564-22.941 44.612-18.3ZM128 90.808c12.625 0 22.86 10.235 22.86 22.86s-10.235 22.86-22.86 22.86s-22.86-10.235-22.86-22.86s10.235-22.86 22.86-22.86Z"></path></svg>
\ No newline at end of file
diff --git a/frontend/src/components/Editor/Editor.tsx b/frontend/src/components/Editor/Editor.tsx
new file mode 100644
index 0000000..aa834e1
--- /dev/null
+++ b/frontend/src/components/Editor/Editor.tsx
@@ -0,0 +1,58 @@
+import Collaboration from "@tiptap/extension-collaboration";
+import CollaborationCursor from "@tiptap/extension-collaboration-cursor";
+import { EditorContent, useEditor } from "@tiptap/react";
+import StarterKit from "@tiptap/starter-kit";
+import { useEffect } from "react";
+import type { YjsProviders } from "../../lib/yjs";
+import Toolbar from "./Toolbar.tsx";
+
+interface EditorProps {
+  providers: YjsProviders;
+}
+
+const Editor = ({ providers }: EditorProps) => {
+  const editor = useEditor({
+    extensions: [
+      StarterKit.configure({
+        history: false, // Use Yjs history instead
+      }),
+      Collaboration.configure({
+        document: providers.ydoc,
+      }),
+      CollaborationCursor.configure({
+        provider: providers.websocketProvider,
+        user: providers.awareness.getLocalState()?.user || {
+          name: "Anonymous",
+          color: "#000000",
+        },
+      }),
+    ],
+    content: "",
+  });
+
+  useEffect(() => {
+    if (editor && providers.awareness) {
+      const user = providers.awareness.getLocalState()?.user;
+      if (user) {
+        editor.extensionManager.extensions.forEach((extension: any) => {
+          if (extension.name === "collaborationCursor") {
+            extension.options.user = user;
+          }
+        });
+      }
+    }
+  }, [editor, providers.awareness]);
+
+  if (!editor) {
+    return <div>Loading editor...</div>;
+  }
+
+  return (
+    <div className="editor-container">
+      <Toolbar editor={editor} />
+      <EditorContent editor={editor} className="editor-content" />
+    </div>
+  );
+};
+
+export default Editor;
diff --git a/frontend/src/components/Editor/Toolbar.tsx b/frontend/src/components/Editor/Toolbar.tsx
new file mode 100644
index 0000000..64189b2
--- /dev/null
+++ b/frontend/src/components/Editor/Toolbar.tsx
@@ -0,0 +1,52 @@
+import { Editor } from "@tiptap/react";
+
+interface ToolbarProps {
+  editor: Editor;
+}
+
+const Toolbar = ({ editor }: ToolbarProps) => {
+  return (
+    <div className="toolbar">
+      <button
+        onClick={() => editor.chain().focus().toggleBold().run()}
+        className={editor.isActive("bold") ? "active" : ""}
+      >
+        Bold
+      </button>
+      <button
+        onClick={() => editor.chain().focus().toggleItalic().run()}
+        className={editor.isActive("italic") ? "active" : ""}
+      >
+        Italic
+      </button>
+      <button
+        onClick={() => editor.chain().focus().toggleHeading({ level: 1 }).run()}
+        className={editor.isActive("heading", { level: 1 }) ? "active" : ""}
+      >
+        H1
+      </button>
+      <button
+        onClick={() => editor.chain().focus().toggleHeading({ level: 2 }).run()}
+        className={editor.isActive("heading", { level: 2 }) ? "active" : ""}
+      >
+        H2
+      </button>
+      <button
+        onClick={() => editor.chain().focus().toggleBulletList().run()}
+        className={editor.isActive("bulletList") ? "active" : ""}
+      >
+        Bullet List
+      </button>
+      <button
+        onClick={() => editor.chain().focus().toggleOrderedList().run()}
+        className={editor.isActive("orderedList") ? "active" : ""}
+      >
+        Ordered List
+      </button>
+      <button onClick={() => editor.chain().focus().undo().run()}>Undo</button>
+      <button onClick={() => editor.chain().focus().redo().run()}>Redo</button>
+    </div>
+  );
+};
+
+export default Toolbar;
diff --git a/frontend/src/components/Kanban/Card.tsx b/frontend/src/components/Kanban/Card.tsx
new file mode 100644
index 0000000..a268561
--- /dev/null
+++ b/frontend/src/components/Kanban/Card.tsx
@@ -0,0 +1,16 @@
+import type { Task } from "./KanbanBoard.tsx";
+
+interface CardProps {
+  task: Task;
+}
+
+const Card = ({ task }: CardProps) => {
+  return (
+    <div className="kanban-card">
+      <h4>{task.title}</h4>
+      {task.description && <p>{task.description}</p>}
+    </div>
+  );
+};
+
+export default Card;
diff --git a/frontend/src/components/Kanban/Column.tsx b/frontend/src/components/Kanban/Column.tsx
new file mode 100644
index 0000000..e45bda4
--- /dev/null
+++ b/frontend/src/components/Kanban/Column.tsx
@@ -0,0 +1,60 @@
+import { useState } from "react";
+import Card from "./Card.tsx";
+import type { KanbanColumn, Task } from "./KanbanBoard.tsx";
+
+interface ColumnProps {
+  column: KanbanColumn;
+  onAddTask: (task: Task) => void;
+  onMoveTask: (taskId: string, toColumnId: string) => void;
+}
+
+const Column = ({ column, onAddTask }: ColumnProps) => {
+  const [isAdding, setIsAdding] = useState(false);
+  const [newTaskTitle, setNewTaskTitle] = useState("");
+
+  const handleAddTask = () => {
+    if (newTaskTitle.trim()) {
+      onAddTask({
+        id: `task-${Date.now()}`,
+        title: newTaskTitle,
+        description: "",
+      });
+      setNewTaskTitle("");
+      setIsAdding(false);
+    }
+  };
+
+  return (
+    <div className="kanban-column">
+      <h3 className="column-title">{column.title}</h3>
+      <div className="column-content">
+        {column.tasks.map((task) => (
+          <Card key={task.id} task={task} />
+        ))}
+
+        {isAdding ? (
+          <div className="add-task-form">
+            <input
+              type="text"
+              value={newTaskTitle}
+              onChange={(e) => setNewTaskTitle(e.target.value)}
+              placeholder="Task title..."
