Merge commit from fork

* fix(backend): check target IP before sending HTTP request

* fix(backend): allow accessing private IP when testing

* Apply suggestions from code review

Co-authored-by: anatawa12 <anatawa12@icloud.com>

* fix(backend): lint and typecheck

* fix(backend): add isLocalAddressAllowed option to getAgentByUrl and send (HttpRequestService)

* fix(backend): allow fetchSummaryFromProxy, trueMail to access local addresses

---------

Co-authored-by: anatawa12 <anatawa12@icloud.com>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/backend/src/server/web/UrlPreviewService.ts

@@ -145,6 +145,6 @@ export class UrlPreviewService {
 			contentLengthRequired: meta.urlPreviewRequireContentLength,
 		});
 
-		return this.httpRequestService.getJson<SummalyResult>(`${proxy}?${queryStr}`);
+		return this.httpRequestService.getJson<SummalyResult>(`${proxy}?${queryStr}`, 'application/json, */*', undefined, true);
 	}
 }