Fix IDE setup crash: yaml module not found in production

_base-ide.js required the 'yaml' package (devDependency only) instead of
'js-yaml' (production dependency), causing all IDE integrations to fail
during npx install. Also cleans up legacy _wds-learn/ during migration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://json.schemastore.org/package.json",
   "name": "whiteport-design-studio",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "description": "Whiteport Design Studio - Strategic design methodology for AI-powered workflows",
   "keywords": [
     "design",

tools/cli/installers/lib/ide/_base-ide.js

@@ -1,7 +1,7 @@
 const path = require('node:path');
 const fs = require('fs-extra');
 const chalk = require('chalk');
-const yaml = require('yaml');
+const yaml = require('js-yaml');
 
 /**
  * Base class for IDE-specific setup
@@ -138,7 +138,7 @@ class BaseIdeSetup {
       // Try to extract YAML frontmatter
       const frontmatterMatch = content.match(/^---\s*\n([\s\S]*?)\n---/);
       if (frontmatterMatch) {
-        const frontmatter = yaml.parse(frontmatterMatch[1]);
+        const frontmatter = yaml.load(frontmatterMatch[1]);
 
         return {
           name: frontmatter.name || path.basename(filePath, '.md'),

tools/cli/lib/installer.js

@@ -45,6 +45,13 @@ class Installer {
       const migrateSpinner = ora(`Migrating _wds/ → ${wdsFolder}/...`).start();
       await fs.ensureDir(path.dirname(wdsDir));
       await fs.remove(legacyDir);
+
+      // Also remove legacy _wds-learn/ (will be recreated if learning material is selected)
+      const legacyLearnDir = path.join(projectDir, '_wds-learn');
+      if (await fs.pathExists(legacyLearnDir)) {
+        await fs.remove(legacyLearnDir);
+      }
+
       migrateSpinner.succeed(`Legacy _wds/ removed — installing fresh at ${wdsFolder}/`);
     }