feat(ui): enhance custom S3 storage configuration with helper text and force path style option

- Add helper text to the S3 storage configuration form to guide users on Endpoint URL format.
- Add 'Force Path Style' checkbox to S3 storage configuration to support MinIO and other S3-compatible providers that require it.
- Update `ProfileModalController` to toggle visibility of these new fields based on the selected provider.
- Update `ProfileModalController` to save and load the `forcePathStyle` setting.
- Update `tests/ui/storageService.test.mjs` to verify persistence of `forcePathStyle`.

tests/ui/storageService.test.mjs

@@ -134,7 +134,8 @@ describe("StorageService", () => {
         region: "us-east-1",
         bucket: "my-bucket",
         accessKeyId: "minio-key",
-        secretAccessKey: "minio-secret"
+        secretAccessKey: "minio-secret",
+        forcePathStyle: true
     };
     const meta = {
         label: "Local Minio",
@@ -151,6 +152,7 @@ describe("StorageService", () => {
     assert.strictEqual(retrieved.region, "us-east-1", "Region should be preserved");
     assert.strictEqual(retrieved.bucket, "my-bucket", "Bucket should be preserved");
     assert.strictEqual(retrieved.accessKeyId, "minio-key");
+    assert.strictEqual(retrieved.forcePathStyle, true, "ForcePathStyle should be preserved");
     assert.strictEqual(retrieved.meta.defaultForUploads, true);
   });