Fix: Change search endpoint from POST to GET request

- Changed from requests.get() with json body to params for query parameters
- GET requests should use query parameters, not JSON body

Author: ethan-mcmanus-dev

frontend/web/app.py

@@ -27,7 +27,7 @@
 def search_videos(query: str):
     """Send search query to backend."""
     try:
-        resp = requests.post(SEARCH_API_URL, json={"query": query, "top_k": 10}, timeout=30)
+        resp = requests.get(SEARCH_API_URL, params={"query": query}, timeout=30)
         if resp.status_code == 200:
             return resp.json()
         else: