feat:更新主题色兼容

lib/widgets/calendar_form.dart

@@ -80,7 +80,11 @@ class _CalendarFormState extends State<CalendarForm> {
         label: RichText(
           text: TextSpan(
             text: '内容',
-            style: TextStyle(color: Colors.grey.shade700, fontSize: 16),
+            style: TextStyle(
+              color: Colors.grey,
+              fontSize: 16,
+              fontFamily: 'CustomFont',
+            ),
             children: const [
               TextSpan(
                 text: '*',
@@ -146,9 +150,7 @@ class _CalendarFormState extends State<CalendarForm> {
       decoration: InputDecoration(
         labelText:
             startTime == null ? '选择开始时间' : '开始时间: ${formatTime(startTime)}',
-        labelStyle: TextStyle(
-          color: startTime == null ? Colors.grey : Colors.black87,
-        ),
+        labelStyle: TextStyle(color: Colors.grey),
         prefixIcon: Icon(Icons.calendar_month, color: Colors.purple),
         border: buildFormBoard(),
         enabledBorder: buildFormEnabledBoard(),
@@ -196,9 +198,7 @@ class _CalendarFormState extends State<CalendarForm> {
       },
       decoration: InputDecoration(
         labelText: endTime == null ? '选择结束时间' : '结束时间: ${formatTime(endTime)}',
-        labelStyle: TextStyle(
-          color: endTime == null ? Colors.grey : Colors.black87,
-        ),
+        labelStyle: TextStyle(color: Colors.grey),
         prefixIcon: Icon(Icons.calendar_month, color: Colors.purple),
         border: buildFormBoard(),
         enabledBorder: buildFormEnabledBoard(),
@@ -247,11 +247,9 @@ class _CalendarFormState extends State<CalendarForm> {
       decoration: InputDecoration(
         labelText:
             scheduledTime == null
-                ? '选择提醒日期'
-                : '提醒: ${formatTime(scheduledTime)}',
-        labelStyle: TextStyle(
-          color: scheduledTime == null ? Colors.grey : Colors.black87,
-        ),
+                ? '选择提醒时间'
+                : '提醒时间: ${formatTime(scheduledTime)}',
+        labelStyle: TextStyle(color: Colors.grey),
         prefixIcon: Icon(Icons.calendar_month, color: Colors.purple),
         border: buildFormBoard(),
         enabledBorder: buildFormEnabledBoard(),