Release 1.0.7: Linux AppImage (x64/arm64) CI, merge update feed, docs

- electron-builder linux + qemu cross arm64 on ubuntu-22.04 job
- sync-update-feed: merge copy, ARTIFACT_LINUX, .appimage
- GITEA_AUTO_UPDATE + MANUAL_MAC_UPDATE_UPLOAD

Co-authored-by: Cursor <cursoragent@cursor.com>

app/shared/package.build.test.ts

@@ -6,7 +6,7 @@ import { fileURLToPath } from 'node:url';
 
 const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..', '..');
 
-void test('package.json: конфиг electron-builder (mac/win)', () => {
+void test('package.json: конфиг electron-builder (mac/win/linux)', () => {
   const pkg = JSON.parse(fs.readFileSync(path.join(root, 'package.json'), 'utf8')) as {
     build: {
       appId: string;
@@ -14,6 +14,8 @@ void test('package.json: конфиг electron-builder (mac/win)', () => {
       asarUnpack: string[];
       extraResources: { from: string; to: string }[];
       mac: { target: unknown };
+      linux: { target: unknown };
+      appImage?: { artifactName?: string };
       files: string[];
     };
   };
@@ -34,5 +36,10 @@ void test('package.json: конфиг electron-builder (mac/win)', () => {
     ),
   );
   assert.ok(Array.isArray(pkg.build.mac.target));
+  assert.ok(Array.isArray(pkg.build.linux.target));
+  const linuxTargets = pkg.build.linux.target as { target: string; arch: string[] }[];
+  assert.ok(linuxTargets.some((t) => t.target === 'AppImage'));
+  assert.ok(linuxTargets.some((t) => t.arch.includes('x64') && t.arch.includes('arm64')));
+  assert.ok(pkg.build.appImage?.artifactName?.includes('${arch}'));
   assert.ok(pkg.build.files.includes('dist/**/*'));
 });