Implement support ticket system with role request and bug report functionalities

- Introduced a new support ticket system allowing users to submit bug reports and role requests.
- Implemented endpoints for creating, updating, and managing support tickets, including file attachments.
- Enhanced Telegram bot integration to handle role requests directly within the bot, enabling admins to approve or reject requests without accessing the website.
- Updated database schema to include support ticket entities and their relationships.
- Improved API documentation to reflect new support ticket endpoints and their usage.
- Added necessary localization for support ticket features in both Russian and English.

frontend/src/shared/api/client.ts

@@ -91,3 +91,36 @@ export async function apiRequest<T>(path: string, options: RequestOptions = {}):
   const text = await response.text()
   return (text ? JSON.parse(text) : undefined) as T
 }
+
+type UploadOptions = {
+  method?: 'POST' | 'PUT'
+  skipRefresh?: boolean
+}
+
+/** Как apiRequest, но для multipart/form-data (вложения к тикетам) — без JSON.stringify и
+ * без Content-Type (браузер сам проставляет boundary). */
+export async function apiUpload<T>(path: string, formData: FormData, options: UploadOptions = {}): Promise<T> {
+  const headers: Record<string, string> = {}
+  if (accessToken) headers.Authorization = `Bearer ${accessToken}`
+
+  const response = await fetch(`/api${path}`, {
+    method: options.method ?? 'POST',
+    headers,
+    credentials: 'include',
+    body: formData,
+  })
+
+  if (response.status === 401 && !options.skipRefresh) {
+    const refreshed = await refreshAccessToken()
+    if (refreshed) return apiUpload<T>(path, formData, { ...options, skipRefresh: true })
+    onUnauthorized?.()
+    throw await parseError(response)
+  }
+
+  if (!response.ok) throw await parseError(response)
+
+  if (response.status === 204) return undefined as T
+
+  const text = await response.text()
+  return (text ? JSON.parse(text) : undefined) as T
+}