Add support for pulling Wiki docs into screen render

@@ -19,8 +19,9 @@
     <screen-factory load-path="screen/" />
     
      <!-- Load seed data -->
-    <entity-factory load-data="data/McpSecuritySeedData.xml" />
+     <entity-factory load-data="data/McpSecuritySeedData.xml" />
     <entity-factory load-data="data/McpPromptsData.xml" />
+    <entity-factory load-data="data/McpScreenDocsData.xml" />
 
     <!-- Webapp Configuration -->
     <webapp-list>

@@ -94,7 +94,8 @@ Use the following discovery tools to explore available functionality:
         versionName="v1">
         <fileData><![CDATA[# Moqui MCP Server
 
-This server provides access to Moqui ERP through MCP.
+This server provides access to Moqui ERP through MCP. Typically you will be searching for a product by name or by a feature like size or color.
+If it is a feature based query it is probably best to use the FindFeature screen to locate the feature and then use FindProduct to search for products with that feature.
 
 ## Getting Started
 

@@ -1335,11 +1335,11 @@ def wikiInstructions = getWikiInstructions(inputScreenPath)
                                     }
 
                                     if (dbResourceFile) {
-                                        ec.logger.info("BrowseScreens: dbResourceFile.fileData: ${dbResourceFile.fileData ? 'exists, size=' + dbResourceFile.fileData.length : 'null'}")
+                                        ec.logger.info("BrowseScreens: dbResourceFile.fileData: ${dbResourceFile.fileData ? 'exists, size=' + dbResourceFile.fileData.length() : 'null'}")
                                     }
 
                                     if (dbResourceFile && dbResourceFile.fileData) {
-                                        def content = new String(dbResourceFile.fileData, "UTF-8")
+                                        def content = new String(dbResourceFile.fileData.getBytes(new Long(1).longValue(), new Long(dbResourceFile.fileData.length()).intValue()), "UTF-8")
                                         ec.logger.info("BrowseScreens: Found wiki instructions for ${simplePath}, length: ${content?.length()}")
                                         return content
                                     }

@@ -16,8 +16,6 @@ package org.moqui.mcp
 import groovy.transform.CompileStatic
 import org.moqui.context.*
 import org.moqui.context.MessageFacade.MessageInfo
-import org.moqui.impl.context.ExecutionContextFactoryImpl
-import org.moqui.impl.context.ContextJavaUtil
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 
@@ -32,8 +30,8 @@ import java.util.EventListener
 @CompileStatic
 class WebFacadeStub implements WebFacade {
     protected final static Logger logger = LoggerFactory.getLogger(WebFacadeStub.class)
-    
-    protected final ExecutionContextFactoryImpl ecfi
+
+    protected final ExecutionContextFactory ecfi
     protected final Map<String, Object> parameters
     protected final Map<String, Object> sessionAttributes
     protected final String requestMethod
@@ -62,7 +60,7 @@ class WebFacadeStub implements WebFacade {
     protected Object responseJsonObj = null
     boolean skipJsonSerialize = false
     
-    WebFacadeStub(ExecutionContextFactoryImpl ecfi, Map<String, Object> parameters, 
+    WebFacadeStub(ExecutionContextFactory ecfi, Map<String, Object> parameters,
                    Map<String, Object> sessionAttributes, String requestMethod, String screenPath = null) {
         this.ecfi = ecfi
         this.parameters = parameters ?: [:]
@@ -233,7 +231,13 @@ class WebFacadeStub implements WebFacade {
     void sendJsonResponse(Object responseObj) {
         if (!skipJsonSerialize) {
             this.responseJsonObj = responseObj
-            this.responseText = ContextJavaUtil.jacksonMapper.writeValueAsString(responseObj)
+            try {
+                def mapper = new com.fasterxml.jackson.databind.ObjectMapper()
+                this.responseText = mapper.writeValueAsString(responseObj)
+            } catch (Exception e) {
+                logger.warn("Error serializing JSON: ${e.message}")
+                this.responseText = responseObj.toString()
+            }
         } else {
             this.responseJsonObj = responseObj
             this.responseText = responseObj.toString()