chore: update placeholder of font select input

frontend/src/components/dialogs/ConnectionDialog.vue

@@ -498,6 +498,7 @@ const pasteFromClipboard = async () => {
                     </n-form>
                 </n-tab-pane>
 
+                <!-- Alias pane -->
                 <n-tab-pane :tab="$t('dialogue.connection.alias.title')" display-directive="show:lazy" name="alias">
                     <n-form
                         :model="generalForm.alias"

frontend/src/components/dialogs/PreferencesDialog.vue

@@ -108,6 +108,7 @@ const onClose = () => {
                             <n-select
                                 v-model:value="prefStore.general.fontFamily"
                                 :options="prefStore.fontOption"
+                                :placeholder="$t('preferences.general.font_tip')"
                                 :render-label="({ label, value }) => (value === '' ? $t(label) : label)"
                                 filterable
                                 multiple
@@ -166,6 +167,7 @@ const onClose = () => {
                             <n-select
                                 v-model:value="prefStore.editor.fontFamily"
                                 :options="prefStore.fontOption"
+                                :placeholder="$t('preferences.general.font_tip')"
                                 :render-label="({ label, value }) => value || $t(label)"
                                 filterable
                                 multiple
@@ -206,6 +208,7 @@ const onClose = () => {
                             <n-select
                                 v-model:value="prefStore.cli.fontFamily"
                                 :options="prefStore.fontOption"
+                                :placeholder="$t('preferences.general.font_tip')"
                                 :render-label="({ label, value }) => value || $t(label)"
                                 filterable
                                 multiple

frontend/src/langs/en-us.json

@@ -37,6 +37,7 @@
       "language": "Language",
       "system_lang": "Use System Language",
       "font": "Font",
+      "font_tip": "Please Select or Input Font Name",
       "font_size": "Font Size",
       "scan_size": "Default Size for SCAN Command",
       "key_icon_style": "Key Icon Style",

frontend/src/langs/zh-cn.json

@@ -37,6 +37,7 @@
       "language": "语言",
       "system_lang": "使用系统语言",
       "font": "字体",
+      "font_tip": "请选择或手动输入字体名",
       "font_size": "字体尺寸",
       "scan_size": "SCAN命令默认数量",
       "key_icon_style": "键图标样式",