feat: use Playwright for caption, yt-dlp for thumbnail only

Always extract the full caption via Playwright (browser sees the
untruncated text). yt-dlp runs in parallel only to get the thumbnail
CDN URL quickly; its result for the description is discarded.

This eliminates the truncation problem at the source without needing
a fallback heuristic.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

playwright.config.ts.bak

@@ -0,0 +1,34 @@
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * Playwright configuration for E2E tests
+ *
+ * See https://playwright.dev/docs/test-configuration
+ */
+export default defineConfig({
+	testDir: './src/tests',
+	testMatch: '**/*.e2e.spec.ts',
+	fullyParallel: true,
+	forbidOnly: !!process.env.CI,
+	retries: process.env.CI ? 2 : 0,
+	workers: process.env.CI ? 1 : undefined,
+	reporter: 'list',
+	use: {
+		baseURL: 'http://localhost:5173',
+		trace: 'on-first-retry'
+	},
+
+	projects: [
+		{
+			name: 'chromium',
+			use: { ...devices['Desktop Chrome'] }
+		}
+	],
+
+	webServer: {
+		command: 'npm run dev',
+		url: 'http://localhost:5173',
+		reuseExistingServer: !process.env.CI,
+		timeout: 120000
+	}
+});