docs: update README, deployment guide, and dashboard docs

DASHBOARD_README.md

@@ -6,37 +6,43 @@ This is a comprehensive admin dashboard for the LLM Proxy Gateway, providing rea
 
 ## Features
 
-### 1. **Dashboard Overview**
+### 1. Dashboard Overview
 - Real-time request counters and statistics
 - System health indicators
 - Provider status monitoring
 - Recent requests stream
 
-### 2. **Usage Analytics**
+### 2. Usage Analytics
 - Time series charts for requests, tokens, and costs
 - Filter by date range, client, provider, and model
 - Top clients and models analysis
 - Export functionality to CSV/JSON
 
-### 3. **Cost Management**
+### 3. Cost Management
 - Cost breakdown by provider, client, and model
 - Budget tracking with alerts
 - Cost projections
 - Pricing configuration management
 
-### 4. **Client Management**
+### 4. Client Management
 - List, create, revoke, and rotate API tokens
 - Client-specific rate limits
 - Usage statistics per client
 - Token management interface
 
-### 5. **Provider Configuration**
+### 5. Provider Configuration
 - Enable/disable LLM providers
 - Configure API keys (masked display)
 - Test provider connections
 - Model availability management
 
-### 6. **Real-time Monitoring**
+### 6. User Management (RBAC)
+- **Admin Role:** Full access to all dashboard features, user management, system configuration
+- **Viewer Role:** Read-only access to usage analytics, costs, and monitoring
+- Create/manage dashboard users with role assignment
+- Secure password management
+
+### 7. Real-time Monitoring
 - Live request stream via WebSocket
 - System metrics dashboard
 - Response time and error rate tracking
@@ -99,9 +105,16 @@ http://localhost:8080
 ### Clients
 - `GET /api/clients` - List all clients
 - `POST /api/clients` - Create new client
+- `PUT /api/clients/{id}` - Update client
 - `DELETE /api/clients/{id}` - Revoke client
 - `GET /api/clients/{id}/usage` - Client-specific usage
 
+### Users (RBAC)
+- `GET /api/users` - List all dashboard users
+- `POST /api/users` - Create new user
+- `PUT /api/users/{id}` - Update user (admin only)
+- `DELETE /api/users/{id}` - Delete user (admin only)
+
 ### Providers
 - `GET /api/providers` - List providers and status
 - `PUT /api/providers/{name}` - Update provider config