feat: Add multi-canvas system with project canvas support

- Add project_canvas and canvas_components tables for persistent canvas storage
- Add ProjectCanvas store with full CRUD operations
- Add ProjectCanvasPage for rendering saved canvas with components
- Add ProjectsPage for managing canvas list (create, clone, delete)
- Add HomePage that loads default canvas or falls back to dynamic canvas
- Add toolbar support for displaying canvas as pages with custom icons
- Add component usage validation to prevent deletion of components in use
- Add MCP tools for canvas management (list, create, update, delete, clone)
- Update router with /canvas/:id and /projects routes
- Update Toolbar to show dynamic canvas pages from database

frontend/src/services/toolRegistry.ts

@@ -19,8 +19,13 @@ import {
   setRouter,
   GLOBAL_TOOLS
 } from './tools/globalTools'
+import {
+  registerProjectCanvasTools,
+  unregisterProjectCanvasTools,
+  PROJECT_CANVAS_TOOLS
+} from './tools/projectCanvasTools'
 
-type PageName = 'canvas' | 'components' | 'themes'
+type PageName = 'home' | 'canvas' | 'components' | 'themes' | 'projects' | 'project-canvas'
 
 interface PageToolSet {
   register: () => void
@@ -29,10 +34,23 @@ interface PageToolSet {
 }
 
 const pageTools: Record<PageName, PageToolSet> = {
+  home: {
+    register: () => {
+      registerCanvasTools()
+      registerComponentTools()
+      registerProjectCanvasTools()
+    },
+    unregister: () => {
+      unregisterCanvasTools()
+      unregisterComponentTools()
+      unregisterProjectCanvasTools()
+    },
+    toolNames: [...CANVAS_TOOLS, ...COMPONENT_TOOLS, ...PROJECT_CANVAS_TOOLS]
+  },
   canvas: {
     register: () => {
       registerCanvasTools()
-      registerComponentTools() // Canvas también puede guardar/cargar
+      registerComponentTools()
     },
     unregister: () => {
       unregisterCanvasTools()
@@ -40,6 +58,24 @@ const pageTools: Record<PageName, PageToolSet> = {
     },
     toolNames: [...CANVAS_TOOLS, ...COMPONENT_TOOLS]
   },
+  'project-canvas': {
+    register: () => {
+      registerCanvasTools()
+      registerComponentTools()
+      registerProjectCanvasTools()
+    },
+    unregister: () => {
+      unregisterCanvasTools()
+      unregisterComponentTools()
+      unregisterProjectCanvasTools()
+    },
+    toolNames: [...CANVAS_TOOLS, ...COMPONENT_TOOLS, ...PROJECT_CANVAS_TOOLS]
+  },
+  projects: {
+    register: registerProjectCanvasTools,
+    unregister: unregisterProjectCanvasTools,
+    toolNames: PROJECT_CANVAS_TOOLS
+  },
   components: {
     register: registerComponentTools,
     unregister: unregisterComponentTools,