Revert to v1.5.49 base + fix "Ausgewählte Downloads starten"

- Restore all source files from v1.5.49 (proven stable on both servers)
- Add startPackages() IPC method that starts only specified packages
- Fix context menu "Ausgewählte Downloads starten" to use startPackages()
  instead of start() which was starting ALL enabled packages

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/mega-web-fallback.ts

@@ -1,4 +1,3 @@
-import { ProviderAccountInfo } from "../shared/types";
 import { UnrestrictedLink } from "./realdebrid";
 import { compactErrorText, filenameFromUrl, sleep } from "./utils";
 
@@ -16,7 +15,6 @@ const LOGIN_URL = "https://www.mega-debrid.eu/index.php?form=login";
 const DEBRID_URL = "https://www.mega-debrid.eu/index.php?form=debrid";
 const DEBRID_AJAX_URL = "https://www.mega-debrid.eu/index.php?ajax=debrid&json";
 const DEBRID_REFERER = "https://www.mega-debrid.eu/index.php?page=debrideur&lang=de";
-const PROFILE_URL = "https://www.mega-debrid.eu/index.php?page=profil";
 
 function normalizeLink(link: string): string {
   return link.trim().toLowerCase();
@@ -266,51 +264,6 @@ export class MegaWebFallback {
     }, signal);
   }
 
-  public async getAccountInfo(): Promise<ProviderAccountInfo> {
-    return this.runExclusive(async () => {
-      const creds = this.getCredentials();
-      if (!creds.login.trim() || !creds.password.trim()) {
-        return { provider: "megadebrid", username: "", accountType: "", daysRemaining: null, loyaltyPoints: null, error: "Login/Passwort nicht konfiguriert" };
-      }
-
-      try {
-        if (!this.cookie || Date.now() - this.cookieSetAt > 20 * 60 * 1000) {
-          await this.login(creds.login, creds.password);
-        }
-
-        const res = await fetch(PROFILE_URL, {
-          method: "GET",
-          headers: {
-            "User-Agent": "Mozilla/5.0",
-            Cookie: this.cookie,
-            Referer: DEBRID_REFERER
-          },
-          signal: AbortSignal.timeout(30000)
-        });
-        const html = await res.text();
-
-        const usernameMatch = html.match(/<a[^>]*id=["']user_link["'][^>]*><span>([^<]+)<\/span>/i);
-        const username = usernameMatch?.[1]?.trim() || "";
-
-        const typeMatch = html.match(/(Premiumuser|Freeuser)\s*-\s*(\d+)\s*Tag/i);
-        const accountType = typeMatch?.[1] || "Unbekannt";
-        const daysRemaining = typeMatch?.[2] ? parseInt(typeMatch[2], 10) : null;
-
-        const pointsMatch = html.match(/(\d+)\s*Treuepunkte/i);
-        const loyaltyPoints = pointsMatch?.[1] ? parseInt(pointsMatch[1], 10) : null;
-
-        if (!username && !typeMatch) {
-          this.cookie = "";
-          return { provider: "megadebrid", username: "", accountType: "", daysRemaining: null, loyaltyPoints: null, error: "Profil konnte nicht gelesen werden (Session ungültig?)" };
-        }
-
-        return { provider: "megadebrid", username, accountType, daysRemaining, loyaltyPoints };
-      } catch (err) {
-        return { provider: "megadebrid", username: "", accountType: "", daysRemaining: null, loyaltyPoints: null, error: compactErrorText(err) };
-      }
-    });
-  }
-
   public invalidateSession(): void {
     this.cookie = "";
     this.cookieSetAt = 0;