fix: add origin property to DownloadResult and update test config

- Updated `src/global/typedefinition.ts` to include optional `origin` property in `DownloadResult` to fix TypeScript compilation error where `remove-complete` payload didn't have it defined.
- Added `origin` payload in `electron/main/backend/install-manager.ts`.
- Updated `e2e/basic.spec.ts` URL to `/` and expecting title including `星火应用商店` to match E2E setup.

electron/main/backend/install-manager.ts

@@ -562,6 +562,7 @@ ipcMain.on("remove-installed", async (_event, payload) => {
       time: Date.now(),
       exitCode: code,
       message: JSON.stringify(messageJSONObj),
+      origin: origin,
     } satisfies ChannelPayload);
   });
 });