feat(webui): enhance ConfigSchemaGenerator with field_docs and UI metadata

- Add AttrDocBase.get_class_field_docs() classmethod for class-level field docs extraction
- Merge json_schema_extra (x-widget, x-icon, step) into schema output
- Map Pydantic constraints (ge/le) to minValue/maxValue for frontend compatibility
- Add ge=0, le=1 constraints to ChatConfig.talk_value for validation

Completes Task 1 (including subtasks 1a, 1b, 1c, 1d) of webui-config-visualization-refactor plan.

src/config/config_base.py

@@ -5,7 +5,7 @@ import types
 from dataclasses import dataclass, field
 from pathlib import Path
 from pydantic import BaseModel, ConfigDict, Field
-from typing import Union, get_args, get_origin, Tuple, Any, List, Dict, Set, Literal
+from typing import Any, Dict, List, Literal, Set, Tuple, Union, cast, get_args, get_origin
 
 __all__ = ["ConfigBase", "Field", "AttributeData"]
 
@@ -44,6 +44,16 @@ class AttrDocBase:
         # 从类定义节点中提取字段文档
         return self._extract_field_docs(class_node, allow_extra_methods)
 
+    @classmethod
+    def get_class_field_docs(cls) -> dict[str, str]:
+        class_source = cls._get_class_source()
+        class_node = cls._find_class_node(class_source)
+        return AttrDocBase._extract_field_docs(
+            cast(AttrDocBase, cast(Any, cls)),
+            class_node,
+            allow_extra_methods=False,
+        )
+
     @classmethod
     def _get_class_source(cls) -> str:
         """获取类定义所在文件的完整源代码"""
@@ -265,7 +275,7 @@ class ConfigBase(BaseModel, AttrDocBase):
             if origin_type in (int, float, str, bool, complex, bytes, Any):
                 continue
             # 允许嵌套的ConfigBase自定义类
-            if inspect.isclass(origin_type) and issubclass(origin_type, ConfigBase):  # type: ignore
+            if isinstance(origin_type, type) and issubclass(cast(type, origin_type), ConfigBase):
                 continue
             # 只允许 list, set, dict 三类泛型
             if origin_type not in (list, set, dict, List, Set, Dict, Literal):

src/config/official_configs.py

@@ -104,6 +104,8 @@ class ChatConfig(ConfigBase):
 
     talk_value: float = Field(
         default=1,
+        ge=0,
+        le=1,
         json_schema_extra={
             "x-widget": "slider",
             "x-icon": "message-circle",

src/webui/config_schema.py

@@ -77,6 +77,18 @@ class ConfigSchemaGenerator:
         if options:
             schema["options"] = options
 
+        # Task 1c: Merge json_schema_extra (x-widget, x-icon, step, etc.)
+        if hasattr(field_info, "json_schema_extra") and field_info.json_schema_extra:
+            schema.update(field_info.json_schema_extra)
+
+        # Task 1d: Map Pydantic constraints to minValue/maxValue (frontend naming convention)
+        if hasattr(field_info, "metadata") and field_info.metadata:
+            for constraint in field_info.metadata:
+                if hasattr(constraint, "ge"):
+                    schema["minValue"] = constraint.ge
+                if hasattr(constraint, "le"):
+                    schema["maxValue"] = constraint.le
+
         return schema
 
     @staticmethod