fix: fix the false positive result of firewall rule checking

Author: Kuingsmile

src-tauri/src/cmd/firewall.rs

@@ -96,7 +96,10 @@ pub async fn check_firewall_rule(state: State<'_, AppState>) -> Result<bool, Str
         .port;
 
     if let Some(out) = rule_stdout()? {
-        Ok(out.contains(&port.to_string()))
+        let rule_exists = out.contains(&format!("LocalPort: {port}"))
+            && out.contains("Action: Allow")
+            && out.contains("Protocol: TCP");
+        Ok(rule_exists)
     } else {
         Ok(false)
     }

src/utils/formatters.ts

@@ -1,5 +1,5 @@
 export const formatBytes = (bytes: number, decimals = 2): string => {
-  if (bytes === 0) return '0 Bytes'
+  if (bytes <= 0) return '0 Bytes'
 
   const k = 1024
   const dm = decimals < 0 ? 0 : decimals