Fix broken navigation links and create redirect pages for /data-access and /server

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

docs/.vitepress/config.mts

@@ -54,7 +54,9 @@ const guideSidebar = [
   {
     text: 'Low-Code UI',
     items: [
-      { text: 'Page & Layouts', link: '/guide/page-metadata' },
+      { text: 'Pages & Layouts', link: '/spec/page' },
+      { text: 'Views', link: '/spec/view' },
+      { text: 'Forms', link: '/spec/form' },
     ]
   },
   {

docs/data-access.md

@@ -0,0 +1,30 @@
+# Data Access
+
+This page has been reorganized. Please visit:
+
+- **[Querying Data](/guide/querying)** - Learn how to query and access data using ObjectQL's JSON-based protocol
+- **[Query Best Practices](/guide/query-best-practices)** - Performance optimization and query strategies  
+- **[API Reference](/api/)** - Complete API documentation for data access
+- **[Query Language Specification](/spec/query-language)** - JSON-DSL query protocol specification
+
+## Quick Links
+
+### For Querying Data
+See the [Querying Data Guide](/guide/querying) for:
+- Find operations
+- Filters and conditions
+- Sorting and pagination
+- Field selection
+- Data expansion
+
+### For API Access
+See the [API Reference](/api/) for:
+- [JSON-RPC API](/api/json-rpc)
+- [REST API](/api/rest)
+- [GraphQL API](/api/graphql)
+- [Metadata API](/api/metadata)
+
+### For Advanced Topics
+- [Query Best Practices](/guide/query-best-practices) - Optimization strategies
+- [Query Language Spec](/spec/query-language) - Complete protocol specification
+- [Client SDK](/api/client-sdk) - TypeScript client for frontend apps

docs/server.md

@@ -0,0 +1,29 @@
+# Server Integration
+
+This page has been reorganized. Please visit:
+
+- **[Server Integration Guide](/guide/server-integration)** - Learn how to integrate ObjectQL with web servers and frameworks
+- **[API Reference](/api/)** - Complete API documentation
+- **[Authentication](/api/authentication)** - Securing your APIs
+- **[Custom Routes](/api/custom-routes)** - Adding custom endpoints
+
+## Quick Links
+
+### For Server Setup
+See the [Server Integration Guide](/guide/server-integration) for:
+- Express integration
+- Next.js setup
+- HTTP API exposure
+- REST, JSON-RPC, and GraphQL endpoints
+- Middleware configuration
+
+### For API Configuration
+- [Authentication & Authorization](/api/authentication) - Secure your APIs
+- [Error Handling](/api/error-handling) - Response formats and error codes
+- [Rate Limiting](/api/rate-limiting) - Protect against abuse
+- [Custom API Routes](/api/custom-routes) - Extend with custom handlers
+
+### For Deployment
+- [Configuration Guide](/guide/configuration) - Application configuration
+- [Database Drivers](/guide/drivers/) - Connecting to databases
+- [CLI Tools](/guide/cli) - Command-line interface