修复主机密码编辑问题，修复Web终端双重发送

database.py

@@ -160,10 +160,18 @@ class Database:
         """更新主机信息"""
         with self.get_connection() as conn:
             auth_method = host_data.get('auth_method', 'password')
-            encrypted_password = None
+            current_host = conn.execute(
+                "SELECT password FROM hosts WHERE id = ?",
+                (host_id,)
+            ).fetchone()
+            current_password = current_host["password"] if current_host else None
 
-            if auth_method == 'password' and host_data.get('password'):
+            if auth_method == 'key':
+                encrypted_password = None
+            elif host_data.get('password'):
                 encrypted_password = self.crypto.encrypt(host_data['password'])
+            else:
+                encrypted_password = current_password
             
             conn.execute("""
                 UPDATE hosts 

web/src/pages/TerminalPage.tsx

@@ -190,23 +190,9 @@ function TerminalPage() {
     term.current = terminal;
     terminal.open(terminalRef.current);
 
-    terminal.onKey(({ key, domEvent }) => {
-      if (domEvent.ctrlKey && domEvent.key === 'c') {
-        if (socket.current?.readyState === WebSocket.OPEN) {
-          socket.current.send(JSON.stringify({ type: 'input', data: '\x03' }));
-        }
-      } else {
-        if (socket.current?.readyState === WebSocket.OPEN) {
-          socket.current.send(JSON.stringify({ type: 'input', data: key }));
-        }
-      }
-    });
-
     terminal.onData((data) => {
       if (socket.current?.readyState === WebSocket.OPEN) {
-        if (data.length > 1) {
-          socket.current.send(JSON.stringify({ type: 'input', data }));
-        }
+        socket.current.send(JSON.stringify({ type: 'input', data }));
       }
     });