test(e2e): phase-2 add Office and zip smoke automation (#714)

* test(e2e): phase-2 add office and zip smoke coverage

* test(e2e): address copilot review for fixture stability and CI python setup

* test(e2e): fix preflight fixture scope and path handling

* test(e2e): harden fixture preflight and remove duplicate generation

* test(e2e): remove redundant zip install and cleanup temp zip dir

* test(e2e): ensure zip dependency and unify python command in docs

* docs(e2e): align README with npm gen scripts and python3 usage

tests/e2e/README.md

@@ -5,6 +5,8 @@ This folder contains a first MVP of end-to-end automated tests.
 ## What is covered
 
 - Basic preview smoke checks for common file types (txt/md/json/xml/csv/html/png)
+- Office Phase-2 smoke checks (docx/xlsx/pptx)
+- Archive smoke check (zip)
 - Basic endpoint reachability
 - Security regression checks for blocked internal-network hosts (`10.*`) on:
   - `/onlinePreview`
@@ -24,13 +26,16 @@ mvn -q -pl server -DskipTests package
 cd tests/e2e
 npm install
 npx playwright install --with-deps chromium
+pip3 install -r requirements.txt
 ```
 
+> Prerequisite: ensure `zip` command is available in PATH (used for `sample.zip` fixture generation).
+
 3. Generate fixtures and start fixture server:
 
 ```bash
 cd /path/to/kkFileView
-node tests/e2e/scripts/generate-fixtures.mjs
+npm run gen:all
 cd tests/e2e/fixtures && python3 -m http.server 18080
 ```