fix: handle both boolean and string types for settings

JSON.parse preserves native types, so boolean true/false stay as
booleans rather than strings. The previous check only handled string
'true', meaning users who set `"ENABLED": true` (boolean) wouldn't
have the feature work.

Now both `getBool()` helper and ResponseProcessor check handle:
- String 'true' → enabled
- Boolean true → enabled
- Any other value → disabled

Tested: Confirmed feature stays disabled with string "false" and
no new CLAUDE.md files are created when accessing directories.

src/shared/SettingsDefaultsManager.ts

@@ -124,10 +124,11 @@ export class SettingsDefaultsManager {
 
   /**
    * Get a boolean default value
+   * Handles both string 'true' and boolean true from JSON
    */
   static getBool(key: keyof SettingsDefaults): boolean {
     const value = this.get(key);
-    return value === 'true';
+    return value === 'true' || value === true;
   }
 
   /**