Implement TUI search and mutation workflows

crates/storage/src/read.rs

@@ -294,6 +294,10 @@ impl GrepResults {
         self.entries.is_empty()
     }
 
+    pub fn includes_line_numbers(&self) -> bool {
+        self.line_numbers
+    }
+
     /// Render matched bytes without requiring the CLI to reconstruct entry semantics.
     pub fn render_plain(&self) -> SecretBytes {
         let mut rendered = Vec::new();