diff --git a/app/lib/features/editor/widgets/text_input_overlay.dart b/app/lib/features/editor/widgets/text_input_overlay.dart
new file mode 100644
index 0000000..cef7b0c
--- /dev/null
+++ b/app/lib/features/editor/widgets/text_input_overlay.dart
@@ -0,0 +1,205 @@
+import 'package:flutter/material.dart';
+
+/// 编辑器文字输入覆盖层
+/// 当用户选择文字工具时，在画布上叠加一个 TextField
+class TextInputOverlay extends StatefulWidget {
+  final void Function(String text, double fontSize, String fontColor)
+      onConfirmed;
+  final VoidCallback onCancelled;
+
+  const TextInputOverlay({
+    super.key,
+    required this.onConfirmed,
+    required this.onCancelled,
+  });
+
+  @override
+  State<TextInputOverlay> createState() => _TextInputOverlayState();
+}
+
+class _TextInputOverlayState extends State<TextInputOverlay> {
+  final _controller = TextEditingController();
+  final _focusNode = FocusNode();
+
+  double _fontSize = 18.0;
+  String _fontColor = '#2D2420';
+
+  // 字号选项：小(14)/中(18)/大(24)
+  static const _fontSizes = [14.0, 18.0, 24.0];
+  static const _fontSizeLabels = ['小', '中', '大'];
+
+  // 颜色选项
+  static const _colors = [
+    '#2D2420', // 主文字色
+    '#E07A5F', // 珊瑚色
+    '#81B29A', // 鼠尾草绿
+    '#2C7DA0', // 蓝色
+    '#D4A5A5', // 玫瑰粉
+    '#F2CC8F', // 暖金
+    '#9B5DE5', // 紫色
+    '#F15BB5', // 粉色
+  ];
+
+  @override
+  void initState() {
+    super.initState();
+    // 自动弹出键盘
+    Future.microtask(() => _focusNode.requestFocus());
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
+  void _confirm() {
+    final text = _controller.text.trim();
+    if (text.isEmpty) {
+      widget.onCancelled();
+      return;
+    }
+    widget.onConfirmed(text, _fontSize, _fontColor);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      color: Colors.black26,
+      child: Center(
+        child: Container(
+          width: MediaQuery.of(context).size.width * 0.85,
+          constraints: const BoxConstraints(maxHeight: 280),
+          padding: const EdgeInsets.all(16),
+          decoration: BoxDecoration(
+            color: Theme.of(context).colorScheme.surface,
+            borderRadius: BorderRadius.circular(16),
+            boxShadow: [
+              BoxShadow(
+                color: Colors.black.withValues(alpha: 0.15),
+                blurRadius: 20,
+                offset: const Offset(0, 4),
+              ),
+            ],
+          ),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              // 标题行
+              Row(
+                mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                children: [
+                  Text(
+                    '添加文字',
+                    style: Theme.of(context).textTheme.titleSmall,
+                  ),
+                  IconButton(
+                    icon: const Icon(Icons.close, size: 20),
+                    onPressed: widget.onCancelled,
+                    padding: EdgeInsets.zero,
+                    constraints: const BoxConstraints(),
+                  ),
+                ],
+              ),
+              const SizedBox(height: 12),
+              // 文字输入框
+              TextField(
+                controller: _controller,
+                focusNode: _focusNode,
+                maxLines: 4,
+                minLines: 1,
+                textInputAction: TextInputAction.done,
+                onSubmitted: (_) => _confirm(),
+                style: TextStyle(fontSize: _fontSize),
+                decoration: InputDecoration(
+                  hintText: '在这里输入文字...',
+                  border: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(10),
+                    borderSide: BorderSide(color: Colors.grey.shade300),
+                  ),
+                  enabledBorder: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(10),
+                    borderSide: BorderSide(color: Colors.grey.shade300),
+                  ),
+                  focusedBorder: OutlineInputBorder(
+                    borderRadius: BorderRadius.circular(10),
+                    borderSide: BorderSide(
+                      color: Theme.of(context).colorScheme.primary,
+                      width: 2,
+                    ),
+                  ),
+                ),
+              ),
+              const SizedBox(height: 12),
+              // 字号选择
+              Row(
+                children: [
+                  Text('字号', style: Theme.of(context).textTheme.bodySmall),
+                  const SizedBox(width: 8),
+                  ...List.generate(_fontSizes.length, (i) {
+                    final selected = _fontSize == _fontSizes[i];
+                    return Padding(
+                      padding: const EdgeInsets.only(right: 8),
+                      child: ChoiceChip(
+                        label: Text(_fontSizeLabels[i]),
+                        selected: selected,
+                        onSelected: (_) {
+                          setState(() => _fontSize = _fontSizes[i]);
+                        },
+                        visualDensity: VisualDensity.compact,
+                      ),
+                    );
+                  }),
+                ],
+              ),
+              const SizedBox(height: 8),
+              // 颜色选择
+              Row(
+                children: [
+                  Text('颜色', style: Theme.of(context).textTheme.bodySmall),
+                  const SizedBox(width: 8),
+                  ..._colors.map((hex) {
+                    final selected = _fontColor == hex;
+                    final color = _parseHexColor(hex);
+                    return GestureDetector(
+                      onTap: () => setState(() => _fontColor = hex),
+                      child: Container(
+                        width: 28,
+                        height: 28,
+                        margin: const EdgeInsets.only(right: 6),
+                        decoration: BoxDecoration(
+                          color: color,
+                          shape: BoxShape.circle,
+                          border: selected
+                              ? Border.all(color: Colors.black87, width: 2.5)
+                              : Border.all(
+                                  color: Colors.grey.shade300, width: 1),
+                        ),
+                      ),
+                    );
+                  }),
+                ],
+              ),
+              const SizedBox(height: 12),
+              // 确认按钮
+              SizedBox(
+                width: double.infinity,
+                height: 44,
+                child: FilledButton(
+                  onPressed: _confirm,
+                  child: const Text('添加到日记'),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  Color _parseHexColor(String hex) {
+    final code = hex.replaceAll('#', '');
+    return Color(int.parse('FF$code', radix: 16));
+  }
+}