Fix ThemeSelector imports and revert ModelTypeTextbox type changes

- Updated ThemeSelector.tsx to use storybook/internal/components instead of deprecated @storybook/components
- Reverted ModelTypeTextbox.tsx to use more specific ChangeEvent<HTMLSelectElement> type instead of generic Event type

Addresses review comments from PR #4262

Co-authored-by: d10c <9970661+d10c@users.noreply.github.com>

Author: Copilot

extensions/ql-vscode/.storybook/vscode-theme-addon/ThemeSelector.tsx

@@ -7,7 +7,7 @@ import {
   IconButton,
   TooltipLinkList,
   WithTooltip,
-} from "@storybook/components";
+} from "storybook/internal/components";
 import { DashboardIcon } from "@storybook/icons";
 
 import { themeNames, VSCodeTheme } from "./theme";

extensions/ql-vscode/src/view/model-editor/ModelTypeTextbox.tsx

@@ -32,8 +32,8 @@ export const ModelTypeTextbox = ({
     setValue(modeledMethod[typeInfo]);
   }, [modeledMethod, typeInfo]);
 
-  const handleChange = useCallback((e: Event) => {
-    const target = e.target as HTMLInputElement;
+  const handleChange = useCallback((e: ChangeEvent<HTMLSelectElement>) => {
+    const target = e.target as HTMLSelectElement;
 
     setValue(target.value);
   }, []);