+              autoFocus
+              onKeyPress={(e) => e.key === "Enter" && handleAddTask()}
+            />
+            <div className="form-actions">
+              <button onClick={handleAddTask}>Add</button>
+              <button onClick={() => setIsAdding(false)}>Cancel</button>
+            </div>
+          </div>
+        ) : (
+          <button className="add-task-btn" onClick={() => setIsAdding(true)}>
+            + Add Task
+          </button>
+        )}
+      </div>
+    </div>
+  );
+};
+
+export default Column;
diff --git a/frontend/src/components/Kanban/KanbanBoard.tsx b/frontend/src/components/Kanban/KanbanBoard.tsx
new file mode 100644
index 0000000..567ecc4
--- /dev/null
+++ b/frontend/src/components/Kanban/KanbanBoard.tsx
@@ -0,0 +1,112 @@
+import { useEffect, useState } from "react";
+import type { YjsProviders } from "../../lib/yjs";
+import Column from "./Column.tsx";
+
+interface KanbanBoardProps {
+  providers: YjsProviders;
+}
+
+export interface Task {
+  id: string;
+  title: string;
+  description: string;
+}
+
+export interface KanbanColumn {
+  id: string;
+  title: string;
+  tasks: Task[];
+}
+
+const KanbanBoard = ({ providers }: KanbanBoardProps) => {
+  const [columns, setColumns] = useState<KanbanColumn[]>([]);
+
+  useEffect(() => {
+    const yarray = providers.ydoc.getArray<any>("kanban-columns");
+
+    // Initialize with default columns if empty
+    if (yarray.length === 0) {
+      providers.ydoc.transact(() => {
+        yarray.push([
+          { id: "todo", title: "To Do", tasks: [] },
+          { id: "in-progress", title: "In Progress", tasks: [] },
+          { id: "done", title: "Done", tasks: [] },
+        ]);
+      });
+    }
+
+    // Update state when Yjs array changes
+    const updateColumns = () => {
+      setColumns(yarray.toArray());
+    };
+
+    updateColumns();
+    yarray.observe(updateColumns);
+
+    return () => {
+      yarray.unobserve(updateColumns);
+    };
+  }, [providers.ydoc]);
+
+  const addTask = (columnId: string, task: Task) => {
+    const yarray = providers.ydoc.getArray("kanban-columns");
+    const cols = yarray.toArray();
+    const columnIndex = cols.findIndex((col: any) => col.id === columnId);
+
+    if (columnIndex !== -1) {
+      providers.ydoc.transact(() => {
+        const column = cols[columnIndex];
+        column.tasks.push(task);
+        yarray.delete(columnIndex, 1);
+        yarray.insert(columnIndex, [column]);
+      });
+    }
+  };
+
+  const moveTask = (
+    fromColumnId: string,
+    toColumnId: string,
+    taskId: string
+  ) => {
+    const yarray = providers.ydoc.getArray("kanban-columns");
+    const cols = yarray.toArray();
+
+    const fromIndex = cols.findIndex((col: any) => col.id === fromColumnId);
+    const toIndex = cols.findIndex((col: any) => col.id === toColumnId);
+
+    if (fromIndex !== -1 && toIndex !== -1) {
+      providers.ydoc.transact(() => {
+        const fromCol = { ...cols[fromIndex] };
+        const toCol = { ...cols[toIndex] };
+
+        const taskIndex = fromCol.tasks.findIndex((t: Task) => t.id === taskId);
+        if (taskIndex !== -1) {
+          const [task] = fromCol.tasks.splice(taskIndex, 1);
+          toCol.tasks.push(task);
+
+          yarray.delete(fromIndex, 1);
+          yarray.insert(fromIndex, [fromCol]);
+          yarray.delete(toIndex, 1);
+          yarray.insert(toIndex, [toCol]);
+        }
+      });
+    }
+  };
+
+  return (
+    <div className="kanban-board">
+      {columns.map((column) => (
+        <Column
+          key={column.id}
+          column={column}
+          onAddTask={(task) => addTask(column.id, task)}
+          onMoveTask={(taskId, toColumnId) =>
+            moveTask(column.id, toColumnId, taskId)
+          }
+        />
+      ))}
+    </div>
+  );
+};
+
+export default KanbanBoard;
diff --git a/frontend/src/components/PixelIcon/PixelIcon.tsx b/frontend/src/components/PixelIcon/PixelIcon.tsx
new file mode 100644
index 0000000..0f21491
--- /dev/null
+++ b/frontend/src/components/PixelIcon/PixelIcon.tsx
@@ -0,0 +1,31 @@
+interface PixelIconProps {
+  name: string;
+  size?: number;
+  color?: string;
+  animated?: boolean;
+  className?: string;
+  style?: React.CSSProperties;
+}
+
+const PixelIcon = ({
+  name,
+  size = 24,
+  color,
+  animated = false,
+  className = '',
+  style = {}
+}: PixelIconProps) => {
+  return (
+    <svg
+      width={size}
+      height={size}
+      className={`pixel-icon ${animated ? 'pixel-icon-animated' : ''} ${className}`}
+      style={{ color, ...style }}
+      aria-hidden="true"
+    >
+      <use href={`/icons/pixel-sprites.svg#icon-${name}`} />
+    </svg>
+  );
+};
+
+export default PixelIcon;
diff --git a/frontend/src/components/PixelSprites/FloatingGem.tsx b/frontend/src/components/PixelSprites/FloatingGem.tsx
new file mode 100644
index 0000000..0cbd05d
--- /dev/null
+++ b/frontend/src/components/PixelSprites/FloatingGem.tsx
@@ -0,0 +1,32 @@
+import { CSSProperties } from 'react';
+
+interface FloatingGemProps {
