Fix YARA engine: remove unused Scanner import, fix compiler move issue, remove non-existent description field

ghost-core/src/detection.rs

@@ -263,12 +263,11 @@ impl DetectionEngine {
         // YARA rule scanning
         if let Some(yara_engine) = &self.yara_engine {
             let yara_result = match tokio::runtime::Handle::try_current() {
-                Ok(handle) => handle.block_on(async { yara_engine.scan_process(process, memory_regions).await }),
-                Err(_) => {
-                    tokio::runtime::Runtime::new()
+                Ok(handle) => handle
+                    .block_on(async { yara_engine.scan_process(process, memory_regions).await }),
+                Err(_) => tokio::runtime::Runtime::new()
                     .unwrap()
-                        .block_on(async { yara_engine.scan_process(process, memory_regions).await })
-                }
+                    .block_on(async { yara_engine.scan_process(process, memory_regions).await }),
             };
 
             if let Ok(yara_result) = yara_result {

ghost-core/src/yara_engine.rs

@@ -4,7 +4,7 @@ use std::collections::HashMap;
 use std::fs;
 use std::path::{Path, PathBuf};
 use std::time::SystemTime;
-use yara::{Compiler, Rules, Scanner};
+use yara::{Compiler, Rules};
 
 #[derive(Serialize, Deserialize)]
 pub struct DynamicYaraEngine {
@@ -127,10 +127,7 @@ impl DynamicYaraEngine {
 
         if !rules_dir.exists() {
             return Err(GhostError::Configuration {
-                message: format!(
-                    "Rules directory does not exist: {}",
-                    rules_dir.display()
-                ),
+                message: format!("Rules directory does not exist: {}", rules_dir.display()),
             });
         }
 
@@ -300,7 +297,9 @@ impl DynamicYaraEngine {
         data: &[u8],
         base_address: usize,
     ) -> Result<Vec<RuleMatch>, GhostError> {
-        let scan_results = rules.scan_mem(data, 300).map_err(|e| GhostError::Detection {
+        let scan_results = rules
+            .scan_mem(data, 300)
+            .map_err(|e| GhostError::Detection {
                 message: format!("Scan failed: {}", e),
             })?;