fix: Fix svg upload (#5545)

## Description

1. What is this PR about (link the issue and add a short description)

## Steps for reproduction

1. click button
2. expect xyz

## Code Review

- [ ] hi @kof, I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")

## Before merging

- [ ] tested locally and on preview environment (preview dev login:
0000)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env` file

Author: kof

packages/asset-uploader/src/clients/s3/upload.ts

@@ -3,6 +3,7 @@ import type { SignatureV4 } from "@smithy/signature-v4";
 import { type AssetData, getAssetData } from "../../utils/get-asset-data";
 import { createSizeLimiter } from "../../utils/size-limiter";
 import { extendedEncodeURIComponent } from "../../utils/sanitize-s3-key";
+import { getMimeTypeByFilename } from "@webstudio-is/sdk";
 
 export const uploadToS3 = async ({
   signer,
@@ -40,14 +41,17 @@ export const uploadToS3 = async ({
     endpoint
   );
 
+  // Use proper MIME type based on file extension instead of generic type category
+  const contentType = getMimeTypeByFilename(name);
+
   const s3Request = await signer.sign({
     method: "PUT",
     protocol: url.protocol,
     hostname: url.hostname,
     path: url.pathname,
     headers: {
       "x-amz-date": new Date().toISOString(),
-      "Content-Type": type,
+      "Content-Type": contentType,
       "Content-Length": `${data.byteLength}`,
       "Cache-Control": "public, max-age=31536004,immutable",
       "x-amz-content-sha256": "UNSIGNED-PAYLOAD",