fix(dashboard): 修正 OpenCode MCP 配置，移除 enabled 字段、添加 oauth: false

crates/secrets-mcp/templates/dashboard.html

@@ -581,12 +581,12 @@ function buildSecretsConfigText(apiKey, encKey) {
 function buildOpencodeEntry(apiKey, encKey) {
     return {
         type: 'remote',
-        enabled: true,
         url: BASE_URL + '/mcp',
         headers: {
             'Authorization': 'Bearer ' + apiKey,
             'X-Encryption-Key': encKey
-        }
+        },
+        oauth: false
     };
 }