Release Twitch VOD Manager 1.0.18

Harden update, system-check, queue, cutter, streamer and shutdown state transitions.

Add multi-user installer recovery, secret-safe config migration, provider fallback handling, managed-tool validation and real media export coverage.

Refresh the English public documentation, release notes and 1.0.18 product screenshot.

src/german-source-text.production-path.test.ts

@@ -0,0 +1,15 @@
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { describe, expect, it } from 'vitest';
+
+function source(fileName: string): string {
+    return readFileSync(join(__dirname, fileName), 'utf8');
+}
+
+describe('German production text', () => {
+    it('keeps visible HTML and archive fallbacks free of replacement spellings', () => {
+        expect(source('index.html')).not.toMatch(/>Offnen</);
+        expect(source('index.html')).not.toMatch(/>Spater</);
+        expect(source('renderer-archive.ts')).not.toContain("'Oeffnen'");
+    });
+});