+  position?: { top?: string; right?: string; bottom?: string; left?: string };
+  delay?: number;
+  size?: number;
+}
+
+const FloatingGem = ({ position = {}, delay = 0, size = 32 }: FloatingGemProps) => {
+  const style: CSSProperties = {
+    position: 'absolute',
+    ...position,
+    animation: `pixel-float 4s ease-in-out infinite`,
+    animationDelay: `${delay}s`,
+    pointerEvents: 'none',
+    zIndex: 10,
+  };
+
+  return (
+    <svg
+      width={size}
+      height={size}
+      style={style}
+      viewBox="0 0 24 24"
+      aria-hidden="true"
+    >
+      <use href="/icons/pixel-sprites.svg#icon-gem" />
+    </svg>
+  );
+};
+
+export default FloatingGem;
diff --git a/frontend/src/components/Presence/UserList.tsx b/frontend/src/components/Presence/UserList.tsx
new file mode 100644
index 0000000..3702c1b
--- /dev/null
+++ b/frontend/src/components/Presence/UserList.tsx
@@ -0,0 +1,60 @@
+import { useEffect, useState } from "react";
+
+interface UserListProps {
+  awareness: any;
+}
+
+interface User {
+  clientId: number;
+  name: string;
+  color: string;
+}
+
+const UserList = ({ awareness }: UserListProps) => {
+  const [users, setUsers] = useState<User[]>([]);
+
+  useEffect(() => {
+    const updateUsers = () => {
+      const states = awareness.getStates();
+      const userList: User[] = [];
+
+      states.forEach((state: any, clientId: number) => {
+        if (state.user) {
+          userList.push({
+            clientId,
+            name: state.user.name,
+            color: state.user.color,
+          });
+        }
+      });
+
+      setUsers(userList);
+    };
+
+    updateUsers();
+    awareness.on("change", updateUsers);
+
+    return () => {
+      awareness.off("change", updateUsers);
+    };
+  }, [awareness]);
+
+  return (
+    <div className="user-list">
+      <h4>Online Users ({users.length})</h4>
+      <div className="users">
+        {users.map((user) => (
+          <div key={user.clientId} className="user">
+            <span
+              className="user-color"
+              style={{ backgroundColor: user.color }}
+            ></span>
+            <span className="user-name">{user.name}</span>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+};
+
+export default UserList;
diff --git a/frontend/src/hooks/useAutoSave.ts b/frontend/src/hooks/useAutoSave.ts
new file mode 100644
index 0000000..8f41daf
--- /dev/null
+++ b/frontend/src/hooks/useAutoSave.ts
@@ -0,0 +1,48 @@
+import { useEffect, useRef } from 'react';
+import * as Y from 'yjs';
+import { documentsApi } from '../api/document';
+
+export const useAutoSave = (documentId: string, ydoc: Y.Doc | null) => {
+  const saveTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+  const isSavingRef = useRef(false);
+
+  useEffect(() => {
+    if (!ydoc) return;
+
+    const handleUpdate = (update: Uint8Array, origin: any) => {
+      // Ignore updates from initial sync or remote sources
+      if (origin === 'init' || origin === 'remote') return;
+
+      // Clear existing timeout
+      if (saveTimeoutRef.current) {
+        clearTimeout(saveTimeoutRef.current);
+      }
+
+      // Set new timeout: save 2 seconds after last edit
+      saveTimeoutRef.current = setTimeout(async () => {
+        if (isSavingRef.current) return; // Prevent concurrent saves
+
+        isSavingRef.current = true;
+        try {
+          const state = Y.encodeStateAsUpdate(ydoc);
+          await documentsApi.updateState(documentId, state);
+          console.log('✓ Document saved to database');
+        } catch (error) {
+          console.error('Failed to save document:', error);
+        } finally {
+          isSavingRef.current = false;
+        }
+      }, 2000); // 2 second debounce
+    };
+
+    ydoc.on('update', handleUpdate);
+
+    // Cleanup
+    return () => {
+      ydoc.off('update', handleUpdate);
+      if (saveTimeoutRef.current) {
+        clearTimeout(saveTimeoutRef.current);
+      }
+    };
+  }, [documentId, ydoc]);
+};
diff --git a/frontend/src/hooks/useYjsDocument.ts b/frontend/src/hooks/useYjsDocument.ts
new file mode 100644
index 0000000..dd02874
--- /dev/null
+++ b/frontend/src/hooks/useYjsDocument.ts
@@ -0,0 +1,63 @@
+import { useEffect, useState } from "react";
+import {
+    createYjsDocument,
+    destroyYjsDocument,
+    getRandomColor,
+    getRandomName,
+    type YjsProviders,
+} from "../lib/yjs";
+import { useAutoSave } from "./useAutoSave";
+
+export const useYjsDocument = (documentId: string) => {
+  const [providers, setProviders] = useState<YjsProviders | null>(null);
+  const [synced, setSynced] = useState(false);
+
+  // Enable auto-save when providers are ready
+  useAutoSave(documentId, providers?.ydoc || null);
+
+  useEffect(() => {
+    let mounted = true;
+    let currentProviders: YjsProviders | null = null;
+
+    // Create Yjs document and providers
+    const initializeDocument = async () => {
+      const yjsProviders = await createYjsDocument(documentId);
+      currentProviders = yjsProviders;
+
+      if (!mounted) {
+        destroyYjsDocument(yjsProviders);
