feat: Add ide-only and web-only menu item filtering for platform-specific commands

## Summary
- Add ide-only and web-only boolean fields to agent menu schema
- Filter menu items based on build target (web bundle vs local IDE)
- Update BMM agent definitions with platform restrictions and improved descriptions
- Update frame-expert agent icon to 📐 and add webskip flag

## Changes

### Schema & Bundler Updates
- tools/schema/agent.js: Add ide-only and web-only optional boolean fields
- tools/cli/lib/yaml-xml-builder.js: Filter ide-only items from web bundles
- tools/cli/lib/xml-handler.js: Pass forWebBundle flag through build chain

### Agent Updates
- frame-expert: Change icon to 📐, add webskip flag, improve principle formatting
- pm: Mark workflow-init and correct-course as ide-only, advanced-elicitation as web-only
- ux-designer: Rename trigger to create-ux-design, mark advanced-elicitation as web-only
- sm: Rename triggers for consistency (story-context → create-story-context)
- analyst: Add research workflow after brainstorm, mark advanced-elicitation as web-only
- architect: Remove document field from validate-architecture, add web-only flag
- dev: Update persona and critical actions for clarity
- tech-writer: Add party-mode workflow, mark advanced-elicitation as web-only
- tea: Mark advanced-elicitation as web-only
- All agents: Standardize party-mode description

This enables platform-specific functionality where some commands only make sense
in IDE environments (workflow-init) or web interfaces (advanced-elicitation).

tools/cli/lib/xml-handler.js

@@ -203,6 +203,7 @@ class XmlHandler {
         customizeHash: customizePath ? await this.yamlBuilder.calculateFileHash(customizePath) : null,
         builderVersion: '1.0.0',
         includeMetadata: metadata.includeMetadata !== false,
+        forWebBundle: metadata.forWebBundle || false, // Pass through forWebBundle flag
       };
 
       // Convert to XML

tools/cli/lib/yaml-xml-builder.js

@@ -209,7 +209,7 @@ class YamlXmlBuilder {
 
     // Menu section (support both 'menu' and legacy 'commands')
     const menuItems = agent.menu || agent.commands || [];
-    xml += this.buildCommandsXml(menuItems);
+    xml += this.buildCommandsXml(menuItems, buildMetadata.forWebBundle);
 
     xml += '</agent>\n';
     xml += '```\n';
@@ -310,8 +310,10 @@ class YamlXmlBuilder {
   /**
    * Build menu XML section (renamed from commands for clarity)
    * Auto-injects *help and *exit, adds * prefix to all triggers
+   * @param {Array} menuItems - Menu items from YAML
+   * @param {boolean} forWebBundle - Whether building for web bundle
    */
-  buildCommandsXml(menuItems) {
+  buildCommandsXml(menuItems, forWebBundle = false) {
     let xml = '  <menu>\n';
 
     // Always inject *help first
@@ -320,6 +322,14 @@ class YamlXmlBuilder {
     // Add user-defined menu items with * prefix
     if (menuItems && menuItems.length > 0) {
       for (const item of menuItems) {
+        // Skip ide-only items when building for web bundles
+        if (forWebBundle && item['ide-only'] === true) {
+          continue;
+        }
+        // Skip web-only items when NOT building for web bundles (i.e., IDE/local installation)
+        if (!forWebBundle && item['web-only'] === true) {
+          continue;
+        }
         // Build command attributes - add * prefix if not present
         let trigger = item.trigger || '';
         if (!trigger.startsWith('*')) {