Fixes search in crafting menu (#94623)

## About The Pull Request
The frontend is expecting a recipe's requirements `reqs` to be an
object, but it doesn't send it when there are none

<img width="415" height="102" alt="image"
src="https://github.com/user-attachments/assets/b4c453e6-6d17-4733-bfe2-3e44153d7962"
/>

This kills the tgui
## Why It's Good For The Game
Fixes #94604
## Changelog
🆑
fix: Fixed a bluescreen in the personal crafting menu
/🆑

code/datums/components/crafting/crafting.dm

@@ -677,8 +677,8 @@
 			data["structures"] += atoms.Find(req_atom)
 
 	// Ingredients / Materials
+	data["reqs"] = list()
 	if(recipe.reqs.len)
-		data["reqs"] = list()
 		for(var/req_atom in recipe.reqs)
 			var/id = atoms.Find(req_atom)
 			data["reqs"]["[id]"] = recipe.reqs[req_atom]