[terminal] updated typing for new rapidfuzz

Author: MrClock8163

src/instrumentman/terminal/app.py

@@ -244,8 +244,15 @@ async def get_suggestion(self, value: str) -> str | None:
 
         separator = "." if path != "" else ""
 
-        suggestion = process.extractOne(
-            partial, suggest, scorer=fuzz.partial_ratio)[0]
+        extracted = process.extractOne(
+            partial,
+            suggest,
+            scorer=fuzz.partial_ratio
+        )
+        if extracted is None:
+            return None
+
+        suggestion = extracted[0]
 
         return f"{path}{separator}{suggestion}"