+        return;
+      }
+
+      // Set user info for awareness
+      yjsProviders.awareness.setLocalStateField("user", {
+        name: getRandomName(),
+        color: getRandomColor(),
+      });
+
+      // Listen for sync status
+      yjsProviders.indexeddbProvider.on("synced", () => {
+        console.log("IndexedDB synced");
+        setSynced(true);
+      });
+
+      yjsProviders.websocketProvider.on("status", (event: { status: string }) => {
+        console.log("WebSocket status:", event.status);
+      });
+
+      setProviders(yjsProviders);
+    };
+
+    initializeDocument();
+
+    // Cleanup on unmount
+    return () => {
+      mounted = false;
+      if (currentProviders) {
+        destroyYjsDocument(currentProviders);
+      }
+    };
+  }, [documentId]);
+
+  return { providers, synced };
+};
diff --git a/frontend/src/index.css b/frontend/src/index.css
new file mode 100644
index 0000000..baebcad
--- /dev/null
+++ b/frontend/src/index.css
@@ -0,0 +1,604 @@
+* {
+    box-sizing: border-box;
+    margin: 0;
+    padding: 0;
+  }
+
+  :root {
+    /* Vibrant Fantasy Color Palette */
+    --pixel-purple-deep: #4A1B6F;
+    --pixel-purple-bright: #8B4FB9;
+    --pixel-pink-vibrant: #FF6EC7;
+    --pixel-cyan-bright: #00D9FF;
+    --pixel-orange-warm: #FF8E3C;
+    --pixel-yellow-gold: #FFD23F;
+    --pixel-green-lime: #8EF048;
+    --pixel-green-forest: #3FA54D;
+
+    /* UI Backgrounds & Neutrals */
+    --pixel-bg-dark: #2B1B38;
+    --pixel-bg-medium: #4A3B5C;
+    --pixel-bg-light: #E8D9F3;
+    --pixel-panel: #F5F0FF;
+    --pixel-white: #FFFFFF;
+
+    /* Shadows & Outlines */
+    --pixel-shadow-dark: #1A0E28;
+    --pixel-outline: #2B1B38;
+
+    /* Text Colors */
+    --pixel-text-primary: #2B1B38;
+    --pixel-text-secondary: #4A3B5C;
+    --pixel-text-muted: #8B7B9C;
+  }
+
+  body {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+      'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+      sans-serif;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    background: var(--pixel-bg-light);
+    background-image: url('/pixel-patterns.svg#pixel-checker-subtle');
+  }
+
+  #root {
+    min-height: 100vh;
+  }
+
+  /* Pixel Art Utility Classes */
+  .pixel-border {
+    border: 3px solid var(--pixel-outline);
+    box-shadow:
+      4px 4px 0 var(--pixel-shadow-dark),
+      4px 4px 0 3px var(--pixel-outline);
+  }
+
+  .pixel-card {
+    border: 3px solid var(--pixel-outline);
+    box-shadow:
+      0 0 0 3px var(--pixel-outline),
+      6px 6px 0 var(--pixel-shadow-dark),
+      6px 6px 0 3px var(--pixel-outline);
+    transition: transform 0.1s ease, box-shadow 0.1s ease;
+  }
+
+  .pixel-card:hover {
+    transform: translate(-2px, -2px);
+    box-shadow:
+      0 0 0 3px var(--pixel-outline),
+      8px 8px 0 var(--pixel-shadow-dark),
+      8px 8px 0 3px var(--pixel-outline);
+  }
+
+  .pixel-button {
+    border: 3px solid var(--pixel-outline);
+    box-shadow:
+      4px 4px 0 var(--pixel-shadow-dark);
+    transition: transform 0.05s ease, box-shadow 0.05s ease;
+    cursor: pointer;
+  }
+
+  .pixel-button:hover {
+    transform: translate(-1px, -1px);
+    box-shadow:
+      5px 5px 0 var(--pixel-shadow-dark);
+  }
+
+  .pixel-button:active {
+    transform: translate(2px, 2px);
+    box-shadow:
+      2px 2px 0 var(--pixel-shadow-dark);
+  }
+
+  /* Focus states for accessibility */
+  button:focus-visible,
+  input:focus-visible {
+    outline: 3px solid var(--pixel-yellow-gold);
+    outline-offset: 2px;
+  }
+
+  /* Reduced motion support */
+  @media (prefers-reduced-motion: reduce) {
+    *,
+    *::before,
+    *::after {
+      animation-duration: 0.01ms !important;
+      animation-iteration-count: 1 !important;
+      transition-duration: 0.01ms !important;
+    }
+  }
+
+  /* Pixel Icon Styles */
+  .pixel-icon {
+    display: inline-block;
+    vertical-align: middle;
+  }
+
+  .pixel-icon-animated {
+    animation: pixel-spin 1s steps(8) infinite;
+  }
+
+  /* Keyframe Animations */
+  @keyframes pixel-spin {
+    from { transform: rotate(0deg); }
+    to { transform: rotate(360deg); }
+  }
+
+  @keyframes pixel-float {
+    0%, 100% { transform: translateY(0) rotate(0deg); }
+    25% { transform: translateY(-12px) rotate(2deg); }
+    50% { transform: translateY(-8px) rotate(0deg); }
+    75% { transform: translateY(-12px) rotate(-2deg); }
+  }
+
+  @keyframes pixel-bounce {
+    0%, 100% { transform: translateY(0); }
+    50% { transform: translateY(-16px); }
+  }
+
+  @keyframes pixel-sparkle {
+    0% { transform: scale(0) rotate(0deg); opacity: 1; }
+    50% { transform: scale(1.5) rotate(180deg); opacity: 0.6; }
+    100% { transform: scale(0) rotate(360deg); opacity: 0; }
+  }
+
+  @keyframes pixel-pulse {
+    0%, 100% { opacity: 1; transform: scale(1); }
+    50% { opacity: 0.7; transform: scale(1.1); }
+  }
+
+  /* Home Page */
+  .home-page {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 2rem;
+  }
+
+  .home-page h1 {
+    margin-bottom: 2rem;
+  }
+
+  .create-buttons {
+    display: flex;
