v0.6.23: Fix Linkkf download - CDP Headers wrapper, yt-dlp --add-header support

- Fix zendriver_daemon CDP Headers bug (wrap dict with zd.cdp.network.Headers())
- Fix HTML entity decoding in iframe URLs (use html.unescape())
- Simplify GDM source_type to always use 'linkkf'

inspect_zendriver_test.py

@@ -0,0 +1,31 @@
+import asyncio
+import zendriver as zd
+import json
+import os
+
+async def test():
+    try:
+        browser = await zd.start(headless=True)
+        page = await browser.get("about:blank")
+        
+        # Test header setting
+        headers = {"Referer": "https://v2.linkkf.app/"}
+        try:
+            await page.send(zd.cdp.network.enable())
+            headers_obj = zd.cdp.network.Headers(headers)
+            await page.send(zd.cdp.network.set_extra_http_headers(headers_obj))
+            print("Successfully set headers")
+        except Exception as e:
+            print(f"Failed to set headers: {e}")
+            import traceback
+            traceback.print_exc()
+
+        methods = [m for m in dir(page) if not m.startswith("_")]
+        print(json.dumps({"methods": methods}))
+        await browser.stop()
+    except Exception as e:
+        import traceback
+        print(json.dumps({"error": str(e), "traceback": traceback.format_exc()}))
+
+if __name__ == "__main__":
+    asyncio.run(test())