Restore update checks and startup notifications

src/shared/ipc.ts

@@ -1,6 +1,7 @@
 export const IPC_CHANNELS = {
   GET_SNAPSHOT: "app:get-snapshot",
   GET_VERSION: "app:get-version",
+  CHECK_UPDATES: "app:check-updates",
   UPDATE_SETTINGS: "app:update-settings",
   ADD_LINKS: "queue:add-links",
   ADD_CONTAINERS: "queue:add-containers",

src/shared/preload-api.ts

@@ -1,8 +1,9 @@
-import type { AddLinksPayload, AppSettings, UiSnapshot } from "./types";
+import type { AddLinksPayload, AppSettings, UiSnapshot, UpdateCheckResult } from "./types";
 
 export interface ElectronApi {
   getSnapshot: () => Promise<UiSnapshot>;
   getVersion: () => Promise<string>;
+  checkUpdates: () => Promise<UpdateCheckResult>;
   updateSettings: (settings: Partial<AppSettings>) => Promise<AppSettings>;
   addLinks: (payload: AddLinksPayload) => Promise<{ addedPackages: number; addedLinks: number; invalidCount: number }>;
   addContainers: (filePaths: string[]) => Promise<{ addedPackages: number; addedLinks: number }>;

src/shared/types.ts

@@ -137,6 +137,15 @@ export interface AddContainerPayload {
   filePaths: string[];
 }
 
+export interface UpdateCheckResult {
+  updateAvailable: boolean;
+  currentVersion: string;
+  latestVersion: string;
+  latestTag: string;
+  releaseUrl: string;
+  error?: string;
+}
+
 export interface ParsedHashEntry {
   fileName: string;
   algorithm: "crc32" | "md5" | "sha1";