+    gap: 1rem;
+    margin-bottom: 2rem;
+  }
+
+  .create-buttons button {
+    padding: 0.75rem 1.5rem;
+    background: var(--pixel-purple-bright);
+    color: white;
+    border: 3px solid var(--pixel-outline);
+    border-radius: 0;
+    cursor: pointer;
+    font-size: 1rem;
+    font-weight: 600;
+    box-shadow: 4px 4px 0 var(--pixel-shadow-dark);
+    transition: transform 0.05s ease, box-shadow 0.05s ease;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+  }
+
+  .create-buttons button:hover {
+    background: var(--pixel-purple-deep);
+    transform: translate(-1px, -1px);
+    box-shadow: 5px 5px 0 var(--pixel-shadow-dark);
+  }
+
+  .create-buttons button:active {
+    transform: translate(2px, 2px);
+    box-shadow: 2px 2px 0 var(--pixel-shadow-dark);
+  }
+
+  .create-buttons button:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+    transform: none;
+  }
+
+  .document-list {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
+    gap: 1rem;
+  }
+
+  .document-card {
+    background: var(--pixel-white);
+    padding: 1.5rem;
+    border-radius: 0;
+    border: 3px solid var(--pixel-outline);
+    box-shadow:
+      6px 6px 0 var(--pixel-shadow-dark),
+      6px 6px 0 3px var(--pixel-outline);
+    transition: transform 0.1s ease, box-shadow 0.1s ease;
+  }
+
+  .document-card:hover {
+    transform: translate(-2px, -2px);
+    box-shadow:
+      8px 8px 0 var(--pixel-shadow-dark),
+      8px 8px 0 3px var(--pixel-outline);
+  }
+
+  .doc-info h3 {
+    margin-bottom: 0.5rem;
+  }
+
+  .doc-type {
+    color: var(--pixel-text-secondary);
+    text-transform: capitalize;
+    margin-bottom: 0.5rem;
+  }
+
+  .doc-date {
+    color: var(--pixel-text-muted);
+    font-size: 0.875rem;
+  }
+
+  .doc-actions {
+    display: flex;
+    gap: 0.5rem;
+    margin-top: 1rem;
+  }
+
+  .doc-actions button {
+    padding: 0.5rem 1rem;
+    border: 3px solid var(--pixel-outline);
+    background: var(--pixel-white);
+    border-radius: 0;
+    cursor: pointer;
+    min-width: 44px;
+    min-height: 44px;
+    box-shadow: 3px 3px 0 var(--pixel-shadow-dark);
+    transition: transform 0.05s ease, box-shadow 0.05s ease;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+  }
+
+  .doc-actions button:hover {
+    transform: translate(-1px, -1px);
+    box-shadow: 4px 4px 0 var(--pixel-shadow-dark);
+  }
+
+  .doc-actions button:active {
+    transform: translate(1px, 1px);
+    box-shadow: 2px 2px 0 var(--pixel-shadow-dark);
+  }
+
+  .doc-actions button:first-child {
+    background: var(--pixel-cyan-bright);
+    color: white;
+    border-color: var(--pixel-outline);
+  }
+
+  .doc-actions button:first-child:hover {
+    background: var(--pixel-purple-bright);
+  }
+
+  /* Editor Page */
+  .editor-page, .kanban-page {
+    display: flex;
+    flex-direction: column;
+    height: 100vh;
+  }
+
+  .page-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 1rem;
+    background: var(--pixel-white);
+    border-bottom: 3px solid var(--pixel-outline);
+  }
+
+  .page-header button {
+    padding: 0.5rem 1rem;
+    background: var(--pixel-panel);
+    border: 3px solid var(--pixel-outline);
+    border-radius: 0;
+    cursor: pointer;
+    min-width: 44px;
+    min-height: 44px;
+    box-shadow: 3px 3px 0 var(--pixel-shadow-dark);
+    transition: transform 0.05s ease, box-shadow 0.05s ease;
+  }
+
+  .page-header button:hover {
+    background: var(--pixel-bg-light);
+    transform: translate(-1px, -1px);
+    box-shadow: 4px 4px 0 var(--pixel-shadow-dark);
+  }
+
+  .page-header button:active {
+    transform: translate(1px, 1px);
+    box-shadow: 2px 2px 0 var(--pixel-shadow-dark);
+  }
+
+  .sync-status {
+    color: var(--pixel-text-secondary);
+    font-size: 0.875rem;
+  }
+
+  .page-content {
+    display: flex;
+    flex: 1;
+    overflow: hidden;
+  }
+
+  .main-area {
+    flex: 1;
+    overflow: auto;
+    padding: 2rem;
+  }
+
+  .sidebar {
+    width: 250px;
+    background: var(--pixel-white);
+    background-image: url('/pixel-patterns.svg#pixel-scanlines');
+    border-left: 3px solid var(--pixel-outline);
+    padding: 1rem;
+  }
+
+  /* Editor */
+  .editor-container {
+    background: var(--pixel-white);
+    border-radius: 0;
+    border: 3px solid var(--pixel-outline);
+    box-shadow:
+      6px 6px 0 var(--pixel-shadow-dark),
+      6px 6px 0 3px var(--pixel-outline);
+    overflow: hidden;
+  }
+
+  .toolbar {
+    display: flex;
+    gap: 0.5rem;
+    padding: 0.75rem;
+    background: var(--pixel-panel);
+    background-image: url('/pixel-patterns.svg#pixel-panel-texture');
+    border-bottom: 3px solid var(--pixel-outline);
+    flex-wrap: wrap;
+  }
+
+  .toolbar button {
+    padding: 0.5rem 0.75rem;
+    background: var(--pixel-white);
+    border: 3px solid var(--pixel-outline);
+    border-radius: 0;
+    cursor: pointer;
+    min-width: 44px;
+    min-height: 44px;
+    box-shadow: 3px 3px 0 var(--pixel-shadow-dark);
+    transition: transform 0.05s ease, box-shadow 0.05s ease;
+  }
+
+  .toolbar button:hover {
