refactor: simplify webapplications folder detection

Replace case-insensitive regex with direct string comparison since
sf webapp generate always creates the folder as lowercase 'webapplications'.
Derive WEBAPPLICATIONS_FOLDER_NAME from SFDX_WEBAPPLICATIONS_PATH to
follow DRY principle.

Author: deepu-mungamuri94

src/config/webappDiscovery.ts

@@ -30,9 +30,9 @@ export const DEFAULT_DEV_COMMAND = 'npm run dev';
 const SFDX_WEBAPPLICATIONS_PATH = 'force-app/main/default/webapplications';
 
 /**
- * Pattern to match the webapplications folder (case-insensitive)
+ * The standard webapplications folder name (derived from SFDX path)
  */
-const WEBAPPLICATIONS_FOLDER_PATTERN = /^webapplications$/i;
+const WEBAPPLICATIONS_FOLDER_NAME = basename(SFDX_WEBAPPLICATIONS_PATH);
 
 /**
  * Pattern to match webapplication metadata XML files
@@ -85,10 +85,10 @@ function shouldExcludeDirectory(dirName: string): boolean {
 }
 
 /**
- * Check if a folder name matches "webapplications" (case-insensitive)
+ * Check if a folder name is the standard webapplications folder
  */
 function isWebapplicationsFolder(folderName: string): boolean {
-  return WEBAPPLICATIONS_FOLDER_PATTERN.test(folderName);
+  return folderName === WEBAPPLICATIONS_FOLDER_NAME;
 }
 
 /**