UPDATE/REFACTOR: Rework of UserPage;

FIX: Fallback for profile pictures;
REFACTOR: Removal of unnecessary files & routes;
REFACTOR: Improve documentation for flask routes;
FIX: Correct data to return when fetching vods;

frontend/src/hooks/useSameUser.ts

@@ -1,24 +0,0 @@
-import { useEffect, useState } from "react"
-
-export function useSameUser({ username }: { username: string | undefined }) {
-    const [isSame, setIsSame] = useState(false);
-
-    useEffect(() => {
-        const fetchStatus = async () => {
-            try {
-                const response = await fetch(`/api/user/same/${username}`);
-                if (!response.ok) {
-                    throw new Error("Failed to validate user");
-                }
-                const data = await response.json();
-                setIsSame(data.same);
-            } catch (error) {
-                console.error("Error:", error);
-            }
-        };
-
-        fetchStatus();
-    }, []);
-
-    return isSame;
-}