+    background: var(--pixel-bg-light);
+    transform: translate(-1px, -1px);
+    box-shadow: 4px 4px 0 var(--pixel-shadow-dark);
+  }
+
+  .toolbar button:active {
+    transform: translate(1px, 1px);
+    box-shadow: 2px 2px 0 var(--pixel-shadow-dark);
+  }
+
+  .toolbar button.active {
+    background: var(--pixel-cyan-bright);
+    color: white;
+    border-color: var(--pixel-outline);
+    box-shadow: 2px 2px 0 var(--pixel-shadow-dark);
+    transform: translate(1px, 1px);
+  }
+
+  .editor-content {
+    padding: 2rem;
+    min-height: 500px;
+  }
+
+  .ProseMirror {
+    outline: none;
+  }
+
+  .ProseMirror h1 {
+    font-size: 2rem;
+    margin: 1rem 0;
+  }
+
+  .ProseMirror h2 {
+    font-size: 1.5rem;
+    margin: 1rem 0;
+  }
+
+  .ProseMirror p {
+    margin: 0.5rem 0;
+  }
+
+  .ProseMirror ul, .ProseMirror ol {
+    margin-left: 1.5rem;
+  }
+
+  /* Collaborative Cursors */
+  .collaboration-cursor__caret {
+    position: absolute;
+    border-left: 2px solid;
+    border-right: none;
+    margin-left: -1px;
+    margin-right: -1px;
+    pointer-events: none;
+    word-break: normal;
+  }
+
+  .collaboration-cursor__label {
+    position: absolute;
+    top: -1.4em;
+    left: -1px;
+    font-size: 12px;
+    font-style: normal;
+    font-weight: 600;
+    line-height: normal;
+    user-select: none;
+    color: #fff;
+    padding: 2px 6px;
+    border-radius: 0;
+    white-space: nowrap;
+    box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.3);
+  }
+
+  /* Kanban Board */
+  .kanban-board {
+    display: flex;
+    gap: 1rem;
+    overflow-x: auto;
+    padding-bottom: 1rem;
+  }
+
+  .kanban-column {
+    background: var(--pixel-panel);
+    background-image: url('/pixel-patterns.svg#pixel-dither-diagonal');
+    border-radius: 0;
+    border: 3px solid var(--pixel-outline);
+    padding: 1rem;
+    min-width: 300px;
+    max-width: 300px;
+  }
+
+  .column-title {
+    margin-bottom: 1rem;
+    font-size: 1.125rem;
+  }
+
+  .column-content {
+    display: flex;
+    flex-direction: column;
+    gap: 0.75rem;
+  }
+
+  .kanban-card {
+    background: var(--pixel-white);
+    padding: 1rem;
+    border-radius: 0;
+    border: 3px solid var(--pixel-outline);
+    box-shadow:
+      4px 4px 0 var(--pixel-shadow-dark),
+      4px 4px 0 3px var(--pixel-outline);
+    cursor: pointer;
+    transition: transform 0.1s ease, box-shadow 0.1s ease;
+  }
+
+  .kanban-card:hover {
+    transform: translate(-1px, -1px);
+    box-shadow:
+      5px 5px 0 var(--pixel-shadow-dark),
+      5px 5px 0 3px var(--pixel-outline);
+  }
+
+  .kanban-card h4 {
+    margin-bottom: 0.5rem;
+  }
+
+  .kanban-card p {
+    color: var(--pixel-text-secondary);
+    font-size: 0.875rem;
+  }
+
+  .add-task-btn {
+    padding: 0.75rem;
+    background: var(--pixel-white);
+    border: 3px dashed var(--pixel-outline);
+    border-radius: 0;
+    cursor: pointer;
+    color: var(--pixel-text-secondary);
+  }
+
+  .add-task-btn:hover {
+    border-color: var(--pixel-purple-bright);
+    color: var(--pixel-text-primary);
+    background: var(--pixel-bg-light);
+  }
+
+  .add-task-form input {
+    width: 100%;
+    padding: 0.75rem;
+    border: 2px solid var(--pixel-outline);
+    border-radius: 0;
+    margin-bottom: 0.5rem;
+    background: var(--pixel-white);
+  }
+
+  .add-task-form input:focus {
+    outline: none;
+    border-color: var(--pixel-cyan-bright);
+    box-shadow: 0 0 0 2px var(--pixel-cyan-bright);
+  }
+
+  .form-actions {
+    display: flex;
+    gap: 0.5rem;
+  }
+
+  .form-actions button {
+    padding: 0.5rem 1rem;
+    border: 3px solid var(--pixel-outline);
+    border-radius: 0;
+    cursor: pointer;
+    background: var(--pixel-white);
+    box-shadow: 3px 3px 0 var(--pixel-shadow-dark);
+    transition: transform 0.05s ease, box-shadow 0.05s ease;
+  }
+
+  .form-actions button:hover {
+    transform: translate(-1px, -1px);
+    box-shadow: 4px 4px 0 var(--pixel-shadow-dark);
+  }
+
+  .form-actions button:active {
+    transform: translate(1px, 1px);
+    box-shadow: 2px 2px 0 var(--pixel-shadow-dark);
+  }
+
+  .form-actions button:first-child {
+    background: var(--pixel-green-lime);
+    color: var(--pixel-text-primary);
+    border-color: var(--pixel-outline);
+  }
+
+  /* User List */
+  .user-list h4 {
+    margin-bottom: 1rem;
+  }
+
+  .users {
+    display: flex;
+    flex-direction: column;
+    gap: 0.75rem;
+  }
+
+  .user {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+  }
+
+  .user-color {
+    width: 12px;
+    height: 12px;
+    border-radius: 0;
+    border: 1px solid var(--pixel-outline);
+  }
+
+  .user-name {
+    font-size: 0.875rem;
+  }
+
+  .loading {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+    font-size: 1.25rem;
+    color: var(--pixel-text-secondary);
+  }
diff --git a/frontend/src/lib/yjs.ts b/frontend/src/lib/yjs.ts
new file mode 100644
index 0000000..4f8d75a
--- /dev/null
+++ b/frontend/src/lib/yjs.ts
@@ -0,0 +1,75 @@
+import { IndexeddbPersistence } from "y-indexeddb";
+import { WebsocketProvider } from "y-websocket";
