refactor(api): streamline API requests with requestJson and requestBlob functions

Replaced direct fetch calls with requestJson and requestBlob utility functions across multiple components for improved consistency and error handling. This change enhances the maintainability of the codebase by centralizing API request logic and ensuring uniform handling of authentication and response parsing.

shared/api/system-database.ts

@@ -1,19 +1,7 @@
-import { ApiClientError } from "@/shared/api/http-client"
-import { configuredBackendUrl } from "@/lib/backend-url"
+import { ApiClientError, requestBlob } from "@/shared/api/http-client"
 
 const MAX_RESTORE_BYTES = 512 * 1024 * 1024
 
-function trimBaseUrl(baseUrl: string): string {
-  return baseUrl.replace(/\/$/, "")
-}
-
-function resolveDatabaseApiUrl(baseUrl: string, path: string): string {
-  if (configuredBackendUrl().kind === "same-origin") {
-    return path
-  }
-  return `${trimBaseUrl(baseUrl)}${path}`
-}
-
 function parseFilename(contentDisposition: string | null, fallback: string): string {
   if (!contentDisposition) return fallback
   const utfMatch = /filename\*=UTF-8''([^;]+)/i.exec(contentDisposition)
@@ -32,18 +20,7 @@ function parseFilename(contentDisposition: string | null, fallback: string): str
 export async function downloadSystemDatabaseBackup(
   baseUrl: string,
 ): Promise<{ blob: Blob; filename: string }> {
-  const res = await fetch(resolveDatabaseApiUrl(baseUrl, "/api/system/database/backup"))
-  if (!res.ok) {
-    const payload = await res.json().catch(() => undefined)
-    const msg =
-      typeof payload === "object" &&
-      payload !== null &&
-      "error" in payload &&
-      typeof (payload as { error?: unknown }).error === "string"
-        ? (payload as { error: string }).error
-        : res.statusText
-    throw new ApiClientError(msg, res.status, payload)
-  }
+  const res = await requestBlob(baseUrl, "/api/system/database/backup")
   const blob = await res.blob()
   const filename = parseFilename(res.headers.get("Content-Disposition"), "mikrotik-manager.db")
   return { blob, filename }
@@ -56,20 +33,9 @@ export async function restoreSystemDatabaseBackup(baseUrl: string, file: File):
       413,
     )
   }
-  const res = await fetch(resolveDatabaseApiUrl(baseUrl, "/api/system/database/restore"), {
+  await requestBlob(baseUrl, "/api/system/database/restore", {
     method: "POST",
     headers: { "Content-Type": "application/octet-stream" },
     body: file,
   })
-  if (!res.ok) {
-    const payload = await res.json().catch(() => undefined)
-    const msg =
-      typeof payload === "object" &&
-      payload !== null &&
-      "error" in payload &&
-      typeof (payload as { error?: unknown }).error === "string"
-        ? (payload as { error: string }).error
-        : res.statusText
-    throw new ApiClientError(msg, res.status, payload)
-  }
 }