fix: animation and nodemodule (#167)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Style**
- Updated the appearance of the text input area to display a white
background in light mode while preserving dark mode styling.

- **Bug Fixes**
- Enhanced file browsing by filtering out unnecessary directories from
view, resulting in a cleaner, more focused listing.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: NarwhalChen

frontend/src/components/root/prompt-form.tsx

@@ -149,7 +149,7 @@ export const PromptForm = forwardRef<PromptFormRef, PromptFormProps>(
               onFocus={() => setIsFocused(true)}
               onBlur={() => setIsFocused(false)}
               placeholder=""
-              className="w-full min-h-[200px] py-6 px-6 pr-12 text-lg border border-transparent rounded-lg focus:outline-none focus:ring-0 dark:bg-gray-700 dark:text-white dark:placeholder-gray-400 resize-none font-normal"
+              className="w-full min-h-[200px] py-6 px-6 pr-12 text-lg border border-transparent rounded-lg focus:outline-none focus:ring-0 bg-white dark:bg-gray-700 dark:text-white dark:placeholder-gray-400 resize-none font-normal"
               disabled={isLoading || isRegenerating}
               rows={4}
               style={{ paddingBottom: '48px' }} // Extra padding at bottom to avoid text touching buttons

frontend/src/utils/file-reader.ts

@@ -45,6 +45,7 @@ export class FileReader {
       const items = await fs.readdir(dir, { withFileTypes: true });
 
       for (const item of items) {
+        if (item.name.includes('node_modules')) continue;
         const fullPath = path.join(dir, item.name);
         const relativePath = path.relative(this.basePath, fullPath);