feat: add left-side image and improve login page (#1226)

web/src/locales/zh/data.json

@@ -17,6 +17,7 @@
     "Auto signin - Tooltip": "当Casdoor存在已登录会话时，自动采用该会话进行应用端的登录",
     "Background URL": "背景图URL",
     "Background URL - Tooltip": "登录页背景图的链接",
+    "Center": "居中",
     "Copy SAML metadata URL": "复制SAML元数据URL",
     "Copy prompt page URL": "复制提醒页面URL",
     "Copy signin page URL": "复制登录页面URL",
@@ -28,6 +29,7 @@
     "Enable WebAuthn signin - Tooltip": "是否支持用户在登录页面通过WebAuthn方式登录",
     "Enable code signin": "启用验证码登录",
     "Enable code signin - Tooltip": "是否允许用手机或邮箱验证码登录",
+    "Enable side panel": "启用侧面板",
     "Enable signin session - Tooltip": "从应用登录Casdoor后，Casdoor是否保持会话",
     "Enable signup": "启用注册",
     "Enable signup - Tooltip": "是否允许用户注册",
@@ -39,6 +41,7 @@
     "From position - Tooltip": "登录和注册面板的位置",
     "Grant types": "OAuth授权类型",
     "Grant types - Tooltip": "选择允许哪些OAuth协议中的Grant types",
+    "Left": "居左",
     "New Application": "添加应用",
     "Password ON": "开启密码",
     "Password ON - Tooltip": "是否允许密码登录",
@@ -49,9 +52,13 @@
     "Redirect URLs - Tooltip": "登录成功后重定向地址列表",
     "Refresh token expire": "Refresh Token过期",
     "Refresh token expire - Tooltip": "Refresh Token过期时间",
+    "Right": "居右",
     "SAML metadata": "SAML元数据",
     "SAML metadata - Tooltip": "SAML协议的元数据（Metadata）信息",
     "SAML metadata URL copied to clipboard successfully": "SAML元数据URL已成功复制到剪贴板",
+    "Side panel HTML": "侧面板 HTML",
+    "Side panel HTML - Edit": "侧面板 HTML - 编辑",
+    "Side panel HTML - Tooltip": "侧面板 HTML - Tooltip",
     "Signin page URL copied to clipboard successfully, please paste it into the incognito window or another browser": "登录页面URL已成功复制到剪贴板，请粘贴到当前浏览器的隐身模式窗口或另一个浏览器访问",
     "Signin session": "保持登录会话",
     "Signup items": "注册项",