feat(canvas): 优化模型选择器和画布助手设置面板

- 模型选择器添加模糊匹配和图标显示支持OpenAI、Claude、Gemini
- 模型选择器下拉滚动条改为更窄的轻量样式
- 画布助手生图设置弹层调整为紧凑图像设置面板避免裁切问题
- 画布节点设置面板打开时隐藏悬浮工具条避免遮挡

web/src/components/model-picker.tsx

@@ -2,6 +2,7 @@
 
 import { Select } from "antd";
 
+import styles from "./model-picker.module.css";
 import type { AiConfig } from "@/stores/use-config-store";
 
 type ModelPickerProps = {
@@ -15,14 +16,15 @@ type ModelPickerProps = {
 };
 
 export function ModelPicker({ config, value, onChange, className, fullWidth = false, placeholder = "选择模型", onMissingConfig }: ModelPickerProps) {
-  const options = Array.from(new Set([value, ...config.models].filter(Boolean))).map((model) => ({ value: model, label: model }));
+  const options = Array.from(new Set([value, ...config.models].filter(Boolean))).map((model) => ({ value: model, label: <ModelLabel model={model} /> }));
   const width = fullWidth ? "100%" : `min(${Math.max(156, (value || placeholder).length * 8 + 64)}px, 100%)`;
 
   return (
     <Select
       showSearch
       className={`canvas-control-select ${className || ""}`}
-      popupMatchSelectWidth={false}
+      classNames={{ popup: { root: styles.dropdown } }}
+      popupMatchSelectWidth
       popupRender={(menu) => <div onMouseDown={(event) => event.stopPropagation()} onPointerDown={(event) => event.stopPropagation()}>{menu}</div>}
       style={{ width, maxWidth: "100%", minWidth: 0, flexShrink: 1 }}
       value={value || undefined}
@@ -35,7 +37,20 @@ export function ModelPicker({ config, value, onChange, className, fullWidth = fa
       onClick={() => {
         if (!options.length) onMissingConfig?.();
       }}
-      filterOption={(input, option) => String(option?.label || "").toLowerCase().includes(input.toLowerCase())}
+      filterOption={(input, option) => String(option?.value || "").toLowerCase().includes(input.toLowerCase())}
     />
   );
 }
+
+function ModelLabel({ model }: { model: string }) {
+  const icon = resolveModelIcon(model);
+  return <span className="flex min-w-0 items-center gap-2">{icon && <img src={icon} alt="" className="size-4 shrink-0" />}<span className="truncate">{model}</span></span>;
+}
+
+function resolveModelIcon(model: string) {
+  const name = model.toLowerCase();
+  if (name.includes("claude") || name.includes("anthropic")) return "/icons/claude.svg";
+  if (name.includes("gemini") || name.includes("google")) return "/icons/gemini.svg";
+  if (name.includes("gpt") || name.includes("openai")) return "/icons/openai.svg";
+  return "";
+}