fix(updater): tighten manual release fallback

apps/electron-backend/src/app/services/app-update.service.spec.ts

@@ -176,6 +176,37 @@ describe('AppUpdateService', () => {
         });
     });
 
+    it('loads additional GitHub release pages when the first page has no stable releases', async () => {
+        const prereleasePage = Array.from({ length: 10 }, (_, index) => ({
+            ...githubReleases[2],
+            name: `v0.25.${index}-beta`,
+            tag_name: `v0.25.${index}-beta`,
+        }));
+        const fetcher = createReleaseFetcher([
+            prereleasePage,
+            [githubReleases[0]],
+        ]);
+        const { service } = createService({
+            env: {},
+            fetcher,
+            platform: 'linux',
+        });
+
+        await service.checkForUpdates();
+
+        expect(fetcher).toHaveBeenCalledTimes(2);
+        expect(
+            fetcher.mock.calls.map(([url]) =>
+                new URL(url).searchParams.get('page')
+            )
+        ).toEqual(['1', '2']);
+        expect(service.getStatus()).toMatchObject({
+            latestVersion: '0.24.0',
+            status: ELECTRON_BRIDGE_APP_UPDATE_STATUSES.Available,
+            supportedSelfUpdate: false,
+        });
+    });
+
     it('starts a packaged startup check without downloading automatically', async () => {
         const { service, updater } = createService();
 

apps/electron-backend/src/app/services/app-update.service.ts

@@ -439,7 +439,7 @@ export class AppUpdateService {
     }
 
     private async checkGitHubReleaseForManualUpdate(): Promise<void> {
-        await this.ensureReleasePageLoaded(1);
+        await this.ensureFirstStableReleaseLoaded();
         const latestRelease = this.releases[0];
 
         if (!latestRelease) {
@@ -467,6 +467,12 @@ export class AppUpdateService {
         });
     }
 
+    private async ensureFirstStableReleaseLoaded(): Promise<void> {
+        while (!this.loadedAllReleases && this.releases.length === 0) {
+            await this.ensureReleasePageLoaded(this.loadedReleasePages + 1);
+        }
+    }
+
     private async findReleaseIndex(
         version: string | undefined
     ): Promise<number> {

apps/web/src/app/app-update-notification-panel.component.spec.ts

@@ -65,7 +65,9 @@ describe('AppUpdateNotificationPanelComponent', () => {
         fixture.detectChanges();
 
         expect(
-            fixture.nativeElement.querySelector('[data-test-id="app-update-notification"]')
+            fixture.nativeElement.querySelector(
+                '[data-test-id="app-update-notification"]'
+            )
         ).not.toBeNull();
     });
 
@@ -86,7 +88,9 @@ describe('AppUpdateNotificationPanelComponent', () => {
             })
         );
         expect(
-            fixture.nativeElement.querySelector('[data-test-id="app-update-notification"]')
+            fixture.nativeElement.querySelector(
+                '[data-test-id="app-update-notification"]'
+            )
         ).not.toBeNull();
     });
 
@@ -103,4 +107,34 @@ describe('AppUpdateNotificationPanelComponent', () => {
 
         expect(window.electron.downloadAppUpdate).toHaveBeenCalledTimes(1);
     });
+
+    it('labels unsupported platform action as a GitHub release link', () => {
+        const open = jest.spyOn(window, 'open').mockImplementation(() => null);
+        statusHandler?.({
+            ...availableStatus,
+            supportedSelfUpdate: false,
+        });
+        fixture.detectChanges();
+
+        const button = fixture.nativeElement.querySelector(
+            '[data-test-id="app-update-notification-download"]'
+        ) as HTMLButtonElement;
+
+        expect(button.textContent).toContain(
+            'SETTINGS.APP_UPDATE_OPEN_RELEASE'
+        );
+        expect(button.querySelector('mat-icon')?.textContent?.trim()).toBe(
+            'open_in_new'
+        );
+
+        button.click();
+
+        expect(window.electron.downloadAppUpdate).not.toHaveBeenCalled();
+        expect(open).toHaveBeenCalledWith(
+            availableStatus.manualDownloadUrl,
+            '_blank',
+            'noreferrer'
+        );
+        open.mockRestore();
+    });
 });

apps/web/src/app/app-update-notification-panel.component.ts

@@ -1,4 +1,11 @@
-import { Component, computed, OnDestroy, OnInit, signal, inject } from '@angular/core';
+import {
+    Component,
+    computed,
+    OnDestroy,
+    OnInit,
+    signal,
+    inject,
+} from '@angular/core';
 import { MatButtonModule } from '@angular/material/button';
 import { MatDialog } from '@angular/material/dialog';
 import { MatIconModule } from '@angular/material/icon';
@@ -46,7 +53,10 @@ import { AppUpdateReleaseNotesDialogComponent } from './settings/app-update-rele
                         }}
                     </strong>
                     @if (status()?.progress; as progress) {
-                        <progress [value]="progress.percent" max="100"></progress>
+                        <progress
+                            [value]="progress.percent"
+                            max="100"
+                        ></progress>
                     }
                 </div>
 
@@ -76,13 +86,14 @@ import { AppUpdateReleaseNotesDialogComponent } from './settings/app-update-rele
                             mat-flat-button
                             type="button"
                             [disabled]="
-                                status()?.status === appUpdateStatuses.Downloading
+                                status()?.status ===
+                                appUpdateStatuses.Downloading
                             "
                             (click)="downloadUpdate()"
                             data-test-id="app-update-notification-download"
                         >
-                            <mat-icon>download</mat-icon>
-                            {{ 'SETTINGS.APP_UPDATE_DOWNLOAD' | translate }}
+                            <mat-icon>{{ primaryActionIcon() }}</mat-icon>
+                            {{ primaryActionLabelKey() | translate }}
                         </button>
                     }
                 </div>
@@ -175,6 +186,16 @@ export class AppUpdateNotificationPanelComponent implements OnInit, OnDestroy {
             ? 'SETTINGS.APP_UPDATE_DOWNLOADED'
             : 'SETTINGS.APP_UPDATE_AVAILABLE'
     );
+    readonly primaryActionLabelKey = computed(() =>
+        this.status()?.supportedSelfUpdate === false
+            ? 'SETTINGS.APP_UPDATE_OPEN_RELEASE'
+            : 'SETTINGS.APP_UPDATE_DOWNLOAD'
+    );
+    readonly primaryActionIcon = computed(() =>
+        this.status()?.supportedSelfUpdate === false
+            ? 'open_in_new'
+            : 'download'
+    );
     readonly isVisible = computed(() => {
         const status = this.status();