+import * as Y from "yjs";
+import { documentsApi } from "../api/document";
+
+const WS_URL = import.meta.env.VITE_WS_URL || "ws://localhost:8080/ws";
+
+export interface YjsProviders {
+  ydoc: Y.Doc;
+  websocketProvider: WebsocketProvider;
+  indexeddbProvider: IndexeddbPersistence;
+  awareness: any;
+}
+
+export const createYjsDocument = async (documentId: string): Promise<YjsProviders> => {
+  // Create Yjs document
+  const ydoc = new Y.Doc();
+
+  // Load initial state from database BEFORE connecting providers
+  try {
+    const state = await documentsApi.getState(documentId);
+    if (state && state.length > 0) {
+      Y.applyUpdate(ydoc, state);
+      console.log('✓ Loaded document state from database');
+    }
+  } catch {
+    console.log('No existing state in database (new document)');
+  }
+
+  // IndexedDB persistence (offline support)
+  const indexeddbProvider = new IndexeddbPersistence(documentId, ydoc);
+
+  // WebSocket provider (real-time sync)
+  const websocketProvider = new WebsocketProvider(WS_URL, documentId, ydoc);
+
+  // Awareness for cursors and presence
+  const awareness = websocketProvider.awareness;
+
+  return {
+    ydoc,
+    websocketProvider,
+    indexeddbProvider,
+    awareness,
+  };
+};
+
+export const destroyYjsDocument = (providers: YjsProviders) => {
+  providers.websocketProvider.destroy();
+  providers.indexeddbProvider.destroy();
+  providers.ydoc.destroy();
+};
+
+// Random color generator for users
+export const getRandomColor = () => {
+  const colors = [
+    "#FF6B6B",
+    "#4ECDC4",
+    "#45B7D1",
+    "#FFA07A",
+    "#98D8C8",
+    "#F7DC6F",
+    "#BB8FCE",
+    "#85C1E2",
+  ];
+  return colors[Math.floor(Math.random() * colors.length)];
+};
+
+// Random name generator
+export const getRandomName = () => {
+  const adjectives = ["Happy", "Clever", "Brave", "Swift", "Kind"];
+  const animals = ["Panda", "Fox", "Wolf", "Bear", "Eagle"];
+  return `${adjectives[Math.floor(Math.random() * adjectives.length)]} ${
+    animals[Math.floor(Math.random() * animals.length)]
+  }`;
+};
diff --git a/frontend/src/main.tsx b/frontend/src/main.tsx
new file mode 100644
index 0000000..966f17a
--- /dev/null
+++ b/frontend/src/main.tsx
@@ -0,0 +1,10 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+import App from "./App.tsx";
+import "./index.css";
+
+ReactDOM.createRoot(document.getElementById("root")!).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>
+);
diff --git a/frontend/src/pages/EditorPage.tsx b/frontend/src/pages/EditorPage.tsx
new file mode 100644
index 0000000..91b087b
--- /dev/null
+++ b/frontend/src/pages/EditorPage.tsx
@@ -0,0 +1,36 @@
+import { useNavigate, useParams } from "react-router-dom";
+import Editor from "../components/Editor/Editor.tsx";
+import UserList from "../components/Presence/UserList.tsx";
+import { useYjsDocument } from "../hooks/useYjsDocument.ts";
+
+const EditorPage = () => {
+  const { id } = useParams<{ id: string }>();
+  const navigate = useNavigate();
+  const { providers, synced } = useYjsDocument(id!);
+
+  if (!providers) {
+    return <div className="loading">Connecting...</div>;
+  }
+
+  return (
+    <div className="editor-page">
+      <div className="page-header">
+        <button onClick={() => navigate("/")}>← Back to Home</button>
+        <div className="sync-status">
+          {synced ? "✓ Synced" : "⟳ Syncing..."}
+        </div>
+      </div>
+
+      <div className="page-content">
+        <div className="main-area">
+          <Editor providers={providers} />
+        </div>
+        <div className="sidebar">
+          <UserList awareness={providers.awareness} />
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default EditorPage;
diff --git a/frontend/src/pages/Home.tsx b/frontend/src/pages/Home.tsx
new file mode 100644
index 0000000..7e350c6
--- /dev/null
+++ b/frontend/src/pages/Home.tsx
@@ -0,0 +1,112 @@
+import { useEffect, useState } from "react";
+import { useNavigate } from "react-router-dom";
+import type { DocumentType } from "../api/document.ts";
+import { documentsApi } from "../api/document.ts";
+import PixelIcon from "../components/PixelIcon/PixelIcon.tsx";
+import FloatingGem from "../components/PixelSprites/FloatingGem.tsx";
+
+const Home = () => {
+  const [documents, setDocuments] = useState<DocumentType[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [creating, setCreating] = useState(false);
+  const navigate = useNavigate();
+
+  const loadDocuments = async () => {
+    try {
+      const { documents } = await documentsApi.list();
+      setDocuments(documents);
+    } catch (error) {
+      console.error("Failed to load documents:", error);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    loadDocuments();
+  }, []);
+
+  const createDocument = async (type: "editor" | "kanban") => {
+    setCreating(true);
+    try {
+      const doc = await documentsApi.create({
+        name: `New ${type === "editor" ? "Document" : "Kanban Board"}`,
+        type,
+      });
+      navigate(`/${type}/${doc.id}`);
+    } catch (error) {
