refactor: rename core.search to core.stringhelpers

src/core/core.stringhelpers.pas

@@ -1,5 +1,5 @@
 {
-    Core->Search - Reusable file-oriented search, sort, and format utilities.
+    Core->StringHelpers - Reusable file-oriented search, sort, and format utilities.
 
     Provides:
       - getFileExtension: zero-copy extension extraction
@@ -9,7 +9,7 @@
 
     @author(Aaron Hance <[email protected]>)
 }
-unit core.search;
+unit core.stringhelpers;
 
 interface
 

src/core/gfx/core.gfx.fileicons.pas

@@ -14,7 +14,7 @@ interface
 
 uses
     core.strings,
-    core.search;
+    core.stringhelpers;
 
 const
     { File-type icon PUA constants (U+E000..E078) — rendered by asuro_icons_* }