feat: add LinkSnappy provider, account deactivation, UI polish

- Add LinkSnappy provider with cookie-based session auth and /api/linkgen
- Upgrade LinkSnappy download URLs from http to https (fix 425 errors)
- Add account deactivation toggle (disabledProviders in settings)
- Show account type (API/Web/Login) in provider dropdowns
- Show API key count for Debrid-Link in status label
- Fix all missing German umlauts throughout the UI
- Wider modal for textarea, compact action buttons in one row
- Debrid-Link: log which API key (#1/#2) is used for unrestrict

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

src/shared/types.ts

@@ -14,7 +14,7 @@ export type CleanupMode = "none" | "trash" | "delete";
 export type ConflictMode = "overwrite" | "skip" | "rename" | "ask";
 export type SpeedMode = "global" | "per_download";
 export type FinishedCleanupPolicy = "never" | "immediate" | "on_start" | "package_done";
-export type DebridProvider = "realdebrid" | "megadebrid" | "bestdebrid" | "alldebrid" | "ddownload" | "onefichier" | "debridlink";
+export type DebridProvider = "realdebrid" | "megadebrid" | "bestdebrid" | "alldebrid" | "ddownload" | "onefichier" | "debridlink" | "linksnappy";
 export type DebridFallbackProvider = DebridProvider | "none";
 export type AppTheme = "dark" | "light";
 export type PackagePriority = "high" | "normal" | "low";
@@ -50,6 +50,8 @@ export interface AppSettings {
   ddownloadPassword: string;
   oneFichierApiKey: string;
   debridLinkApiKeys: string;
+  linkSnappyLogin: string;
+  linkSnappyPassword: string;
   archivePasswordList: string;
   rememberToken: boolean;
   providerPrimary: DebridProvider;
@@ -93,6 +95,7 @@ export interface AppSettings {
   columnOrder: string[];
   extractCpuPriority: ExtractCpuPriority;
   autoExtractWhenStopped: boolean;
+  disabledProviders: DebridProvider[];
 }
 
 export interface DownloadItem {