chore: update code structure for better readability and maintainability

fixes: fixt rendedring of icons and swe texts

src/file_ops.rs

@@ -49,6 +49,35 @@ impl FileEntry {
         }
     }
 
+    /// ASCII fallback icons for terminals that don't support emoji (e.g. SSH with limited fonts)
+    pub fn icon_ascii(&self) -> &'static str {
+        match &self.file_type {
+            FileType::Directory => "[/]",
+            FileType::Symlink   => "[~]",
+            FileType::File => {
+                let ext = self
+                    .name
+                    .rsplit('.')
+                    .next()
+                    .unwrap_or("")
+                    .to_lowercase();
+                match ext.as_str() {
+                    "rs" | "py" | "js" | "ts" | "c" | "cpp" | "h" | "hpp"
+                    | "sh" | "bash" | "zsh" | "fish" => "[s]",
+                    "png" | "jpg" | "jpeg" | "gif" | "bmp" | "svg" | "webp" | "ico" => "[i]",
+                    "mp4" | "mkv" | "avi" | "mov" | "webm" => "[v]",
+                    "mp3" | "flac" | "ogg" | "wav" | "aac" => "[a]",
+                    "zip" | "tar" | "gz" | "bz2" | "xz" | "7z" | "rar" => "[z]",
+                    "pdf" => "[p]",
+                    "txt" | "md" | "log" => "[t]",
+                    "json" | "yaml" | "yml" | "toml" | "xml" => "[c]",
+                    "exe" | "bin" | "out" | "run" => "[x]",
+                    _ => "[ ]",
+                }
+            }
+        }
+    }
+
     pub fn is_dir(&self) -> bool {
         self.file_type == FileType::Directory
     }