Fix Shopify video previews and various improvements

- Ensure Shopify video sync updates Media Manager with active video previews
- Fix "Image load failed" error for video icons by using Base64 SVG
- Resolve Drive picker origin error by using google.script.host.origin
- Fix Drive video playback issues by using Drive iframe player
- Add `test:log` script to package.json for full output logging in Windows
- Update .gitignore to exclude coverage, test_output.txt, and .agent/
- Remove test_output.txt from git tracking

.gitignore

@@ -4,3 +4,5 @@ desktop.ini
 .continue/**
 .clasp.json
 coverage/
+test_output.txt
+.agent/

MEMORY.md

@@ -46,3 +46,6 @@ This project (`product_inventory`) integrates Google Sheets with Shopify. It ser
 - **Client-Side Syntax**:
     - **ES5 ONLY**: Do not use `class` in client-side HTML files. The Apps Script sanitizer often fails to parse them. Use `function` constructors.
 
+## Troubleshooting
+- **Test Output**: When running tests, use `npm run test:log` to capture full output to `test_output.txt`. This avoids terminal truncation and allows agents to read the full results without manual redirection.
+

package.json

@@ -9,6 +9,7 @@
     "build": "webpack --mode production",
     "deploy": "clasp push",
     "test": "jest",
+    "test:log": "jest > test_output.txt 2>&1",
     "prepare": "husky"
   },
   "devDependencies": {