+      console.error("Failed to create document:", error);
+    } finally {
+      setCreating(false);
+    }
+  };
+
+  const deleteDocument = async (id: string) => {
+    if (!confirm("Are you sure you want to delete this document?")) return;
+
+    try {
+      await documentsApi.delete(id);
+      loadDocuments();
+    } catch (error) {
+      console.error("Failed to delete document:", error);
+    }
+  };
+
+  if (loading) {
+    return <div className="loading">Loading documents...</div>;
+  }
+
+  return (
+    <div className="home-page" style={{ position: 'relative' }}>
+      <FloatingGem position={{ top: '20px', right: '40px' }} delay={0} size={40} />
+      <FloatingGem position={{ top: '60px', left: '60px' }} delay={1.5} size={32} />
+      <FloatingGem position={{ bottom: '100px', right: '100px' }} delay={3} size={36} />
+
+      <h1>My Documents</h1>
+
+      <div className="create-buttons">
+        <button onClick={() => createDocument("editor")} disabled={creating}>
+          <PixelIcon name="plus" size={20} />
+          <span style={{ marginLeft: '8px' }}>New Text Document</span>
+        </button>
+        <button onClick={() => createDocument("kanban")} disabled={creating}>
+          <PixelIcon name="plus" size={20} />
+          <span style={{ marginLeft: '8px' }}>New Kanban Board</span>
+        </button>
+      </div>
+
+      <div className="document-list">
+        {documents.length === 0 ? (
+          <p>No documents yet. Create one to get started!</p>
+        ) : (
+          documents.map((doc) => (
+            <div key={doc.id} className="document-card">
+              <div className="doc-info">
+                <div style={{ display: 'flex', alignItems: 'center', gap: '8px', marginBottom: '8px' }}>
+                  <PixelIcon name={doc.type === 'editor' ? 'document' : 'kanban'} size={24} color="var(--pixel-purple-bright)" />
+                  <h3 style={{ margin: 0 }}>{doc.name}</h3>
+                </div>
+                <p className="doc-type">{doc.type}</p>
+                <p className="doc-date">
+                  Created: {new Date(doc.created_at).toLocaleDateString()}
+                </p>
+              </div>
+              <div className="doc-actions">
+                <button onClick={() => navigate(`/${doc.type}/${doc.id}`)} aria-label={`Open ${doc.name}`}>
+                  <PixelIcon name="back-arrow" size={16} style={{ transform: 'rotate(180deg)' }} />
+                  <span style={{ marginLeft: '6px' }}>Open</span>
+                </button>
+                <button onClick={() => deleteDocument(doc.id)} aria-label={`Delete ${doc.name}`}>
+                  <PixelIcon name="trash" size={16} />
+                  <span style={{ marginLeft: '6px' }}>Delete</span>
+                </button>
+              </div>
+            </div>
+          ))
+        )}
+      </div>
+    </div>
+  );
+};
+
+export default Home;
diff --git a/frontend/src/pages/KanbanPage.tsx b/frontend/src/pages/KanbanPage.tsx
new file mode 100644
index 0000000..91ed887
--- /dev/null
+++ b/frontend/src/pages/KanbanPage.tsx
@@ -0,0 +1,36 @@
+import { useNavigate, useParams } from "react-router-dom";
+import KanbanBoard from "../components/Kanban/KanbanBoard.tsx";
+import UserList from "../components/Presence/UserList.tsx";
+import { useYjsDocument } from "../hooks/useYjsDocument.ts";
+
+const KanbanPage = () => {
+  const { id } = useParams<{ id: string }>();
+  const navigate = useNavigate();
+  const { providers, synced } = useYjsDocument(id!);
+
+  if (!providers) {
+    return <div className="loading">Connecting...</div>;
+  }
+
+  return (
+    <div className="kanban-page">
+      <div className="page-header">
+        <button onClick={() => navigate("/")}>← Back to Home</button>
+        <div className="sync-status">
+          {synced ? "✓ Synced" : "⟳ Syncing..."}
+        </div>
+      </div>
+
+      <div className="page-content">
+        <div className="main-area">
+          <KanbanBoard providers={providers} />
+        </div>
+        <div className="sidebar">
+          <UserList awareness={providers.awareness} />
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default KanbanPage;
diff --git a/frontend/tsconfig.app.json b/frontend/tsconfig.app.json
new file mode 100644
index 0000000..a9b5a59
--- /dev/null
+++ b/frontend/tsconfig.app.json
@@ -0,0 +1,28 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "types": ["vite/client"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"]
+}
diff --git a/frontend/tsconfig.json b/frontend/tsconfig.json
new file mode 100644
index 0000000..1ffef60
--- /dev/null
+++ b/frontend/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}
diff --git a/frontend/tsconfig.node.json b/frontend/tsconfig.node.json
new file mode 100644
index 0000000..8a67f62
--- /dev/null
+++ b/frontend/tsconfig.node.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
new file mode 100644
index 0000000..8b0f57b
--- /dev/null
+++ b/frontend/vite.config.ts
@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+})