feat:更新主题色兼容

lib/widgets/flisp_form.dart

@@ -77,8 +77,6 @@ class _FlispFormState extends State<FlispForm> {
       decoration: InputDecoration(
         hintText: '记录你的灵感瞬间...',
         hintStyle: TextStyle(color: Colors.grey),
-        counterText: '',
-        suffixText: '${provider.formItem.content.length}/$maxContentCount',
         border: OutlineInputBorder(
           borderRadius: BorderRadius.circular(12),
           borderSide: BorderSide(color: Colors.grey.shade200),
@@ -98,6 +96,22 @@ class _FlispFormState extends State<FlispForm> {
       minLines: 4,
       maxLines: 8,
       maxLength: maxContentCount,
+      buildCounter: (
+          context, {
+            required currentLength,
+            required isFocused,
+            maxLength,
+          }) {
+        return Text(
+          '$currentLength/$maxContentCount',
+          style: TextStyle(
+            color:
+            currentLength > maxLength!
+                ? Colors.red
+                : Theme.of(context).colorScheme.primary,
+          ),
+        );
+      },
       validator: (value) {
         if (value != null && value.isEmpty) {
           return '请输入内容';
@@ -204,7 +218,7 @@ class _FlispFormState extends State<FlispForm> {
         width: 90,
         padding: EdgeInsets.all(8),
         decoration: BoxDecoration(
-          color: Colors.white,
+          color: Theme.of(context).colorScheme.surface,
           borderRadius: BorderRadius.circular(8),
           boxShadow: [
             BoxShadow(